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arXiv · 1109.2060

Shape fluctuations in the ground and excited 0+ states of 30Mg and 32Mg

Nobuo Hinohara·Koichi Sato·Kenichi Yoshida·Takashi Nakatsukasa·Masayuki Matsuo·Kenichi Matsuyanagi
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Abstract

Large-amplitude collective dynamics of shape phase transition in the low-lying states of 30-36Mg is investigated by solving the five-dimensional (5D) quadrupole collective Schroedinger equation. The collective masses and potentials of the 5D collective Hamiltonian are microscopically derived with use of the constrained Hartree-Fock-Bogoliubov plus local quasiparticle RPA method. Good agreement with the recent experimental data is obtained for the excited 0+ states as well as the ground bands. For 30Mg, the shape coexistence picture that the deformed excited 0+ state coexists with the spherical ground state approximately holds. On the other hand, large-amplitude quadrupole-shape fluctuations dominate in both the ground and the excited 0+ states in 32Mg, so that the interpretation of 'coexisting spherical excited 0+ state' based on the naive inversion picture of the spherical and deformed configurations does not hold.

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Nobuo Hinohara, Koichi Sato, Kenichi Yoshida, Takashi Nakatsukasa, Masayuki Matsuo, Kenichi Matsuyanagi. 2011-09-09. Shape fluctuations in the ground and excited 0+ states of 30Mg and 32Mg. https://doi.org/10.1103/physrevc.84.061302

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