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Angular distributions of Sc fragments from the interaction of /sup 238/U with 0. 8 -- 400 GeV protons

Journal Article · · Phys. Rev., C; (United States)
;
Angular distributions of /sup 44/Sc/sup m/, /sup 46/Sc, /sup 47/Sc, and /sup 48/Sc emitted in the interaction of /sup 238/U with 0.8, 3.0, 11.5, and 400 GeV protons have been measured. The angular distributions peak at forward angles at 0.8 and 3 GeV but are sideward-peaked at 11.5 and 400 GeV. At 400 GeV, fewer fragments are emitted at forward than at backward angles. Isotopic differences were found to be small. The data were fitted with the function F/sub L/(theta/sub L/)=1+A/sub 1/costheta/sub L/+A/sub 2/cos/sup 2/theta/sub L/ and were also analyzed in terms of the two-step model. The values of A/sub 1/ peak at 3 GeV, go through zero at 11.5 GeV, and become negative at 400 GeV. The values of A/sub 2/ are zero at 0.8 GeV and become increasingly negative with increasing proton energy. A qualitative explanation in terms of a possible change in the nature of proton-nucleus interactions at high energies is presented.
Research Organization:
Department of Chemistry, Purdue University, West Lafayette, Indiana 47907
OSTI ID:
5459426
Journal Information:
Phys. Rev., C; (United States), Journal Name: Phys. Rev., C; (United States) Vol. 21:6; ISSN PRVCA
Country of Publication:
United States
Language:
English

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Related Subjects

645103* -- High Energy Physics-- Particle Interactions & Properties-Experimental-- Strong Interactions & Baryon & Meson Properties
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ACCELERATORS
ANGULAR DISTRIBUTION
BARYON REACTIONS
BETA DECAY RADIOISOTOPES
BETA-MINUS DECAY RADIOISOTOPES
BETA-PLUS DECAY RADIOISOTOPES
CHARGED-PARTICLE REACTIONS
CYCLIC ACCELERATORS
DAYS LIVING RADIOISOTOPES
DISTRIBUTION
ENERGY RANGE
FRAGMENTATION
GEV RANGE
HADRON REACTIONS
HOURS LIVING RADIOISOTOPES
INTERMEDIATE MASS NUCLEI
INTERNAL CONVERSION RADIOISOTOPES
ISOMERIC TRANSITION ISOTOPES
ISOTOPES
MEV RANGE
MEV RANGE 100-1000
NUCLEAR REACTIONS
NUCLEI
NUCLEON REACTIONS
ODD-EVEN NUCLEI
ODD-ODD NUCLEI
PROTON REACTIONS
RADIOISOTOPES
SCANDIUM 44
SCANDIUM 46
SCANDIUM 47
SCANDIUM 48
SCANDIUM ISOTOPES
SECONDS LIVING RADIOISOTOPES
SYNCHROTRONS
TARGETS
URANIUM 238 TARGET
ZGS