Seniority structure of $^{136}$Xe$_{82}$

E.E. Peters , P. van Isacker (1) , A. Chakraborty , B.P. Crider , A. Kumar , S.H. Liu , M.T. Mcellistrem , C.V. Mehl , F.M. Prados-Estévez , T.J. Ross , J.L. Wood , S.W. Yates

1 GANIL - Grand Accélérateur National d'Ions Lourds

The level structure of the N=82 nucleus Xe136 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 Xe136 was used to identify the seniority structure of the low-lying levels and to assign (π0g7/2)υ=04, (π0g7/2)υ=24, (π0g7/2)υ=44, (π1d5/2)(π0g7/2)υ=13, and (π1d5/2)2(π0g7/2)υ=02 configurations to describe all observed states below 2.8 MeV.

Mots clés: Nuclear Structure

Domaines: Physique Nucléaire Théorique [nucl-th]

E.E. Peters, P. van Isacker, A. Chakraborty, B.P. Crider, A. Kumar, et al.. Seniority structure of $^{136}$Xe$_{82}$. Phys.Rev.C, 2018, 98 (3), pp.034302. ⟨10.1103/PhysRevC.98.034302⟩. ⟨hal-01876267⟩