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152 results on '"Dababneh, S."'

1. Determination of luminosity for in-ring reactions: A new approach for the low-energy domain

Author

Xing, Y. M., Glorius, J., Varga, L., Bott, L., Bruckner, C. Brandau B., Chen, R. J., Chen, X., Dababneh, S., Davinson, T., Erbacher, P., Fiebiger, S., Gassner, T., Gobel, K., Groothuis, M., Gumberidze, A., Gyurky, G., Heil, M., Hess, R., Hensch, R., Hillmann, P., Hillenbrand, P. -M., Hinrichs, O., Jurado, B., Kausch, T., Khodaparast, A., Kisselbach, T., Klapper, N., Kozhuharov, C., Kurtulgil, D., Lane, G., Langer, C., Lederer-Woods, C., Lestinsky, M., Litvinov, S., Litvinov, Yu. A., Loher, B., Petridis, N., Popp, U., Reed, M., Reifarth, R., Sanjari, M. S., Simon, H., Slavkovska, Z., Spillmann, U., Steck, M., Stohlker, T., Stumm, J., Szucs, T., Nguyen, T. T., Zadeh, A. Taremi, Thomas, B., Torilov, S. Yu., Tornqvist, H., Trageser, C., Trotsenko, S., Volknandt, M., Wang, M., Weigand, M., Wolf, C., Woods, P. J., Zhang, Y. H., and Zhou, X. H.

Subjects
Nuclear Experiment
Abstract

Luminosity is a measure of the colliding frequency between beam and target and it is a crucial parameter for the measurement of absolute values, such as reaction cross sections. In this paper, we make use of experimental data from the ESR storage ring to demonstrate that the luminosity can be precisely determined by modelling the measured Rutherford scattering distribution. The obtained results are in good agreement with an independent measurement based on the x-ray normalization method. Our new method provides an alternative way to precisely measure the luminosity in low-energy stored-beam configurations. This can be of great value in particular in dedicated low-energy storage rings where established methods are difficult or impossible to apply., Comment: 8 pages, 5 figures

Published
2020
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2. Electron capture of Xe$^{54+}$ in collisions with H${_2}$ molecules in the energy range between 5.5 MeV/u and 30.9 MeV/u

Author

Kröger, F. M., Weber, G., Herdrich, M. O., Glorius, J., Langer, C., Slavkovská, Z., Bott, L., Brandau, C., Brückner, B., Blaum, K., Chen, X., Dababneh, S., Davinson, T., Erbacher, P., Fiebiger, S., Gaßner, T., Göbel, K., Groothuis, M., Gumberidze, A., Gyürky, Gy., Hagmann, S., Hahn, C., Heil, M., Hess, R., Hensch, R., Hillmann, P., Hillenbrand, P. -M., Hinrichs, O., Jurado, B., Kausch, T., Khodaparast, A., Kisselbach, T., Klapper, N., Kozhuharov, C., Kurtulgil, D., Lane, G., Lederer-Woods, C., Lestinsky, M., Litvinov, S., Litvinov, Yu. A., Löher, B., Nolden, F., Petridis, N., Popp, U., Reed, M., Reifarth, R., Sanjari, M. S., Simon, H., Spillmann, U., Steck, M., Stumm, J., Szücs, T., Nguyen, T. T., Zadeh, A. Taremi, Thomas, B., Torilov, S. Yu., Törnqvist, H., Trageser, C., Trotsenko, S., Volknandt, M., Weigand, M., Wolf, C., Woods, P. J., Shevelko, V. P., Tolstikhina, I. Yu., and Stöhlker, Th.

Subjects
Physics - Atomic Physics
Abstract

The electron capture process was studied for Xe$^{54+}$ colliding with H$_2$ molecules at the internal gas target of the ESR storage ring at GSI, Darmstadt. Cross section values for electron capture into excited projectile states were deduced from the observed emission cross section of Lyman radiation, being emitted by the hydrogen-like ions subsequent to the capture of a target electron. The ion beam energy range was varied between 5.5 MeV/u and 30.9 MeV/u by applying the deceleration mode of the ESR. Thus, electron capture data was recorded at the intermediate and in particular the low collision energy regime, well below the beam energy necessary to produce bare xenon ions. The obtained data is found to be in reasonable qualitative agreement with theoretical approaches, while a commonly applied empirical formula significantly overestimates the experimental findings.

Published
2020
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3. Approaching the Gamow window with stored ions: Direct measurement of $^{124}$Xe(p,$\gamma$) in the ESR storage ring

Author

Glorius, J., Langer, C., Slavkovská, Z., Bott, L., Brandau, C., Brückner, B., Blaum, K., Chen, X., Dababneh, S., Davinson, T., Erbacher, P., Fiebiger, S., Gaßner, T., Göbel, K., Groothuis, M., Gumberidze, A., Gyürky, G., Heil, M., Hess, R., Hensch, R., Hillmann, P., Hillenbrand, P. -M., Hinrichs, O., Jurado, B., Kausch, T., Khodaparast, A., Kisselbach, T., Klapper, N., Kozhuharov, C., Kurtulgil, D., Lane, G., Lederer-Woods, C., Lestinsky, M., Litvinov, S., Litvinov, Yu. A., Löher, B., Nolden, F., Petridis, N., Popp, U., Rauscher, T., Reed, M., Reifarth, R., Sanjari, M. S., Savran, D., Simon, H., Spillmann, U., Steck, M., Stöhlker, T., Stumm, J., Surzhykov, A., Szücs, T., Nguyen, T. T., Zadeh, A. Taremi, Thomas, B., Torilov, S. Yu., Törnqvist, H., Träger, M., Trageser, C., Trotsenko, S., Varga, L., Volknandt, M., Weick, H., Weigand, M., Wolf, C., Woods, P. J., and Xing, Y. M.

Subjects
Nuclear Experiment
Abstract

We report the first measurement of low-energy proton-capture cross sections of $^{124}$Xe in a heavy ion storage ring. $^{124}$Xe$^{54+}$ ions of five different beam energies between 5.5 AMeV and 8 AMeV were stored to collide with a windowless hydrogen target. The $^{125}$Cs reaction products were directly detected. The interaction energies are located on the high energy tail of the Gamow window for hot, explosive scenarios such as supernovae and X-ray binaries. The results serve as an important test of predicted astrophysical reaction rates in this mass range. Good agreement in the prediction of the astrophysically important proton width at low energy is found, with only a 30% difference between measurement and theory. Larger deviations are found above the neutron emission threshold, where also neutron- and ${\gamma}$-widths significantly impact the cross sections. The newly established experimental method is a very powerful tool to investigate nuclear reactions on rare ion beams at low center-of-mass energies.

Published
2019
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5. Neutron activation of natural zinc samples at kT = 25 keV

Author

Reifarth, R., Dababneh, S., Heil, M., Käppeler, F., Plag, R., Sonnabend, K., and Uberseder, E.

Subjects
Astrophysics - Instrumentation and Methods for Astrophysics, Nuclear Experiment
Abstract

The neutron-capture cross sections of 64Zn, 68Zn, and 70Zn have been measured with the activation technique in a quasistellar neutron spectrum corresponding to a thermal energy of kT = 25 keV. By a series of repeated irradiations with different experimental conditions, an uncertainty of 3% could be achieved for the 64Zn(n,g)65Zn cross section and for the partial cross section 68Zn(n,g)69Zn-m feeding the isomeric state in 69Zn. For the partial cross sections 70Zn(n,g)71Zn-m and 70Zn(n,g)71Zn-g, which had not been measured so far, uncertainties of only 16% and 6% could be reached because of limited counting statistics and decay intensities. Compared to previous measurements on 64,68Zn, the uncertainties could be significantly improved, while the 70Zn cross section was found to be two times smaller than existing model calculations. From these results Maxwellian average cross sections were determined between 5 and 100 keV. Additionally, the beta-decay half-life of 71Zn-m could be determined with significantly improved accuracy. The consequences of these data have been studied by network calculations for convective core He burning and convective shell C burning in massive stars.

Published
2013
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6. Stellar (n,gamma) cross sections of p-process isotopes PartI: 102Pd, 120Te, 130,132Ba,and 156Dy

Author

Dillmann, I., Domingo-Pardo, C., Heil, M., Kaeppeler, F., Walter, S., Dababneh, S., Rauscher, T., and Thielemann, F. -K.

Subjects
Astrophysics - Solar and Stellar Astrophysics, Astrophysics - Instrumentation and Methods for Astrophysics
Abstract

We have investigated the (n,gamma) cross sections of p-process isotopes with the activation technique. The measurements were carried out at the Karlsruhe Van de Graaff accelerator using the 7Li(p,n)7Be source for simulating a Maxwellian neutron distribution of kT = 25 keV. Stellar cross section measurements are reported for the light p-process isotopes 102Pd, 120Te, 130,132Ba, and 156Dy. In a following paper the cross sections of 168Yb, 180W, 184Os, 190Pt, and 196Hg will be discussed. The data are extrapolated to p-process energies by including information from evaluated nuclear data libraries. The results are compared to standard Hauser-Feshbach models frequently used in astrophysics., Comment: 13 pages, 4 figures

Published
2010
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7. The 14C(n,g) cross section between 10 keV and 1 MeV

Author

Reifarth, R., Heil, M., Forssen, C., Besserer, U., Couture, A., Dababneh, S., Doerr, L., Goerres, J., Haight, R. C., Kaeppeler, F., Mengoni, A., O'Brien, S., Patronis, N., Plag, R., Rundberg, R. S., Wiescher, M., and Wilhelmy, J. B.

Subjects
Astrophysics - Instrumentation and Methods for Astrophysics, Nuclear Experiment
Abstract

The neutron capture cross section of 14C is of relevance for several nucleosynthesis scenarios such as inhomogeneous Big Bang models, neutron induced CNO cycles, and neutrino driven wind models for the r process. The 14C(n,g) reaction is also important for the validation of the Coulomb dissociation method, where the (n,g) cross section can be indirectly obtained via the time-reversed process. So far, the example of 14C is the only case with neutrons where both, direct measurement and indirect Coulomb dissociation, have been applied. Unfortunately, the interpretation is obscured by discrepancies between several experiments and theory. Therefore, we report on new direct measurements of the 14C(n,g) reaction with neutron energies ranging from 20 to 800 keV.

Published
2009
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9. The stellar (n,gamma) cross section of 62Ni

Author

Nassar, H., Paul, M., Ahmad, I., Berkovits, D., Bettan, M., Collon, P., Dababneh, S., Ghelberg, S., Greene, J. P., Heger, A., Heil, M., Henderson, D. J., Jiang, C. L., Kaeppeler, F., Koivisto, H., O'Brien, S., Pardo, R. C., Patronis, N., Pennington, T., Plag, R., Rehm, K. E., Reifarth, R., Scott, R., Sinha, S., Tang, X., and Vondrasek, R.

Subjects
Nuclear Experiment
Abstract

The 62Ni(n,gamma)63Ni(t_1/2=100+-2 yrs) reaction plays an important role in the control of the flow path of the slow neutron-capture (s-) nucleosynthesis process. We have measured for the first time the total cross section of this reaction for a quasi-Maxwellian (kT = 25 keV) neutron flux. The measurement was performed by fast-neutron activation, combined with accelerator mass spectrometry to detect directly the 63Ni product nuclei. The experimental value of 28.4+-2.8 mb, fairly consistent with a recent theoretical estimate, affects the calculated net yield of 62Ni itself and the whole distribution of nuclei with 62

Published
2004
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13. Electron capture of Xe54+ in collisions with H2 molecules in the energy range between 5.5 and 30.9 MeV/u

Author

Kröger, F. M., Weber, G., Herdrich, M. O., Glorius, J., Langer, C., Slavkovská, Z., Bott, L., Brandau, C., Brückner, B., Blaum, K., Chen, X., Dababneh, S., Davinson, T., Erbacher, P., Fiebiger, S., Gaßner, T., Göbel, K., Groothuis, M., Gumberidze, A., Gyürky, Gy., Hagmann, S., Hahn, C., Heil, M., Hess, R., Hensch, R., Hillmann, P., Hillenbrand, P.-M., Hinrichs, O., Jurado, B., Kausch, T., Khodaparast, A., Kisselbach, T., Klapper, N., Kozhuharov, C., Kurtulgil, D., Lane, G., Lederer-Woods, C., Lestinsky, M., Litvinov, S., Litvinov, Yury, Löher, B., Nolden, F., Petridis, N., Popp, U., Reed, M., Reifarth, R., Sanjari, M. S., Simon, H., Spillmann, U., Steck, M., Stumm, J., Szücs, T., Nguyen, T. T., Taremi Zadeh, A., Thomas, B., Torilov, S. Yu., Törnqvist, H., Trageser, C., Trotsenko, S., Volknandt, M., Weigand, M., Wolf, C., Woods, P. J., Shevelko, V. P., Tolstikhina, I. Yu., and Stöhlker, Th.

Subjects
Atomic Physics (physics.atom-ph), FOS: Physical sciences, ddc:530, Präzisionsexperimente - Abteilung Blaum, Nuclear Experiment, physics.atom-ph, Physics - Atomic Physics
Abstract

Physical review / A 102(4), 042825 (2020). doi:10.1103/PhysRevA.102.042825, Published by AIP Publishing, Woodbury, NY

Published
2020

14. Electron capture of ${\mathrm{Xe}}^{54+}$ in collisions with $\mathrm{H}{}_{2}$ molecules in the energy range between 5.5 and 30.9 MeV/u

Author

Kröger, F.M., Weber, G., Herdrich, M.O., Glorius, J., Langer, C., Slavkovská, Z., Bott, L., Brandau, C., Brückner, B., Blaum, K., Chen, X., Dababneh, S., Davinson, T., Erbacher, P., Fiebiger, S., Gaßner, T., Göbel, K., Groothuis, M., Gumberidze, A., Gyürky, Gy., Hagmann, S., Hahn, C., Heil, M., Hess, R., Hensch, R., Hillmann, P., Hillenbrand, P.-M., Hinrichs, O., Jurado, B., Kausch, T., Khodaparast, A., Kisselbach, T., Klapper, N., Kozhuharov, C., Kurtulgil, D., Lane, G., Lederer-Woods, C., Lestinsky, M., Litvinov, S., Litvinov, Yu.A., Löher, B., Nolden, F., Petridis, N., Popp, U., Reed, M., Reifarth, R., Sanjari, M.S., Simon, H., Spillmann, U., Steck, M., Stumm, J., Szücs, T., Nguyen, T.T., Taremi Zadeh, A., Thomas, B., Torilov, S.Yu., Törnqvist, H., Trageser, C., Trotsenko, S., Volknandt, M., Weigand, M., Wolf, C., Woods, P.J., Shevelko, V.P., Tolstikhina, I.Yu., Stöhlker, Th., Centre d'Etudes Nucléaires de Bordeaux Gradignan (CENBG), and Université Sciences et Technologies - Bordeaux 1-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)

Subjects
[PHYS]Physics [physics], Nuclear Experiment
Abstract

International audience; The electron-capture process was studied for Xe54+ colliding with H2 molecules at the internal gas target of the Experimental Storage Ring (ESR) at GSI, Darmstadt. Cross-section values for electron capture into excited projectile states were deduced from the observed emission cross section of Lyman radiation, being emitted by the hydrogenlike ions subsequent to the capture of a target electron. The ion beam energy range was varied between 5.5 and 30.9 MeV/u by applying the deceleration mode of the ESR. Thus, electron-capture data were recorded at the intermediate and, in particular, the low-collision-energy regime, well below the beam energy necessary to produce bare xenon ions. The obtained data are found to be in reasonable qualitative agreement with theoretical approaches, while a commonly applied empirical formula significantly overestimates the experimental findings.

Published
2020

15. Determination of luminosity for in-ring reactions: A new approach for the low-energy domain

Author

Xing, Y.M., primary, Glorius, J., additional, Varga, L., additional, Bott, L., additional, Brandau, C., additional, Brückner, B., additional, Chen, R.J., additional, Chen, X., additional, Dababneh, S., additional, Davinson, T., additional, Erbacher, P., additional, Fiebiger, S., additional, Gaßner, T., additional, Göbel, K., additional, Groothuis, M., additional, Gumberidze, A., additional, Gyürky, G., additional, Heil, M., additional, Hess, R., additional, Hensch, R., additional, Hillmann, P., additional, Hillenbrand, P.-M., additional, Hinrichs, O., additional, Jurado, B., additional, Kausch, T., additional, Khodaparast, A., additional, Kisselbach, T., additional, Klapper, N., additional, Kozhuharov, C., additional, Kurtulgil, D., additional, Lane, G., additional, Langer, C., additional, Lederer-Woods, C., additional, Lestinsky, M., additional, Litvinov, S., additional, Litvinov, Yu.A., additional, Löher, B., additional, Petridis, N., additional, Popp, U., additional, Reed, M., additional, Reifarth, R., additional, Sanjari, M.S., additional, Simon, H., additional, Slavkovská, Z., additional, Spillmann, U., additional, Steck, M., additional, Stöhlker, T., additional, Stumm, J., additional, Szücs, T., additional, Nguyen, T.T., additional, Zadeh, A. Taremi, additional, Thomas, B., additional, Torilov, S.Yu., additional, Törnqvist, H., additional, Trageser, C., additional, Trotsenko, S., additional, Volknandt, M., additional, Wang, M., additional, Weigand, M., additional, Wolf, C., additional, Woods, P.J., additional, Zhang, Y.H., additional, and Zhou, X.H., additional

Published
2020
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16. Electron capture of Xe54+ in collisions with H2 molecules in the energy range between 5.5 and 30.9 MeV/u

Author

Kröger, F. M., primary, Weber, G., additional, Herdrich, M. O., additional, Glorius, J., additional, Langer, C., additional, Slavkovská, Z., additional, Bott, L., additional, Brandau, C., additional, Brückner, B., additional, Blaum, K., additional, Chen, X., additional, Dababneh, S., additional, Davinson, T., additional, Erbacher, P., additional, Fiebiger, S., additional, Gaßner, T., additional, Göbel, K., additional, Groothuis, M., additional, Gumberidze, A., additional, Gyürky, Gy., additional, Hagmann, S., additional, Hahn, C., additional, Heil, M., additional, Hess, R., additional, Hensch, R., additional, Hillmann, P., additional, Hillenbrand, P.-M., additional, Hinrichs, O., additional, Jurado, B., additional, Kausch, T., additional, Khodaparast, A., additional, Kisselbach, T., additional, Klapper, N., additional, Kozhuharov, C., additional, Kurtulgil, D., additional, Lane, G., additional, Lederer-Woods, C., additional, Lestinsky, M., additional, Litvinov, S., additional, Litvinov, Yu. A., additional, Löher, B., additional, Nolden, F., additional, Petridis, N., additional, Popp, U., additional, Reed, M., additional, Reifarth, R., additional, Sanjari, M. S., additional, Simon, H., additional, Spillmann, U., additional, Steck, M., additional, Stumm, J., additional, Szücs, T., additional, Nguyen, T. T., additional, Taremi Zadeh, A., additional, Thomas, B., additional, Torilov, S. Yu., additional, Törnqvist, H., additional, Trageser, C., additional, Trotsenko, S., additional, Volknandt, M., additional, Weigand, M., additional, Wolf, C., additional, Woods, P. J., additional, Shevelko, V. P., additional, Tolstikhina, I. Yu., additional, and Stöhlker, Th., additional

Published
2020
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17. Stellar neutron capture rates of 14C

Author

Reifarth, R., Heil, M., Plag, R., Besserer, U., Dababneh, S., Dörr, L., Görres, J., Haight, R.C., Käppeler, F., Mengoni, A., O'Brien, S., Patronis, N., Rundberg, R.S., Wiescher, M., and Wilhelmy, J.B.

Published
2005
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18. Measurement of the 151Sm(n, γ) 152Sm cross section at n_TOF

Author

Marrone, S., Abbondanno, U., Aerts, G., Alvarez-Velarde, F., Álvarez-Pol, H., Andriamonje, S., Andrzejewski, J., Badurek, G., Baumann, P., Bečvář, F., Benlliure, J., Berthoumieux, E., Calviño, F., Cano-Ott, D., Capote, R., Cennini, P., Chepel, V., Chiaveri, E., Colonna, N., Cortes, G., Cortina, D., Couture, A., Cox, J., Dababneh, S., Dahlfors, M., David, S., Dolfini, R., Domingo-Pardo, C., Duran, I., Embid-Segura, M., Ferrant, L., Ferrari, A., Ferreira-Marques, R., Frais-Koelbl, H., Furman, W., Goncalves, I., Gallino, R., Gonzalez-Romero, E., Goverdovski, A., Gramegna, F., Griesmayer, E., Gunsing, F., Haas, B., Haight, R., Heil, M., Herrera-Martinez, A., Isaev, S., Jericha, E., Käppeler, F., Kadi, Y., Karadimos, D., Kerveno, M., Ketlerov, V., Koehler, P., Konovalov, V., Krtička, M., Lamboudis, C., Leeb, H., Lindote, A., Lopes, I., Lozano, M., Lukic, S., Marganiec, J., Martinez-Val, J., Mastinu, P., Mengoni, A., Milazzo, P.M., Molina-Coballes, A., Moreau, C., Mosconi, M., Neves, F., Oberhummer, H., O'Brien, S., Pancin, J., Papaevangelou, T., Paradela, C., Pavlik, A., Pavlopoulos, P., Perlado, J.M., Perrot, L., Pignatari, M., Flag, R., Plompen, A., Plukis, A., Poch, A., Policarpo, A., Pretel, C., Quesada, J., Raman, S., Rapp, W., Rauscher, T., Reifarth, R., Rosetti, M., Rubbia, C., Rudolf, G., Rullhusen, P., Salgado, J., Scares, J.C., Stephan, C., Tagliente, G., Tain, J.L., Tassan-Got, L., Tavora, L., Terlizzi, R., Vannini, G., Vaz, P., Ventura, A., Villamarin, D., Vincente, M.C., Vlachoudis, V., Voss, F., Wendler, H., Wiescher, M., and Wisshak, K.

Published
2005
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19. Neutron capture cross section measurements for nuclear astrophysics at CERN n_TOF

Author

Abbondanno, U., Aerts, G., Alvarez-Velarde, F., Álvarez-Pol, H., Andriamonje, S., Andrzejewski, J., Badurek, G., Baumann, P., Bečvář, F., Benlliure, J., Berthoumieux, E., Calviño, F., Cano-Ott, D., Capote, R., Cennini, P., Chepel, V., Chiaveri, E., Colonna, N., Cortes, G., Cortina, D., Couture, A., Cox, J., Dababneh, S., Dahlfors, M., David, S., Dolfini, R., Domingo-Pardo, C., Duran, I., Embid-Segura, M., Ferrant, L., Ferrari, A., Ferreira-Marques, R., Frais-Kölbl, H., Furman, W., Goncalves, I., Gallino, R., Gonzalez-Romero, E., Goverdovski, A., Gramegna, F., Griesmayer, E., Gunsing, F., Haas, B., Haight, R., Heil, M., Herrera-Martinez, A., Isaev, S., Jericha, E., Käppeler, F., Kadi, Y., Karadimos, D., Kerveno, M., Ketlerov, V., Koehler, P., Konovalov, V., Krtička, M., Lamboudis, C., Leeb, H., Lindote, A., Lopes, I., Lorusso, G., Lozano, M., Lukic, S., Marganiec, J., Marrone, S., Martinez-Val, J., Mastinu, P., Mengoni, A., Milazzo, P.M., Molina-Coballes, A., Moreau, C., Mosconi, M., Neves, F., Oberhummer, H., O'Brien, S., Pancin, J., Papaevangelou, T., Paradela, C., Pavlik, A., Pavlopoulos, P., Perlado, J.M., Perrot, L., Pignatari, M., Plag, R., Plompen, A., Plukis, A., Poch, A., Policarpo, A., Pretel, C., Quesada, J., Rapp, W., Rauscher, T., Reifarth, R., Rosetti, M., Rubbia, C., Rudolf, G., Rullhusen, P., Salgado, J., Soares, J.C., Stephan, C., Tagliente, G., Tain, J.L., Tassan-Got, L., Tavora, L., Terlizzi, R., Vannini, G., Vaz, P., Ventura, A., Villamarin, D., Vincente, M.C., Vlachoudis, V., Voss, F., Wendler, H., Wiescher, M., and Wisshak, K.

Published
2005
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21. Measurements of the 90,91,92,94,96Zr( n, γ) cross-sections at n_TOF

Author

Tagliente, G., Abbondanno, U., Aerts, G., Alvarez-Velarde, F., Álvarez-Pol, H., Andriamonje, S., Andrzejewski, J., Badurek, G., Baumann, P., Bečvář, F., Benlliure, J., Berthoumieux, E., Calviño, F., Cano-Ott, D., Capote, R., Cennini, P., Chepel, V., Chiaveri, E., Colonna, N., Cortes, G., Cortina, D., Couture, A., Cox, J., Dababneh, S., Dahlfors, M., David, S., Dolfini, R., Domingo-Pardo, C., Duran, I., Embid-Segura, M., Ferrant, L., Ferrari, A., Ferreira-Marques, R., Frais-Köelbl, H., Furman, W., Goncalves, I., Gallino, R., Gonzalez-Romero, E., Goverdovski, A., Gramegna, F., Griesmayer, E., Gunsing, F., Haas, B., Haight, R., Heil, M., Herrera-Martinez, A., Isaev, S., Jericha, E., Käppeler, F., Kadi, Y., Karadimos, D., Kerveno, M., Ketlerov, V., Koehler, P., Konovalov, V., Krtička, M., Lamboudis, C., Leeb, H., Lindote, A., Lopes, I., Lorusso, G., Lozano, M., Lukic, S., Marganiec, J., Marrone, S., Martinez-Val, J., Mastinu, P., Mengoni, A., Milazzo, P.M., Molina-Coballes, A., Moreau, C., Mosconi, M., Neves, F., Oberhummer, H., O'Brien, S., Pancin, J., Papaevangelou, T., Paradela, C., Pavlik, A., Pavlopoulos, P., Perlado, J.M., Perrot, L., Pignatari, M., Plag, R., Plompen, A., Plukis, A., Poch, A., Policarpo, A., Pretel, C., Quesada, J., Rapp, W., Rauscher, T., Reifarth, R., Rosetti, M., Rubbia, C., Rudolf, G., Rullhusen, P., Salgado, J., Soares, J.C., Stephan, C., Tain, J.L., Tassan-Got, L., Tavora, L., Terlizzi, R., Vannini, G., Vaz, P., Ventura, A., Villamarin, D., Vincente, M.C., Vlachoudis, V., Voss, F., Wendler, H., Wiescher, M., and Wisshak, K.

Published
2005
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22. The data acquisition system of the neutron time-of-flight facility n_TOF at CERN

Author

Abbondanno, U., Aerts, G., Álvarez, F., Álvarez, H., Andriamonje, S., Andrzejewski, J., Badurek, G., Baumann, P., Bečvář, F., Benlliure, J., Berthomieux, E., Betev, B., Calviño, F., Cano-Ott, D., Capote, R., Cennini, P., Chepel, V., Chiaveri, E., Colonna, N., Cortes, G., Cortina, D., Couture, A., Cox, J., Dababneh, S., David, S., Dolfini, R., Domingo-Pardo, C., Duran, I., Embid-Segura, M., Ferrant, L., Ferrari, A., Ferreira-Marques, R., Frais-Koelbl, H., Furman, W., Goncalves, I., Gonzalez-Romero, E., Goverdovski, A., Gramegna, F., Griesmayer, E., Gunsing, F., Haas, B., Haight, R., Heil, M., Herrera-Martinez, A., Isaev, S., Jericha, E., Kadi, Y., Käppeler, F., Kerveno, M., Ketlerov, V., Koehler, P.E., Konovalov, V., Krtička, M., Leeb, H., Lindote, A., Lopes, M.I., Lozano, M., Lukic, S., Marganiec, J., Marrone, S., Martinez-Val, J., Mastinu, P., Mengoni, A., Milazzo, P.M., Molina-Coballes, A., Moreau, C., Mosconi, M., Neves, F., Oberhummer, H., O'Brien, S., Pancin, J., Papaevangelou, T., Paradela, C., Pavlik, A., Pavlopoulos, P., Perlado, J.M., Perrot, L., Peskov, V., Plag, R., Plompen, A., Plukis, A., Poch, A., Policarpo, A., Pretel, C., Quesada, J.M., Rapp, W., Rauscher, T., Reifarth, R., Rosetti, M., Rubbia, C., Rudolf, G., Rullhusen, P., Salgado, J., Schäfer, E., Soares, J.C., Stephan, C., Tagliente, G., Tain, J.L., Tassan-Got, L., Tavora, L.M.N., Terlizzi, R., Vannini, G., Vaz, P., Ventura, A., Villamarin-Fernandez, D., Vincente-Vincente, M., Vlachoudis, V., Voss, F., Wendler, H., Wiescher, M., and Wisshak, K.

Published
2005
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23. Approaching the Gamow Window with Stored Ions::Direct Measurement of 124Xe(p,γ) in the ESR Storage Ring

Author

Glorius, J., Langer, C., Slavkovská, Z., Bott, L., Brandau, C., Bückner, B., Blaum, K., Chen, X., Dababneh, S., Davinson, T., Erbacher, P., Fiebiger, S., Gaßner, T., Göbel, K., Groothuis, M., Gumberidze, A., Gyürky, G., Heil, M., Hess, R., Hensch, R., Hillmann, P., Hillenbrand, P., Hinrichs, O., Jurado, B., Kausch, T., Khodaparast, A., Kisselbach, T., Klapper, N., Kozhuharov, C., Kurtulgil, D., Lane, G., Lederer-Woods, C., Lestinsky, M., Litvinov, S., Litvinov, Y., Löher, B., Nolden, F., Petridis, N., Popp, U., Rauscher, T., Reed, M., Reifarth, R., Sanjari, M., Savran, D., Simon, H., Spillmann, U., Steck, M., Stöhlker, T., Stumm, J., Surzhykov, A., Szücs, T., Nguyen, T., Taremi Zadeh, A., Thomas, B., Torilov, S., Törnqvist, H., Träger, M., Trageser, C., Trotsenko, S., Varga, L., Volknandt, M., Weigand, M., Weick, H., Wolf, C., Woods, P., and Xing, Y.

Subjects
Präzisionsexperimente - Abteilung Blaum, Nuclear Experiment, nucl-ex
Abstract

We report the first measurement of low-energy proton-capture cross sections of 124Xe in a heavy-ion storage ring. 124Xe54+ ions of five different beam energies between 5.5 and 8 AMeV were stored to collide with a windowless hydrogen target. The 125Cs reaction products were directly detected. The interaction energies are located on the high energy tail of the Gamow window for hot, explosive scenarios such as supernovae and x-ray binaries. The results serve as an important test of predicted astrophysical reaction rates in this mass range. Good agreement in the prediction of the astrophysically important proton width at low energy is found, with only a 30% difference between measurement and theory. Larger deviations are found above the neutron emission threshold, where also neutron and γ widths significantly impact the cross sections. The newly established experimental method is a very powerful tool to investigate nuclear reactions on rare ion beams at low center-of-mass energies.

Published
2019

24. Approaching the Gamow Window with Stored Ions: Direct Measurement of $^{124}$Xe (p , γ) in the ESR Storage Ring

Author

Glorius, J., Langer, C., Slavkovská, Z., Bott, L., Brandau, C., Brückner, B., Blaum, K., Chen, X., Dababneh, S., Davinson, T., Erbacher, P., Fiebiger, S., Gaßner, T., Göbel, K., Groothuis, M., Gumberidze, A., Gyürky, G., Heil, M., Hess, R., Hensch, R., Hillmann, P., Hillenbrand, P.-M., Hinrichs, O., Jurado, B., Kausch, T., Khodaparast, A., Kisselbach, T., Klapper, N., Kozhuharov, C., Kurtulgil, D., Lane, G., Lederer-Woods, C., Lestinsky, M., Litvinov, S., Litvinov, Yu. A., Löher, B., Nolden, F., Petridis, N., Popp, U., Rauscher, T., Reed, M., Reifarth, R., Sanjari, M. S., Savran, D., Simon, H., Spillmann, U., Steck, M., Stöhlker, T., Stumm, J., Surzhykov, A., Szücs, T., Nguyen, T. T., Taremi Zadeh, A., Thomas, B., Torilov, S. Yu., Törnqvist, H., Träger, M., Trageser, C., Trotsenko, S., Varga, L., Volknandt, M., Weick, H., Weigand, M., Wolf, C., Woods, P. J., and Xing, Y. M.

Subjects
ddc:530
Abstract

Physical review letters 122(9), 092701 (2019). doi:10.1103/PhysRevLett.122.092701, Published by APS, College Park, Md.

Published
2019

25. Time–energy relation of the n_TOF neutron beam: energy standards revisited

Author

Lorusso, G., Colonna, N., Marrone, S., Tagliente, G., Heil, M., Cano-Ott, D., Mosconi, M., Moreau, C., Mengoni, A., Abbondanno, U., Aerts, G., Alvarez-Pol, H., Alvarez-Velarde, F., Andriamonje, S., Andrzejewski, J., Angelopoulos, A., Assimakopoulos, P., Badurek, G., Baumann, P., Bečvář, F., Benlliure, J., Berthomieux, E., Bisceglie, E., Calviño, P., Capote, R., Cennini, P., Chepel, V., Chiaveri, E., Coceva, C., Cortes, G., Cortina, D., Couture, A., Cox, J., Dababneh, S., Dahlfors, M., David, S., Dolfini, R., Domingo-Pardo, C., Duran, I., Eleftheriadis, C., Embid-Segura, M., Ferrant, L., Ferrari, A., Ferreira-Marques, R., Frais-Koelbl, H., Furman, W.I., Goncalves, I.F., Gonzalez-Romero, E., Goverdovski, A., Gramegna, F., Griesmayer, E., Gunsing, F., Haas, B., Haight, R., Herrera-Martinez, A., Ioannides, K.G., Isaev, S., Jericha, E., Käppeler, F., Kadi, Y., Karamanis, D., Ketlerov, V., Kitis, G., Koehler, P.E., Konovalov, V., Kossionides, E., Krticka, M., Leeb, H., Lindote, A., Lopes, M.I., Lozano, M., Lukic, S., Marganiec, J., Mastinu, P.F., Milazzo, P.M., Molina-Coballes, A., Neves, F., Oberhummer, H., O’Brien, S., Pancin, J., Paradela, C., Pavlik, A., Pavlopoulos, P., Perrot, L., Peskov, V., Plag, R., Plompen, A., Plukis, A., Poch, A., Policarpo, A., Pretel, C., Quesada, J.M., Rapp, W., Rauscher, T., Reifarth, R., Rosetti, M., Rubbia, C., Rudolf, G., Rullhusen, P., Salgado, J., Savvidis, E., Soares, J.C., Stephan, C., Tain, J.L., Tassan-Got, L., Tavora, L.M.N., Terlizzi, R., Tsangas, N., Vannini, G., Vaz, P., Ventura, A., Villamarin, D., Vincente, M.C., Vlachoudis, V., Vlastou, R., Voss, F., Wendler, H., Wiescher, M., and Wisshak, K.

Published
2004
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26. Production and isobaric separation of 63Ni ions for determination of the 62Ni(n,γ) 63Ni reaction cross section at stellar temperatures

Author

Nassar, H., Ghelberg, S., Paul, M., Dababneh, S., Heil, M., Käppeler, F., Plag, R., Ahmad, I., Greene, J.P., Henderson, D.J., Jiang, C.L., Pardo, R.C., Pennington, T., Rehm, K.E., Scott, R., Sinha, S., Tang, X., Vondrasek, R., Koivisto, H., Berkovits, D., Bettan, M., Reifarth, R., Collon, P., O'Brien, S., and Patronis, N.

Published
2004
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27. Measurement of the n_TOF beam profile with a micromegas detector

Author

Pancin, J., Abbondanno, U., Aerts, G., Alvarez, H., Andriamonje, S., Angelopoulos, A., Assimakopoulos, P., Bacri, C., Badurek, G., Baumann, P., Bečvář, F., Beer, H., Benlliure, J., Berthier, B., Berthoumieux, E., Boffi, S., Borcea, C., Boscolo-Marchi, E., Bustreo, N., Calvino, F., Cano-ott, D., Capote, R., Carlson, P., Cennini, P., Chepel, V., Chiaveri, E., Colonna, N., Cortes, G., Cortina, D., Couture, A., Cox, J., Dababneh, S., Dahlfors, M., David, S., Delbart, A., Derre, J., Dolfini, R., Domingo, C., Duran-Escribano, I., Eleftheriadis, C., Embid-Segura, M., Ferrant, L., Ferrari, A., Ferreira-Lourenco, L., Ferreiramarques, R., Frais-Koelbl, H., Furman, W., Giomataris, Y., Goncalves, I., Gonzalez-Romero, E., Goverdovski, A., Gramegna, F., Griesmayer, E., Gunsing, F., Haight, R., Heil, M., Herrera-Martinez, A., Ioannides, K., Janeva, N., Jeanneau, F., Jericha, E., Käppeler, F., Kadi, Y., Karamanis, D., Kelic, A., Ketlerov, V., Kitis, G., Koehler, P., Konovalov, V., Kossionides, E., Lacoste, V., Leeb, H., Lindote, A., Lopes, I., Lozano, M., Lukic, S., Markov, S., Marrone, S., Martinez-Val, J., Mastinu, P., Mengoni, A., Milazzo, P., Minguez, E., Molina-Coballes, A., Moreau, C., Neves, F., Oberhummer, H., O'brien, S., Papadopoulos, I., Papavengelou, T., Paradela, C., Pavlik, A., Pavlopoulos, P., Perez-Parra, A., Perlado, J., Peskov, V., Perrot, L., Plag, R., Plompen, A., Plukis, A., Poch, A., Policarpo, A., Pretel, C., Quesada, J., Radici, M., Raman, S., Rapp, W., Reifarth, R., Rejmund, F., Rosetti, M., Rubbia, C., Rudolf, G., Rullhusen, P., Salgado, J., Savvidis, E., Stephan, C., Tagliente, G., Tain, J., Tapia, C., Tassan-Got, L., Tavora, L., Terlizzi, R., Terrani, M., Tsangas, N., Vannini, G., Vaz, P., Ventura, A., Villamarin-Fernandez, D., Vincente-Vincente, M., Vlachoudis, V., Vlastou, R., Voss, F., Wendler, H., Wiescher, M., Wisshak, K., and Zanini, L.

Published
2004
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28. New experimental validation of the pulse height weighting technique for capture cross-section measurements

Author

Abbondanno, U, Aerts, G, Alvarez, H, Andriamonje, S, Angelopoulos, A, Assimakopoulos, P, Bacri, C.O, Badurek, G, Baumann, P, Bečvář, F, Beer, H, Benlliure, J, Berthier, B, Berthomieux, E, Boffi, S, Borcea, C, Boscolo-Marchi, E, Bustreo, N, Calviño, P, Cano-Ott, D, Capote, R, Carlson, P, Cennini, P, Chepel, V, Chiaveri, E, Coceva, C, Colonna, N, Cortes, G, Cortina, D, Couture, A, Cox, J, Dababneh, S, Dahlfors, M, David, S, Dolfini, R, Domingo-Pardo, C, Duran, I, Eleftheriadis, C, Embid-Segura, M, Ferrant, L, Ferrari, A, Ferreira-Lourenco, L, Ferreira-Marques, R, Frais-Koelbl, H, Furman, W.I, Giomataris, Y, Goncalves, I.F, Gonzalez-Romero, E, Goverdovski, A, Gramegna, F, Griesmayer, E, Gunsing, F, Haight, R, Heil, M, Herrera-Martinez, A, Ioannides, K.G, Janeva, N, Jericha, E, Käppeler, F, Kadi, Y, Karamanis, D, Kelic, A, Ketlerov, V, Kitis, G, Koehler, P.E, Konovalov, V, Kossionides, E, Lacoste, V, Leeb, H, Lindote, A, Lopes, M.I, Lozano, M, Lukic, S, Markov, S, Marrone, S, Martinez-Val, J, Mastinu, P, Mengoni, A, Milazzo, P.M, Minguez, E, Molina-Coballes, A, Moreau, C, Neves, F, Oberhummer, H, O'Brien, S, Pancin, J, Papaevangelou, T, Paradela, C, Pavlik, A, Pavlopoulos, P, Perez-Parra, A, Perlado, J.M, Perrot, L, Peskov, V, Plag, R, Plompen, A, Plukis, A, Poch, A, Policarpo, A, Pretel, C, Quesada, J.M, Radici, M, Raman, S, Rapp, W, Rauscher, T, Reifarth, R, Rejmund, F, Rosetti, M, Rubbia, C, Rudolf, G, Rullhusen, P, Salgado, J, Savvidis, E, Soares, J.C, Stephan, C, Tagliente, G, Tain, J.L, Tapia, C, Tassan-Got, L, Tavora, L.M.N, Terlizzi, R, Terrani, M, Tsangas, N, Vannini, G, Vaz, P, Ventura, A, Villamarin-Fernandez, D, Vincente-Vincente, M, Vlachoudis, V, Vlastou, R, Voss, F, Wendler, H, Wiescher, M, Wisshak, K, and Zanini, L

Published
2004
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30. Approaching the Gamow Window with Stored Ions: Direct Measurement of Xe-124(p,gamma) in the ESR Storage Ring

Author

Glorius, J., Langer, C, Slavkovská, Z, Bott, L, Brandau, C., Brückner, B, Blaum, K., Chen, X, Dababneh, S, Davinson, T., Lane, Gregory, Reed, Matthew, Glorius, J., Langer, C, Slavkovská, Z, Bott, L, Brandau, C., Brückner, B, Blaum, K., Chen, X, Dababneh, S, Davinson, T., Lane, Gregory, and Reed, Matthew

Abstract

We report the first measurement of low-energy proton-capture cross sections of Xe-124 in a heavy-ion storage ring. Xe-124(54+) ions of five different beam energies between 5.5 and 8 AMeV were stored to collide with a windowless hydrogen target. The Cs-125 reaction products were directly detected. The interaction energies are located on the high energy tail of the Gamow window for hot, explosive scenarios such as supernovae and x-ray binaries. The results serve as an important test of predicted astrophysical reaction rates in this mass range. Good agreement in the prediction of the astrophysically important proton width at low energy is found, with only a 30% difference between measurement and theory. Larger deviations are found above the neutron emission threshold, where also neutron and gamma widths significantly impact the cross sections. The newly established experimental method is a very powerful tool to investigate nuclear reactions on rare ion beams at low center-of-mass energies.

Published
2019

32. Approaching the Gamow Window with Stored Ions: Direct Measurement of Xe124(p,γ) in the ESR Storage Ring

Author

Glorius, J., primary, Langer, C., additional, Slavkovská, Z., additional, Bott, L., additional, Brandau, C., additional, Brückner, B., additional, Blaum, K., additional, Chen, X., additional, Dababneh, S., additional, Davinson, T., additional, Erbacher, P., additional, Fiebiger, S., additional, Gaßner, T., additional, Göbel, K., additional, Groothuis, M., additional, Gumberidze, A., additional, Gyürky, G., additional, Heil, M., additional, Hess, R., additional, Hensch, R., additional, Hillmann, P., additional, Hillenbrand, P.-M., additional, Hinrichs, O., additional, Jurado, B., additional, Kausch, T., additional, Khodaparast, A., additional, Kisselbach, T., additional, Klapper, N., additional, Kozhuharov, C., additional, Kurtulgil, D., additional, Lane, G., additional, Lederer-Woods, C., additional, Lestinsky, M., additional, Litvinov, S., additional, Litvinov, Yu. A., additional, Löher, B., additional, Nolden, F., additional, Petridis, N., additional, Popp, U., additional, Rauscher, T., additional, Reed, M., additional, Reifarth, R., additional, Sanjari, M. S., additional, Savran, D., additional, Simon, H., additional, Spillmann, U., additional, Steck, M., additional, Stöhlker, T., additional, Stumm, J., additional, Surzhykov, A., additional, Szücs, T., additional, Nguyen, T. T., additional, Taremi Zadeh, A., additional, Thomas, B., additional, Torilov, S. Yu., additional, Törnqvist, H., additional, Träger, M., additional, Trageser, C., additional, Trotsenko, S., additional, Varga, L., additional, Volknandt, M., additional, Weick, H., additional, Weigand, M., additional, Wolf, C., additional, Woods, P. J., additional, and Xing, Y. M., additional

Published
2019
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33. Nuclear astrophysics at FRANZ

Author

Reifarth, R, primary, Dababneh, S, additional, Fiebiger, S, additional, Glorius, J, additional, Göbel, K, additional, Heil, M, additional, Hillmann, P, additional, Heftrich, T, additional, Langer, C, additional, Meusel, O, additional, Plag, R, additional, Schmidt, S, additional, Slavkovská, Z, additional, Veltum, D, additional, Weigand, M, additional, Wiesner, C, additional, Wolf, C, additional, and Zadeh, A, additional

Published
2018
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37. The (14)C(n, gamma) cross section between 10 keV and 1 MeV

Author

Reifarth, R., Heil, M., Forssen, C., Besserer, U., Couture, A., Dababneh, S., Dorr, L., Gorres, J., Haight, R. C., Kappeler, F., Mengoni, A., O'Brien, S., Patronis, N., Plag, R., Rundberg, R. S., Wiescher, M., and Wilhelmy, J. B.

Subjects
heavy-elements, nuclear, nucleosynthesis, standard, rates, c-15, light, neutron diffusion, isotopes, decay
Abstract

The neutron capture cross section of (14)C is of relevance for several nucleosynthesis scenarios such as inhomogeneous Big Bang models, neutron induced CNO cycles, and neutrino driven wind models for the r process. The (14)C(n,gamma) reaction is also important for the validation of the Coulomb dissociation method, where the (n,gamma) cross section can be indirectly obtained via the time-reversed process. So far, the example of (14)C is the only case with neutrons where both, direct measurement and indirect Coulomb dissociation, have been applied. Unfortunately, the interpretation is obscured by discrepancies between several experiments and theory. Therefore, we report on new direct measurements of the (14)C(n,gamma) reaction with neutron energies ranging from 20 to 800 keV. Physical Review C

Published
2008

39. Measurement of the 151Sm n,gamma cross section from 0.6 eV to 1 MeV via the neutron time-of-flight technique at the CERN n_TOF facility

Author

Marrone, S., Abbondanno, U., Aerts, G., Alvarez-Velarde, F., Alvarez-Pol, H., Andriamonje, S., Andrzejewski, J., Badurek, G., Baumann, P., Bevá, F., Benlliure, J., Berthomieux, E., Calviño, F., Cano-Ott, D., Capote, R., Cennini, P., Chepel, V., Chiaveri, E., Colonna, N., Cortes, G., Cortina, D., Couture, A., Cox, J., Dababneh, S., Dahlfors, M., David, S., Dolfini, R., Domingo-Pardo, C., Duran-Escribano, I., Embid-Segura, M., Ferrant, L., Ferrari, Anthony, Ferreira-Marques, R., Frais-Koelbl, H., Fujii, K., I. Furman, W., Gallino, R., F. Goncalves, I., Gonzalez-Romero, E., Goverdovski, A., Gramegna, F., Griesmayer, E., Gunsing, F., Haas, B., Haight, R., Heil, M., Herrera-Martinez, A., Isaev, S., Jericha, E., Käppeler, F., Kadi, Y., Karadimos, D., Kerveno, M., Ketlerov, V., E. Koehler, P., Konovalov, V., Kritka, M., Lamboudis, C., Leeb, H., Lindote, A., I. Lopes, M., Lozano, M., Lukic, S., Marganiec, J., Martinez-Val, J., F. Mastinu, P., Mengoni, A., M. Milazzo, P., Molina-Coballes, A., Moreau, C., Mosconi, M., Neves, F., Oberhummer, H., O'Brien, S., Pancin, J., Papaevangelou, T., Paradela, C., Pavlik, A., Pavlopoulos, P., M. Perlado, J., Perrot, L., Pignatari, M., Pigni, M.T., Plag, R., Plompen, A., Plukis, A., Poch, A., Policarpo, A., Pretel, C., M. Quesada, J., Raman, S., Rapp, W., Rauscher, T., Reifarth, R., Rosetti, M., Rubbia, C., Rudolf, G., Rullhusen, P., Salgado, J., C. Soares, J., Stephan, C., Tagliente, G., Tain, J.L., Tassan-Got, L., Tavora, L.M.N., Terlizzi, R., Vannini, G., Vaz, P., Ventura, A., Villamarin-Fernandez, D., Vincente-Vincente, M., Vlachoudis, V., Voss, F., Wendler, H., Wiescher, M., Wisshak, K., Institut de Recherches Subatomiques (IReS), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Cancéropôle du Grand Est-Université Louis Pasteur - Strasbourg I-Centre National de la Recherche Scientifique (CNRS), Institut de Physique Nucléaire d'Orsay (IPNO), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Centre d'Etudes Nucléaires de Bordeaux Gradignan (CENBG), Université Sciences et Technologies - Bordeaux 1-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), nTOF, and Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11)

Subjects
[PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 25.40.Lw, 26.20.+f, 27.70.+q, 28.41.Ak
Abstract

PACS; The 151Sm n,\gamma cross section was measured with the time-of-flight technique from 0.6 eV up to 1 MeV relative to the Au standard with an overall uncertainty of typically 6%. Neutrons were produced by spallation at the innovative n_TOF facility at CERN; the \gamma rays from capture events were detected with organic C_(6)D_(6)scintillators. Experimental setup and data analysis procedures are described with emphasis on the corrections for detection efficiency, background subtraction, and neutron flux determination. At low energies, resonances could be resolved up to about 1 keV, yielding a resonance integral of 3575±210 b, an average s-wave resonance spacing of langleD_(0)\rangle$=1.49±0.07 eV, and a neutron strength function of langleS_(0)\rangle=(3.87±0.33)×10-4. Maxwellian-averaged capture cross sections are reported for thermal energies between 5 and 100 keV. These results are of relevance for nuclear structure studies, nuclear astrophysics, and nuclear technology. The new value of the Maxwellian-averaged cross section at kT=30 keV is 3.08±0.15 b, considerably larger than previous theoretical estimates, and provides better constraints for the thermodynamic conditions during the occurrence of the it slow neutron capture process in low-mass stars during their asymptotic giant branch phase.

Published
2006

40. The data acquisition system of the neutron time-of-flight facility n- TOF at CERN

Author

Abbondanno, U., Aerts, G., Alvarez-Velarde, F., Alvarez, H., Andriamonje, S., Andrzejewski, J., Badurek, G., Baumann, P., Becvar, F., Benlliure, J., Berthomieux, E., Betev, B., Calvino, P., Cano-Ott, D., Capote, R., Cennini, P., Chepel, V., Chiaveri, E., Colonna, N., Cortes, G., Cortina, D., Couture, A., Cox, J., Dababneh, S., David, S., Dolfini, R., Domingo-Pardo, C., Duran, I., Eleftheriadis, C., Embid-Segura, M., Ferrant, L., Ferrari, Anthony, Ferreira-Marques, R., Frais-Koelbl, H., Furman, W.I., Goncalves, I.F., Gonzalez-Romero, E., Goverdovski, A., Gramegna, F., Griesmayer, E., Gunsing, F., Haas, B., Haight, R., Heil, M., Herrera-Martinez, A., Isaev, S., Jericha, E., Käppeler, F., Kadi, Y., Kerveno, M., Ketlerov, V., Koehler, P.E., Konovalov, V., Kossionides, E., Krticka, M., Leeb, H., Lindote, A., Lopes, M.I., Lozano, M., Lukic, S., Marganiec, J., Marrone, S., Martinez-Val, J., Mastinu, P.F., Mengoni, A., Milazzo, P.M., Molina-Coballes, A., Moreau, C., Mosconi, M., Neves, F., Oberhummer, H., O'Brien, S., Pancin, J., Papaevangelou, T., Paradela, C., Pavlik, A., Pavlopoulos, P., Perlado, J.M., Perrot, L., Peskov, V., Plag, R., Plompen, A., Plukis, A., Poch, A., Policarpo, A., Pretel, C., Quesada, J.M., Rapp, W., Rauscher, T., Reifarth, R., Rosetti, M., Rubbia, C., Rudolf, G., Rulhusen, P., Salgado, J., Schäfer, E., Soares, J.C., Stephan, C., Tagliente, G., Tain, J.L., Tassan-Got, L., Tavora, L.M.N., Terlizzi, R., Vannini, G., Vaz, P., Ventura, A., Villamarin-Fernandez, D., Vincente-Vincente, M., Vlachoudis, V., Voss, F., Wendler, H., Wiescher, M., Wisshak, K., Universitat Politècnica de Catalunya. Departament de Física i Enginyeria Nuclear, Universitat Politècnica de Catalunya. GREENER - Grup de recerca d'estudis energètics i de les radiacions, U.Abbondanno, G. Aert, F.Alvarez, H.Alvarez, S.Andriamonje, J.Andrzejewski, G.Badurek, P.Baumann, F.Becvar, J. Benlliure, E. Berthomieux, B.Betev, F. Calvino, D.Cano-Ott, R.Capote, P.Cennini, V.Chepel, E.Chiaveri, N.Colonna, G.Corte, D.Cortina, A.Couture, J.Cox, S.Dababneh, S.David, R.Dolfini, C.Domingo-Pardo, I.Duran, M.Embid-Segura, L.Ferrant, A.Ferrari, R.Ferreira-Marque, H.Frais-Koelbl, W.Furman, I.Goncalve, E.Gonzalez-Romero, A.Goverdovski, F.Gramegna, E.Griesmayer, F.Gunsing, B.Haa, R.Haight, M.Heil, A.Herrera-Martinez, S.Isaev, E.Jericha, Y.Kadi, F.Kappeler, M.Kerveno, V.Ketlerov, P.E.Koehlera, V.Konovalov, M.Krticka, H.Leeb, A.Lindote, M.I.Lope, M. Lozano, S.Lukic, J.Marganiec, S.Marrone, J.Martinez-Val, P.Mastinu, A.Mengoni, P.M.Milazzo, A.Molina-Coballe, C.Moreau, M.Mosconi, F.Neve, H.Oberhummer, S.O'Brien, J.Pancin, T.Papaevangelou, C.Paradela, A.Pavlik, P.Pavlopoulo, J.M.Perlado, L.Perrot, V.Peskov, R.Plag, A.Plompen, A.Pluki, A. Poch, A.Policarpo, C.Pretel, J.M.Quesada, W. Rapp, T. Rauscher, R. Reifarth, M. Rosetti, C. Rubbia, G. Rudolf, P. Rullhusena, J. Salgado, E. Schaeffer, J.C. Soare, C. Stephan, G. Tagliente, J.L. Tain, L. Tassan-Got, L.M.N. Tavora, R. Terlizzi, G. Vannini, P. Vaz, A. Ventura, D. Villamarin-Fernandez, M. Vincente-Vincente, V. Vlachoudi, F. Vo, H. Wendler, M. Wiescher, K. Wisshak., Institut de Recherches Subatomiques (IReS), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Cancéropôle du Grand Est-Université Louis Pasteur - Strasbourg I-Centre National de la Recherche Scientifique (CNRS), Institut de Physique Nucléaire d'Orsay (IPNO), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), and TOF

Subjects
Nuclear and High Energy Physics, Memory buffer register, TheoryofComputation_COMPUTATIONBYABSTRACTDEVICES, Radiative capture, Computer interfaces, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 01 natural sciences, ComputingMethodologies_ARTIFICIALINTELLIGENCE, Radiació, Nuclear physics--Experiments, Nuclear magnetic resonance, Data acquisition, Neutron flux, 0103 physical sciences, Pulse shape analysis, Neutron, 010306 general physics, Instrumentation, Physics, Large Hadron Collider, Física [Àrees temàtiques de la UPC], 010308 nuclear & particles physics, business.industry, 25.40.Lw, 25.40.Ny, 29.50.+v, 29.85.+c, Neutron time-of-flight spectroscopy, TheoryofComputation_GENERAL, Dead time, Flash-ADC, Time of flight, Neutron capture, Física nuclear -- Experiments, ComputingMethodologies_PATTERNRECOGNITION, business, Computer hardware
Abstract

The n_TOF facility at CERN has been designed for the measurement of neutron capture, fission and (n; n) crosssections with high accuracy. This requires a flexible and—due to the high instantaneous neutron flux—almost dead time free data acquisition system. A scalable and versatile data solution has been designed based on 8-bit flash-ADCs with sampling rates up to 2GHz and 8 Mbyte memory buffer. The software is written in C and Cþþand is running on PCs equipped with RedHat Linux.

Published
2005

41. Stellar (n,gamma) cross section of Ni-62

Author

Nassar, H., Paul, M., Ahmad, I., Berkovits, D., Bettan, M., Collon, P., Dababneh, S., Ghelberg, S., Greene, J. P., Heger, A., Heil, M., Henderson, D. J., Jiang, C. L., Kappeler, F., Koivisto, H., O'Brien, S., Pardo, R. C., Patronis, N., Pennington, T., Plag, R., Rehm, K. E., Reifarth, R., Scott, R., Sinha, S., Tang, X., and Vondrasek, R.

Subjects
separation, massive stars, ion-source, nucleosynthesis, capture, s-process
Abstract

The Ni-62(n,gamma)Ni-63(t(1/2) = 100 +/- 2 yr) reaction plays an important role in the control of the flow path of the slow neutron-capture (s) nucleosynthesis process. We have measured for the first time the total cross section of this reaction for a quasi-Maxwellian (kT = 25 keV) neutron flux. The measurement was performed by fast-neutron activation, combined with accelerator mass spectrometry to detect directly the Ni-63 product nuclei. The experimental value of 28.4 +/- 2.8 mb, fairly consistent with a recent calculation, affects the calculated net yield of Ni-62 itself and the whole distribution of nuclei with 62 < A < 90 produced by the weak s process in massive stars. Phys Rev Lett

Published
2005

42. Time-energy relation of the n_TOF neutron beam: Energy standards revisited

Author

Lorusso, G. Colonna, N. Marrone, S. Tagliente, G. Heil, M. Cano-Ott, D. Mosconi, M. Moreau, C. Mengoni, A. Abbondanno, U. Aerts, G. Alvarez-Pol, H. Alvarez-Velarde, F. Andriamonje, S. Andrzejewski, J. Angelopoulos, A. Assimakopoulos, P. Badurek, G. Baumann, P. Bečvár, F. Benlliure, J. Berthomieux, E. Bisceglie, E. Calviño, P. Capote, R. Cennini, P. Chepel, V. Chiaveri, E. Coceva, C. Cortes, G. Cortina, D. Couture, A. Cox, J. Dababneh, S. Dahlfors, M. David, S. Dolfini, R. Domingo-Pardo, C. Duran, I. Eleftheriadis, C. Embid-Segura, M. Ferrant, L. Ferrari, A. Ferreira-Marques, R. Frais-Koelbl, H. Furman, W.I. Goncalves, I.F. Gonzalez-Romero, E. Goverdovski, A. Gramegna, F. Griesmayer, E. Gunsing, F. Haas, B. Haight, R. Herrera-Martinez, A. Ioannides, K.G. Isaev, S. Jericha, E. Käppeler, F. Kadi, Y. Karamanis, D. Ketlerov, V. Kitis, G. Koehler, P.E. Konovalov, V. Kossionides, E. Krticka, M. Leeb, H. Lindote, A. Lopes, M.I. Lozano, M. Lukic, S. Marganiec, J. Mastinu, P.F. Milazzo, P.M. Molina-Coballes, A. Neves, F. Oberhummer, H. O'Brien, S. Pancin, J. Paradela, C. Pavlik, A. Pavlopoulos, P. Perrot, L. Peskov, V. Plag, R. Plompen, A. Plukis, A. Poch, A. Policarpo, A. Pretel, C. Quesada, J.M. Rapp, W. Rauscher, T. Reifarth, R. Rosetti, M. Rubbia, C. Rudolf, G. Rullhusen, P. Salgado, J. Savvidis, E. Soares, J.C. Stephan, C. Tain, J.L. Tassan-Got, L. Tavora, L.M.N. Terlizzi, R. Tsangas, N. Vannini, G. Vaz, P. Ventura, A. Villamarin, D. Vincente, M.C. Vlachoudis, V. Vlastou, R. Voss, F. Wendler, H. Wiescher, M. Wisshak, K.

Subjects
Physics::Accelerator Physics, Nuclear Experiment
Abstract

The accurate determination of neutron cross-sections as a function of the neutron energy at a time-of-flight facility requires a precise knowledge of the time-energy relation for the neutron beam. For the n_TOF neutron beam at CERN, produced by spallation of high-energy protons on a Pb target, the time-energy relation is connected to the production mechanism and to the subsequent moderation process. A calibration of the neutron energy scale is proposed based on detailed Monte Carlo simulations of the facility. This time-energy relation has been experimentally validated by means of dedicated measurements of standard energy resonances, from 1eV to approximately 1MeV. On the basis of the present measurements, it is proposed to correct the energy of the 1.3eV resonance of 193Ir, which is commonly considered as an energy standard. © 2004 Elsevier B.V. All rights reserved.

Published
2004

43. Measurement of the n_TOF beam profile with a micromegas detector

Author

Pancin, J. Abbondanno, U. Aerts, G. Alvarez, H. Andriamonje, S. Angelopoulos, A. Assimakopoulos, P. Bacri, C. Badurek, G. Baumann, P. Bečvář, F. Beer, H. Benlliure, J. Berthier, B. Berthoumieux, E. Boffi, S. Borcea, C. Boscolo-Marchi, E. Bustreo, N. Calvino, F. Cano-ott, D. Capote, R. Carlson, P. Cennini, P. Chepel, V. Chiaveri, E. Colonna, N. Cortes, G. Cortina, D. Couture, A. Cox, J. Dababneh, S. Dahlfors, M. David, S. Delbart, A. Derre, J. Dolfini, R. Domingo, C. Duran-Escribano, I. Eleftheriadis, C. Embid-Segura, M. Ferrant, L. Ferrari, A. Ferreira-Lourenco, L. Ferreiramarques, R. Frais-Koelbl, H. Furman, W. Giomataris, Y. Goncalves, I. Gonzalez-Romero, E. Goverdovski, A. Gramegna, F. Griesmayer, E. Gunsing, F. Haight, R. Heil, M. Herrera-Martinez, A. Ioannides, K. Janeva, N. Jeanneau, F. Jericha, E. Käppeler, F. Kadi, Y. Karamanis, D. Kelic, A. Ketlerov, V. Kitis, G. Koehler, P. Konovalov, V. Kossionides, E. Lacoste, V. Leeb, H. Lindote, A. Lopes, I. Lozano, M. Lukic, S. Markov, S. Marrone, S. Martinez-Val, J. Mastinu, P. Mengoni, A. Milazzo, P. Minguez, E. Molina-Coballes, A. Moreau, C. Neves, F. Oberhummer, H. O'brien, S. Papadopoulos, I. Papavengelou, T. Paradela, C. Pavlik, A. Pavlopoulos, P. Perez-Parra, A. Perlado, J. Peskov, V. Perrot, L. Peskov, V. Plag, R. Plompen, A. Plukis, A. Poch, A. Policarpo, A. Pretel, C. Quesada, J. Radici, M. Raman, S. Rapp, W. Reifarth, R. Rejmund, F. Rosetti, M. Rubbia, C. Rudolf, G. Rullhusen, P. Salgado, J. Savvidis, E. Stephan, C. Tagliente, G. Tain, J. Tapia, C. Tassan-Got, L. Tavora, L. Terlizzi, R. Terrani, M. Tsangas, N. Vannini, G. Vaz, P. Ventura, A. Villamarin-Fernandez, D. Vincente-Vincente, M. Vlachoudis, V. Vlastou, R. Voss, F. Wendler, H. Wiescher, M. Wisshak, K. Zanini, L.

Subjects
Physics::Instrumentation and Detectors, Astrophysics::High Energy Astrophysical Phenomena, Nuclear Theory, Nuclear Experiment
Abstract

A Micromegas detector was used in the neutron Time-Of-Flight (n_TOF) facility at CERN to evaluate the spatial distribution of the neutron beam as a function of its kinetic energy. This was achieved over a large range of neutron energies by using two complementary processes: at low energy by capture of a neutron via the 6Li(n,α)t reaction, and at high energy by elastic scattering of neutrons on gas nuclei (argon+isobutane or helium+isobutane). Data are compared to Monte Carlo simulations and an analytic function fitting the beam profile has been calculated with a sufficient precision to use in neutron capture experiments at the n_TOF facility. © 2004 Elsevier B.V. All rights reserved.

Published
2004

44. Neutron capture cross section measurement of $^{151}$Sm at the CERN neutron time of flight facility (n_TOF)

Author

Abbondanno, U., Aerts, G., Alvarez-Velarde, F., Alvarez-Pol, H., Andriamonje, S., Andrzejewski, J., Badurek, G., Baumann, P., Becvar, F., Benlliure, J., Berthoumieux, E., Calvino, F., Cano-Ott, D., Capote, R., Cennini, P., Chepel, V., Chiaveri, E., Colonna, N., Cortes, G., Cortina, D., Couture, A., Cox, J., Dababneh, S., Dahlfors, M., David, S., Dolfini, R., Domingo-Pardo, C., Duran, I., Embid-Segura, M., Ferrant, L., Ferrari, Anthony, Ferreira-Marques, R., Frais-Koelbl, H., Furman, W., Goncalves, I., Gallino, R., Gonzalez-Romero, E., Goverdovski, A., Gramegna, F., Griesmayer, E., Gunsing, F., Haas, B., Haight, R., Heil, M., Herrera-Martinez, A., Isaev, S., Jericha, E., Käppeler, F., Kadi, Y., Kardimos, D., Kerveno, M., Ketlerov, V., Koehler, P., Konovalov, V., Krticka, M., Lamboudis, C., Leeb, H., Lindote, A., Lopes, I., Lozano, M., Lukic, S., Marganiec, J., Marrone, S., Martinez-Val, J., Mastinu, P., Mengoni, A., Milazzo, P.M., Molina-Coballes, A., Moreau, C., Mosconi, M., Neves, F., Oberhummer, H., O'Brien, S., Pancin, J., Papaevangelou, T., Paradela, C., Pavlik, A., Pavlopoulos, P., Perlado, J.M., Perrot, L., Pignatari, M., Plag, R., Plompen, A., Plukis, A., Poch, A., Policarpo, A., Pretel, C., Quesada, J., Raman, S., Rapp, W., Rauscher, T., Reifarth, R., Rosetti, M., Rubbia, C., Rudolf, G., Ruhlhusen, P., Salgado, J., Soares, J.C., Stephan, C., Tagliente, G., Tain, J., Tassan-Got, L., Tavora, L., Terlizzi, R., Vannini, G., Vaz, P., Ventura, A., Villamarin, D., Vincente, M.C., Vlachoudis, V., Voss, F., Wendler, H., Wiescher, M., Wisshak, K., Institut de Recherches Subatomiques (IReS), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Cancéropôle du Grand Est-Université Louis Pasteur - Strasbourg I-Centre National de la Recherche Scientifique (CNRS), Institut de Physique Nucléaire d'Orsay (IPNO), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Centre d'Etudes Nucléaires de Bordeaux Gradignan (CENBG), Université Sciences et Technologies - Bordeaux 1-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), and TOF

Subjects
ComputingMethodologies_PATTERNRECOGNITION, TheoryofComputation_COMPUTATIONBYABSTRACTDEVICES, 25.40.L.w, 26.20.+f,27.70.+q,97.10.Cv, TheoryofComputation_GENERAL, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], ComputingMethodologies_ARTIFICIALINTELLIGENCE, Nuclear Physics
Abstract

The151Sm(n,gamma)152Sm cross section has been measured at the spallation neutron facility n_TOF at CERN in the energy range from 1 eV to 1 MeV. The new facility combines excellent resolution in neutron time-of-flight, low repetition rates, and an unsurpassed instantaneous luminosity, resulting in rather favorable signal/background ratios. The 151Sm cross section is of importance for characterizing neutron capture nucleosynthesis in asymptotic giant branch stars. At a thermal energy of kT=30 keV the Maxwellian averaged cross section of this unstable isotope (t(1/2)=93 yr) was determined to be 3100+/-160 mb, significantly larger than theoretical predictions.

Published
2004

45. Neutron capture studies on unstable Cs-135 for nucleosynthesis and transmutation

Author

Patronis, N., Dababneh, S., Assimakopoulos, P. A., Gallino, R., Heil, M., Kappeler, F., Karamanis, D., Koehler, P. E., Mengoni, A., and Plag, R.

Subjects
ba-136, model, transmission measurements, rates, giant branch stars, cross-sections, s-process nucleosynthesis
Abstract

The neutron capture cross section of the unstable isotope Cs-135 was measured relative to that of gold by means of the activation method. The sample was produced by ion implantation in a high resolution mass separator and irradiated with quasimonoenergetic neutrons at 30 keV and 500 keV, using the Li-7(p,n)Be-7 reaction. An additional irradiation with thermal neutrons has been carried out for defining the sample mass and for measuring the half-life of Cs-136. The neutron capture cross sections were determined as 164+/-10 mb and 34.8+/-3.0 mb at 30 keV and 500 keV, respectively, and were used to normalize the theoretically derived cross section shape. Based on these data, refined statistical model calculations were performed to obtain the (n,gamma) cross sections of the short-lived isotopes Cs-134 and Cs-136 as well. Updated Maxwellian-averaged capture cross sections of all unstable Cs isotopes were calculated for a range of thermal energies characteristic of helium burning scenarios for an improved s-process analysis of the Xe-Cs-Ba region. Physical Review C

Published
2004

46. A low-mass neutron flux monitor for the n_TOF facility at CERN

Author

Mastinu, P.F. Abbondanno, U. Aerts, G. Alvarez, H. Andriamonje, S. Angelopoulos, A. Assimakopoulos, P. Bacri, C.O. Badurek, G. Baumann, P. Bečvář, F. Beer, H. Benlliure, J. Berthier, B. Berthomieux, E. Boffi, S. Borcea, C. Boscolo-Marchi, E. Bustreo, N. Calviño, P. Cano-Ott, D. Capote, R. Carlson, P. Cennini, P. Chepel, V. Chiaveri, E. Coceva, C. Colonna, N. Cortes, G. Cortina, D. Couture, A. Cox, J. Dababneh, S. Dahlfors, M. David, S. Dolfini, R. Domingo-Pardo, C. Duran, I. Eleftheriadis, C. Embid-Segura, M. Ferrant, L. Ferrari, A. Ferreira-Lourenco, L. Ferreira-Marques, R. Frais-Koelbl, H. Furman, W.I. Giomataris, Y. Goncalves, I.F. Gonzalez-Romero, E. Goverdovski, A. Gramegna, F. Griesmayer, E. Gunsing, F. Haight, R. Heil, M. Herrera-Martinez, A. Ioannides, K.G. Janeva, N. Jericha, E. Käppeler, F. Kadi, Y. Karamanis, D. Kelic, A. Ketlerov, V. Kitis, G. Koehler, P.E. Konovalov, V. Kossionides, E. Lacoste, V. Leeb, H. Lindote, A. Lopes, M.I. Loriggiola, M. Lozano, M. Lukic, S. Markov, S. Marigo, S. Marrone, S. Martinez-Val, J. Mengoni, A. Milazzo, P.M. Minguez, E. Molina-Coballes, A. Moreau, C. Neves, F. Oberhummer, H. O'Brien, S. Pancin, J. Papaevangelou, T. Paradela, C. Pavlik, A. Pavlopoulos, P. Perez-Parra, A. Perlado, J.M. Perrot, L. Peskov, V. Plag, R. Plompen, A. Plukis, A. Poch, A. Policarpo, A. Pretel, C. Quesada, J.M. Radici, M. Raman, S. Rapp, W. Rauscher, T. Reifarth, R. Rejmund, F. Rosetti, M. Rubbia, C. Rudolf, G. Rullhusen, P. Salgado, J. Savvidis, E. Soares, J.C. Stephan, C. Tagliente, G. Tain, J.L. Tapia, C. Tassan-Got, L. Tavora, L.M.N. Terlizzi, R. Terrani, M. Tsangas, N. Vannini, G. Vaz, P. Ventura, A. Villamarin-Fernandez, D. Vincente-Vincente, M. Vlachoudis, V. Vlastou, R. Voss, F. Wendler, H. Wiescher, M. Wisshak, K. Zanini, L.

Subjects
Physics::Instrumentation and Detectors, Astrophysics::High Energy Astrophysical Phenomena, Physics::Accelerator Physics, Nuclear Experiment
Abstract

A small-mass system has been developed for monitoring the flux of neutrons with energy up to 1 MeV at the new time-of-flight facility at CERN, n_TOF. The monitor is based on a thin Mylar foil with a 6Li deposit, placed in the neutron beam, and an array of Silicon detectors, placed outside the beam, for detecting the products of the 6Li(n, α)3H reaction. The small amount of material on the beam ensures a minimal perturbation of the flux and minimizes the background related to scattered neutrons. Moreover, a further reduction of the γ-ray background has been obtained by constructing the scattering chamber hosting the device in carbon fibre. A detailed description of the flux monitor is here presented, together with the characteristics of the device, in terms of efficiency, resolution and induced background. The use of the monitor in the measurement of neutron capture cross-sections at n-TOF is discussed.

Published
2004

47. A low-mass neutron flux monitor for the n_TOF facility at CERN

Author

Mastinu, Pf, Abbondanno, U., Aerts, G., Alvarez, H., Andriamonje, S., Angelopoulos, A., Assimakopoulos, P., Bacri, Co, Badurek, G., Baumann, P., Becvar, F., Beer, H., Benlliure, J., Berthier, B., Berthomieux, E., Boffi, S., Borcea, C., Boscolo-Marchi, E., Bustreo, N., Calvino, P., Cano-Ott, D., Capote, R., Carlson, P., Cennini, P., Chepel, V., Chiaveri, E., Coceva, C., Colonna, N., Cortes, G., Cortina, D., Couture, A., Cox, J., Dababneh, S., Dahlfors, M., David, S., Dolfini, R., Domingo-Pardo, C., Duran, I., Eleftheriadis, C., Embid-Segura, M., Ferrant, L., Ferrari, A., Ferreira-Lourenco, L., Ferreira-Marques, R., Frais-Koelbl, H., Furman, Wi, Giomataris, Y., Goncalves, If, Gonzalez-Romero, E., Goverdovski, A., Gramegna, F., Griesmayer, E., Gunsing, F., Haight, R., Heil, M., Herrera-Martinez, A., Ioannides, Kg, Janeva, N., Jericha, E., Kappeler, F., Kadi, Y., Karamanis, D., Kelic, A., Ketlerov, V., Kitis, G., Koehler, Pe, Konovalov, V., Kossionides, E., Lacoste, V., Leeb, H., Lindote, A., Lopes, Mi, Loriggiola, M., Lozano, M., Lukic, S., Markov, S., Marigo, S., Marrone, S., Martinez-Val, J., Mengoni, A., Milazzo, Pm, Minguez, E., Molina-Coballes, A., Moreau, C., Neves, F., Oberhummer, H., O Brien, S., Pancin, J., Papaevangelou, T., Paradela, C., Pavlik, A., Pavlopoulos, P., Perez-Parra, A., Perlado, Jm, Perrot, L., Peskov, V., Plag, R., Plompen, A., Plukis, A., Poch, A., Policarpo, A., Pretel, C., Quesada, Jm, Radici, M., Raman, S., Rapp, W., Rauscher, T., Reifarth, R., Rejmund, F., Rosetti, M., Rubbia, C., Rudolf, G., Rullhusen, P., Salgado, J., Savvidis, E., Soares, Jc, Stephan, C., Tagliente, G., Tain, Jl, Tapia, C., Tassan-Goth, L., Tavora, Lmn, Terlizzi, R., Terrani, M., Tsangas, N., Vannini, G., Vaz, P., Ventura, A., Villamarin-Fernandez, D., Vincente-Vincente, M., Vlachoudis, V., Vlastou, R., Voss, F., Wendler, H., Wiescher, M., Wisshak, K., Zanini, L., and nTOF Collaboration

Abstract

A small-mass system has been developed for monitoring the flux of neutrons with energy up to 1 MeV at the new time-of-flight facility at CERN, n_TOF. The monitor is based on a thin Mylar foil with a Li-6 deposit, placed in the neutron beam, and an array of Silicon detectors, placed outside the beam, for detecting the products of the Li-6(n, alpha)H-3 reaction. The small amount of material on the beam ensures a minimal perturbation of the flux and minimizes the background related to scattered neutrons. Moreover, a further reduction of the gamma-ray background has been obtained by constructing the scattering chamber hosting the device in carbon fibre. A detailed description of the flux monitor is here presented, together with the characteristics of the device, in terms of efficiency, resolution and induced background. The use of the monitor in the measurement of neutron capture cross-sections at n_TOF is discussed. Brazilian Journal of Physics

Published
2004

48. Production and isobaric separation of Ni-63 ions for determination of the Ni-62(n, gamma) Ni-63 reaction cross section at stellar temperatures

Author

Nassar, H., Chelberg, S., Paul, M., Dababneh, S., Heil, M., Kappeler, F., Plag, R., Ahmad, I., Greene, J. P., Henderson, D. J., Jiang, C. L., Pardo, R. C., Pennington, T., Rehm, K. E., Scott, R., Sinha, S., Tang, X., Vondrasek, R., Koivisto, H., Berkovits, D., Bettan, M., Reifarth, R., Collon, P., O'Brien, S., and Patronis, N.

Subjects
nucleosynthesis, capture, s-process
Abstract

Nuclear Physics A

Published
2004

49. Measurement of the n(-)TOF beam profile with a micromegas detector

Author

Pancin, J., Abbondanno, U., Aerts, G., Alvarez, H., Andriamonje, S., Angelopoulos, A., Assimakopoulos, P., Bacri, C. O., Badurek, G., Baumann, P., Becvar, F., Plukis, A., Poch, A., Policarpo, A., Pretel, C., Quesada, J., Radici, M., Raman, S., Rapp, W., Reifarth, R., Rejmund, F., Beer, H., Rosetti, M., Rubbia, C., Rudolf, G., Rullhusen, P., Salgado, J., Savvidis, E., Stephan, C., Tagliente, G., Tain, J., Tapia, C., Benlliure, J., Tassan-Got, L., Tavora, L., Terlizzi, R., Terrani, M., Tsangas, N., Vannini, G., Vaz, P., Ventura, A., Villamarin-Fernandez, D., Vincente-Vincente, M., Berthier, B., Vlachoudis, V., Vlastou, R., Voss, F., Wendler, H., Wiescher, M., Wisshak, K., Zanini, L., Berthoumieux, E., Boffi, S., Borcea, C., Boscolo-Marchi, E., Bustreo, N., Calvino, F., Cano-ott, D., Capote, R., Carlson, P., Cennini, P., Chepel, V., Chiaveri, E., Colonna, N., Cortes, G., Cortina, D., Couture, A., Cox, J., Dababneh, S., Dahlfors, M., David, S., Delbart, A., Derre, J., Dolfini, R., Domingo, C., Duran-Escribano, I., Eleftheriadis, C., Embid-Segura, M., Ferrant, L., Ferrari, A., Ferreira-Lourenco, L., Ferreiramarques, R., Frais-Koelbl, H., Furman, W., Giomataris, Y., Goncalves, I., Gonzalez-Romero, E., Goverdovski, A., Gramegna, F., Griesmayer, E., Gunsing, F., Haight, R., Heil, M., Herrera-Martinez, A., Ioannides, K., Janeva, N., Jeanneau, F., Jericha, E., Kappeler, F., Kadi, Y., Karamanis, D., Kelic, A., Ketlerov, V., Kitis, G., Koehler, P., Konovalov, V., Kossionides, E., Lacoste, V., Leeb, H., Lindote, A., Lopes, I., Lozano, M., Lukic, S., Markov, S., Marrone, S., Martinez-Val, J., Mastinu, P., Mengoni, A., Milazzo, P., Minguez, E., Molina-Coballes, A., Moreau, C., Neves, F., Oberhummer, H., O'brien, S., Papadopoulos, I., Papavengelou, T., Paradela, C., Pavlik, A., Pavlopoulos, P., Perez-Parra, A., Perlado, J., Peskov, V., Perrot, L., Plag, R., and Plompen, A.

Subjects
micromegas, n(-)tof, beam profile, gaseous detector, neutron beam profiler
Abstract

A Micromegas detector was used in the neutron Time-Of-Flight (n-TOF) facility at CERN to evaluate the spatial distribution of the neutron beam as a function of its kinetic energy. This was achieved over a large range of neutron energies by using two complementary processes: at low energy by capture of a neutron via the Li-6(n, alpha)t reaction, and at high energy by elastic scattering of neutrons on gas nuclei (argon + isobutane or helium + isobutane). Data are compared to Monte Carlo simulations and an analytic function fitting the beam profile has been calculated with a sufficient precision to use in neutron capture experiments at the n-TOF facility. (C) 2004 Elsevier B.V. All rights reserved. Nuclear Instruments & Methods in Physics Research Section a-Accelerators Spectrometers Detectors and Associated Equipment

Published
2004

50. New experimental validation of the pulse height weighting technique for capture cross-section measurements

Author

Abbondanno, U. Aerts, G. Alvarez, H. Andriamonje, S. Angelopoulos, A. Assimakopoulos, P. Bacri, C.O. Badurek, G. Baumann, P. Bečvář, F. Beer, H. Benlliure, J. Berthier, B. Berthomieux, E. Boffi, S. Borcea, C. Boscolo-Marchi, E. Bustreo, N. Calviño, P. Cano-Ott, D. Capote, R. Carlson, P. Cennini, P. Chepel, V. Chiaveri, E. Coceva, C. Colonna, N. Cortes, G. Cortina, D. Couture, A. Cox, J. Dababneh, S. Dahlfors, M. David, S. Dolfini, R. Domingo-Pardo, C. Duran, I. Eleftheriadis, C. Embid-Segura, M. Ferrant, L. Ferrari, A. Ferreira-Lourenco, L. Ferreira-Marques, R. Frais-Koelbl, H. Furman, W.I. Giomataris, Y. Goncalves, I.F. Gonzalez-Romero, E. Goverdovski, A. Gramegna, F. Griesmayer, E. Gunsing, F. Haight, R. Heil, M. Herrera-Martinez, A. Ioannides, K.G. Janeva, N. Jericha, E. Käppeler, F. Kadi, Y. Karamanis, D. Kelic, A. Ketlerov, V. Kitis, G. Koehler, P.E. Konovalov, V. Kossionides, E. Lacoste, V. Leeb, H. Lindote, A. Lopes, M.I. Lozano, M. Lukic, S. Markov, S. Marrone, S. Martinez-Val, J. Mastinu, P. Mengoni, A. Milazzo, P.M. Minguez, E. Molina-Coballes, A. Moreau, C. Neves, F. Oberhummer, H. O'Brien, S. Pancin, J. Papaevangelou, T. Paradela, C. Pavlik, A. Pavlopoulos, P. Perez-Parra, A. Perlado, J.M. Perrot, L. Peskov, V. Plag, R. Plompen, A. Plukis, A. Poch, A. Policarpo, A. Pretel, C. Quesada, J.M. Radici, M. Raman, S. Rapp, W. Rauscher, T. Reifarth, R. Rejmund, F. Rosetti, M. Rubbia, C. Rudolfh, G. Rullhusen, P. Salgado, J. Savvidis, E. Soares, J.C. Stephan, C. Tagliente, G. Tain, J.L. Tapia, C. Tassan-Got, L. Tavora, L.M.N. Terlizzi, R. Terrani, M. Tsangas, N. Vannini, G. Vaz, P. Ventura, A. Villamarin-Fernandez, D. Vincente-Vincente, M. Vlachoudis, V. Vlastou, R. Voss, F. Wendler, H. Wiescher, M. Wisshak, K. Zanini, L.

Abstract

The accuracy of the pulse height weighting technique for the determination of neutron capture cross-sections is investigated. The technique is applied to measurements performed with C6D6 liquid scintillation detectors of two different types using capture samples of various dimensions. The data for well-known (n,γ) resonances are analyzed using weighting functions obtained from Monte Carlo simulations of the experimental set-up. Several causes of systematic deviation are identified and their effect is quantified. In all the cases measured the reaction yield agrees with the standard value within 2%. © 2003 Elsevier B.V. All rights reserved.

Published
2004

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