Abstract
The level structure of 137La has been studied using the 138Ba(p, 2n) reaction and methods of in-beam γ-ray and conversion-electron spectroscopy. The 137La level scheme has been established with 21 new levels with spins up to 19 2 −1 . A 360 ns 19 2 −1 isomer at 1870 keV has been identified and a (π g 7 2 (ν h −1 11 2 d − 3 2 ) 7 − ) 19 2 − configuration is suggested for it. The level ordering of the π h 11 2 ×2 + multiplet has been discussed on the basis of the triaxial rotor-plus-particle model which suggests a slightly oblate triaxial shape to the 137La nucleus.
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