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Feb 15 – 18, 2018
Canada/Eastern timezone

High-statistics $\beta$-decay study of collectivity in $^{122}$Xe (student talk)

Feb 16, 2018, 9:30 AM


Badamsambuu Jigmeddorj (University of Guelph)


The evolution of the simple collective signature, the excited first $2^+$ state energy, is extraordinarily smooth for the nuclei in the Z$>$50, N$<$82 region, which is expected to be an ideal region to test collectivity. The study of $^{122}$Xe is a part of a systematic examination of the development of collectivity in the Xe isotopes which are located in the region. Detailed investigations of nuclear structure in the Xe isotopes reveal a pairing vibrational structure influenced by proton subshell gaps. In particular, the $0^+_3$ states in $^{124-132}$Xe are very strongly populated in ($^3$He,n) reactions [1], suggesting a pairing vibrational structure. Recent work on $^{124}$Xe [2] has established nearly identical quadrupole collectivity for the pairing vibrational $0^+_3$ band and the ground state band. The collectivity of excited states in $^{122}$Xe is not well characterized because of a general lack of spectroscopic data for low- and high-spin states, which provide measures of collective properties. The experiment to study $^{122}$Xe with the $\beta^+$/EC decay of $^{122}$Cs was performed at the TRIUMF-ISAC facility located in Vancouver, B.C., Canada. The data collected have enabled the observation of about 505 new transitions and about 250 new levels, including around 145 new high-spin states. The results on the establishment of the $2^+$ band members of the $0^+_2$ and $0^+_3$ bands, observation of important, but previously unobserved, $2^+_2 \rightarrow 0^+_2$ and $2^+_3 \rightarrow 0^+_3$ transitions [3], and the confirmation of the spin of the $0^+_3$ state [4] are reported. In addition, the present work is focused on newly observed high-spin states of $^{122}$Xe. [1] W.P. Alford, ${\it et. al.}$, Nucl. Phys. A${\bf 323}$, 339 (1979). [2] A.J. Radich ${\it et. al.}$, Phys. Rev. C${\bf 91}$, 044320 (2015). [3] B. Jigmeddorj ${\it et. al.}$, Web of Conf. 107, 03014 (2016) [4] B. Jigmeddorj ${\it et. al.}$, Physics Procedia 90 ( 2017 )

Primary author

Badamsambuu Jigmeddorj (University of Guelph)


Adam Garnsworthy (TRIUMF) Allison Radich (University of Guelph) Baharak Hadinia (McMaster University, University of Guelph) Carl Svensson (University of Guelph) Corina Andreoiu (Simon Fraser University) David Cross (Simon Fraser University) Evan Rand (Chalk River Laboratories, University of Guelph) Gordon Ball (TRIUMF) Jason Patk (Lund University, University of British Columbia, TRIUMF) Jennifer Pore (Lawrence Berkeley National Laboratory, Simon Fraser University) John Wood (Georgia Institute of Technology) Mohamad Moukaddam (University of Surrey, TRIUMF) Mustafa Rajabali (Tennessee Technological University, TRIUMF) Paul Garrett (University of Guelph) Philip Voss (Albion College) Steven Yates (University of Kentucky) T Bruhn (Simon Fraser University, TRIUMF) Usman Rizwan (Simon Fraser University) Zhimin Wang (Simon Fraser University, TRIUMF)

Presentation materials