Search

Your search keyword '"ROLFS C"' showing total 64 results
Start Over Author "ROLFS C" Language undetermined
64 results on '"ROLFS C"'

1. First measurement of the 14N(p,γ)15O cross section down to 70 keV

Author

Lemut, A., Bemmerer, D., Confortola, F., Bonetti, R., Broggini, C., Corvisiero, P., Costantini, H., Cruz, J., Formicola, A., Fülöp, Zs., Gervino, G., Guglielmetti, A., Gustavino, C., Gyürky, Gy., Imbriani, G., Jesus, A.P., Junker, M., Limata, B., Menegazzo, R., Prati, P., Roca, V., Rogalla, D., Rolfs, C., Romano, M., Rossi Alvarez, C., Schümann, F., Somorjai, E., Straniero, O., Strieder, F., Terrasi, F., and Trautvetter, H.P.

Subjects
Nuclear and High Energy Physics
Published
2006
Full Text
View/download PDF

2. The Au-198 beta(-)-half-life in the metal Au

Author

Spillane T, Raiola F, Zeng F, Becker HW, Kettner KU, Kunze R, Rolfs C, Romano M, Schurmann D, Strieder F., GIALANELLA, Lucio, Spillane, T, Raiola, F, Zeng, F, Becker, Hw, Gialanella, Lucio, Kettner, Ku, Kunze, R, Rolfs, C, Romano, M, Schurmann, D, and Strieder, F.

Abstract

For the beta(-)-decay of Au-198 in a Au metallic environment the half-life was observed to be longer by 0.4 +/- 0.7% at room temperature (T = 293K) and by 4.0 +/- 0.7% when the metal was cooled to T = 12 K, both compared to the literature value of T (1/2) = 2.6943 +/- 0.0008d.

Published
2007

3. Underground measurement of 14N(p, γ)15O astrophysical factor at low energy

Author

Confortola, F., Bemmerer, D., Costantini, H., Formicola, A., Gyurky, G. y., Bezzon, P., Bonetti, R., Broggini, C., Corvisiero, P., Elekes, Z., Fulop, Z., Gervino, Gianpiero, Guglielmetti, A., Gustavino, C., Imbriani, G., Junker, M., Laubenstein, M., Lemut, A., Limata, B., Lozza, V., Marta, M., Menegazzo, R., Prati, P., Roca, V., Rolfs, C., Rossi Alvarez, C., Somorjai, E., Straniero, O., Strieder, F., Terrasi, F., and Trautvetter, H. P.

Subjects
Physics, History, CNO cycle, Proton, Solar neutrino, nuclear astrophysics, Cosmic ray, Astrophysics, Computer Science Applications, Education, Nuclear physics, Nuclear astrophysics, Nuclear fusion, Neutrino, Nuclear Experiment, Borexino
Abstract

In stars, four hydrogen nuclei are converted into a helium nucleus by two competing nuclear fusion processes: the proton - proton chain (p-p) and the carbon - nitrogen - oxygen (CNO) cycle. At temperatures higher than 2 107 K, the CNO cycle dominates the energy production. In particular, its rate is determined by the slowest reaction: 14N(p, γ)15O. Direct measurement in a laboratory at the surface of the Earth is hampered by the background due to the cosmic rays. Here we report on an experiment performed with the LUNA (Laboratory for Underground Nuclear Astrophysics) accelerator placed deep underground in the Gran Sasso laboratory (Italy). Thanks to the cosmic ray suppression provided by the mountain shield, we could measure the 14N(p, γ)15O cross section for the first time directly at energies corresponding to stellar temperatures and with unprecedented accuracy. The results are strictly related to carbon stars formation, an independent lower limit on the age of the universe and solar neutrinos flux. The 13N and 15O neutrinos coming from the CNO cycle are strictly correlated to the 14N(p, γ)15O S-factor and their flux will play an important role in some future solar neutrino experiment, such as Borexino.

Published
2006
Full Text
View/download PDF

4. A new setup for the underground study of capture reactions

Author

CASELLA C, COSTANTINI H, LEMUT A, LIMATA B, BEMMERER D, BONETTI R, BROGGINI C, CAMPAJOLAL, COCCONI P, CORVISIERO P, CRUZ J, FORMICOLA A, FULOP S, GERVINO G, GIALANELLA L, GUGLIELMETTI A, GUSTAVINO C, GYURKY G, IMBRIANI G, JESUS A. P, JUNKER M, ORDINE A, PARODI F, PAROLIN M, PINTO J. V, PRATI P, RIBEIRO J. P, ROCA V, ROGALLA D, ROLFS C, ROMANO M, ROSSI ALVAREZ C, SCHUMANN F, SOMORJAI E, STRANIERO O, STRIEDER F, TERRASI, Filippo, TRAUTVETTER H. P, ZAVATARELLI S., D'ONOFRIO, Antonio, C., Casella, H., Costantini, A., Lemut, B., Limata, D. BEMMERER R., Bonetti, C., Broggini, L., Campajola, P., Cocconi, P., Corvisiero, J., Cruz, A., Donofrio, A., Formicola, Z., Flp, G., Gervino, L., Gialanella, A., Guglielmetti, C., Gustavino, G., Gyurky, A., Loiano, Imbriani, Gianluca, A. P., Jesu, M., Junker, P., Musico, A., Ordine, F., Parodi, M., Parolin, J. V., Pinto, P., Prati, J. P., Ribeiro, Roca, Vincenzo, D., Rogalla, C., Rolf, M., Romano, C. R., Alvarez, A., Rottura, F., Schmann, E., Somorjai, F., Strieder, F., Terrasi, H. P. TRAUTVETTER A. VOMIERO AND S., Zavatarelli, Romano, Mario, Casella, C, Costantini, H, Lemut, A, Limata, B, Bemmerer, D, Bonetti, R, Broggini, C, Campajolal, Cocconi, P, Corvisiero, P, Cruz, J, D'Onofrio, Antonio, Formicola, A, Fulop, S, Gervino, G, Gialanella, L, Guglielmetti, A, Gustavino, C, Gyurky, G, Imbriani, G, Jesus, A. P., Junker, M, Ordine, A, Parodi, F, Parolin, M, Pinto, J. V., Prati, P, Ribeiro, J. P., Roca, V, Rogalla, D, Rolfs, C, Romano, M, ROSSI ALVAREZ, C, Schumann, F, Somorjai, E, Straniero, O, Strieder, F, Terrasi, Filippo, Trautvetter, H. P., and Zavatarelli, S.

Published
2002

5. Direct measurement of the absolute cross section of p(Be-7, gamma)B-8

Author

TERRASI, Filippo, D'ONOFRIO, Antonio, LUBRITTO, Carmine, SABBARESE, Carlo, Gialanella L, Imbriani G, Strieder F, Campajola L, Greife U, Gyurky G, Ordine A, Roca V, Rolfs C, Romano M, Rogalla D, Somorjai E, Trautvetter HP, RI Gyurky Gyorgy/F 1078 2010, Terrasi, Filippo, Gialanella, L, Imbriani, G, Strieder, F, Campajola, L, D'Onofrio, Antonio, Greife, U, Gyurky, G, Lubritto, Carmine, Ordine, A, Roca, V, Rolfs, C, Romano, M, Rogalla, D, Sabbarese, Carlo, Somorjai, E, Trautvetter, Hp, and RI Gyurky Gyorgy/F 1078, 2010

Published
2001

6. Impact of a revised $^{25}$Mg(p,$��$)$^{26}$Al reaction rate on the operation of the Mg-Al cycle

Author

Straniero, O., Imbriani, G., Strieder, F., Bemmerer, D., Broggini, C., Caciolli, A., Corvisiero, P., Costantini, H., Cristallo, S., DiLeva, A., Formicola, A., Elekes, Z., F��l��p, Zs., Gervino, G., Guglielmetti, A., Gustavino, C., Gy��rky, Gy., Junker, M., Lemut, A., Limata, B., Marta, M., Mazzocchi, C., Menegazzo, R., Piersanti, L., Prati, P., Roca, V., Rolfs, C., Alvarez, C. Rossi, Somorjai, E., Terrasi, F., and Trautvetter, H. P.

Subjects
High Energy Astrophysical Phenomena (astro-ph.HE), Astrophysics of Galaxies (astro-ph.GA), FOS: Physical sciences, Nuclear Experiment (nucl-ex), Solar and Stellar Astrophysics (astro-ph.SR)
Abstract

Proton captures on Mg isotopes play an important role in the Mg-Al cycle active in stellar H-burning regions. In particular, low-energy nuclear resonances in the $^{25}$Mg(p,$��$)$^{26}$Al reaction affect the production of radioactive $^{26}$Al$^{gs}$ as well as the resulting Mg/Al abundance ratio. Reliable estimations of these quantities require precise measurements of the strengths of low-energy resonances. Based on a new experimental study performed at LUNA, we provide revised rates of the $^{25}$Mg(p,$��$)$^{26}$Al$^{gs}$ and the $^{25}$Mg(p,$��$)$^{26}$Al$^{m}$ reactions with corresponding uncertainties. In the temperature range 50 to 150 MK, the new recommended rate of the $^{26}$Al$^{m}$ production is up to 5 times higher than previously assumed. In addition, at T$=100$ MK, the revised total reaction rate is a factor of 2 higher. Note that this is the range of temperature at which the Mg-Al cycle operates in an H-burning zone. The effects of this revision are discussed. Due to the significantly larger $^{25}$Mg(p,$��$)$^{26}$Al$^{m}$ rate, the estimated production of $^{26}$Al$^{gs}$ in H-burning regions is less efficient than previously obtained. As a result, the new rates should imply a smaller contribution from Wolf-Rayet stars to the galactic $^{26}$Al budget. Similarly, we show that the AGB extra-mixing scenario does not appear able to explain the most extreme values of $^{26}$Al/$^{27}$Al, i.e. $>10^{-2}$, found in some O-rich presolar grains. Finally, the substantial increase of the total reaction rate makes the hypothesis of a self-pollution by massive AGBs a more robust explanation for the Mg-Al anticorrelation observed in Globular-Cluster stars.

Published
2012
Full Text
View/download PDF

7. The (14)N(p,gamma)(15)O reaction studied with a composite germanium detector RID B-2262-2008

Author

Marta, M, Formicola, A, Bemmerer, D, Broggini, C, Caciolli, A, Corvisiero, P, Costantini, H, Elekes, Z, Fulop, Z, Gervino, G, Guglielmetti, A, Gustavino, C, Gyurky, G, Imbriani, G, Junker, M, Lemut, A, Limata, B, Mazzocchi, C, Menegazzo, R, Prati, P, Roca, V, Rolfs, C, Alvarez, Cr, Somorjai, E, Straniero, O, Strieder, F, Terrasi, F, Trautvetter, Hp, and Vomiero, A

Published
2011

8. Revision of the (15)N(p, gamma)(16)O reaction rate and oxygen abundance in H-burning zones RID B-2262-2008

Author

Caciolli, A, Mazzocchi, C, Capogrosso, V, Bemmerer, D, Broggini, C, Corvisiero, P, Costantini, H, Elekes, Z, Formicola, A, Fulop, Z, Gervino, G, Guglielmetti, A, Gustavino, C, Gyurky, G, Imbriani, G, Junker, M, Lemut, A, Marta, M, Menegazzo, R, Palmerini, S, Prati, P, Roca, V, Rolfs, C, Alvarez, Cr, Somorjai, E, Straniero, O, Strieder, F, Terrasi, F, Trautvetter, Hp, and Vomiero, A

Published
2011

9. The 25Mg(p,g)Al reaction at low astrophysical energies

Author

Luna, Collaboration, Strieder, F., Limata, B., Formicola, A., Imbriani, G., Junker, M., Bemmerer, D., Best, A., Broggini, C., Caciolli, A., Corvisiero, P., Costantini, H., Dileva, A., Elekes, Z., Fülöp, Zs, Gervino, G., Guglielmetti, A., Gustavino, C., Gyürky, Gy, Lemut, A., Marta, M., Mazzocchi, C., Menegazzo, R., Prati, P., Roca, V., Rolfs, C., Rossi Alvarez, C., Somorjai, E., Oscar Straniero, Terrasi, F., and Trautvetter, H. P.

Subjects
Physics::Instrumentation and Detectors, Astrophysics::High Energy Astrophysical Phenomena, FOS: Physical sciences, High Energy Physics::Experiment, Nuclear Experiment (nucl-ex), Nuclear Experiment
Abstract

In the present work we report on a new measurement of resonance strengths in the reaction 25Mg(p,gamma)26Al at E_cm= 92 and 189 keV. This study was performed at the LUNA facility in the Gran Sasso underground laboratory using a 4pi BGO summing crystal. For the first time the 92 keV resonance was directly observed and a resonance strength omega-gamma=(2.9+/-0.6)x10E-10 eV was determined. Additionally, the gamma-ray branchings and strength of the 189 keV resonance were studied with a high resolution HPGe detector yielding an omega-gamma value in agreement with the BGO measurement, but 20% larger compared to previous works., Comment: 6 pages, 4 figures, accepted for publication in Physics Letters B

Published
2011
Full Text
View/download PDF

10. Revision of the 15N(p,��)16O reaction rate and oxygen abundance in H-burning zones

Author

Caciolli, A., Mazzocchi, C., Capogrosso, V., Bemmerer, D., Broggini, C., Corvisiero, P., Costantini, H., Elekes, Z., Formicola, A., Fulop, Zs., Gervino, G., Guglielmetti, A., Gustavino, C., Gyurky, Gy., Imbriani, G., Junker, M., Lemut, A., Marta, M., Menegazzo, R., Palmerini, S., Prati, P., Roca, V., Rolfs, C., Alvarez, C. Rossi, Somorjai, E., Straniero, O., Strieder, F., Terrasi, F., Trautvetter, H. P., and Vomiero, A.

Subjects
FOS: Physical sciences, Nuclear Experiment (nucl-ex), Solar and Stellar Astrophysics (astro-ph.SR)
Abstract

The NO cycle takes place in the deepest layer of a H-burning core or shell, when the temperature exceeds T {\simeq} 30 {\cdot} 106 K. The O depletion observed in some globular cluster giant stars, always associated with a Na enhancement, may be due to either a deep mixing during the RGB (red giant branch) phase of the star or to the pollution of the primordial gas by an early population of massive AGB (asymptotic giant branch) stars, whose chemical composition was modified by the hot bottom burning. In both cases, the NO cycle is responsible for the O depletion. The activation of this cycle depends on the rate of the 15N(p,��)16O reaction. A precise evaluation of this reaction rate at temperatures as low as experienced in H-burning zones in stellar interiors is mandatory to understand the observed O abundances. We present a new measurement of the 15N(p,��)16O reaction performed at LUNA covering for the first time the center of mass energy range 70-370 keV, which corresponds to stellar temperatures between 65 {\cdot} 106 K and 780 {\cdot}106 K. This range includes the 15N(p,��)16O Gamow-peak energy of explosive H-burning taking place in the external layer of a nova and the one of the hot bottom burning (HBB) nucleosynthesis occurring in massive AGB stars. With the present data, we are also able to confirm the result of the previous R-matrix extrapolation. In particular, in the temperature range of astrophysical interest, the new rate is about a factor of 2 smaller than reported in the widely adopted compilation of reaction rates (NACRE or CF88) and the uncertainty is now reduced down to the 10% level., 6 pages, 5 figures

Published
2011
Full Text
View/download PDF

12. Excitation of compound states in subsystems as an indirect tool in nuclear astrophysics. The theory of the Trojan Horse method

Author

Mukhamedzhanov, A. M., CLAUDIO SPITALERI, Rolfs, C., and Pizzone, Rg

Subjects
Nuclear physics, Nuclear reaction, Physics, Giant resonance, Astrophysics::Instrumentation and Methods for Astrophysics, Nuclear astrophysics, Coulomb blockade, Nuclear binding energy, Trojan horse, Coulomb barrier, Resonance (particle physics)
Abstract

Astrophysical reactions proceeding through compound states represent one of the crucial part of nuclear astrophysics. However, due to the presence of the Coulomb barrier, it is often very difficult or even impossible to obtain the astrophysical S(E) factor from measurements in the laboratory at astrophysically relevant energies. The Trojan Horse method (THM) provides a unique tool to obtain the information about resonant astrophysical reactions at astrophysical energies. Here the theory and application of the THM for the resonant reactions is addressed.

Published
2010
Full Text
View/download PDF

13. Recoil separator ERNA: ion beam specifications

Author

Rogalla D, Aliotta M, Barnes CA, Campajola L, D'ONOFRIO, Antonio, Fritz E, Gialanella L, Greife U, Imbriani G, Ordine A, Ossmann J, Roca V, Rolfs C, Romano M, Schurmann D, Schumann F, Strieder F, Theis S, TERRASI, Filippo, Trautvetter HP, RI Aliotta Marialuisa /H 2567 2012, SABBARESE, Carlo, Rogalla, D, Aliotta, M, Barnes, Ca, Campajola, L, D'Onofrio, Antonio, Fritz, E, Gialanella, L, Greife, U, Imbriani, G, Ordine, A, Ossmann, J, Roca, V, Rolfs, C, Romano, M, Sabbarese, Carlo, Schurmann, D, Schumann, F, Strieder, F, Theis, S, Terrasi, Filippo, Trautvetter, Hp, and RI Aliotta Marialuisa /H 2567, 2012

Published
1999

14. The 3He(alpha,gamma)7Be S-factor at solar energies: the prompt gamma experiment at LUNA

Author

Costantini, H., Bemmerer, D., Confortola, F., Formicola, A., Gyürky, G., Bezzon, P., Bonetti, R., Broggini, C., Corvisiero, P., Elekes, Z., Fülöp, Z., Gervino, G., Guglielmetti, A., Gustavino, C., Imbriani, G., Junker, M., Laubenstein, M., Lemut, A., Limata, B., Lozza, V., Marta, M., Menegazzo, R., Prati, P., Roca, V., Rolfs, C., Rossi Alvarez, C., Somorjai, E., Straniero, O., Strieder, F., Terrasi, F., and Trautvetter, H. P.

Subjects
FOS: Physical sciences, Nuclear Experiment (nucl-ex), Nuclear Experiment
Abstract

The 3He(alpha,gamma)7Be process is a key reaction in both Big-Bang nucleosynthesis and p-p chain of Hydrogen Burning in Stars. A new measurement of the 3He(alpha,gamma)7Be cross section has been performed at the INFN Gran Sasso underground laboratory by both the activation and the prompt gamma detection methods. The present work reports full details of the prompt gamma detection experiment, focusing on the determination of the systematic uncertainty. The final data, including activation measurements at LUNA, are compared with the results of the last generation experiments and two different theoretical models are used to obtain the S-factor at solar energies., Comment: Accepted for publication in Nucl. Phys. A

Published
2008
Full Text
View/download PDF

15. Ground state capture in $^{14}$N(p,$��$)$^{15}$O studied above the 259 keV resonance at LUNA

Author

Trautvetter, H. P., Bemmerer, D., Bonetti, R., Broggini, C., Caciolli, A., Confortola, F., Corvisiero, P., Costantini, H., Elekes, Z., Formicola, A., Fulop, Zs., Gervino, G., Guglielmetti, A., Gyurky, Gy., Gustavino, C., Imbriani, G., Junker, M., Lemut, A., Limata, B., Marta, M., Mazzocchi, C., Menegazzo, R., Prati, P., Roca, V., Rolfs, C., Alvarez, C. Rossi, Somorjai, E., Straniero, O., Strieder, F., Terrasi, F., Vezzu, S., and Vomiero, A.

Subjects
Astrophysics::High Energy Astrophysical Phenomena, FOS: Physical sciences, Nuclear Experiment (nucl-ex)
Abstract

We report on a new measurement of $^{14}$N(p,$��$)$^{15}$O for the ground state capture transition at $E_p$ = 360, 380 and 400 keV, using the 400 kV LUNA accelerator. The true coincidence summing effect --the major source of error in the ground state capture determination-- has been significantly reduced by using a Clover--type gamma detector., 6 pages, 5 figures, Accepted for publication in Journal of Physics G

Published
2007
Full Text
View/download PDF

16. Astrophysical S-factor of the 3He(alpha,gamma)7Be reaction measured at low energy via prompt and delayed gamma detection

Author

Confortola, F., Bemmerer, D., Costantini, H., Formicola, A., Gyürky, Gy., Bezzon, P., Bonetti, R., Broggini, C., Corvisiero, P., Elekes, Z., Fülöp, Zs., Gervino, G., Guglielmetti, A., Gustavino, C., Imbriani, G., Junker, M., Laubenstein, M., Lemut, A., Limata, B., Lozza, V., Marta, M., Menegazzo, R., Prati, P., Roca, V., Rolfs, C., Alvarez, C. Rossi, Somorjai, E., Straniero, O., Strieder, F., Terrasi, F., and Trautvetter, H. P.

Subjects
Astrophysics::High Energy Astrophysical Phenomena, Astrophysics (astro-ph), FOS: Physical sciences, High Energy Physics::Experiment, Nuclear Experiment (nucl-ex), Astrophysics, Nuclear Experiment
Abstract

Solar neutrino fluxes depend both on astrophysical and on nuclear physics inputs, namely on the cross sections of the reactions responsible for neutrino production inside the Solar core. While the flux of solar 8B neutrinos has been recently measured at Superkamiokande with a 3.5% uncertainty and a precise measurement of 7Be neutrino flux is foreseen in the next future, the predicted fluxes are still affected by larger errors. The largest nuclear physics uncertainty to determine the fluxes of 8B and 7Be neutrinos comes from the 3He(alpha,gamma)7Be reaction. The uncertainty on its S-factor is due to an average discrepancy in results obtained using two different experimental approaches: the detection of the delayed gamma rays from 7Be decay and the measurement of the prompt gamma emission. Here we report on a new high precision experiment performed with both techniques at the same time. Thanks to the low background conditions of the Gran Sasso LUNA accelerator facility, the cross section has been measured at Ecm = 170, 106 and 93 keV, the latter being the lowest interaction energy ever reached. The S-factors from the two methods do not show any discrepancy within the experimental errors. An extrapolated S(0)= 0.560+/-0.017 keV barn is obtained. Moreover, branching ratios between the two prompt gamma-transitions have been measured with 5-8% accuracy., Comment: to be published in Physical Review C

Published
2007
Full Text
View/download PDF

20. Study of the He-3(d, p)He-4 reaction through the Trojan Horse Method

Author

La Cognata, M, Musumarra, Agatino, Spitaleri, C, Tumino, A, Bonomo, C, Cherubini, Silvio, Figuera, P, Lamia, Livio, Pellegriti, Mg, Rinollo, A, Pizzone, Rg, Rolfs, C, Romano, Stefano, Schurmann, D, Strieder, F, Tudisco, Salvatore, and Typel, S.

Published
2005

21. The bottleneck of the CNO burning and the age of the Globular Clusters

Author

Imbriani, G., Costantini, H., Formicola, A., Bemmerer, D., Bonetti, R., Broggini, C., Corvisiero, P., Cruz, J., Fulop, Z., Gervino, G., Guglielmetti, A., Gustavino, C., Gyurky, G., Jesus, A. P., Junker, M., Lemut, A., Menegazzo, R., Prati, P., Roca, V., Rolfs, C., Romano, M., Alvarez, C. Rossi, Schumann, F., Somorjai, E., Straniero, O., Strieder, F., Terrasi, F., Trautvetter, H. P., Vomiero, A., and Zavatarelli, S.

Subjects
Astrophysics (astro-ph), Astrophysics::Solar and Stellar Astrophysics, FOS: Physical sciences, Astrophysics::Cosmology and Extragalactic Astrophysics, Astrophysics, Astrophysics::Galaxy Astrophysics
Abstract

The transition between the Main Sequence and the Red Giant Branch in low mass stars is powered by the onset of the CNO burning, whose bottleneck is the $^{14}$N(p,$\gamma)^{15}$O. The LUNA collaboration has recently improved the low energy measurements of the cross section of this key reaction. We analyse the impact of the revised reaction rate on the estimate of the Globular Clusters ages, as derived from the turnoff luminosity. We found that the age of the oldest Globulars should be increased by about 0.7-1 Gyr with respect to the current estimates., Comment: Accepted

Published
2004
Full Text
View/download PDF

22. Cross-section of Li-8(alpha, n)B-11: Inhomogeneous Big Bang nucleosynthesis

Author

Cherubini, Silvio, Figuera, P, Musumarra, Agatino, Agodi, C, Alba, R, Calabretta, L, Cosentino, L, Del Zoppo, A, Di Pietro, A, La Cognata, M, Lamia, Livio, Pappalardo, L, Pellegriti, Mg, Pizzone, Rg, Rinollo, A, Rolfs, C, Romano, Stefano, Spitaleri, C, Strieder, F, Tudisco, Salvatore, Tumino, A, and RI Tumino Aurora/I 3941 2012

Published
2004

29. Stopping power, electron screening and the astrophysical S(E) factor of d(3He,p)4He'

Author

Costantini, Heide, Formicola, A., Junker, M., Bonetti, R., Broggini, C., Campajola, L., Corvisiero, Pietro, D'Onofrio, A., Gervino, G., Gialanella, L., Greife, U., Guglielmetti, A., Gustavino, C., Imbriani, G., Ordine, A., Prati, Paolo, Roca, V., Rogalla, D., Rolfs, C., Romano, M., Schmann, F., Strieder, F., Terrasi, F., Trautvetter, H. P., Zavatarelli, Sandra, H., Costantini, A. FORMICOLA M., Junker, R., Bonetti, C., Broggini, L., Campajola, P., Corvisiero, A., D'Onofrio, G., Gervino, L., Gialanella, U., Greife, A., Guglielmetti, C., Gustavino, Imbriani, Gianluca, A., Ordine, P., Prati, Roca, Vincenzo, D., Rogalla, C., Rolf, Romano, Mario, F., Schueman, O., Straniero, F., Strieder, F., Terrasi, H. P., Trautvetter, and S., Zavatarelli

Published
2000

31. First Measurement of the He3+He3-->He4+2p Cross Section down to the Lower Edge of the Solar Gamow Peak

Author

The LUNA Collaboration, Bonetti, R., Broggini, C., Campajola, L., Corvisiero, P., D'Alessandro, A., Dessalvi, M., D'Onofrio, A., Fubini, A., Gervino, G., Gialanella, L., Greife, U., Guglielmetti, A., Gustavino, C., Imbriani, G., Junker, M., Prati, P., Roca, V., Rolfs, C., Romano, M., Schuemann, F., Strieder, F., Terrasi, F., Trautvetter, H. P., and Zavatarelli, S.

Subjects
Physics::Instrumentation and Detectors, Astrophysics::High Energy Astrophysical Phenomena, Nuclear Theory, FOS: Physical sciences, High Energy Physics::Experiment, Nuclear Experiment (nucl-ex), Nuclear Experiment
Abstract

We give the LUNA results on the cross section measurement of a key reaction of the proton-proton chain strongly affecting the calculated neutrino luminosity from the Sun: He3+He3-->He4+2p. Due to the cosmic ray suppression provided by the Gran Sasso underground laboratory it has been possible to measure the cross section down to the lower edge of the solar Gamow peak, i.e. as low as 16.5 keV centre of mass energy. The data clearly show the cross section increase due to the electron screening effect but they do not exhibit any evidence for a narrow resonance suggested to explain the observed solar neutrino flux., 5 pages, RevTeX, and 2 figures in PostScript Submitted for publication

Published
1999
Full Text
View/download PDF

32. Laboratory for underground nuclear astrophysics(LUNA)

Author

Greife, U., Arpesella, C., Barnes, C. A., Bartolucci, F, Bellotti, E., Broggini, C., Corvisiero, P., Fiorentini, G., Fubini, A., Gervino, G., Gorris, F., Gustavino, C., Junker, M., Kavanagh, R. W., Lanza, A., Mezzorani, G., Prati, P., Quarati, Piero, Rodney, W. S., Rolfs, C., Schulte, W. E., Trautvetter, H. P., and Zahnow, D.

Published
1994

33. The alpha-C-12 scattering studied via the Trojan-Horse method

Author

CLAUDIO SPITALERI, Aliotta, M., Figuera, P., Lattuada, M., Pizzone, Rg, Romano, S., Tumino, A., Rolfs, C., Gialanella, L., Strieder, F., Cherubini, S., Musumarra, A., Miljanic, D., Typel, S., Wolter, Hh, Spitaleri, C, Aliotta, M, Figuera, P, Lattuada, M, Pizzone, Rg, Romano, S, Tumino, A, Rolfs, C, Gialanella, Lucio, Strieder, F, Cherubini, S, Musumarra, A, Miljanic, D, Typel, S, and Wolter, Hh

34. Applications of accelerator mass spectrometry to nuclear astrophysics

Author

Gialanella, L., Brand, K., Campajola, L., D Onofrio, A., Greife, U., Huttel, E., Ordine, A., Roca, V., Rolfs, C., Romano, M., Romoli, M., Schmidt, S., Schulte, W. H., Strieder, F., Filippo Terrasi, Trautvetter, H. P., Zahnow, D., Gialanella, L., Brand, K., Campajola, L., D'Onofrio, Antonio, Greife, U., Huttel, F., Ordine, A., Roca, V., Rolfs, C., Romano, M., Romoli, M., Schmidt, S., Schulte, W. H., Strieder, F., Terrasi, Filippo, Trauttvetter, H. P., and Zahnow, D.

35. Study of the BBN reaction D(α,γ)6Li deep underground at LUNA

Author

Erhard, M., Anders, M., Bellini, A., Bemmerer, D., Broggini, C., Caciolli, A., Corvisiero, P., Costantini, H., Elekes, Z., Formicola, A., Fülöp, Z., Gervino, G., Guglielmetti, A., Gustavino, C., Gyürky, G., Imbriani, G., Junker, M., Laubenstein, M., Lemut, A., Marta, M., Mazzocchi, C., Menegazzo, R., Prati, P., Rocca, V., Rolfs, C., Rossi Alvarez, C., Somorjai, E., Oscar Straniero, Strieder, F., Szücs, T., Terrasi, F., and Trautvetter, H. P.

36. Trojan Horse Method: Recent experiments

Author

Cherubini, S., CLAUDIO SPITALERI, Crucilla, V., Gulino, M., La Cognata, M., Lamia, L., Pizzone, R. G., Romano, S., Tudisco, S., Tumino, A., Mukhamedzhanov, A., Trache, L., Tribble, R., Rolfs, C., Typel, S., Kubono, S., Aoki, W., Kajino, T., Motobayashi, T., and Nomoto, K.

37. Few-body problems in nuclear astrophysics

Author

Mukhamedzhanov, Am, Pirlepesov, F., Tribble, Re, Alt, Eo, Blokhintsev, Ld, Cherubini, S., Musumarra, A., Maria Grazia Pellegriti, Romano, S., Spitaleri, C., Tumino, A., Irgaziev, Bf, Kadyrov, As, Miljanic, D., Rolfs, C., Timofeyuo, Nk, Kalantarnayestanaki, N., Timmermans, Rge, and Bakker, Blg

40. Low energy underground study of N-14(p,gamma)O-15 cross section

Author

Lemut, A., Confortola, F., Bemmerer, D., Bonetti, R., Broggini, C., Corvisiero, P., Costantini, H., Joao Cruz, Formicola, A., Fulop, Zs, Gervino, G., Guglielmetti, A., Gustavino, C., Gy Rky, G., Imbriani, G., Jesus, A. P., Junker, M., Limata, B., Menegazzo, R., Prati, P., Roca, V., Rolfs, C., Rogalla, D., Romano, M., Alvarez, C. Rossi, Schuemann, E., Somorjai, E., Straniero, O., Strieder, F., Terrasi, F., and Trautvetter, H. P.

43. Nuclear astrophysics at LUNA: Status and perspectives

Author

Prati, P., Bemmerer, D., Bonetti, R., Broggini, C., Corvisiero, P., Confortola, F., Conti, E., Costantini, H., Elekes, Z., Formicola, A., Fulop, Z., Gervino, G., Alessandra Guglielmetti, Gyurky, G., Gustavino, C., Imbriani, G., Junker, M., Lemut, A., Limata, B., Marta, M., Mazzocchi, C., Menegazzo, R., Roca, V., Rolfs, C., Alvarez, C. R., Somorjai, E., Straniero, O., Strieder, F., Terrasi, F., Trautvetter, H. P., and Lung Collaboration

48. Recent results on the 11B(p,α)8Be reaction studied through the THM: S(E)-factor and electron screening measurements

Author

Lamia, L., Spitaleri, C., Cherubini, S., Crucillà, V., Gulino, M., Marco La Cognata, Pizzone, R. G., Puglia, S. M. R., Rapisarda, G. G., Romano, S., Sergi, M. L., Tumino, A., Burjan, V., Hons, Z., Kroha, V., Mrazek, J., Carlin, N., Munhoz, M. G., Del Santo, M. G., Souza, F. A., Toledo, A. S., Kubono, S., Wakabayashi, Y., Yamaguchi, H., Kiss, G. G., Somorjai, E., Li, C., Wen, Q., Zhou, S. -H, Mukhamedzhanoz, A., Tabacaru, G., and Rolfs, C.

50. 7Be radioactive beam production at CIRCE and its utilization in basic and applied physics

Author

Antonio D'Onofrio, Michele Russo, Filippo Terrasi, Benedicta Normanna Limata, E. Somorjai, Gyuri Gyürky, Mario R. Romano, Nicola De Cesare, Lucio Gialanella, Detlef Rogalla, Cesare Rossi, C. Rolfs, Antonino Di Leva, Limata, Bn, Gialanella, Lucio, Di Leva, A, De Cesare, N, D'Onofrio, Antonio, Gyurky, G, Rolfs, C, Romano, M, Rogalla, D, Rossi, C, Russo, M, Somorjai, E, Terrasi, Filippo, Limata, BENEDICTA NORMANNA, Lucio, Gialanella, DI LEVA, Antonino, Nicola De Cesare Antonio, D’Onofrio, G., Gyurky, Claus, Rolf, Romano, Mario, Detlef, Rogalla, Rossi, Cesare, Russo, Michele, Endre, Somorjai, and Filippo, Terrasi

Subjects
Nuclear and High Energy Physics, Applied physics, Ion beam, Chemistry, Nuclear engineering, Electron, Be production, Cathode, law.invention, Characterization (materials science), Pelletron, Nuclear physics, Ion implantation, law, Instrumentation, Beam (structure)
Abstract

A pure 7 Be beam with an energy E = 1–8 MeV is available for nuclear and applied physics at the 3 MV Pelletron tandem accelerator CIRCE in Caserta. The beam is produced using an offline technique. Typical analyzed beam intensities are about 2 ppA, using cathodes with an activity of the order of 200 MBq. The 7 Be implantation has been used for both fundamental nuclear physics and applied physics. In particular, different metals have been implanted with 7 Be in order to study the influence of the chemical composition and of the number of quasi-free electrons of the host material on the 7 Be half-life. In the field of applied physics, the 7 Be implantation turns out to be very interesting for wear measurement. In fact, in this case 7 Be is used as a depth-sensitive tracer. The continuous detection of the sample activity during the wear allows a high sensitivity measurement of wearing speed. The 7 Be beam production at CIRCE, the implantation procedure and the results obtained from the 7 Be half-life measurements and the wear characterization of implanted steel samples are described.

Published
2008
Full Text
View/download PDF

Catalog

Books, media, physical & digital resources
See catalog results