The level structure of the N = 82 nucleus 136Xe was studied with the inelastic neutron scattering reaction followed by γ-ray detection. A number of the spins and parities were reassigned, and many level lifetimes were determined for the first time using the Doppler-shift attenuation method. New shell-model calculations were also performed using both the full Z = 50–82 model space, and a reduced model space including only the 1d5/2 and 0g7/2 orbitals. This new information characterizing 136Xe was used to identify the seniority structure of the low-lying levels and to assign (π0g7/2)4υ=0, (π0g7/2)4υ=2, (π0g7/2)4υ=4, (π1d5/2)(π0g7/2)3υ=1, and (π1d5/2)2(π0g7/2)2υ=0 configurations to describe all observed states below 2.8 MeV.
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This material is based upon work supported by the U.S. National Science Foundation under Grant No. PHY-1606890.
Peters, Erin E.; Van Isacker, P.; Chakraborty, Anagha; Crider, Benjamin P.; Kumar, A.; Liu, S. H.; McEllistrem, Marcus T.; Mehl, C. V.; Prados-Estévez, Francisco M.; Ross, T. J.; Wood, J. L.; and Yates, Steven W., "Seniority Structure of 136Xe82" (2018). Chemistry Faculty Publications. 134.