Nonequilibrium emission of neutrons from fusion-like reactions of 152-MeV /sup 16/O with /sup 154/Sm
Journal Article
·
· Phys. Rev. C; (United States)
Neutron time-of-flight spectra and angular correlations were obtained in coincidence with ..gamma.. rays characteristic of the xn (x = 8,9,10) and ..cap alpha..xn (x = 7,8) fusion-like products in reactions of 151.9 MeV /sup 16/O with /sup 154/Sm. The spectra at all angles (20/sup 0/, 70/sup 0/, 100/sup 0/, 151/sup 0/) clearly indicate the presence of nonequilibrium neutron emission. The energy spectra can be represented in terms of isotropic emission in the rest frames of two moving sources. The slower of these moves with the speed of the center of mass; its emission corresponds to a temperature of approx.1.7 MeV. The faster source, characterized by a temperature of 5 to 6 MeV, has a velocity of approx.0.4 of that corresponding to the projectile energy above the Coulomb barrier. The yield of fast neutrons as a function of the exit channel is found to be in good agreement with the predictions of an extended incomplete fusion model. Comparisons are made with other models that lead to emission of fast neutrons.
- Research Organization:
- Department of Chemistry, Washington University, St. Louis, Missouri 63130
- OSTI ID:
- 6438520
- Journal Information:
- Phys. Rev. C; (United States), Journal Name: Phys. Rev. C; (United States) Vol. 23:6; ISSN PRVCA
- Country of Publication:
- United States
- Language:
- English
Similar Records
Fusion-like reactions of /sup 16/O with /sup 154/Sm:. gamma. -ray multiplicity versus bombarding energy
TRANSITION ENERGIES AND NUCLEAR LEVELS IN Sm$sup 152$, Sm$sup 154$, Gd$sup 152$, AND Gd$sup 154$ AS DERIVED FROM THE SEPARATED ISOTOPES OF EUROPIUM
Measurements of E4 matrix elements in $sup 152$Sm and $sup 154$Sm
Journal Article
·
Mon Jun 01 00:00:00 EDT 1981
· Phys. Rev. C; (United States)
·
OSTI ID:6330818
TRANSITION ENERGIES AND NUCLEAR LEVELS IN Sm$sup 152$, Sm$sup 154$, Gd$sup 152$, AND Gd$sup 154$ AS DERIVED FROM THE SEPARATED ISOTOPES OF EUROPIUM
Journal Article
·
Sun Sep 15 00:00:00 EDT 1957
· Physical Review (U.S.) Superseded in part by Phys. Rev. A, Phys. Rev. B: Solid State, Phys. Rev. C, and Phys. Rev. D
·
OSTI ID:4334125
Measurements of E4 matrix elements in $sup 152$Sm and $sup 154$Sm
Journal Article
·
Sun Dec 31 23:00:00 EST 1972
· Z. Phys., v. 263, no. 3, pp. 191-200
·
OSTI ID:4417386
Related Subjects
651825* -- Nuclear Properties & Reactions
A=150-189
Experimental-- Nuclear Reactions & Scattering-- (-1987)
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ANGULAR CORRELATION
CHARGED-PARTICLE REACTIONS
COINCIDENCE SPECTROMETRY
COMPOUND-NUCLEUS REACTIONS
CORRELATIONS
COULOMB FIELD
CROSS SECTIONS
DATA
ELECTRIC FIELDS
ELECTROMAGNETIC RADIATION
ELEMENTS
EMISSION
ENERGY RANGE
ENERGY SPECTRA
ERBIUM
EXPERIMENTAL DATA
FUSION REACTIONS
GAMMA RADIATION
HEAVY ION REACTIONS
INFORMATION
IONIZING RADIATIONS
METALS
MEV RANGE
MEV RANGE 100-1000
NEUTRON EMISSION
NUCLEAR REACTIONS
NUMERICAL DATA
OXYGEN 16 REACTIONS
RADIATIONS
RARE EARTHS
SAMARIUM 154 TARGET
SPECTRA
TARGETS
TIME-OF-FLIGHT METHOD
YTTERBIUM
A=150-189
Experimental-- Nuclear Reactions & Scattering-- (-1987)
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ANGULAR CORRELATION
CHARGED-PARTICLE REACTIONS
COINCIDENCE SPECTROMETRY
COMPOUND-NUCLEUS REACTIONS
CORRELATIONS
COULOMB FIELD
CROSS SECTIONS
DATA
ELECTRIC FIELDS
ELECTROMAGNETIC RADIATION
ELEMENTS
EMISSION
ENERGY RANGE
ENERGY SPECTRA
ERBIUM
EXPERIMENTAL DATA
FUSION REACTIONS
GAMMA RADIATION
HEAVY ION REACTIONS
INFORMATION
IONIZING RADIATIONS
METALS
MEV RANGE
MEV RANGE 100-1000
NEUTRON EMISSION
NUCLEAR REACTIONS
NUMERICAL DATA
OXYGEN 16 REACTIONS
RADIATIONS
RARE EARTHS
SAMARIUM 154 TARGET
SPECTRA
TARGETS
TIME-OF-FLIGHT METHOD
YTTERBIUM