Phenomenological weak-coupling analysis on N = 81 isotones

doi:10.1016/0375-9474(83)90352-4

Nuclear Physics A

Volume 408, Issue 1, 24 October 1983, Pages 109-126

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Abstract

A phenomenological np weak-coupling model is applied to N = 81 isotones. The energy spectra, stripping spectroscopic factors and electromagnetic transition probabilities are calculated and compared with experimental data. It is shown that the energy spectra and the spectroscopic factors can be reproduced quite well. The structures of the wave functions are analyzed. The discrepancies between the calculated and experimental transition probabilities suggest that the configuration mixings of the calculated wave functions are too small. The results of the calculation indicate that this model is a very efficient truncation scheme and suggest that its domain of applicability may be extended.

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Cited by (3)

Nuclear Data Sheets for A = 135
2008, Nuclear Data Sheets
The evaluated experimental data are presented for 17 known nuclides of mass 135 (In, Sn, Sb, Te, I, Xe, Cs, Ba, La, Ce, Pr, Nd, Pm, Sm, Eu, Gd, Tb). For ¹³⁵In, ¹³⁵Eu, ¹³⁵Gd and ¹³⁵Tb, only the half-lives and isotopic identifications are established without any knowledge of their level structures and β decay schemes. Extensive high-spin structures are known for ¹³⁵Te, ¹³⁵I, ¹³⁵Ba, ¹³⁵La, ¹³⁵Ce, ¹³⁵Pr, ¹³⁵Nd, ¹³⁵Pm and ¹³⁵Sm; including a superdeformed structure in ¹³⁵Nd. Only limited high-spin data are available for ¹³⁵Sb and the data for ¹³⁵La are from a thesis only. Neutron capture γ-ray data are available in detail for ¹³⁵Ba (thermal and resonance energies) and marginally for ¹³⁵Cs (thermal neutrons). Single particle-transfer data exist for ¹³⁵Xe and ¹³⁵Ba; and marginally for ¹³⁵I and ¹³⁵La. In the opinion of the evaluators, the decay schemes from β decays of ¹³⁵Sn, ¹³⁵Xe, ¹³⁵Pr, ¹³⁵Pm isomers and ¹³⁵Sm are not well established. The absolute level energies in ¹³⁵Pm and ¹³⁵Sm are not known. This work supersedes earlier (1998Se07,1987Se11,1975He12) evaluations of A = 135.
Nuclear data sheets for A = 135
1998, Nuclear Data Sheets
The evaluated experimental data are presented for 15 known nuclides of mass 135 (Sn, Sb, Te, I, Xe, Cs, Ba, La, Ce, Pr, Nd, Pm, Sm, Eu, Gd). Excited state data are nonexistent for¹³⁵Sn,¹³⁵Sb,¹³⁵Eu and¹³⁵Gd. High spin excitations are known for¹³⁵Te,¹³⁵I,¹³⁵Ba,¹³⁵La,¹³⁵Ce,¹³⁵Pr,¹³⁵Nd,¹³⁵Pm and¹³⁵Sm; including a superdeformed structure in¹³⁵Nd. Neutron capture γ-ray data are available for¹³⁵Ba (thermal and resonance neutrons) and¹³⁵Cs (thermal neutrons). Single particle-transfer data exist for¹³⁵I,¹³⁵Xe,¹³⁵Ba and¹³⁵La. Nuclides¹³⁵In and¹³⁵Cd have not yet been identified but included in theoretial calculations of 96Bo11 and 97Bo24, respectively. The¹³⁵In nuclide islisted with T_1/2(from syst) = 100 ms (97Au04), 89 ms (97Mo25) and Jπ (from syst) = 9/2+ (97Au04, 97Mo25). This work supersedes earlier (87Se11, 75He12) evaluations of A = 135.
Neutron-proton weak coupling: Reducing shell-model dimensions by truncations in the neutron and proton subspaces
1989, Physical Review C

^☆: Work supported by the National Science Council of the Republic of China.

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Phenomenological weak-coupling analysis on N = 81 isotones☆

Abstract

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