A positive parity sequence of γ transitions has been identified above state ( keV) in $^{115}$Sb through in-beam γ ray spectroscopic technique. Rotational features of this sequence are found similar to a low-K decoupled band. Observation of this newly identified low-K decoupled band, along with the earlier reported strongly coupled high-K band in this nucleus, provides the first experimental evidence for prolate-oblate shape coexistence associated with proton-hole configuration around shell closure. Experimental results are reproduced reasonably well in the frameworks of the projected shell model and the total Routhian surface calculations.
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"value": "A positive parity sequence of <math><mi>\u0394</mi><mi>I</mi><mo>=</mo><mn>2</mn></math> \u03b3 transitions has been identified above <math><msup><mrow><mi>I</mi></mrow><mrow><mi>\u03c0</mi></mrow></msup><mo>=</mo><mn>9</mn><mo>/</mo><msup><mrow><mn>2</mn></mrow><mrow><mo>+</mo></mrow></msup></math> state (<math><msub><mrow><mi>E</mi></mrow><mrow><mi>x</mi></mrow></msub><mo>=</mo><mn>2019</mn></math> keV) in $^{115}$Sb through in-beam \u03b3 ray spectroscopic technique. Rotational features of this sequence are found similar to a low-K decoupled band. Observation of this newly identified low-K decoupled band, along with the earlier reported strongly coupled high-K band in this nucleus, provides the first experimental evidence for prolate-oblate shape coexistence associated with <math><msub><mrow><mi>g</mi></mrow><mrow><mn>9</mn><mo>/</mo><mn>2</mn></mrow></msub></math> proton-hole configuration around <math><mi>Z</mi><mo>=</mo><mn>50</mn></math> shell closure. Experimental results are reproduced reasonably well in the frameworks of the projected shell model and the total Routhian surface calculations."
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