Zobrazeno 1 - 10 of 182 pro vyhledávání: '"Z. Meisel"'
1
Akademický článek
Neutron-upscattering enhancement of the triple-alpha process
Autor: J. Bishop, C. E. Parker, G. V. Rogachev, S. Ahn, E. Koshchiy, K. Brandenburg, C. R. Brune, R. J. Charity, J. Derkin, N. Dronchi, G. Hamad, Y. Jones-Alberty, Tz. Kokalova, T. N. Massey, Z. Meisel, E. V. Ohstrom, S. N. Paneru, E. C. Pollacco, M. Saxena, N. Singh, R. Smith, L. G. Sobotka, D. Soltesz, S. K. Subedi, A. V. Voinov, J. Warren, C. Wheldon
Publikováno v: Nature Communications, Vol 13, Iss 1, Pp 1-5 (2022)
The triple-alpha process plays a role in nucleosynthesis, in the formation of 12C. Here, the authors discuss the rate and role of the neutron upscattering phenomenon on the triple-alpha process in a multi-step process.
Externí odkaz: https://doaj.org/article/1a41d4cd95b14b239e9690f1b14ccf60
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2
Akademický článek
Single neutron transfer on 23Ne and its relevance for the pathway of nucleosynthesis in astrophysical X-ray bursts
Autor: G. Lotay, J. Henderson, W.N. Catford, F.A. Ali, J. Berean, N. Bernier, S.S. Bhattacharjee, M. Bowry, R. Caballero-Folch, B. Davids, T.E. Drake, A.B. Garnsworthy, F. Ghazi Moradi, S.A. Gillespie, B. Greaves, G. Hackman, S. Hallam, D. Hymers, E. Kasanda, D. Levy, B.K. Luna, A. Mathews, Z. Meisel, M. Moukaddam, D. Muecher, B. Olaizola, N.A. Orr, H.P. Patel, M.M. Rajabali, Y. Saito, J. Smallcombe, M. Spencer, C.E. Svensson, K. Whitmore, M. Williams
Publikováno v: Physics Letters B, Vol 833, Iss , Pp 137361- (2022)
We present new experimental measurements of resonance strengths in the astrophysical 23Al(p,γ)24Si reaction, constraining the pathway of nucleosynthesis beyond 22Mg in X-ray burster scenarios. Specifically, we have performed the first measurement of
Externí odkaz: https://doaj.org/article/25acd0eb48fc47fca39d8b41a78613a9
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3
Akademický článek
57Zn β-delayed proton emission establishes the 56Ni rp-process waiting point bypass
Autor: M. Saxena, W. -J Ong, Z. Meisel, D.E.M. Hoff, N. Smirnova, P.C. Bender, S.P. Burcher, M.P. Carpenter, J.J. Carroll, A. Chester, C.J. Chiara, R. Conaway, P.A. Copp, B.P. Crider, J. Derkin, A. Estradé, G. Hamad, J.T. Harke, R. Jain, H. Jayatissa, S.N. Liddick, B. Longfellow, M. Mogannam, F. Montes, N. Nepal, T.H. Ogunbeku, A.L. Richard, H. Schatz, D. Soltesz, S.K. Subedi, I. Sultana, A.S. Tamashiro, V. Tripathi, Y. Xiao, R. Zink
Publikováno v: Physics Letters B, Vol 829, Iss , Pp 137059- (2022)
We measured the Zn57 β-delayed proton (βp) and γ emission at the National Superconducting Cyclotron Laboratory. We find a Zn57 half-life of 43.6±0.2 ms, βp branching ratio of (84.7±1.4)%, and identify four transitions corresponding to the exoti
Externí odkaz: https://doaj.org/article/85c492ce6a724e7f990332dbdf7bc6ec
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4
Akademický článek
Measurement of key resonance states for the P30(p,γ)S31 reaction rate, and the production of intermediate-mass elements in nova explosions
Autor: A. Kankainen, P.J. Woods, H. Schatz, T. Poxon-Pearson, D.T. Doherty, V. Bader, T. Baugher, D. Bazin, B.A. Brown, J. Browne, A. Estrade, A. Gade, J. José, A. Kontos, C. Langer, G. Lotay, Z. Meisel, F. Montes, S. Noji, F. Nunes, G. Perdikakis, J. Pereira, F. Recchia, T. Redpath, R. Stroberg, M. Scott, D. Seweryniak, J. Stevens, D. Weisshaar, K. Wimmer, R. Zegers
Publikováno v: Physics Letters B, Vol 769, Iss C, Pp 549-553 (2017)
We report the first experimental constraints on spectroscopic factors and strengths of key resonances in the P30(p,γ)S31 reaction critical for determining the production of intermediate-mass elements up to Ca in nova ejecta. The P30(d,n)S31 reaction
Externí odkaz: https://doaj.org/article/3ee5a6e1bb4b425b93b0accf51d3e4d6
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5
Akademický článek
β-delayed proton emission of 69Kr and the 68Se rp-process waiting point
Autor: M. Del Santo, Z. Meisel, D. Bazin, A. Becerril, B.A. Brown, H. Crawford, R. Cyburt, S. George, G.F. Grinyer, G. Lorusso, P.F. Mantica, F. Montes, J. Pereira, H. Schatz, K. Smith, M. Wiescher
Publikováno v: Physics Letters B, Vol 738, Iss , Pp 453-456 (2014)
The slow β-decay of the 68Se waiting point in the astrophysical rp-process can in principle be bypassed by a sequential two proton capture. The rate of this reaction sequence depends exponentially on the 69Br proton separation energy. We studied β-
Externí odkaz: https://doaj.org/article/075a039378954ec3b71fa15ec71b88c4
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7
Mass measurements show slowdown of rapid proton capture process at waiting-point nucleus 64Ge
Autor: X. Zhou, M. Wang, Y. H. Zhang, Yu. A. Litvinov, Z. Meisel, K. Blaum, X. H. Zhou, S. Q. Hou, K. A. Li, H. S. Xu, R. J. Chen, H. Y. Deng, C. Y. Fu, W. W. Ge, J. J. He, W. J. Huang, H. Y. Jiao, H. F. Li, J. G. Li, T. Liao, S. A. Litvinov, M. L. Liu, Y. F. Niu, P. Shuai, J. Y. Shi, Y. N. Song, M. Z. Sun, Q. Wang, Y. M. Xing, X. Xu, F. R. Xu, X. L. Yan, J. C. Yang, Y. Yu, Q. Yuan, Y. J. Yuan, Q. Zeng, M. Zhang, S. Zhang
Publikováno v: Nature Physics
X-ray bursts are among the brightest stellar objects frequently observed in the sky by space-based telescopes. A type-I X-ray burst is understood as a violent thermonuclear explosion on the surface of a neutron star, accreting matter from a companion
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a6162e6f25e87d64bd3cf5c4f5acc35d
https://doi.org/10.1038/s41567-023-02034-2
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