New excitations in 142Ba and 144Ce: Evolution of γ bands in the N = 86 isotones

H. Naïdja; F. Nowacki; B. Bounthong; M. Czerwinski; T. Rząca-Urban; T.  Rogiński; W. Urban; J.  Wiśniewski; K. Sieja; A. G. Smith; J. F. Smith; G. S. Simpson; I. Ahmad; J. P. Greene

doi:10.1103/PhysRevC.95.064303

New excitations in ¹⁴²Ba and ¹⁴⁴Ce: Evolution of γ bands in the N = 86 isotones

H. Naïdja, F. Nowacki, B. Bounthong, M. Czerwinski, T. Rząca-Urban, T. Rogiński, W. Urban, J. Wiśniewski, K. Sieja, A. G. Smith, J. F. Smith, G. S. Simpson, I. Ahmad, J. P. Greene

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Abstract

New excited states in ¹⁴²Ba and ¹⁴⁴Ce are investigated by means of prompt γ-ray spectroscopy of the radiation following spontaneous fission of ²⁵²Cf. Measurements of angular correlations and the observed branchings allowed the assignment of spins and parities with confidence. The new measurements are reinforced by shell-model calculations where energy levels, electric transitions, and magnetic moments are consistent with experimental data. The presence of collectivity in the N = 86 isotones is confirmed by clear signatures of soft triaxial γ bands in both nuclei.

Original language	English
Article number	064303
Journal	Physical Review C
Volume	95
DOIs	https://doi.org/10.1103/PhysRevC.95.064303
Publication status	Published - 2 Jun 2017
Externally published	Yes

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2017 03 24 Naidja et al Excitations finalFinal published version, 1.2 MBLicence: CC BY-NC-ND

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Naïdja, H., Nowacki, F., Bounthong, B., Czerwinski, M., Rząca-Urban, T., Rogiński, T., Urban, W., Wiśniewski, J., Sieja, K., Smith, A. G., Smith, J. F., Simpson, G. S., Ahmad, I., & Greene, J. P. (2017). New excitations in ¹⁴²Ba and ¹⁴⁴Ce: Evolution of γ bands in the N = 86 isotones. Physical Review C, 95, Article 064303. https://doi.org/10.1103/PhysRevC.95.064303

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title = "New excitations in 142Ba and 144Ce: Evolution of γ bands in the N = 86 isotones",

abstract = "New excited states in 142Ba and 144Ce are investigated by means of prompt γ-ray spectroscopy of the radiation following spontaneous fission of 252Cf. Measurements of angular correlations and the observed branchings allowed the assignment of spins and parities with confidence. The new measurements are reinforced by shell-model calculations where energy levels, electric transitions, and magnetic moments are consistent with experimental data. The presence of collectivity in the N = 86 isotones is confirmed by clear signatures of soft triaxial γ bands in both nuclei.",

author = "H. Na{\"i}dja and F. Nowacki and B. Bounthong and M. Czerwinski and T. Rz{\c a}ca-Urban and T. Rogi{\'n}ski and W. Urban and J. Wi{\'s}niewski and K. Sieja and Smith, {A. G.} and Smith, {J. F.} and Simpson, {G. S.} and I. Ahmad and Greene, {J. P.}",

year = "2017",

month = jun,

day = "2",

doi = "10.1103/PhysRevC.95.064303",

language = "English",

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T2 - Evolution of γ bands in the N = 86 isotones

AU - Naïdja, H.

AU - Nowacki, F.

AU - Bounthong, B.

AU - Czerwinski, M.

AU - Rząca-Urban, T.

AU - Rogiński, T.

AU - Urban, W.

AU - Wiśniewski, J.

AU - Sieja, K.

AU - Smith, A. G.

AU - Smith, J. F.

AU - Simpson, G. S.

AU - Ahmad, I.

AU - Greene, J. P.

PY - 2017/6/2

Y1 - 2017/6/2

N2 - New excited states in 142Ba and 144Ce are investigated by means of prompt γ-ray spectroscopy of the radiation following spontaneous fission of 252Cf. Measurements of angular correlations and the observed branchings allowed the assignment of spins and parities with confidence. The new measurements are reinforced by shell-model calculations where energy levels, electric transitions, and magnetic moments are consistent with experimental data. The presence of collectivity in the N = 86 isotones is confirmed by clear signatures of soft triaxial γ bands in both nuclei.

AB - New excited states in 142Ba and 144Ce are investigated by means of prompt γ-ray spectroscopy of the radiation following spontaneous fission of 252Cf. Measurements of angular correlations and the observed branchings allowed the assignment of spins and parities with confidence. The new measurements are reinforced by shell-model calculations where energy levels, electric transitions, and magnetic moments are consistent with experimental data. The presence of collectivity in the N = 86 isotones is confirmed by clear signatures of soft triaxial γ bands in both nuclei.

U2 - 10.1103/PhysRevC.95.064303

DO - 10.1103/PhysRevC.95.064303

M3 - Article

SN - 2469-9985

VL - 95

JO - Physical Review C

JF - Physical Review C

M1 - 064303

ER -

New excitations in 142Ba and 144Ce: Evolution of γ bands in the N = 86 isotones

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New excitations in ¹⁴²Ba and ¹⁴⁴Ce: Evolution of γ bands in the N = 86 isotones