Role Of Hexadecupole Deformation In The Shape Evolution Of Neutron-rich Nd Isotopes

Abstract : A new isomer with ms half-life was observed in 160Nd at RIBF, RIKEN Nishina Center by using in-flight fission of a 238U beam and a cluster-type Ge detector array, EURICA. The experimental results and a PSM calculation indicate that the isomer in 160Nd is a 2 quasi-particle excitation of neutrons with a configuration of n 1=2[521] n 7=2[633] as the case in other N = 100 isotones. The E(4+)=E(2+) ratio of the ground-state band, 3.29, shows the 160Nd is well deformed and the ground band has a rotational nature. The 4_ excitation of 160Nd showed an increase in energy by -_100 keV compared to that of 162Sm as predicted by the PSM calculation. A PSM calculation was performed by changing input b4 value and confirmed that the large hexadecupole deformation in Nd was responsible for the increase of the isomer energy.
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Poster communications
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Submitted on : Tuesday, May 16, 2017 - 9:14:03 AM
Last modification on : Tuesday, May 22, 2018 - 9:48:11 PM

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  • HAL Id : in2p3-01523034, version 1
  • INSPIRE : 1599131

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Rin Yokoyama, Eiji Ideguchi, G. Simpson, Mana Tanaka, Shunji Nishimura, et al.. Role Of Hexadecupole Deformation In The Shape Evolution Of Neutron-rich Nd Isotopes. International Nuclear Physics Conference (INPC 2016), Sep 2016, Adelaide, Australia. Proceedings of Science, INPC2016, pp.015, 2017. ⟨in2p3-01523034⟩

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