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Ground-state properties of neutron-rich Mg isotopes

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Title: Ground-state properties of neutron-rich Mg isotopes
Authors: Watanabe, S. Browse this author
Minomo, K. Browse this author
Shimada, M. Browse this author
Tagami, S. Browse this author
Kimura, M. Browse this author →KAKEN DB
Takechi, M. Browse this author
Fukuda, M. Browse this author
Nishimura, D. Browse this author
Suzuki, T. Browse this author
Matsumoto, T. Browse this author
Shimizu, Y. R. Browse this author
Yahiro, M. Browse this author
Issue Date: 23-Apr-2014
Publisher: American Physical Society
Journal Title: Physical Review C
Volume: 89
Issue: 4
Start Page: 044610
Publisher DOI: 10.1103/PhysRevC.89.044610
Abstract: We analyze recently measured total reaction cross sections for 24–38Mg isotopes incident on 12C targets at 240 MeV/nucleon by using the folding model and antisymmetrized molecular dynamics (AMD). The folding model well reproduces the measured reaction cross sections, when the projectile densities are evaluated by the deformed Woods-Saxon (def-WS) model with AMD deformation. Matter radii of 24–38Mg are then deduced from the measured reaction cross sections by fine tuning the parameters of the def-WS model. The deduced matter radii are largely enhanced by nuclear deformation. Fully microscopic AMD calculations with no free parameter well reproduce the deduced matter radii for 24–36Mg, but still considerably underestimate them for 37,38Mg. The large matter radii suggest that 37,38Mg are candidates for deformed halo nucleus. AMD also reproduces other existing measured ground-state properties (spin parity, total binding energy, and one-neutron separation energy) of Mg isotopes. Neutron-number (N) dependence of deformation parameter is predicted by AMD. Large deformation is seen from 31Mg with N=19 to a drip-line nucleus 40Mg with N=28, indicating that both the N=20 and 28 magicities disappear. N dependence of neutron skin thickness is also predicted by AMD.
Rights: ©2014 American Physical Society
Type: article
Appears in Collections:理学院・理学研究院 (Graduate School of Science / Faculty of Science) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 木村 真明

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