β -decay half-lives of 55 neutron-rich isotopes beyond the N=82 shell gap

J. Wu, S. Nishimura, P. Möller, M. R. Mumpower, R. Lozeva, C. B. Moon, A. Odahara, H. Baba, F. Browne, R. Daido, P. Doornenbal, Y. F. Fang, M. Haroon, T. Isobe, H. S. Jung, G. Lorusso, B. Moon, Z. Patel, S. Rice, H. SakuraiY. Shimizu, L. Sinclair, P. A. Söderström, T. Sumikama, H. Watanabe, Z. Y. Xu, A. Yagi, R. Yokoyama, D. S. Ahn, F. L. Bello Garrote, J. M. Daugas, F. Didierjean, N. Fukuda, N. Inabe, T. Ishigaki, D. Kameda, I. Kojouharov, T. Komatsubara, T. Kubo, N. Kurz, K. Y. Kwon, S. Morimoto, D. Murai, H. Nishibata, H. Schaffner, T. M. Sprouse, H. Suzuki, H. Takeda, M. Tanaka, K. Tshoo, Y. Wakabayashi

Research output: Contribution to journalArticle

Abstract

The β-decay half-lives of 55 neutron-rich nuclei Sn134-139, Sb134-142, Te137-144, I140-146, Xe142-148, Cs145-151, Ba148-153, and La151-155 were measured at the Radioactive Isotope Beam Factory employing the projectile fission fragments of U238. The nuclear level structure, which relates to deformation, has a large effect on the half-lives. The impact of newly measured half-lives on modeling the astrophysical origin of the heavy elements is studied in the context of r process nucleosynthesis. For a wide variety of astrophysical conditions, including those in which fission recycling occurs, the half-lives have an important local impact on the second (A ≈ 130) peak.

Original languageEnglish
Article number042801
JournalPhysical Review C
Volume101
Issue number4
DOIs
Publication statusPublished - Apr 2020
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics

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    Wu, J., Nishimura, S., Möller, P., Mumpower, M. R., Lozeva, R., Moon, C. B., Odahara, A., Baba, H., Browne, F., Daido, R., Doornenbal, P., Fang, Y. F., Haroon, M., Isobe, T., Jung, H. S., Lorusso, G., Moon, B., Patel, Z., Rice, S., ... Wakabayashi, Y. (2020). β -decay half-lives of 55 neutron-rich isotopes beyond the N=82 shell gap. Physical Review C, 101(4), [042801]. https://doi.org/10.1103/PhysRevC.101.042801