Low-lying states in Mg32 studied by proton inelastic scattering

S. Takeuchi et al.
Phys. Rev. C 79, 054319 – Published 15 May 2009

Abstract

Proton inelastic scattering on the neutron-rich nucleus Mg32 has been studied at 46.5 MeV/nucleon in inverse kinematics. Populated states were identified by measuring de-excitation γ rays, in which five new states were found by γγ coincidence analyses. By analyzing the angular differential cross sections via coupled-channel calculations, their spins and parities were constrained and the amplitudes for each transition were extracted. The spin and parity of the 2321-keV state was assigned as 41+. The ratio between the energies of the 21+ and 41+ states indicates that Mg32 is a transitional nucleus rather than an axially deformed rigid rotor. The collectivities in the nucleus Mg32 with N=20 are discussed based on the results obtained in the present experiment.

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  • Received 15 April 2009

DOI:https://doi.org/10.1103/PhysRevC.79.054319

©2009 American Physical Society

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Vol. 79, Iss. 5 — May 2009

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