4.2 Article

Band structures in near spherical 138Ce

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NUCLEAR PHYSICS A
卷 825, 期 1-2, 页码 16-38

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DOI: 10.1016/j.nuclphysa.2009.04.007

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NUCLEAR REACTIONS Te-130(C-12, 4n), E=65 MeV; measured E-gamma, I-gamma, gamma gamma; deduced DCO ratio, PDCO, J, pi; Clover detector array; Shell model and TRS calculations

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The high spin states of N = 80 Ce-138 have been populated in the fusion evaporation reaction Te-130(C-12, 4n)Ce-138 at E-beam = 65 MeV. The gamma transitions belonging to various band structures were detected and characterized using an array of five Clover Germanium detectors. The level scheme has been established up to a maximum spin and excitation energy of 23h and 9511.3 keV, respectively, by including 53 new transitions. The negative parity Delta I = 1 band, developed on the 6536.3 keV 15(-) level, has been conjectured to be a magnetic rotation band following a semiclassical analysis and comparing the systematics of similar bands in the neighboring nuclei. The said band is proposed to have a four quasiparticle configuration of vertical bar pi g(7/2)h(11/2)vertical bar circle times vertical bar nu h(11/2)vertical bar(-2). Other band structures are interpreted in terms of multi-quasiparticle configurations, based on Total Routhian Surface (TRS) calculations. For the low and medium spin states, a shell model calculation using a realistic two body interaction has been performed using the code OXBASH. (C) 2009 Elsevier B.V. All rights reserved.

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Electromagnetic properties of A hypernuclei with a beyond relativistic mean-field approach

Y. G. Yao, X. Y. Wu, H. Mei

Summary: This study presents a microscopic investigation of the electromagnetic properties of the low-lying states of single-A hypernucleus 9ABe using the HyperGCM method based on covariant density functional theory. The results are compared to those of a particle-rotor model (PRM) and show close agreement. It is found that the electric quadrupole transition strengths are more sensitive to the coupling strengths of the AN interaction than the magnetic moments and M 1 transition strengths.

NUCLEAR PHYSICS A (2024)