New features of shape coexistence in Sm152

P. E. Garrett; W. D. Kulp; J. L. Wood; D. Bandyopadhyay; S. Choudry; D. Dashdorj; S. R. Lesher; M. T. McEllistrem; M. Mynk; J. N. Orce; S. W. Yates

doi:10.1103/PhysRevLett.103.062501

New features of shape coexistence in Sm152

P. E. Garrett, W. D. Kulp, J. L. Wood, D. Bandyopadhyay, S. Choudry, D. Dashdorj, S. R. Lesher, M. T. McEllistrem, M. Mynk, J. N. Orce, S. W. Yates

Chemistry

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Abstract

Excited states in Sm152 have been investigated with the Sm152(n,n′γ) reaction. The lowest four negative-parity band structures have been characterized in detail with respect to their absolute decay properties. Specifically, a new Kπ=0- band has been assigned with its 1- band head at 1681keV. This newly observed band has a remarkable similarity in its E1 transition rates for decay to the first excited Kπ=0+ band at 684keV to the lowest Kπ=0- band and its decay to the ground-state band. Based on these decay properties, as well as energy considerations, this new band is assigned as a Kπ=0- octupole excitation based on the Kπ=02+ state. An emerging pattern of repeating excitations built on the 02+ level similar to those built on the groundstate may indicate that Sm152 is a complex example of shape coexistence rather than a critical point nucleus.

Original language	English
Article number	062501
Journal	Physical Review Letters
Volume	103
Issue number	6
DOIs	https://doi.org/10.1103/PhysRevLett.103.062501
State	Published - Aug 5 2009

ASJC Scopus subject areas

General Physics and Astronomy

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10.1103/PhysRevLett.103.062501

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abstract = "Excited states in Sm152 have been investigated with the Sm152(n,n′γ) reaction. The lowest four negative-parity band structures have been characterized in detail with respect to their absolute decay properties. Specifically, a new Kπ=0- band has been assigned with its 1- band head at 1681keV. This newly observed band has a remarkable similarity in its E1 transition rates for decay to the first excited Kπ=0+ band at 684keV to the lowest Kπ=0- band and its decay to the ground-state band. Based on these decay properties, as well as energy considerations, this new band is assigned as a Kπ=0- octupole excitation based on the Kπ=02+ state. An emerging pattern of repeating excitations built on the 02+ level similar to those built on the groundstate may indicate that Sm152 is a complex example of shape coexistence rather than a critical point nucleus.",

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AU - Garrett, P. E.

AU - Kulp, W. D.

AU - Wood, J. L.

AU - Bandyopadhyay, D.

AU - Choudry, S.

AU - Dashdorj, D.

AU - Lesher, S. R.

AU - McEllistrem, M. T.

AU - Mynk, M.

AU - Orce, J. N.

AU - Yates, S. W.

PY - 2009/8/5

Y1 - 2009/8/5

N2 - Excited states in Sm152 have been investigated with the Sm152(n,n′γ) reaction. The lowest four negative-parity band structures have been characterized in detail with respect to their absolute decay properties. Specifically, a new Kπ=0- band has been assigned with its 1- band head at 1681keV. This newly observed band has a remarkable similarity in its E1 transition rates for decay to the first excited Kπ=0+ band at 684keV to the lowest Kπ=0- band and its decay to the ground-state band. Based on these decay properties, as well as energy considerations, this new band is assigned as a Kπ=0- octupole excitation based on the Kπ=02+ state. An emerging pattern of repeating excitations built on the 02+ level similar to those built on the groundstate may indicate that Sm152 is a complex example of shape coexistence rather than a critical point nucleus.

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New features of shape coexistence in Sm152

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