Study of parity-doublet structure in the 147 La nucleus

J. Wiśniewski; W. Urban; T. Rząca-urban; A. G. Smith; J. F. Smith; G. S. Simpson; I. Ahmad; J. P. Greene; U. Köster

doi:10.1051/epjconf/201819305006

Study of parity-doublet structure in the ¹⁴⁷La nucleus

J. Wiśniewski
, W. Urban
, T. Rząca-urban
, A. G. Smith
, J. F. Smith
, G. S. Simpson
, I. Ahmad
, J. P. Greene
, U. Köster

Research output: Contribution to journal › Article › peer-review

1 Citation (Scopus)

Abstract

The work reports several new excited states in the neutron-rich 147La nucleus, populated in spontaneous fission of 252Cf. The excitation scheme has been reinvestigated by means of γ-ray spectroscopy, using high-fold γ coincidences measured with the Gammasphere array of Ge detectors. It is shown that the 229.65-keV level has spin and parity 11/2−, which changes the 9/2− spin-parity reported in a recent evaluation and sets up the spinparity of the ground state as 5/2+. New levels allow to arrange the excitation scheme of 147La into a parity-doublet-like structure showing that the 147La nucleus may have an octupole deformation.

Original language	English
Article number	05006
Number of pages	7
Journal	EPJ Web of Conferences
Volume	193
DOIs	https://doi.org/10.1051/epjconf/201819305006
Publication status	Published - 1 Jan 2018

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10.1051/epjconf/201819305006Licence: CC BY

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title = "Study of parity-doublet structure in the 147 La nucleus",

abstract = "The work reports several new excited states in the neutron-rich 147La nucleus, populated in spontaneous fission of 252Cf. The excitation scheme has been reinvestigated by means of γ-ray spectroscopy, using high-fold γ coincidences measured with the Gammasphere array of Ge detectors. It is shown that the 229.65-keV level has spin and parity 11/2−, which changes the 9/2− spin-parity reported in a recent evaluation and sets up the spinparity of the ground state as 5/2+. New levels allow to arrange the excitation scheme of 147La into a parity-doublet-like structure showing that the 147La nucleus may have an octupole deformation.",

author = "J. Wi{\'s}niewski and W. Urban and T. Rz{\c a}ca-urban and Smith, \{A. G.\} and Smith, \{J. F.\} and Simpson, \{G. S.\} and I. Ahmad and Greene, \{J. P.\} and U. K{\"o}ster",

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doi = "10.1051/epjconf/201819305006",

language = "English",

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T1 - Study of parity-doublet structure in the 147 La nucleus

AU - Wiśniewski, J.

AU - Urban, W.

AU - Rząca-urban, T.

AU - Smith, A. G.

AU - Smith, J. F.

AU - Simpson, G. S.

AU - Ahmad, I.

AU - Greene, J. P.

AU - Köster, U.

PY - 2018/1/1

Y1 - 2018/1/1

N2 - The work reports several new excited states in the neutron-rich 147La nucleus, populated in spontaneous fission of 252Cf. The excitation scheme has been reinvestigated by means of γ-ray spectroscopy, using high-fold γ coincidences measured with the Gammasphere array of Ge detectors. It is shown that the 229.65-keV level has spin and parity 11/2−, which changes the 9/2− spin-parity reported in a recent evaluation and sets up the spinparity of the ground state as 5/2+. New levels allow to arrange the excitation scheme of 147La into a parity-doublet-like structure showing that the 147La nucleus may have an octupole deformation.

AB - The work reports several new excited states in the neutron-rich 147La nucleus, populated in spontaneous fission of 252Cf. The excitation scheme has been reinvestigated by means of γ-ray spectroscopy, using high-fold γ coincidences measured with the Gammasphere array of Ge detectors. It is shown that the 229.65-keV level has spin and parity 11/2−, which changes the 9/2− spin-parity reported in a recent evaluation and sets up the spinparity of the ground state as 5/2+. New levels allow to arrange the excitation scheme of 147La into a parity-doublet-like structure showing that the 147La nucleus may have an octupole deformation.

U2 - 10.1051/epjconf/201819305006

DO - 10.1051/epjconf/201819305006

M3 - Article

SN - 2100-014X

VL - 193

JO - EPJ Web of Conferences

JF - EPJ Web of Conferences

M1 - 05006

ER -

Study of parity-doublet structure in the 147 La nucleus

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Study of parity-doublet structure in the ¹⁴⁷La nucleus