Recent progress in studying beta-delayed neutron emission
ORAL
Abstract
Beta-delayed neutron emission is a dominating decay process for most of the neutron-rich nuclei far from the stability line. Experimental studies on beta-delayed neutrons are of great significance in many fields, including nuclear physics, astrophysics, and industrial applications. It is a sensitive probe to the beta-decay feedings above neutron separation energy, which is related to the nuclear structures of parent and daughter nuclei. The decay process itself carries fundamental information on how neutron unbound states are formed in beta decay. Owing to its importance, rapid progress has been made in measuring beta-delayed neutron emission at many different radioactive ion-beam facilities in the last decade. In this contribution, I will present a few highlights of our recent experimental effort in studying beta-delayed neutrons in a range of nuclei with mass numbers A=24~132. The experimental findings were compared with various theoretical models, gaining valuable insights into the shell evolution in exotic nuclei as well as the statistical/nonstatistical natures of beta-delayed neutron emission in medium-heavy and heavy isotopes.
*This research was partly sponsored by the NSF under the contract NSF-MRI-1919735 and by the NNSA under the Stewardship Science Academic Alliances program through DOE Cooperative Agreements No. DE-NA0004068 and Office of Science, Office of Nuclear Physics under Contract No. DE-FG02-96ER40983.
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Publication: R. Yokoyama et al., Phys. Rev. C 100, 031302(R) (2019)
R. Yokoyama et al., Phys. Rev. C 108, 064307 (2023)
Z. Y. Xu et al., Phys. Rev. Lett. 131, 022501 (2023)
I. Cox et al., Phys. Rev. Lett. 132, 152503 (2024)
S. Neupane et al., to be published
Z. Y. Xu et al., to be published
Presenters
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Zhengyu Xu
- University of Tennessee
- University of Tennessee Knoxville