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Evidence of halo structure in Mg37 observed via reaction cross sections and intruder orbitals beyond the island of inversion

M. Takechi et al.
Phys. Rev. C 90, 061305(R) – Published 29 December 2014

Abstract

Precise reaction cross sections (σR) for Mg2438 on C targets at energies around 240 MeV/nucleon have been measured at the Radioactive Isotope Beam Factory at RIKEN. The σR for Mg3638 have been measured for the first time. An enhancement of σR compared to the systematics for spherical stable nuclei has been observed, especially in the neutron-rich region, which reflects the deformation of those isotopes. In the vicinity of the drip line the σR for Mg37 is especially large. It is shown by analysis using a recently developed theoretical method that this prominent enhancement of σR for Mg37 should come from the p-orbital halo formation breaking the N=28 shell gap.

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  • Received 9 January 2014
  • Revised 2 October 2014

DOI:https://doi.org/10.1103/PhysRevC.90.061305

©2014 American Physical Society

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Vol. 90, Iss. 6 — December 2014

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