Alpha-particles as probes of nuclear shape in the rare earths and structure effects on proton emission in the mass 80 region

Conference · Sun Jan 01 00:00:00 EST 1989

OSTI ID:7241604

Sarantites, D G; Nicolis, N G; Abenante, V; Majka, Z; Semkow, T M ^[1]; Baktash, C; Beene, J R; Garcia-Bermudez, G; Halbert, M L; Hensley, D C; Johnson, N R; Lee, I Y; McGowan, F K; Riley, M A; Virtanen, A ^[2]; Griffin, H C ^[3]

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1. Washington Univ., St. Louis, MO (USA). Dept. of Internal Medicine
2. Oak Ridge National Lab., TN (USA)
3. Michigan Univ., Ann Arbor, MI (USA)

Low emission barriers and large subbarrier anisotropies in the alpha-particle decay with respect to the spin direction, of Sn and rare earth compound nuclei, are examined in the light of recent calculations incorporating deformation. For the rare earth systems deformation which increases with spin is necessary to explain the data. Energy spectra and angular correlations of evaporated protons from the {sup 52}Cr({sup 34}S, 2p2n){sup 82}Sr reaction were measured in coincidence with discrete transition. Large changes in the shape of the proton spectra were observed when high spin states in different rotation al bands are populated. These effects cannot be explained by phase space arguments in the deexcitation process. They are interpreted as due to near-yrast to near-yrast stretched proton emission, which preferentially populates the yrast band by subbarrier protons. 20 refs., 8 figs.

• Research Organization: Oak Ridge National Lab., TN (USA)
• Sponsoring Organization: DOE/ER
• DOE Contract Number: AC05-84OR21400; FG02-88ER40406
• OSTI ID: 7241604
• Report Number(s): CONF-8909247-6; ON: DE90007886; TRN: 90-007649
• Resource Relation: Conference: ACS symposium on exotic nuclear spectroscopy, Miami Beach, FL (USA), 11-15 Sep 1989
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
CHROMIUM 52 TARGET
SULFUR 34 REACTIONS
RARE EARTH NUCLEI
NUCLEAR DEFORMATION
ALPHA DECAY
ALPHA PARTICLES
ANGULAR MOMENTUM
COMPOUND NUCLEI
ENERGY SPECTRA
NUCLEAR STRUCTURE
PHASE SPACE
PROTON SPECTRA
TIN
YRAST STATES
CHARGED PARTICLES
CHARGED-PARTICLE REACTIONS
DECAY
DEFORMATION
ELEMENTS
ENERGY LEVELS
HEAVY ION REACTIONS
INTERMEDIATE MASS NUCLEI
MATHEMATICAL SPACE
METALS
NUCLEAR DECAY
NUCLEAR REACTIONS
NUCLEI
SPACE
SPECTRA
TARGETS
651000* - Nuclear Physics