Intermediate energy proton knockout to the ''island of inversion'' isotope {sup 31}Mg

Journal Article · Fri May 15 04:00:00 EDT 2009 · Physical Review. C, Nuclear Physics

DOI:https://doi.org/10.1103/PHYSREVC.79.054306· OSTI ID:21286934

Miller, D; Brown, B A; Moeller, V; Ratkiewicz, A; Starosta, K; Voss, P ^[1]; Adrich, P; Vaman, C ^[2]; Rother, W ^[3]; Tostevin, J A ^[4]

---

1. Department of Physics and Astronomy, Michigan State University, East Lansing, Michigan 48824 (United States)
2. National Superconducting Cyclotron Laboratory, East Lansing, Michigan 48824 (United States)
3. Institut fuer Kernphysik der Universitaet zu Koeln, D-50937, Koeln (Germany)
4. Department of Physics, Faculty of Engineering and Physical Sciences, University of Surrey, Guildford, Surrey GU2 7XH (United Kingdom)

The ''island of the inversion'' isotope {sup 31}Mg was investigated using an intermediate energy proton knockout reaction from {sup 32}Al at 90 MeV/nucleon at the National Superconducting Cyclotron Laboratory. A negligible cross section to the ground state supports an intruder-dominant configuration in {sup 31}Mg. The partial cross sections to excited final states preferentially populate configurations in the {sup 31}Mg residues which have no neutron excitations across the N=20 shell closure. There is strong evidence that the reaction populates the 3/2{sup +} and 5/2{sup +} states which correspond with the neutron-hole states predicted by the shell model with the model space truncated above the sd-shell.

• OSTI ID: 21286934
• Journal Information: Physical Review. C, Nuclear Physics, Journal Name: Physical Review. C, Nuclear Physics Journal Issue: 5 Vol. 79; ISSN 0556-2813; ISSN PRVCAN
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ALUMINIUM 32
CONFIGURATION
CROSS SECTIONS
EXCITATION
GROUND STATES
KNOCK-OUT REACTIONS
MAGNESIUM 31
MEV RANGE 10-100
NEUTRONS
NITROGEN 20
PROTON REACTIONS
PROTONS
RESIDUES
SHELL MODELS
SUPERCONDUCTING CYCLOTRONS