Bulletin of the American Physical Society
5th Joint Meeting of the APS Division of Nuclear Physics and the Physical Society of Japan
Volume 63, Number 12
Tuesday–Saturday, October 23–27, 2018; Waikoloa, Hawaii
Session HA: Conference Experience for Undergraduates Poster Session (2:00pm - 3:45pm)
2:00 PM,
Friday, October 26, 2018
Hilton
Room: Grand Promenade
Abstract ID: BAPS.2018.HAW.HA.74
Abstract: HA.00074 : Determining Yields of Fragment Pairs from Californium-252 SF Decays*
Presenter:
Thomas Henry Richards
(University of Alabama, Vanderbilt University)
Authors:
Thomas Henry Richards
(University of Alabama, Vanderbilt University)
Joseph H Hamilton
(Vanderbilt University)
Brooks M Musangu
(Vanderbilt University)
Enhong Wang
(Vanderbilt University)
Jonathan Mark Eldridge
(Vanderbilt University)
Christopher J Zachary
(Vanderbilt University)
Akunuri V Ramayya
(Vanderbilt University)
Christian Brown
(Union University)
Yixiao Luo
(Lawrence Berkeley National Laboratory)
John Ramussen
(Lawrence Berkeley National Laboratory)
Shengjiang Zhu
(Tsinghua University)
Gurgen M Ter-Akopian
(Joint Institute for Nuclear Research)
Yuri Oganessian
(Joint Institute for Nuclear Research)
We analyzed data from the spontaneous fission of californium-252 (Cf-252) to determine yields for the fission partner element pairs tellurium(Z=52)/palladium(Z=46) and strontium(Z=38)/neodymium(Z=60). Previously, the case of barium(Z=56)/molybdenum(Z=42) was shown to have unusually high 8, 9, and 10 neutron emissions, (S.-C. Wu et al.) compared to other element partners seen in the spontaneous fission of Cf-252. With updated level schemes and a larger coincidence dataset, we tested the uniqueness of this case (A.H. Thibeault et al.) by analyzing the neutron channels of the two aforementioned element pairs. Via coincidence counting on γ-γ-γ gates, we measured ground state energy transitions of the studied isotopes to determine the relative yields of all visible isotope partner pairs. We placed the yields in a matrix that quantifies how often two specific isotopes of daughter elements appear in the spontaneous fission of Cf-252. We see that, in our studied elements, the higher neutron channel numbers have negligible yields, confirming the uniqueness of the Ba--Mo case, which may indicate a highly energetic, hyperdeformed Ba-144 nucleus at scission.
*DoE Grant No. DE-FG05-88ER40407 NSF Grant No. 1560035.
To cite this abstract, use the following reference: http://meetings.aps.org/link/BAPS.2018.HAW.HA.74
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