Excited intruder states in {sup 32}Mg

Journal Article · Sat Mar 15 04:00:00 EDT 2008 · Physical Review. C, Nuclear Physics

DOI:https://doi.org/10.1103/PHYSREVC.77.034310· OSTI ID:21189828

Tripathi, Vandana; Tabor, S L; Bender, P; Hoffman, C R; Lee, Sangjin; Pepper, K; Perry, M; Utsuno, Y; Otsuka, T ^[1]; Mantica, P F; Pinter, J S; Stoker, J B ^[2]; Cook, J M ^[2]; Pereira, J; Weisshaar, D ^[2]

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1. Department of Physics, Florida State University, Tallahassee, Florida 32306 (United States)
2. National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824 (United States)

The low energy level structure of N=20 {sup 32}Mg obtained via {beta}-delayed {gamma} spectroscopy is reported. The level structure of {sup 32}Mg is found to be completely dominated by intruders. An inversion between the 1p-1h and 3p-3h states is observed for the negative parity states, similar to the 0p-0h and 2p-2h inversion for the positive parity states in these N{approx}20 nuclei. The intruder excited states, both positive and negative parity, are reasonably explained by Monte Carlo shell model calculations, which suggest a shrinking N=20 shell gap with decreasing Z.

• OSTI ID: 21189828
• Journal Information: Physical Review. C, Nuclear Physics, Journal Name: Physical Review. C, Nuclear Physics Journal Issue: 3 Vol. 77; ISSN 0556-2813; ISSN PRVCAN
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
EXCITED STATES
GAMMA SPECTROSCOPY
MAGNESIUM 32
MONTE CARLO METHOD
SHELL MODELS
SIMULATION