Nucleus-2024: Fundamental Problems & Applications — Selected Papers of LXXIV Int. Conference (Dubna, Russia) (Part 1); Editor: N. AntonenkoNo Access

Spin scissors mode in actinides

I. V. Molodtsova

Bogoliubov Laboratory of Theoretical Physics, Joint Institute for Nuclear Research, 141980 Dubna, Russia

E-mail Address: molod@theor.jinr.ru

Corresponding author.

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and

E. B. Balbutsev

Bogoliubov Laboratory of Theoretical Physics, Joint Institute for Nuclear Research, 141980 Dubna, Russia

E-mail Address: balbuts@theor.jinr.ru

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https://doi.org/10.1142/S0218301324410167Cited by:0 (Source: Crossref)

Abstract

The scissors mode structure is studied in the actinides within the Wigner Function Moments method. The theory predicts a splitting of the scissors mode into three branches due to spin degrees of freedom. The excitation energies and $B (M 1)$ $B (M 1)$ transition probabilities for the scissors states are calculated for even–even axial nuclei of the actinide mass region. The origin of the double-humped structure of the scissors spectrum observed in the lightest actinides is discussed. The energy centroids and integrated $M 1$ $M 1$ strengths for the transuranium nuclides up to $^{256}$ $^{256}$ No are predicted. The results of calculations for $^{232}$ $^{232}$ Th, $^{238}$ $^{238}$ U and $^{254}$ $^{254}$ No are compared with available experimental data.

Keywords:

PACS: 21.10.Hw, 21.60.Ev, 21.60.Jz, 24.30.Cz

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