Low-lying level structure of Cu56 and its implications for the rp process
| العنوان: | Low-lying level structure of Cu56 and its implications for the rp process |
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| المؤلفون: | J. Browne, Ani Aprahamian, Daniel Bazin, Fernando Montes, C. Langer, M. Matos, Kathrin Wimmer, Laurens Keek, H. L. Crawford, Shumpei Noji, P. Hosmer, Alexandra Gade, D. Weisshaar, Eric Deleeuw, Filomena Nunes, A. Lemasson, S. J. Quinn, J. Pereira, J. Stevens, Mallory Smith, S. R. Stroberg, D. W. Bardayan, Antonios Kontos, Yukie Maeda, Sebastian George, E. Lunderberg, A. Spyrou, C. Domingo-Pardo, W.-J. Ong, I. Y. Lee, Hendrik Schatz, A. Nystrom, J. Wheeler, Remco Zegers, M. Scott, K. Siegl, B. A. Brown, G. Perdikakis, F. Recchia, Richard H. Cyburt, Zach Meisel, Anna Simon |
| المصدر: | Physical Review C. 95 |
| بيانات النشر: | American Physical Society (APS), 2017. |
| سنة النشر: | 2017 |
| مصطلحات موضوعية: | Physics, 010308 nuclear & particles physics, Q value, rp-process, 01 natural sciences, Nuclear physics, Mass formula, Excited state, 0103 physical sciences, Level structure, Isobaric process, Atomic physics, 010306 general physics, Spectroscopy, Multiplet |
| الوصف: | The low-lying energy levels of proton-rich Cu56 have been extracted using in-beam γ-ray spectroscopy with the state-of-the-art γ-ray tracking array GRETINA in conjunction with the S800 spectrograph at the National Superconducting Cyclotron Laboratory at Michigan State University. Excited states in Cu56 serve as resonances in the Ni55(p,γ)Cu56 reaction, which is a part of the rp process in type-I x-ray bursts. To resolve existing ambiguities in the reaction Q value, a more localized isobaric multiplet mass equation (IMME) fit is used, resulting in Q=639±82 keV. We derive the first experimentally constrained thermonuclear reaction rate for Ni55(p,γ)Cu56. We find that, with this new rate, the rp process may bypass the Ni56 waiting point via the Ni55(p,γ) reaction for typical x-ray burst conditions with a branching of up to ∼40%. We also identify additional nuclear physics uncertainties that need to be addressed before drawing final conclusions about the rp-process reaction flow in the Ni56 region. |
| تدمد: | 2469-9993 2469-9985 |
| DOI: | 10.1103/physrevc.95.055806 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_________::80b22b3c48ea0a85d047cc3883b23d64 https://doi.org/10.1103/physrevc.95.055806 |
| Rights: | OPEN |
| رقم الانضمام: | edsair.doi...........80b22b3c48ea0a85d047cc3883b23d64 |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 24699993 24699985 |
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| DOI: | 10.1103/physrevc.95.055806 |