First evidence of γ collectivity close to the doubly magic core Sn 132

W. Urban; K. Sieja; T. Rzaoca-Urban; M. Czerwiński; H. Naïdja; F. Nowacki; A. G. Smith; I. Ahmad

doi:10.1103/PhysRevC.93.034326

First evidence of γ collectivity close to the doubly magic core Sn 132

W. Urban, K. Sieja, T. Rzaoca-Urban, M. Czerwiński, H. Naïdja, F. Nowacki, A. G. Smith, I. Ahmad

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Abstract

The Te138 and Xe140 nuclei have been reinvestigated using prompt γ-ray data from spontaneous fission of Cm248, collected with the EUROGAM2 Ge array. γ bands have been identified in both nuclei. The γ band observed in Te138, a nucleus with only six valence nucleons, indicates the presence of collectivity very close to the doubly magic Sn132 core. Such band is even more pronounced in Xe140, the N = 86 isotone of Te138. The newly observed bands are interpreted within the shell model, which reproduce well the γ collectivity at N = 86.

Original language	English
Article number	034326
Journal	Physical Review C - Nuclear Physics
Volume	93
Issue number	3
DOIs	https://doi.org/10.1103/PhysRevC.93.034326
Publication status	Published - 21 Mar 2016

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abstract = "The Te138 and Xe140 nuclei have been reinvestigated using prompt γ-ray data from spontaneous fission of Cm248, collected with the EUROGAM2 Ge array. γ bands have been identified in both nuclei. The γ band observed in Te138, a nucleus with only six valence nucleons, indicates the presence of collectivity very close to the doubly magic Sn132 core. Such band is even more pronounced in Xe140, the N = 86 isotone of Te138. The newly observed bands are interpreted within the shell model, which reproduce well the γ collectivity at N = 86.",

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AU - Sieja, K.

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AU - Czerwiński, M.

AU - Naïdja, H.

AU - Nowacki, F.

AU - Smith, A. G.

AU - Ahmad, I.

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AB - The Te138 and Xe140 nuclei have been reinvestigated using prompt γ-ray data from spontaneous fission of Cm248, collected with the EUROGAM2 Ge array. γ bands have been identified in both nuclei. The γ band observed in Te138, a nucleus with only six valence nucleons, indicates the presence of collectivity very close to the doubly magic Sn132 core. Such band is even more pronounced in Xe140, the N = 86 isotone of Te138. The newly observed bands are interpreted within the shell model, which reproduce well the γ collectivity at N = 86.

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First evidence of γ collectivity close to the doubly magic core Sn 132

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