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 )
