An Extended Deformation Model of ^<24>Mg. II : Electromagnetic Properties in the K^π=0^±, 2^+, 3^- Bands

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Four rotational bands (K^π=0^+, 2^+, 0^-, 3^- ) in the low-energy region of ^<24>Mg are investigated with an extended deformation model which treats quadrupole (Y_2) and octupole (Y_3) deformations of the intrinsic one-body field and single-particle modes in it. The K^π=0^± bands are described as the inversion doublet with the lowest configuration in the deformed field and the K^π=2^+ and 3^- bands are constituted by their respective 1p-1h excited configurations. The Y_2 + Y_3-deformation which has been proposed through energy variation is well-substantiated by the electromagnetic properties pertaining to the four bands. The present model successfully reproduces the enhanced E3-transition data between the K^π=0^± bands. The enhancement of these transitions is basically that of the Q3-moment of the intrinsic state which is caused by a collective correlation, i.e., the Y_3-type of the deformation in the intrinsic state. The model also gives a good representation of the observed rotational character, i.e., the strong intra-band E2-transitions as well as the J( J+ 1) rule in the energy spectrum both in the K^π=0^± bands and in the K^π=2^+, 3^- bands with the 1p-1h configurations.
理論物理学刊行会の論文
1981-07-25