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Multiple triaxial bands in $$^{138}$$Nd

$$^{138}$$Ndの多重極三軸バンド構造

Petrache, C. M.*; Ragnarsson, I.*; Ma, H.-L.*; L$'e$guillon, R.; Zerrouki, T.*; Bazzacco, D.*; Lunardi, S.*

Petrache, C. M.*; Ragnarsson, I.*; Ma, H.-L.*; L$'e$guillon, R.; Zerrouki, T.*; Bazzacco, D.*; Lunardi, S.*

High-spin states in $$^{138}$$Nd were investigated by using the $$^{48}$$Ca + $$^{94}$$Zr reaction and $$gamma$$-ray coincidence measurements were carried out with the GASP spectrometer. A rich level scheme was developed including 14 new bands of quadrupole transitions at very high spins. Linking transitions connecting 11 high-spin bands to low-energy states have been observed. Calculations based on the cranked Nilsson-Strutinsky formalism have been used to assign configurations to the observed bands. The main result of these calculations is that all 14 bands exhibit a stable triaxial deformation up to the highest observed spins, giving strong support to the existence of a triaxial minimum with normal deformation and positive asymmetry parameter in nuclei with a few holes in the $$N$$ = 82 shell closure.

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パーセンタイル:12.26

分野:Physics, Nuclear

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