Spin distribution of the compound nucleus in heavy ion reactions at near-barrier energies
Technical Report
·
OSTI ID:5966730
Gamma ray multiplicities and the (HI,xn) cross sections for the dominant reaction channel were measured at near-barrier bombarding energies for the systems ..cap alpha.. (15 to 24 MeV) + /sup 154/Sm and /sup 12/C (46 to 61 MeV) + /sup 154/Sm. The mean value of the spin distribution of the compound nucleus was obtained for each of the systems studied. The results of these measurements together with the results of an earlier study on /sup 16/O + /sup 154/Sm indicate that at bombarding energies near and below the Coulomb barrier the spin distributions of the compound nucleus are broader than the triangular distributions expected from a sharp cutoff model, these deviations being larger for the more massive projectiles. The different behavior of the three systems clearly indicates the importance of the centrifugal barrier penetrability in determining the spin distribution of the compound nucleus. The absolute values of the mean angular momentum can be accounted for if one also includes deformation effects. A one-dimensional barrier-penetration model including the effect of averaging over the orientation of the deformed target can account for the experimental results. 29 references.
- Research Organization:
- Washington Univ., Seattle (USA)
- DOE Contract Number:
- AC06-81ER40048
- OSTI ID:
- 5966730
- Report Number(s):
- DOE/ER/40048-118-L4; ON: DE85007846
- Country of Publication:
- United States
- Language:
- English
Similar Records
Spin distribution of the compound nucleus in heavy ion reactions at near-barrier energies
Spin distribution of the compound nucleus in heavy ion reactions at near-barrier energies
How penetrable is the centrifugal barrier for fusion of /sup 16/O with heavy targets
Journal Article
·
Wed May 01 00:00:00 EDT 1985
· Phys. Rev. C; (United States)
·
OSTI ID:5885119
Spin distribution of the compound nucleus in heavy ion reactions at near-barrier energies
Thesis/Dissertation
·
Sat Dec 31 23:00:00 EST 1983
·
OSTI ID:5769474
How penetrable is the centrifugal barrier for fusion of /sup 16/O with heavy targets
Technical Report
·
Thu Dec 31 23:00:00 EST 1981
·
OSTI ID:6335544
Related Subjects
651825* -- Nuclear Properties & Reactions
A=150-189
Experimental-- Nuclear Reactions & Scattering-- (-1987)
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ALPHA REACTIONS
ANGULAR MOMENTUM
CARBON 12 REACTIONS
CHARGED-PARTICLE REACTIONS
COMPOUND NUCLEI
COMPOUND-NUCLEUS REACTIONS
COULOMB ENERGY
CROSS SECTIONS
DATA
DEFORMATION
ELECTROMAGNETIC RADIATION
ENERGY
ENERGY DEPENDENCE
ENERGY RANGE
ENERGY-LEVEL TRANSITIONS
EXPERIMENTAL DATA
FUSION REACTIONS
GAMMA RADIATION
HEAVY ION REACTIONS
INFORMATION
IONIZING RADIATIONS
MEV RANGE
MEV RANGE 10-100
MULTIPLICITY
MULTIPOLE TRANSITIONS
NUCLEAR DEFORMATION
NUCLEAR REACTIONS
NUMERICAL DATA
PARTICLE PROPERTIES
RADIATIONS
SAMARIUM 154 TARGET
SPIN
TARGETS
THEORETICAL DATA
A=150-189
Experimental-- Nuclear Reactions & Scattering-- (-1987)
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ALPHA REACTIONS
ANGULAR MOMENTUM
CARBON 12 REACTIONS
CHARGED-PARTICLE REACTIONS
COMPOUND NUCLEI
COMPOUND-NUCLEUS REACTIONS
COULOMB ENERGY
CROSS SECTIONS
DATA
DEFORMATION
ELECTROMAGNETIC RADIATION
ENERGY
ENERGY DEPENDENCE
ENERGY RANGE
ENERGY-LEVEL TRANSITIONS
EXPERIMENTAL DATA
FUSION REACTIONS
GAMMA RADIATION
HEAVY ION REACTIONS
INFORMATION
IONIZING RADIATIONS
MEV RANGE
MEV RANGE 10-100
MULTIPLICITY
MULTIPOLE TRANSITIONS
NUCLEAR DEFORMATION
NUCLEAR REACTIONS
NUMERICAL DATA
PARTICLE PROPERTIES
RADIATIONS
SAMARIUM 154 TARGET
SPIN
TARGETS
THEORETICAL DATA