Angular momentum effects in subbarrier fusion
Angular-momentum distributions sigma/sub L/ for the compound nucleus /sup 164/Yb were deduced from measurements of ..gamma..-ray multiplicity for all significant evaporation residues from fusion of /sup 64/Ni and /sup 100/Mo at and below the Coulomb barrier. The excitation functions can be reproduced with coupled-channels calculations only if additional coupling beyond the known inelastic strengths is included. Even with this augmented coupling, however, at the lowest bombarding energies the experimental sigma/sub L/ extend to higher L values than the predictions. Single-barrier penetration models for a potential with an energy-dependent depth and shape fitted to the excitation function likewise underestimate the role of high-L partial waves. Somewhat better success is achieved with models in which fission is allowed to occur at distances comparable with or even larger than the Coulomb barrier radius. 24 refs., 3 figs., 2 tabs.
- Research Organization:
- Oak Ridge National Lab., TN (USA); Washington Univ., St. Louis, MO (USA)
- DOE Contract Number:
- AC05-84OR21400; AC02-76ER04052
- OSTI ID:
- 6996576
- Report Number(s):
- CONF-880896-2; ON: DE88015286; TRN: 88-033037
- Resource Relation:
- Conference: Symposium on heavy-ion reaction dynamics in tandem energy region, Hitachi, Japan, 1 Aug 1988; Other Information: Portions of this document are illegible in microfiche products
- Country of Publication:
- United States
- Language:
- English
Similar Records
Angular momentum effects in subbarrier fusion of sup 64 Ni+ sup 100 Mo
Entry states in subbarrier fusion
Related Subjects
MOLYBDENUM 100 TARGET
NICKEL 64 REACTIONS
YTTERBIUM 164
ANGULAR MOMENTUM
ANGULAR DISTRIBUTION
CALCULATION METHODS
COMPOUND NUCLEI
COULOMB FIELD
COUPLED CHANNEL THEORY
CROSS SECTIONS
ENERGY DEPENDENCE
EXCITATION FUNCTIONS
GAMMA RADIATION
MULTIPLICITY
WOODS-SAXON POTENTIAL
BETA DECAY RADIOISOTOPES
BETA-PLUS DECAY RADIOISOTOPES
CHARGED-PARTICLE REACTIONS
DISTRIBUTION
ELECTRIC FIELDS
ELECTROMAGNETIC RADIATION
EVEN-EVEN NUCLEI
FUNCTIONS
HEAVY ION REACTIONS
HOURS LIVING RADIOISOTOPES
INTERMEDIATE MASS NUCLEI
IONIZING RADIATIONS
ISOTOPES
NUCLEAR POTENTIAL
NUCLEAR REACTIONS
NUCLEI
POTENTIALS
RADIATIONS
RADIOISOTOPES
RARE EARTH ISOTOPES
RARE EARTH NUCLEI
TARGETS
YTTERBIUM ISOTOPES
651720* - Nuclear Properties & Reactions
A=90-149
Experimental
653003 - Nuclear Theory- Nuclear Reactions & Scattering