Remnants of spherical shell structures in deformed nuclei: The impact of an N=64 neutron subshell closure on the structure of N~90 gadolinium nuclei

Journal Article · Tue Jan 01 04:00:00 EST 2013 · Physical Review C

OSTI ID:1092319

Ross, T. J. ^[1]; Hughes, R. O. ^[1]; Beausang, C. W. ^[1]; Allmond, James M ^[2]; Angell, C. T. ^[3]; Basunia, M. S. ^[3]; Bleuel, D. L. ^[4]; Burke, J. T. ^[4]; Casperson, R. J. ^[4]; Escher, J. E. ^[4]; Fallon, P. ^[3]; Hatarik, R. ^[3]; Munson, J. ^[3]; Paschalis, S. ^[3]; Petri, M. ^[3]; Phair, L. ^[3]; Ressler, J. J. ^[4]; Scielzo, N. D. ^[4]

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1. University of Richmond
2. ORNL
3. Lawrence Berkeley National Laboratory (LBNL)
4. Lawrence Livermore National Laboratory (LLNL)

Odd-mass gadolinium isotopes around N = 90 were populated by the (p,d ) reaction, utilizing 25-MeV protons, resulting in population of low-spin quasineutron states at energies near and below the Fermi surface. Systematics of the single quasineutron levels populated are presented. A large excitation energy gap is observed between levels originating from the 2d3/2 , 1h11/2 , and 3s1/2 spherical parents (above the N = 64 gap), and the 2d5/2 (below the gap), indicating that the spherical shell model level spacing is maintained at least to moderate deformations.

• Research Organization: Oak Ridge National Laboratory (ORNL); Holifield Radioactive Ion Beam Facility
• Sponsoring Organization: SC USDOE - Office of Science (SC)
• DOE Contract Number: AC05-00OR22725
• OSTI ID: 1092319
• Journal Information: Physical Review C, Journal Name: Physical Review C Journal Issue: 031301 Vol. 88
• Country of Publication: United States
• Language: English