Angular distributions and differential ranges of Ba products from the interaction of /sup 238/U with 0. 8--400-GeV protons
Journal Article
·
· Phys. Rev., C; (United States)
Angular distributions and differential ranges at 90/sup 0/ to the beam of /sup 128/Ba, /sup 131/Ba, /sup 135/Ba/sup m/, and /sup 140/Ba emitted in the interaction of /sup 238/U with 0.8--400 GeV protons have been measured. The angular distributions of /sup 128/Ba and /sup 131/Ba change from forward-peaked to sideward-peaked between 3 and 11.5 GeV, while those of /sup 135/Ba/sup m/ and /sup 140/Ba are sideward-peaked and independent of bombarding energy in the above regime. Momentum distributions of all products are Gaussian at 0.8 GeV with a mean value increasing from 120 (MeV A)/sup 1/2/ for /sup 128/Ba to 139 (MeV A)/sup 1/2/ for /sup 140/Ba. The momenta of the neutron-deficient products decrease by nearly a factor of 2 with increasing proton energy and the distributions broaden and become asymmetric. On the other hand, the momentum distributions of /sup 135/Ba/sup m/ and /sup 140/Ba are independent of proton energy. The results are analyzed with the two-step model and compared with the kinematics of the coherent interaction model. The implications of the results and comparisons for the reaction mechanism are considered.
- Research Organization:
- Department of Chemistry, Purdue University, West Lafayette, Indiana 47907
- OSTI ID:
- 6745592
- Journal Information:
- Phys. Rev., C; (United States), Journal Name: Phys. Rev., C; (United States) Vol. 23:1; ISSN PRVCA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
645101* -- High Energy Physics-- Particle Interactions & Properties-Experimental-- Electromagnetic Interactions & Properties
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ALKALINE EARTH ISOTOPES
ANGULAR DISTRIBUTION
BARIUM ISOTOPES
BARYON REACTIONS
CHARGED-PARTICLE REACTIONS
DATA
DISTRIBUTION
ENERGY RANGE
EXPERIMENTAL DATA
FRAGMENTATION
GEV RANGE
HADRON REACTIONS
HADRON-HADRON INTERACTIONS
INCLUSIVE INTERACTIONS
INELASTIC SCATTERING
INFORMATION
INTERACTIONS
ISOTOPE PRODUCTION
ISOTOPES
MEV RANGE
MEV RANGE 100-1000
NUCLEAR REACTIONS
NUCLEON REACTIONS
NUMERICAL DATA
PARTICLE INTERACTIONS
PROTON REACTIONS
SCATTERING
SPALLATION
TARGETS
URANIUM 238 TARGET
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ALKALINE EARTH ISOTOPES
ANGULAR DISTRIBUTION
BARIUM ISOTOPES
BARYON REACTIONS
CHARGED-PARTICLE REACTIONS
DATA
DISTRIBUTION
ENERGY RANGE
EXPERIMENTAL DATA
FRAGMENTATION
GEV RANGE
HADRON REACTIONS
HADRON-HADRON INTERACTIONS
INCLUSIVE INTERACTIONS
INELASTIC SCATTERING
INFORMATION
INTERACTIONS
ISOTOPE PRODUCTION
ISOTOPES
MEV RANGE
MEV RANGE 100-1000
NUCLEAR REACTIONS
NUCLEON REACTIONS
NUMERICAL DATA
PARTICLE INTERACTIONS
PROTON REACTIONS
SCATTERING
SPALLATION
TARGETS
URANIUM 238 TARGET