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383 results on '"Courtin, S."'

2. Study of N=50Z=3282 gap evolution around N=50Z=3282: new structure information for N=50Z=3282Ge

Author

Thisse, D., Lebois, M., Verney, D., Wilson, J. N., Jovančević, N., Rudigier, M., Canavan, R., Etasse, D., Adsley, P., Algora, A., Babo, M., Belvedere, K., Benito, J., Benzoni, G., Blazhev, A., Boso, A., Bottoni, S., Bunce, M., Chakma, R., Cieplicka-Oryńczak, N., Courtin, S., Cortés, M. L., Davies, P., Delafosse, C., Fallot, M., Fornal, B., Fraile, L., Gjestvang, D., Gottardo, A., Guadilla, V., Gerst, R. -B., Häfner, G., Hauschild, K., Heine, M., Henrich, C., Homm, I., Hommet, J., Ibrahim, F., Iskra, Ł. W., Ivanov, P., Jazrawi, S., Korgul, A., Koseoglou, P., Kröll, T., Kurtukian-Nieto, T., Meur, L. Le, Leoni, S., Ljungvall, J., Lopez-Martens, A., Lozeva, R., Matea, I., Miernik, K., Nemer, J., Oberstedt, S., Paulsen, W., Piersa-Silkowska, M., Poklepa, W., Popovitch, Y., Porzio, C., Qi, L., Ralet, D., Regan, P. H., Reygadas-Tello, D., Rezynkina, K., Sánchez-Tembleque, V., Siem, S., Schmitt, C., Söderström, P. -A., Solak, K., Sürder, C., Tocabens, G., Vedia, V., Warr, N., Wasilewska, B., Wiederhold, J., Yavahchova, M., Zeiser, F., and Ziliani, S.

Published
2023
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3. Navigating Disease-Modifying Treatments for Alzheimer's Disease: Focusing on Medications in Phase 3 Clinical Trials

Author

Brandt, Nicole J., Wheeler, Carrie, and Courtin, S. Orion

Subjects
Alzheimer's disease -- Drug therapy, Anticonvulsants -- Testing -- Comparative analysis, Monoclonal antibodies -- Testing -- Comparative analysis, Physiology, Pathological -- Methods, Health, Seniors
Abstract

Over the past 18 months, there has been scrutiny and controversy over the U.S. Food and Drug Administration's accelerated approval of aducanumab, a novel monoclonal antibody to treat Alzheimer's disease and prevent disease progression. As clinicians, educators, and advocates for our patients and caregivers impacted daily by this debilitating illness, this approval reinforces the need to maintain vigilance and awareness about emerging agents. The intent of the current article is to highlight some of the medications in Phase 3 clinical trials and share resources and updates on disease-modifying agents and their unique pharmacology. [Journal of Gerontological Nursing, 49(1), 6–10.], Alzheimer's disease (AD) is the most common cause of dementia in the United States and worldwide. It is estimated that 6.5 million Americans aged ≥65 years have dementia due to [...]

Published
2023
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4. Angular momentum generation in nuclear fission

Author

Wilson, J. N., Thisse, D., Lebois, M., Jovančević, N., Gjestvang, D., Canavan, R., Rudigier, M., Étasse, D., Gerst, R-B., Gaudefroy, L., Adamska, E., Adsley, P., Algora, A., Babo, M., Belvedere, K., Benito, J., Benzoni, G., Blazhev, A., Boso, A., Bottoni, S., Bunce, M., Chakma, R., Cieplicka-Oryńczak, N., Courtin, S., Cortés, M. L., Davies, P., Delafosse, C., Fallot, M., Fornal, B., Fraile, L., Gottardo, A., Guadilla, V., Häfner, G., Hauschild, K., Heine, M., Henrich, C., Homm, I., Ibrahim, F., Iskra, Ł. W., Ivanov, P., Jazrawi, S., Korgul, A., Koseoglou, P., Kröll, T., Kurtukian-Nieto, T., Le Meur, L., Leoni, S., Ljungvall, J., Lopez-Martens, A., Lozeva, R., Matea, I., Miernik, K., Nemer, J., Oberstedt, S., Paulsen, W., Piersa, M., Popovitch, Y., Porzio, C., Qi, L., Ralet, D., Regan, P. H., Rezynkina, K., Sánchez-Tembleque, V., Siem, S., Schmitt, C., Söderström, P.-A., Sürder, C., Tocabens, G., Vedia, V., Verney, D., Warr, N., Wasilewska, B., Wiederhold, J., Yavahchova, M., Zeiser, F., and Ziliani, S.

Published
2021
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5. A new 12C+12C reaction rate: Impact on stellar evolution

Author

Monpribat E., Choplin A., Martinet S., Courtin S., Heine M., Adsley P., Curien D., Dumont T., Ekström S., Jenkins D.G., Moukaddam M., Nippert J., Tsiatsiou S., and Meynet G.

Subjects
Physics, QC1-999
Abstract

Among the reactions driving stellar evolution during carbon burning, 12C + 12C fusion provides the key ingredients. This system reveals many resonances, but also regions with suppressed fusion cross-sections. The reaction was recently measured by the STELLA collaboration utilizing the gammaparticle coincidence technique for precise cross-section measurements reaching down to the Gamow window of massive stars. From the experimental data, reaction rates were determined by approximating a hindrance parametrization and by adding on top a resonance at the lowest measured energy. The impact of these reaction rates on the evolution of massive stars was explored with models of 12 and 25 M⊙ using the stellar evolution code GENEC, and a detailed study of the resulting nucleosynthesis with a 1454 elements network was performed. The sensitivity of the STELLA experimental cross-sections on the temperature range for C-burning for the stellar models studied were presented. The final abundances and their impacts on stellar evolution were discussed.

Published
2023
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8. Direct Measurement of Carbon Fusion at Astrophysical Energies with Gamma-Particle Coincidences

Author

Heine M., Fruet G., Courtin S., Jenkins D.G., Adsley P., Brown A., Canavan R., Catford W.N., Charon E., Curien D., Della Negra S., Duprat J., Hammache F., Lesrel J., Lotay G., Meyer A., Monpribat E., Montanari D., Morris L., Moukaddam M., Nippert J., Podolyák Zs., Regan P.H., Ribaud I., Richer M., Rudigier M., Shearman R., de Séréville N., and Stodel C.

Subjects
Physics, QC1-999
Abstract

We present 12C+12C direct fusion measurements with STELLA UKFATIMA, that reach into the region of astrophysics interest relevant to massive stars (M⊙ ≈ 25) using self-supporting thin rotating carbon foils [1]. We demonstrate that detecting gammas and light charged particles in coincidence with nanosecond timing is key for effective background reduction achieving reliable measurements in the sub-nanobarn range. We give details about core developments of the detection apparatus as well as the coincidence-analysis procedure of low count statistics. The present data largely follows the phenomenological hindrance interpolation and shows indication for resonant behaviour at the lowest energy explored.

Published
2022
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11. Extending the Hoyle-State Paradigm to C 12 + C 12 Fusion

Author

Adsley, P., Heine, M., Jenkins, D. G., Courtin, S., Neveling, R., Brümmer, J. W., Donaldson, L. M., Kheswa, N. Y., Li, K. C.W., Marín-Lámbarri, D. J., Mabika, P. Z., Papka, P., Pellegri, L., Pesudo, V., Rebeiro, B., Smit, F. D., and Yahia-Cherif, W.

Abstract

Carbon burning is a key step in the evolution of massive stars, Type 1a supernovae and superbursts in x-ray binary systems. Determining the C12+C12 fusion cross section at relevant energies by extrapolation of direct measurements is challenging due to resonances at and below the Coulomb barrier. A study of the Mg24(α,α′)Mg24 reaction has identified several 0+ states in Mg24, close to the C12+C12 threshold, which predominantly decay to Ne20(ground state)+α. These states were not observed in Ne20(α,α0)Ne20 resonance scattering suggesting that they may have a dominant C12+C12 cluster structure. Given the very low angular momentum associated with sub-barrier fusion, these states may play a decisive role in C12+C12 fusion in analogy to the Hoyle state in helium burning. We present estimates of updated C12+C12 fusion reaction rates.

Published
2022

12. A new 12C+12C reaction rate: Impact on stellar evolution.

Author

Monpribat, E., Choplin, A., Martinet, S., Courtin, S., Heine, M., Adsley, P., Curien, D., Dumont, T., Ekström, S., Jenkins, D.G., Moukaddam, M., Nippert, J., Tsiatsiou, S., and Meynet, G.

Subjects
CARBON, NEUTRON capture, NUCLEAR fusion, ASTROPHYSICS, NUCLEOSYNTHESIS
Abstract

Among the reactions driving stellar evolution during carbon burning, 12C + 12C fusion provides the key ingredients. This system reveals many resonances, but also regions with suppressed fusion cross-sections. The reaction was recently measured by the STELLA collaboration utilizing the gammaparticle coincidence technique for precise cross-section measurements reaching down to the Gamow window of massive stars. From the experimental data, reaction rates were determined by approximating a hindrance parametrization and by adding on top a resonance at the lowest measured energy. The impact of these reaction rates on the evolution of massive stars was explored with models of 12 and 25 M⊙ using the stellar evolution code GENEC, and a detailed study of the resulting nucleosynthesis with a 1454 elements network was performed. The sensitivity of the STELLA experimental cross-sections on the temperature range for C-burning for the stellar models studied were presented. The final abundances and their impacts on stellar evolution were discussed. [ABSTRACT FROM AUTHOR]

Published
2023
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15. Fusion hindrance and quasi-fission in 48Ca induced reactions : Implications for super-heavy element production

Author

Trotta, M., Stefanini, A. M., Beghini, S., Behera, B. R., Chizhov, A. Yu., Corradi, L., Courtin, S., Fioretto, E., Gadea, A., Gomes, P. R. S., Haas, F., Itkis, I. M., Itkis, M. G., Kniajeva, G. N., Kondratiev, N. A., Kozulin, E. M., Latina, A., Montagnoli, G., Pokrovsky, I. V., Rowley, N., Sagaidak, R. N., Scarlassara, F., Szanto de Toledo, A., Szilner, S., Voskressensky, V. M., Wu, Y. W., Gross, Carl J., editor, Nazarewicz, Witold, editor, and Rykaczewski, Krzysztof P., editor

Published
2005
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17. Structure of the [formula omitted] As, Ge, Ga nuclei

Author

Sahin, E., de Angelis, G., Duchene, G., Faul, T., Gadea, A., Lisetskiy, A.F., Ackermann, D., Algora, A., Aydin, S., Azaiez, F., Bazzacco, D., Benzoni, G., Bostan, M., Byrski, T., Celikovic, I., Chapman, R., Corradi, L., Courtin, S., Curien, D., Pramanik, U. Datta, Didierjean, F., Dorvaux, O., Erduran, M.N., Erturk, S., Farnea, E., Fioretto, E., de France, G., Franchoo, S., Gall, B., Gottardo, A., Guiot, B., Haas, F., Ibrahim, F., Ince, E., Khouaja, A., Kusoglu, A., La Rana, G., Labiche, M., Lebhertz, D., Lenzi, S., Leoni, S., Lunardi, S., Mason, P., Mengoni, D., Michelagnoli, C., Modamio, V., Montagnoli, G., Montanari, D., Moro, R., Mouginot, B., Napoli, D.R., OʼDonnell, D., Oliveira, J.R.B., Ollier, J., Orlandi, R., Pollarolo, G., Recchia, F., Robin, J., Salsac, M.-D., Scarlassara, F., Singh, R.P., Silvestri, R., Smith, J.F., Stefan, I., Stefanini, A.M., Subotic, K., Szilner, S., Tonev, D., Torres, D.A., Trotta, M., Ujic, P., Ur, C., Valiente-Dobón, J.J., Verney, D., Yalcinkaya, M., Wady, P.T., Wiedemann, K.T., and Zuber, K.

Published
2012
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18. Lifetime measurements of states of 35S, 36S, 37S, and 38S using the AGATA γ-ray tracking spectrometer

Author

Grocutt, L., Chapman, R., Bouhelal, M., Haas, F., Goasduff, A., Smith, J. F., Lubna, R. S., Courtin, S., Bazzacco, D., Braunroth, T., Capponi, L., Corradi, L., Derkx, X., Desesquelles, P., Doncel, M., Fioretto, E., Gottardo, A., Liberati, V., Melon, B., Mengoni, D., Michelagnoli, C., Mijatović, Tea, Modamio, V., Montagnoli, G., Montanari, D., Mulholland, K. F., Napoli, D. R., Petrache, C. M., Pipidis, A., Recchia, F., Sahin, E., Singh, P. P., Stefanini, A. M., Szilner, Suzana, and Valiente-Dobon, J. J.

Subjects
nuclear structure, lifetimes, shell model
Abstract

Lifetimes or lifetime limits of a small number of excited states of the sulfur isotopes with mass numbers A=35, 36, 37, and 38 have been measured using the differential recoil-distance method. The isotopes of sulfur were populated in binary grazing reactions initiated by a beam of 36S ions of energy 225 MeV incident on a thin 208Pb target which was mounted in the Cologne plunger apparatus. The combination of the PRISMA magnetic spectrometer and an early implementation of the AGATA γ-ray tracking array was used to detect γ rays in coincidence with projectile-like nuclear species. Lifetime measurements of populated states were measured within the range from about 1 to 100 ps. The number of states for which lifetime measurements or lifetime limits were possible was limited by statistics. For 35S, the lifetime was determined for the first 1/2+ state at 1572 keV ; the result is compared with a previous published lifetime value. The lifetime of the 3− state of 36S at 4193 keV was determined and compared with earlier measurements. No previous lifetime information exists for the (6+) state at 6690 keV ; a lifetime measurement with large associated error was made in the present work. For 37S, the states for which lifetime limits were established were those at 646 keV with Jπ=3/2− and at 2776 keV with Jπ=11/2− ; there are no previously published lifetime values for excited states of 37S. Finally, a lifetime limit was established for the Jπ=(6+) state of 38S at 3675 keV ; no lifetime information exists for this state in the literature. Measured lifetime values were compared with the results of state-of-the-art shell-model calculations based on the PSDPF, SDPF-U, and FSU effective interactions. In addition, nuclear magnetic-dipole and electric-quadrupole moments, branching ratios, mixing ratios, and electromagnetic transition rates, where available, have been compared with shell-model values. The current work suffers from poor statistics ; nevertheless, lifetime values and limits have been possible, allowing a useful discussion of the ability of state-of-the-art shell-model calculations to reproduce the experimental results.

Published
2022

19. Search for in-band transitions in the candidate superdeformed band in Si 28

Author

Morris, L., Jenkins, D. G., Harakeh, M. N., Isaak, J., Kobayashi, N., Tamii, A., Adachi, S., Adsley, P., Aoi, N., Bracco, A., Brown, A., Carpenter, M. P., Carroll, J. J., Courtin, S., Crespi, F. C.L., Davies, P. J., Fruet, G., Fang, Y. D., Fujita, H., Gey, G., Hoang, T. H., Ichige, N., Ideguchi, E., Inoue, A., Iwamoto, C., Koike, T., Raju, M. Kumar, Liu, M. L., Montanari, D., Von Neumann-Cosel, P., Noji, S., Ong, H. J., Savran, D., Schmitt, J. M., Sullivan, C., Wasilewska, B., Weinert, M., Werner, V., Yamamoto, Y., Zegers, R. G.T., Zhou, X. H., and Zhu, S.

Abstract

Background: Superdeformed (SD) bands are suggested by theory around Ca40 and in lighter alpha-conjugate nuclei such as Mg24, Si28, and S32. Such predictions originate from a number of theoretical models including mean-field models and antisymmetrized molecular dynamics (AMD) calculations. While SD bands have been identified in Ca40 and its near neighbors, evidence of their existence in the lighter, midshell nuclei is circumstantial at best. The key evidence of superdeformation would be the observation of transitions with high B(E2) transition strengths connecting states in a rotational sequence. This is challenging information to obtain since the bands lie at a high excitation energy and competition from out-of-band decay is dominant. Purpose: The purpose of the present study is to establish a new methodology to circumvent the difficulties in identifying and quantifying in-band transitions through directly populating candidate states in the SD band in Si28 through inelastic alpha scattering, selecting such states with a spectrometer, and measuring their gamma-ray decay with a large array of high-purity germanium detectors, allowing direct access to electromagnetic transition strengths. Methods: Excited states in Si28 were populated in the Si28(α,α′) reaction using a 130-MeV He4 beam from the K140 AVF cyclotron at the Research Center for Nuclear Physics. Outgoing alpha particles were analyzed using the Grand Raiden spectrometer positioned at an angle of 9.1° to favor the population of states with J≈4. Coincident gamma rays were detected with the CAGRA array of 12 HPGe clover detectors augmented by a set of four large LaBr3 detectors. Results: Data analysis showed that it was possible to identify additional low-energy transitions in competition with high-energy decays from excited states in Si28 in the vicinity of 10 MeV. However, while the candidate 4+ SD state at 10.944 MeV was populated, a 1148-keV transition to the candidate 2+ SD state at 9.796 MeV was not observed, and only an upper limit for its transition strength of B(E2)

Published
2021

24. How well do we understand the reaction rate of C burning?

Author

Courtin S., Jiang C.L., Fruet G., Auranen K., Avila M.L., Ayangeakaa A.D., Back B.B., Bottoni S., Carpenter M., Dickerson C., DiGiovine B., Greene J.P., Henderson D.J., Hoffman C.R., Janssens R.V.F., Kay B.P., Kuvin S.A., Lauritsen T., Pardo R.C., Rehm K.E., Santiago-Gonzalez D., Sethi J., Seweryniak D., Talwar R., Ugalde C., Zhu S., Deibel C.M., Marley S.T., Bourgin D., Haas F., Heine M., Montanari D., Jenkins D.G., Morris L.G., Lefebvre-Schuhl A., Almaraz-Calderon S., Fang X., Tang X.D., Alcorta M., Bucher B., Albers M., and Bertone P.

Subjects
Physics, QC1-999
Abstract

Carbon burning plays a crucial role in stellar evolution, where this reaction is an important route for the production of heavier elements. A particle-γ coincidence technique that minimizes the backgrounds to which this reaction is subject and provides reliable cross sections has been used at the Argonne National Laboratory to measure fusion cross-sections at deep sub-barrier energies in the 12C+12C system. The corresponding excitation function has been extracted down to a cross section of about 6 nb. This indicates the existence of a broad S-factor maximum for this system. Experimental results are presented and discussed.

Published
2017
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25. Study of the population of neutron-rich heavy nuclei in the A~200 mass region via multinucleon transfer reactions

Author

Fioretto E., Corradi L., Galtarossa F., Szilner S., Montanari D., Mijatović T., Pollarolo G., Jia H.M., Ackermann D., Bourgin D., Colucci G., Courtin S., Fruet G., Goasduff A., Grebosz J., Haas F., Jelavić Malenica D., Jeong S.C., John P.R., Milin M., Montagnoli G., Skukan N., Scarlassara F., Soić N., Stefanini A.M., Strano E., Tokić V., Ur C.A, Valiente-Dobón J.J., and Watanabe Y.X.

Subjects
Physics, QC1-999
Abstract

Multineutron and multiproton transfer channels, populated in the inverse kinematics reaction 197Au+130Te at Elab=1.07 GeV, were measured at Laboratori Nazionali di Legnaro using the presently heaviest ion beam delivered by the PIAVE-ALPI accelerator complex and detecting both projectile-like and targetlike ions. To this end the large solid angle magnetic spectrometer PRISMA was coupled to a second arm for the detection of the heavy fragments in kinematic coincidence with the light ones selected and identified with the spectrometer. The data analysis is still in progress and will allow to compare the yields of both light and heavy partner with theoretical predictions performed with the GRAZING code to get quantitative information on transfer channels and the effect of evaporation and fission on the production rate of primary fragments. The mass integrated Z distribution, extracted from the experimental data, evidenced the population of proton pickup channels that, in conjunction with the neutron stripping ones from the 130Te, open the path for the production of neutron-rich heavy nuclei. In the following, we will present some preliminary results as well as details on the experimental configuration and perspectives for future investigations in the neutron-rich heavy region.

Published
2017
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26. Fusion hindrance for the positive Q-value system 12C+30Si

Author

Galtarossa F., Stefanini A. M., Montagnoli G., Jiang C. L., Colucci G., Bottoni S., Broggini C., Caciolli A., Colović P., Corradi L., Courtin S., Depalo R., Fioretto E., Fruet G., Gal A., Goasduff A., Heine M., Hu S. P., Kaur M., Mijatović T., Montanari D., Scarlassara F., Strano E., Szilner S., and Zhang G. X.

Subjects
Physics, QC1-999
Abstract

The fusion excitation function for the positive-Q-value system 12C+30Si (Qfus = +14.1 MeV) has been measured in inverse kinematics down to the μb level and compared with standard coupled-channel calculations. The appearance of the fusion hindrance phenomenon and the evidence of a S-factor maximum have been observed. This result can be significant to extrapolate the behavior of lighter astrophysical relevant systems at deep sub-barrier energies, where existing experimental data are still contradicting and affected by large errors.

Published
2017
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27. Sub-barrier fusion of Si+Si systems

Author

Colucci G., Montagnoli G., Stefanini A. M., Bourgin D., Čolović P., Corradi L., Courtin S., Faggian M., Fioretto E., Galtarossa F., Goasduff A., Haas F., Mazzocco M., Scarlassara F., Stefanini C., Strano E., Urbani M., Szilner S., and Zhang G. L.

Subjects
Physics, QC1-999
Abstract

The near- and sub-barrier fusion excitation function has been measured for the system 30Si+30Si at the Laboratori Nazionali di Legnaro of INFN, using the 30Si beam of the XTU Tandem accelerator in the energy range 47 - 90 MeV. A set-up based on a beam electrostatic deflector was used for detecting fusion evaporation residues. The measured cross sections have been compared to previous data on 28Si+28Si and Coupled Channels (CC) calculations have been performed using M3Y+repulsion and Woods-Saxon potentials, where the lowlying 2+ and 3− excitations have been included. A weak imaginary potential was found to be necessary to reproduce the low energy 28Si+28Si data. This probably simulates the effect of the oblate deformation of this nucleus. On the contrary, 30Si is a spherical nucleus, 30Si+30Si is nicely fit by CC calculations and no imaginary potential is needed. For this system, no maximum shows up for the astrophysical S-factor so that we have no evidence for hindrance, as confirmed by the comparison with CC calculations. The logarithmic derivative of the two symmetric systems highlights their different low energy trend. A difference can also be noted in the two barrier distributions, where the high-energy peak present in 28Si+28Si is not observed for 30Si+30Si, probably due to the weaker couplings in last case.

Published
2017
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28. Sub-barrier fusion cross section measurements with STELLA

Author

Heine M., Courtin S., Fruet G., Jenkins D.G., Montanari D., Adsley P., Beck C., Della Negra S., Dené P., Haas F., Hammache F., Heitz G., Kirsebom O.S., Krauth M., Lesrel J., Meyer A., Morris L., Regan P.H., Richer M., Rudigier M., de Séréville N., and Stodel C.

Subjects
Physics, QC1-999
Abstract

The experimental setup STELLA (STELlar LAboratory) is designed for the measurement of deep sub-barrier light heavy ion fusion cross sections. For background suppression the γ-particle coincidence technique is used. In this project, LaBr3 detectors from the UK FATIMA (FAst TIMing Array) collaboration are combined with annular silicon strip detectors customized at IPHC-CNRS, Strasbourg, and the setup is located at Andromède, IPN, Orsay. The commissioning of the experimental approach as well as a sub-barrier 12C +12C → 24Mg∗ cross section measurement campaign are carried out.

Published
2017
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29. Cross section measurements in the 12C+12C system

Author

Courtin S., Jiang C.L., Fruet G., Heine M., Jenkins D.G., Adsley P., Morris L.G., Regan P.H., Rudigier M., Montanari D., Della Negra S., de Séréville N., Haas F., Hammache F., Kirsebom O.S., Lesrel J., Meyer A., Auranen K., Avila M.L., Ayangeakaa A.D., Back B.B., Bottoni S., Carpenter M., Dickerson C., DiGiovine B., Greene J.P., Henderson D.J., Hoffman C.R., Janssens R.V.F., Kay B.P., Kuvin S.A., Lauritsen T., Pardo R.C., Rehm K.E., Santiago-Gonzalez D., Sethi J., Seweryniak D., Talwar R., Ugalde C., Zhu S., Deibel C.M., Marley S.T., Bourgin D., Stodel C., Lefebvre-Schuhl A., Almaraz-Calderon S., Fang X., Tang X.D., Alcorta M., Bucher B., Albers M., and Bertone P.

Subjects
Physics, QC1-999
Abstract

The 12C+12C fusion reaction is one of the most important for nuclear astrophysics since it determines the carbon ignition in stellar environments. Two experiments which make use of the gamma-particle coincidence technique to measure the 12C+12C S-factors at deep sub barrier energies are discussed. Results are presented showing a decrease of the S-factor below Ec.m. = 3 MeV.

Published
2017
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30. Prompt and delayed $\gamma$ spectroscopy of neutron-rich $^{94}$Kr and observation of a new isomer

Author

Gerst, R.-B., Blazhev, A., Warr, N., Wilson, J., Lebois, M., Jovančević, N., Thisse, D., Canavan, R., Rudigier, M., Etasse, D., Adamska, E., Adsley, P., Algora, A., Babo, M., Belvedere, K., Benito, J., Benzoni, G., Boso, A., Bottoni, S., Bunce, M., Chakma, R., Cieplicka-Oryńczak, N., Courtin, S., Cortés, M., Davies, P., Delafosse, C., Fallot, Muriel, Fornal, B., Fraile, L., Gjestvang, D., Gottardo, A., Guadilla, V., Häfner, G., Hauschild, K., Heine, M., Henrich, C., Homm, I., Ibrahim, F., Iskra, Ł., Ivanov, P., Jazrawi, S., Korgul, A., Koseoglou, P., Kröll, T., Kurtukian-Nieto, T., Le Meur, L., Leoni, S., Ljungvall, J., Lopez-Martens, A., Lozeva, R., Matea, I., Miernik, K., Nemer, J., Oberstedt, S., Paulsen, W., Piersa, M., Popovitch, Y., Porzio, C., Qi, L., Ralet, D., Regan, P., Reygadas-Tello, D., Rezynkina, K., Sánchez-Tembleque, V., Schmitt, C., Söderström, P.-A., Sürder, C., Tocabens, G., Vedia, V., Verney, D., Wasilewska, B., Wiederhold, J., Yavachova, M., Zeiser, F., Ziliani, S., Laboratoire de Physique des 2 Infinis Irène Joliot-Curie (IJCLab), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), Laboratoire de physique corpusculaire de Caen (LPCC), Université de Caen Normandie (UNICAEN), Normandie Université (NU)-Normandie Université (NU)-École Nationale Supérieure d'Ingénieurs de Caen (ENSICAEN), Normandie Université (NU)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Institut Pluridisciplinaire Hubert Curien (IPHC), Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de physique subatomique et des technologies associées (SUBATECH), Université de Nantes - UFR des Sciences et des Techniques (UN UFR ST), Université de Nantes (UN)-Université de Nantes (UN)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-IMT Atlantique (IMT Atlantique), Institut Mines-Télécom [Paris] (IMT)-Institut Mines-Télécom [Paris] (IMT), Centre d'Etudes Nucléaires de Bordeaux Gradignan (CENBG), Université Sciences et Technologies - Bordeaux 1 (UB)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Grand Accélérateur National d'Ions Lourds (GANIL), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Normandie Université (NU)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université de Strasbourg (UNISTRA)-Centre National de la Recherche Scientifique (CNRS), Université de Nantes (UN)-Université de Nantes (UN)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-IMT Atlantique Bretagne-Pays de la Loire (IMT Atlantique), 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 Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)

Subjects
[PHYS]Physics [physics], [PHYS.NUCL]Physics [physics]/Nuclear Theory [nucl-th], Astrophysics::High Energy Astrophysical Phenomena, Nuclear Theory, Physics::Atomic and Molecular Clusters, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], Nuclear Experiment
Abstract

International audience; Prompt and delayed γ-ray spectroscopy of the neutron-rich 94Kr was performed, as part of the fission campaign at the ALTO facility of the IPN Orsay, using the fast-neutron-induced fission reaction 238U(n,f) in combination with the ν-Ball array, a novel hybrid γ spectrometer for energy and lifetime measurements. Several new yrast and nonyrast transitions were observed for the first time, extending the previously known level scheme. Additionally, we report on the observation of a new short-lived isomer at 3444 keV with a half-life of 32(3) ns. The analysis of the Nilsson orbitals obtained from Gogny cranked Hartree-Fock-Bogoliubov calculations suggests a (9−) spin and an oblate deformation for this isomer corresponding to a two-quasineutron state, indicating an isomeric structure very similar to that of the neighboring isotones 96Sr and 92Se

Published
2020

31. Decay of a narrow and high spin 24Mg + 24Mg resonance

Author

Salsac, M.-D., Haas, F., Courtin, S., Algora, A., Beck, C., Beghini, S., Behera, B.R., Chapman, R., Corradi, L., Dombradi, Z., Farnea, E., Fioretto, E., Gadea, A., Jenkins, D.G., Latina, A., Lebhertz, D., Lenzi, S., Liang, X., Marginean, N., Montagnoli, G., Napoli, D., Papka, P., Pokrovski, I., Pollarolo, G., Rousseau, M., Sahin, E., Sanchez i Zafra, A., Scarlassara, F., Sohler, D., Stefanini, A.M., Szilner, S., Trotta, M., Ur, C., Vedova, F. Della, Wang, Z.M., and Wiedemann, K.T.

Published
2008
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33. Multi-quasiparticle sub-nanosecond isomers in 178W

Author

Rudigier, M., Walker, P.M., Canavan, R.L., Podolyák, Zs., Regan, P.H., Söderström, P.-A., Lebois, M., Wilson, J.N., Jovancevic, N., Blazhev, A., Benito, J., Bottoni, S., Brunet, M., Cieplicka-Orynczak, N., Courtin, S., Doherty, D.T., Fraile, L.M., Hadynska-Klek, K., Heine, M., Iskra, Ł.W., Jolie, J., Karayonchev, V., Kennington, A., Koseoglou, P., Lotay, G., Lorusso, G., Nakhostin, M., Nita, C.R., Oberstedt, S., Qi, L., Régis, J.-M., Sánchez-Tembleque, V., Shearman, R., Witt, W., Vedia, V., and Zell, K.O.

Published
2020
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34. Sub-barrier fusion and transfers in the 40Ca + 58,64Ni systems

Author

Bourgin D., Courtin S., Haas F., Goasduff A., Stefanini A.M., Montagnoli G., Montanari D., Corradi L., Huiming J., Scarlassara F., Fioretto E., Simenel C., Rowley N., Szilner S., and Mijatović T.

Subjects
Physics, QC1-999
Abstract

Fusion cross sections have been measured in the 40Ca + 58Ni and 40Ca + 64Ni systems at energies around and below the Coulomb barrier. The 40Ca beam was delivered by the XTU Tandem accelerator of the Laboratori Nazionali di Legnaro and evaporation residues were measured at very forward angles with the LNL electrostatic beam deflector. Coupled-channels calculations were performed which highlight possible strong effects of neutron transfers on the fusion below the barrier in the 40Ca + 64Ni system. Microscopic time-dependent Hartree-Fock calculations have also been performed for both systems. Preliminary results are shown.

Published
2016
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35. Fusion reactions of 58,64Ni+124Sn

Author

Galtarossa F., Jiang C.L., Stefanini A.M., Esbensen H., Rehm K.E., Almaraz Calderon S., Avila M.L., Back B.B., Bourgin D., Corradi L., Courtin S., Fioretto E., Goasduff A., Haas F., Mazzocco M., Montanari D., Montagnoli G., Mijiatovic T., Sagaidak R., Santiago-Gonzalez D., Scarlassara F., Strano E., and Szilner S.

Subjects
Physics, QC1-999
Abstract

In order to better understand the influence of transfer in sub-barrier nuclear reactions, cross sections for the system 58,64Ni+124Sn have been measured down to 0.5-1 µb and compared to detailed coupledchannel calculations. In agreement with a phenomenological Q-value systematics, calculations show the importance of including the coupling to the transfer channel for these heavy systems. No clear evidence of fusion hindrance is observed, probably due to the fact that the cross sections measured in this experiment are not low enough for the appearance of that phenomenon.

Published
2016
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36. Recent experiments in inverse kinematics with the magnetic spectrometer PRISMA

Author

Fioretto E., Corradi L., Montanari D., Szilner S., Pollarolo G., Galtarossa F., Ackermann D., Montagnoli G., Scarlassara F., Stefanini A.M., Courtin S., Goasduff A., Haas F., Jelavić-Malenica D., Michelagnoli C., Mijatović T., Soić N., Ur C., and Valiente-Dobon J.J.

Subjects
Physics, QC1-999
Abstract

In the last period, two classes of experiments have been carried out with the large acceptance magnetic spectrometer PRISMA. In particular, the one- and two-neutron transfer processes at energies ranging from the Coulomb barrier to deep below it and the population of exotic neutron rich nuclei in the A~130 and A~200 mass regions have been studied. Both kinds of experiments have been performed in inverse kinematics identifying in A, Z and velocity the light target-like recoils with PRISMA placed at very forward angles in order to have, at the same time, high efficiency and good energy and mass resolutions.

Published
2016
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37. Fusion measurements of 12C+12C at energies of astrophysical interest

Author

Santiago-Gonzalez D., Jiang C.L., Rehm K.E., Alcorta M., Almaraz-Calderon S., Avila M.L., Ayangeakaa A.D., Back B.B., Bourgin D., Bucher B., Carpenter M.P., Courtin S., David H.M., Deibel C.M., Dickerson C., DiGiovine B., Fang X., Greene J.P., Haas F., Henderson D.J., Janssens R.V.F., Jenkins D., Lai J., Lauritsen T., Lefebvre-Schuhl A., Montanari D., Pardo R.C., Paul M., Seweryniak D., Tang X.D., Ugalde C., and Zhu S.

Subjects
Physics, QC1-999
Abstract

The cross section of the 12C+12C fusion reaction at low energies is of paramount importance for models of stellar nucleosynthesis in different astrophysical scenarios, such as Type Ia supernovae and Xray superbursts, where this reaction is a primary route for the production of heavier elements. In a series of experiments performed at Argonne National Laboratory, using Gammasphere and an array of Silicon detectors, measurements of the fusion cross section of 12C+12C were successfully carried out with the γ and charged-particle coincidence technique in the center-of-mass energy range of 3-5 MeV. These were the first background-free fusion cross section measurements for 12C+12C at energies of astrophysical interest. Our results are consistent with previous measurements in the high-energy region; however, our lowest energy measurement indicates a fusion cross section slightly lower than those obtained with other techniques.

Published
2016
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38. Half-life measurements in 164,166Dy using γ−γ fast-timing spectroscopy with the ν-Ball spectrometer

Author

Canavan, R. L., Rudigier, M., Regan, P. H., Lebois, M., Wilson, J. N., Jovancevic, N., Söderström, P.-A., Collins, S. M., Thisse, D., Benito, J., Bottoni, S., Brunet, M., Cieplicka-Oryńczak, N., Courtin, S. (Sandrine), Doherty, D. T., Fraile, L. M., Hadyńska-Klęk, K., Häfner, G., Heine, M. (Marcel), Iskra, Ł. W., Karayonchev, V., Kennington, A., Koseoglou, P., Lotay, G., Lorusso, G., Nakhostin, M., Niţă, C. R., Oberstedt, S., Podolyák, Zs., Qi, L., Régis, J.-M., Sánchez-Tembleque, V., Shearman, R., Vedia, V., and Witt, W.

Subjects
Aucun
Published
2020

39. Half-life measurements in $^{164,166}\mathrm{Dy}$ using ${\gamma}\text{-}{\gamma}$ fast-timing spectroscopy with the ${\nu}$-Ball spectrometer

Author

Canavan, R.L., Rudigier, M., Regan, P.H., Lebois, M., Wilson, J.N., Jovancevic, N., Söderström, P.A., Collins, S.M., Thisse, D., Benito, J., Bottoni, S., Brunet, M., Cieplicka-Oryńczak, N., Courtin, S., Doherty, D.T., Fraile, L.M., Hadyńska-Klęk, K., Häfner, G., Heine, M., Iskra, Ł. W., Karayonchev, V., Kennington, A., Koseoglou, P., Lotay, G., Lorusso, G., Nakhostin, M., Niţă, C.R., Oberstedt, S., Podolyák, Zs., Qi, L., Régis, J.M., Sánchez-Tembleque, V., Shearman, R., Vedia, V., Witt, W., 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), Université Paris-Sud - Paris 11 (UP11), Centre de Sciences Nucléaires et de Sciences de la Matière (CSNSM), Institut Pluridisciplinaire Hubert Curien (IPHC), Université de Strasbourg (UNISTRA)-Centre National de la Recherche Scientifique (CNRS), 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), and Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université de Strasbourg (UNISTRA)-Centre National de la Recherche Scientifique (CNRS)

Subjects
Nuclear Theory, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], Nuclear Experiment, Nuclear Structure
Abstract

International audience; We report on the measurement of lifetimes of excited states in the near-mid-shell nuclei Dy164,166 using the gamma-ray coincidence fast-timing method. The nuclei of interest were populated using reactions between an O18 beam and a gold-backed isotopically enriched Dy164 target of thickness 6.3mg/cm2 at primary beam energies of 71, 76, and 80 MeV from the IPN-Orsay laboratory, France. Excited states were populated in Dy164, Dy166, and W178,179 following Coulomb excitation, inelastic nuclear scattering, two-neutron transfer, and fusion-evaporation reaction channels respectively. Gamma rays from excited states were measured using the ν-Ball high-purity germanium (HPGe)-LaBr3 hybrid γ-ray spectrometer with the excited state lifetimes extracted using the fast-timing coincidence method using HPGe-gated LaBr3-LaBr3 triple coincident events. The lifetime of the first Iπ=2+ excited state in Dy166 was used to determine the transition quadrupole deformation of this neutron-rich nucleus for the first time. The experimental methodology was validated by showing consistency with previously determined excited state lifetimes in Dy164. The half-lives of the yrast 2+ states in Dy164 and Dy166 were 2.35(6) and 2.3(2) ns, respectively, corresponding to transition quadrupole moment values of Q0=7.58(9) and 7.5(4) eb, respectively. The lifetime of the yrast 2+ state in Dy166 is consistent with a quenching of nuclear quadrupole deformation at β≈0.35 as the N=104 mid-shell is approached.

Published
2020

40. Multi-quasiparticle sub-nanosecond isomers in W

Author

Rudigier, M., Walker, P.M., Canavan, R.L., Podolyák, Zs., Regan, P.H., Söderström, P.A., Lebois, M., Wilson, J.N., Jovancevic, N., Blazhev, A., Benito, J., Bottoni, S., Brunet, M., Cieplicka-Orynczak, N., Courtin, S., Doherty, D.T., Fraile, L.M., Hadynska-Klek, K., Heine, M., Iskra, Ł.W., Jolie, J., Karayonchev, V., Kennington, A., Koseoglou, P., Lotay, G., Lorusso, G., Nakhostin, M., Nita, C.R., Oberstedt, S., Qi, L., Régis, J.M., Sánchez-Tembleque, V., Shearman, R., Witt, W., Vedia, V., and Zell, K.O.

Abstract

We report on the first measurement of the half-lives of Kπ=11− and 12+ four-quasiparticle states in the even-even nucleus $^{178}$W. The sub-nanosecond half-lives were measured by applying the centroid shift method to data taken with LaBr$_{3}$(Ce) scintillator detectors of the NuBall array at the ALTO facility in Orsay, France. The half-lives of these states only became experimentally accessible by the combination of several experimental techniques - scintillator fast timing, isomer spectroscopy with a pulsed beam, and the event-by-event calorimetry information provided by the NuBall array. The measured half-lives are 476(44)ps and 275(65)ps for the Iπ=11− and 12+ states, respectively. The decay transitions include weakly hindered E1 and E2 branches directly to the ground-state band, bypassing the two-quasiparticle states. This is the first such observation for an E1 transition. The interpretation of the small hindrance hinges on mixing between the ground-state band and the t-band.

Published
2019

41. Fusion-evaporation cross-sections for 48Ca + 154Sm near the Coulomb barrier: Evidence for fusion enhancement and hindrance

Author

Stefanini, A. M., Trotta, M., Behera, B. R., Corradi, L., Fioretto, E., Gadea, A., Latina, A., Szilner, S., Wu, Y. W., Beghini, S., Montagnoli, G., Scarlassara, F., Chizhov, A. Yu., Itkis, I. M., Kondratiev, N. A., Pokrovskiy, I. V., Sagaidak, R. N., Kniajeva, G. N., Kozulin, E. M., Voskressensky, V. M., Courtin, S., Haas, F., and Rowley, N.

Published
2005
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42. Search for cluster emission and extremely deformed shapes using charged-particle spectroscopy

Author

Beck, C., Rousseau, M., Papka, P., Sànchez i Zafra, A., Bhattacharya, C., Rauch, V., Bednarczyk, P., Courtin, S., Dorvaux, O., Haas, F., Nourreddine, A., Piqueras, I., Robin, J., El Bakali, L., Enaux, C., Galmar, E., Szilner, S., Stezowski, O., Prévost, A., Thummerer, S., von Oertzen, W., Hachem, A., Martin, E., Fahli, A., Morsad, A., Szanto de Toledo, A., and Sanders, S. J.

Published
2003
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43. Beta-decay studies using total absorption spectroscopy

Author

Algora, A., Batist, L., Borge, M. J. G., Cano-Ott, D., Collatz, R., Courtin, S., Dessagne, Ph, Fraile, L. M., Gadea, A., Gelletly, W., Hellström, M., Janas, Z., Jungclaus, A., Kirchner, R., Karny, M., Le Scornet, G., Miehé, Ch, Maréchal, F., Moroz, F., Nácher, E., Poirier, E., Roeckl, E., Rubio, B., Rykaczewski, K., Tain, J. L., Tengblad, O., Wittmann, V., GSI-TAS Collaboration, and LUCRECIA-TAgS Collaboration

Published
2003
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44. Mirror decay of 75Sr

Author

Huikari, J., Oinonen, M., Algora, A., Cederkäll, J., Courtin, S., Dessagne, P., Fraile, L., Franchoo, S., Fynbo, H., Huang, W.X., Jokinen, A., Knipper, A., Marechal, F., Miehé, C., Nacher, E., Peräjärvi, K., Poirier, E., Weissman, L., Äystö, J., and and the ISOLDE Collaboration

Published
2003
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45. No enhancement of fusion probability by the neutron halo of 6He

Author

Raabe, R., Sida, J. L., Charvet, J. L., Alamanos, N., Angulo, C., Casandjian, J. M., Courtin, S., Drouart, A., Durand, D. J. C., Figuera, P., Gillibert, A., Heinrich, S., Jouanne, C., Lapoux, V., Lepine-Szily, A., Musumarra, A., Nalpas, L., Pierroutsakou, D., Romoli, M., Rusek, K., and Trotta, M.

Subjects
Environmental issues, Science and technology, Zoology and wildlife conservation
Abstract

Author(s): R. Raabe (corresponding author) [1, 2]; J. L. Sida [1, 10]; J. L. Charvet [1]; N. Alamanos [1]; C. Angulo [3]; J. M. Casandjian [4]; S. Courtin [5]; A. [...]

Published
2004
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46. First identification of rotational bands in 103Tc: Evolution of intrinsic proton states of the 97-105 43Tc isotopes

Author

Bauchet, A., Deloncle, I., Porquet, M.-G., Astier, A., Buforn, N., Meyer, M., Perriès, S., Redon, N., Gall, B.J.P., Hoellinger, F., Schulz, N., Duchêne, G., Courtin, S., Venkova, Ts., Butler, P.A., Amzal, N., Herzberg, R.D., Chewter, A., Cunningham, R., Houry, M., Lucas, R., Urban, W., Nowak, A., Piasecki, E., Duprat, J., Petrache, C., and Kröll, T.

Published
2001
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47. Fusion Hindrance and Quadrupole Collectivity in Collisions of A≃50 Nuclei: The Case of 48Ti + 58Fe

Author

Stefanini A. M., Montagnoli G., Corradi L., Courtin S., Bourgin D., Fioretto E., Goasduff A., Grebosz J., Haas F., Mazzocco M., Mijatović T., Montanari D., Parascandolo C., Scarlassara F., Strano E., Szilner S., Toniolo N., and Torresi D.

Subjects
Physics, QC1-999
Abstract

The fusion excitation function of 48Ti + 58Fe has been measured in a wide energy range around the Coulomb barrier, covering 6 orders of magnitude of the cross sections. We present here the preliminary results of this experiment, and a full comparison with the near-by system 58Ni + 54Fe where evidence of fusion hindrance shows up at relatively high cross sections. The sub-barrier cross sections of 48Ti + 58Fe are much larger than those of 58Ni + 54Fe. Significant differences are also observed in the logarithmic derivatives, astro-physical S-factors and fusion barrier distributions. The influence of low-energy nuclear structure on all these trends is pointed out and commented. Coupled-channels calculations using a Woods-Saxon potential are able to reproduce the experimental results for 48Ti + 58Fe. The logarithmic derivative of the excitation function is very nicely fit, and no evidence of hindrance is observed down to around 1 μb. The fusion barrier distribution is rather wide, flat and structureless. It is only in qualitative agreement with the calculated distribution.

Published
2015
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48. Exploring the influence of transfer channels on fusion reactions: the case of 40Ca + 58,64Ni

Author

Bourgin D., Courtin S., Haas F., Goasduff A., Stefanini A.M., Montagnoli G., Montanari D., Corradi L., Huiming J., Scarlassara F., Fioretto E., Simenel C., Rowley N., Jiang C.L., Szilner S., and Mijatović T.

Subjects
Physics, QC1-999
Abstract

Fusion cross sections have been measured in the 40Ca + 58Ni and 40Ca + 64Ni systems at beam energies ranging from Elab = 104.75 MeV to 153.5 MeV using the Laboratori Nazionali di Legnaro electrostatic deflector. Distributions of barriers have been extracted from the experimental data. Preliminary coupled channel calculations were performed and hints of effects of neutron transfers on the fusion below the barrier in the 40Ca + 64Ni are discussed.

Published
2015
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49. Transfer couplings and hindrance far below the barrier for 40Ca + 96Zr

Author

Stefanini A.M., Montagnoli G., Esbensen H., Corradi L., Courtin S., Fioretto E., Goasduff A., Grebosz J., Haas F., Mazzocco M., Michelagnoli C., Mijatović T., Montanari D., Pasqualato G., Parascandolo C., Scarlassara F., Strano E., Szilner S., Toniolo N., and Torresi D.

Subjects
Physics, QC1-999
Abstract

The sub-barrier fusion excitation function of 40Ca + 96Zr has been measured down to cross sections ≃2.4µb, i.e. two orders of magnitude smaller than obtained in the previous experiment, where the sub-barrier fusion of this system was found to be greatly enhanced with respect to 40Ca + 90Zr, and the need of coupling to transfer channels was suggested. The purpose of this work was to investigate the behavior of 40Ca + 96Zr fusion far below the barrier. The smooth trend of the excitation function has been found to continue, and the logarithmic slope increases very slowly. No indication of hindrance shows up, and a comparison with 48Ca + 96Zr is very useful in this respect. A new CC analysis of the complete excitation function has been performed, including explicitly one- and two-nucleon Q >0 transfer channels. Such transfer couplings bring significant cross section enhancements, even at the level of a few µb. Locating the hindrance threshold, if any, in 40Ca + 96Zr would require challenging measurements of cross sections in the sub-µb range.

Published
2015
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50. Quadrupole moment of superdeformed bands in 151Tb

Author

Finck, C., Stézowski, O., Beck, F.A., Appelbe, D.E., Byrski, T., Courtin, S., Cullen, D.M., Curien, D., de France, G., Duchêne, G., Ertürk, S., Gall, B.J.P., Garg, U., Haas, B., Khadiri, N., Kharraja, B., Kintz, N., Nourreddine, A., Prévost, D., Rigollet, C., Savajols, H., Twin, P.J., Vivien, J.P., and Zuber, K.

Published
1998
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