New level scheme and shell model description of the near-spherical nucleus <math><mmultiscripts><mi>Nb</mi><mprescripts/><none/><mn>94</mn></mmultiscripts></math>

Li, Y.Q.; Li, C.B.; Zheng, Y.; Li, T.X.; Wu, X.G.; Hong, R.; Guan, S.X.; Wu, H.Y.; Zheng, M.; Zhao, Z.H.

doi:10.1103/PhysRevC.110.054309

New level scheme and shell model description of the near-spherical nucleus ${}^{94}{Nb}$

Nov 12, 2024

11 pages

Published in:

Phys.Rev.C 110 (2024) 5, 054309

Published: Nov 12, 2024

DOI:

10.1103/PhysRevC.110.054309 (publication)

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Abstract: (APS)

High-spin states of

{}^{94}{Nb}

have been studied by in-beam

γ

-ray spectroscopic methods using the

{}^{82}{Se} ({}^{18}O, p 5 n) {}^{94}{Nb}

reaction at beam energies of 82 and 88 MeV. Particle-

γ - γ

coincidence measurements using CsI and high-purity germanium arrays are employed to gain selectivity to Nb isotopic products. The level scheme of

{}^{94}{Nb}

has been extended up to excitation energy

\approx 11 MeV

and spin

24 ℏ

with the addition of 20 new

γ

transitions, and the placement of some of the previously known transitions has been revised. The energy spectrum bears signature of core breaking, viz., presence of high energy (

E_{γ} \approx 2 MeV

)

γ

rays originating due to excitation of nucleons across the shell gaps. The proposed level scheme is compared with large basis spherical shell model calculations using the GWBXG and SNET interactions.

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New level scheme and shell model description of the near-spherical nucleus Nb94

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New level scheme and shell model description of the near-spherical nucleus ${}^{94}{Nb}$