Absence of Low-Energy Shape Coexistence in ^ 80 Ge: The Nonobservation of a Proposed Excited 0_ 2 ^ + Level at 639 keV.
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Abstract | :
The ^{80}Ge structure was investigated in a high-statistics β-decay experiment of ^{80}Ga using the GRIFFIN spectrometer at TRIUMF-ISAC through γ, β-e, e-γ, and γ-γ spectroscopy. No evidence was found for the recently reported 0_{2}^{+} 639-keV level suggested as evidence for low-energy shape coexistence in ^{80}Ge. Large-scale shell model calculations performed in ^{78,80,82}Ge place the 0_{2}^{+} level in ^{80}Ge at 2 MeV. The new experimental evidence combined with shell model predictions indicate that low-energy shape coexistence is not present in ^{80}Ge. |
Year of Publication | :
2020
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Journal | :
Physical review letters
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Volume | :
125
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Issue | :
17
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Number of Pages | :
172501
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Date Published | :
2020
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ISSN Number | :
0031-9007
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URL | :
https://link.aps.org/abstract/PRL/v125/p172501
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DOI | :
10.1103/PhysRevLett.125.172501
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Short Title | :
Phys Rev Lett
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