Pseudo Spin Doublet Bands and Gallagher Moszkowski Doublet Bands in $^{100}$Y

Abstract : New transitions in the deformed neutron-rich 100Y uniquely identified using the VAMOS++ spectrometer (A, Z) in conjunction with EXOGAM, produced in fission reactions of 238U on a 9Be target at energies around the barrier are reported. High spin states were obtained from an analysis of the large fold γ coincidence data from the spontaneous fission of 252Cf using the Gammasphere detector array. The new Kπ = 4+ band decaying to an isomeric state (1s) is assigned to be the high-K Gallagher-Moszkowski (GM) partner of the known Kπ = 1+ band, and is also proposed to be the pseudo spin (PS) partner of another new Kπ = 5+ band. Constrained triaxial covariant density functional and quantal particle rotor model calculations for the band structure and electromagnetic transition probabilities are in good agreement with the measurements. The work shows for the first time a coexistance of GM and PS bands in the same nucleus and could point towards a common source of these bands despite their very different origins.
Keywords : Pseudo Spin
Type de document :
Communication dans un congrès
6th International Conference on Fission and Properties of Neutron Rich Nuclei, Nov 2016, Sanibel Island, United States. pp.274-279, 2017, 〈10.1142/9789813229426_0050〉
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https://hal.archives-ouvertes.fr/hal-01669762
Contributeur : Inspire Hep <>
Soumis le : jeudi 21 décembre 2017 - 00:30:04
Dernière modification le : jeudi 11 janvier 2018 - 02:09:35

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E.H. Wang, J.H. Hamilton, A.V. Ramayya, C.J. Zachary, A. Lemasson, et al.. Pseudo Spin Doublet Bands and Gallagher Moszkowski Doublet Bands in $^{100}$Y. 6th International Conference on Fission and Properties of Neutron Rich Nuclei, Nov 2016, Sanibel Island, United States. pp.274-279, 2017, 〈10.1142/9789813229426_0050〉. 〈hal-01669762〉

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