Experimental nuclear and radiochemistry. Progress report, February 1, 1980-January 31, 1981
Deep nuclear spallation reactions induced by high-energy light particles on complex nuclei were investigated. Experimental studies involve activation of various medium to heavy mass targets bombarded by pi-mesons, protons and alpha particles. A prime objective is to deconvolve the cascade and evaporation steps in the reaction mechanism. Emphasis has been placed on spallation products far from yield maxima where the deconvolution is most justifiable. Irradiations have been performed predominantly at the Clinton P. Anderson Los Alamos Meson Physics Facility. Results of cross section determinations from bombardments of /sup 89/Y, /sup 92/Mo, /sup 96/Mo and /sup 100/Mo with 800 MeV protons have nearly been completed, providing comparison of isobaric and mass-yield distributions. Data have also been obtained at 500 MeV. Theoretical efforts are being directed at the evaporative behavior of very high-temperature nuclei as determined by the nuclear equation of state and how such behavior might be observed in very deep spallation processes. In addition, the soft spheres model has been combined with spallation systematics to explore the feasibility of high-intensity beams to incinerate high-level nuclear wastes and also to predict interaction lengths in nuclear emulsion studies of relativistic heavy ions. Data are presented on spallation of /sup 130/Te by 800-MeV protons, decay of /sup 87/Zr, and /sup 84/Zr, spallation-transmutation of /sup 90/Sr, and anomalous relativistic projectile fragments in emulsion detectors. (DLC)
- Research Organization:
- Carnegie-Mellon Univ., Pittsburgh, PA (USA). Dept. of Chemistry
- DOE Contract Number:
- AS02-78ER04721
- OSTI ID:
- 6827885
- Report Number(s):
- DOE/ER/04721-4; TRN: 81-006753
- Country of Publication:
- United States
- Language:
- English
Similar Records
Experimental nuclear and radiochemistry. Progress report and review, 1984
Experimental nuclear and radiochemistry. Progress report, 1983
Related Subjects
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ISOBARIC NUCLEI
NUCLEAR REACTION YIELD
MOLYBDENUM 100
PROTON REACTIONS
SPALLATION
MOLYBDENUM 92
MOLYBDENUM 96
NUCLEAR CHEMISTRY
DECAY
RESEARCH PROGRAMS
SPALLATION FRAGMENTS
NUCLEAR EMULSIONS
STRONTIUM 90
TRANSMUTATION
TELLURIUM 130
YTTRIUM 89
ZIRCONIUM 84
ZIRCONIUM 87
ZIRCONIUM ISOTOPES
CROSS SECTIONS
DISTRIBUTION
HALF-LIFE
MEAN FREE PATH
MEV RANGE 100-1000
RELATIVISTIC RANGE
ALKALINE EARTH ISOTOPES
BARYON REACTIONS
BETA DECAY RADIOISOTOPES
BETA-MINUS DECAY RADIOISOTOPES
BETA-PLUS DECAY RADIOISOTOPES
CHARGED-PARTICLE REACTIONS
CHEMISTRY
ENERGY RANGE
EVEN-EVEN NUCLEI
EVEN-ODD NUCLEI
HADRON REACTIONS
HOURS LIVING RADIOISOTOPES
INTERMEDIATE MASS NUCLEI
ISOMERIC TRANSITION ISOTOPES
ISOTOPES
MEV RANGE
MOLYBDENUM ISOTOPES
NUCLEAR FRAGMENTS
NUCLEAR REACTIONS
NUCLEI
NUCLEON REACTIONS
ODD-EVEN NUCLEI
RADIOISOTOPES
SECONDS LIVING RADIOISOTOPES
STABLE ISOTOPES
STRONTIUM ISOTOPES
TELLURIUM ISOTOPES
YEARS LIVING RADIOISOTOPES
YIELDS
YTTRIUM ISOTOPES
400700* - Radiochemistry & Nuclear Chemistry
651720 - Nuclear Properties & Reactions
A=90-149
Experimental