Issue |
EPJ Web Conf.
Volume 279, 2023
Nuclear Physics in Astrophysics – X (NPA-X 2022)
|
|
---|---|---|
Article Number | 12003 | |
Number of page(s) | 5 | |
Section | Nuclear Properties | |
DOI | https://doi.org/10.1051/epjconf/202327912003 | |
Published online | 22 March 2023 |
https://doi.org/10.1051/epjconf/202327912003
Study of decay properties for Ba to Nd nuclei relevant for the formation of the r-process rare-earth peak (A∼160)
1 Institut de Tècniques Energètiques (INTE), Universitat Politècnica de Catalunya (UPC), 08028 Barcelona, Spain.
2 Instituto de Física Corpuscular (IFIC), CSIC-UV, E-46980 Paterna, Spain.
3 Institute for Nuclear Research (ATOMKI), 4026 Debrecen, Bem tér 18/c, Hungary.
4 University of Debrecen, 4032 Debrecen, Egyetem tér 1, Hungary.
5 Department of Physics, University of Jyväskylä, Finland.
6 Centro de Investigación en Física Nuclear y Espectroscopía de Neutrones (CEFNEN). Comisión Chilena de Energía Nuclear, Nueva Bilbao 12501, Las Condes, Santiago-Chile.
7 Physics Division, Oak Ridge National Laboratory, Oak Ridge, TN 37830, USA.
8 RIKEN Nishina Center, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan.
9 Department of Physics and Astronomy, University of Tennessee, Knoxville, Tennessee 37996, USA.
10 TRIUMF, 4004 Wesbrook Mall, Vancouver, BC V6T 2A3, Canada.
11 STFC Daresbury Laboratory, Daresbury, Warrington WA4 4AD, United Kingdom.
12 School of Physics and Astronomy, The University of Edinburgh, Edinburgh EH9 3FD, United Kingdom.
13 Department of Physics and Astronomy, University of Victoria, Victoria, BC V8P 5C2, Canada.
14 Central Michigan University, Mt. Pleasant, MI 48859, USA.
15 Department of Physics, Kyushu University, 744 Motooka, Fukuoka 819-0395, Japan.
16 Center for Nuclear Study, The University of Tokyo, 2-1 Hirosawa, Wako, Saitama 351-0106, Japan.
17 Department of Physics, University of Liverpool, Liverpool L69 7ZE, United Kingdom.
18 Faculty of Physics, University of Warsaw, 02-093 Warsaw, Poland.
19 Department of Physics, the University of Hong Kong, Pokfulam Road, Hong Kong.
20 Department of Physics and Astronomy, The University of British Columbia, Vancouver BC V6T 1Z1, Canada.
21 Heavy Ion Laboratory, University of Warsaw, Pasteura 5A, 02-093 Warsaw, Poland.
22 www.wiki.ed.ac.uk/display/BRIKEN/Home
* max.pallas@upc.edu
† atarisal@ific.uv.es
Published online: 22 March 2023
At the RIKEN Nishina Center, exotic neutron-rich isotopes of Ba, La, Ce, Pr, and Nd were measured. This work reports their half-lives (T1/2) and β-delayed neutron-emission probabilities (Pxn). The setup consisted of the BigRIPS in-flight separator for particle identification, the Advanced Implantation Detector Array (AIDA) for ions and β detection, and the BRIKEN neutron counter for neutron detection. Using this arrangement, 4 new T1/2 and 14 new P1n were measured. Furthermore, 38 T1/2 and 2 P1n values were remeasured, decreasing the uncertainties for some of them. In addition to improving predictions of nucleosynthesis models that describe the production of the rare-earth peak at A ∼ 160 via the r-process, these additional experimental data should help to constrain theoretical models for calculations of T1/2 and Pxn in this region.
© The Authors, published by EDP Sciences, 2023
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