Experimental nuclear and radiochemistry. Progress report, February 1, 1979-January 31, 1980. [Dept. of Chemistry, Carnegie-Mellon Univ. , Pittsburgh, Pennsylvania, 2/1/79 to 1/31/80]
This project entails the investigation of deep nuclear spallation reactions induced by high-energy light particles on complex nuclei. 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. Experimentally, then, particular emphasis has been placed on spallation products far from yield maxima. Irradiations have been performed predominantly at the Clinton P. Anderson Los Alamos Meson Physics Facility. Results from bombardments of /sup 89/Y with 190-MeV ..pi../sup -/, 800-MeV protons and 720-MeV alphas (SREL) have been nearly completed; mass-yield distributions were compared. Pion-induced neutron removal reactions have been presented for /sup 90/Zr and /sup 96/Ru along with a serious critique of the final-state charge interaction hypothesis. 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 become evident in spallation processes. In addition, the soft spheres model has been extended to consider the significance of nuclear transparency in high-energy reactions.
- Research Organization:
- Carnegie-Mellon Univ., Pittsburgh, PA (USA). Dept. of Chemistry
- DOE Contract Number:
- ER-78-S-02-4721
- OSTI ID:
- 5218219
- Report Number(s):
- COO-4721-2
- Country of Publication:
- United States
- Language:
- English
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Nuclear research with heavy ions. Annual progress report, January 1, 1979-December 31, 1979. [Dept. of Chemistry, Carnegie-Mellon Univ. , Pittsburgh]
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73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ALKALINE EARTH ISOTOPES
ALPHA REACTIONS
BARYON REACTIONS
BARYONS
BETA DECAY RADIOISOTOPES
BETA-MINUS DECAY RADIOISOTOPES
BETA-PLUS DECAY RADIOISOTOPES
CARBON 11
CARBON 12 TARGET
CARBON ISOTOPES
CHARGED-PARTICLE REACTIONS
CHEMISTRY
CROSS SECTIONS
DATA
DAYS LIVING RADIOISOTOPES
DIRECT REACTIONS
ELECTRON CAPTURE RADIOISOTOPES
ELEMENTARY PARTICLES
ENERGY RANGE
EVAPORATION MODEL
EVEN-EVEN NUCLEI
EVEN-ODD NUCLEI
EXCITATION FUNCTIONS
EXPERIMENTAL DATA
FERMIONS
FINAL-STATE INTERACTIONS
GOLD 196
GOLD 197 TARGET
GOLD ISOTOPES
HADRON REACTIONS
HADRONS
HEAVY NUCLEI
HOURS LIVING RADIOISOTOPES
INFORMATION
INTERACTIONS
INTERMEDIATE MASS NUCLEI
ISOMERIC TRANSITION ISOTOPES
ISOTOPES
KINETICS
KNOCK-OUT REACTIONS
LIGHT NUCLEI
MAGNESIUM 24
MAGNESIUM 25 TARGET
MAGNESIUM ISOTOPES
MATHEMATICAL MODELS
MESON REACTIONS
MEV RANGE
MEV RANGE 100-1000
MINUTES LIVING RADIOISOTOPES
NEUTRONS
NUCLEAR CHEMISTRY
NUCLEAR MODELS
NUCLEAR REACTION KINETICS
NUCLEAR REACTIONS
NUCLEI
NUCLEON REACTIONS
NUCLEONS
NUMERICAL DATA
ODD-ODD NUCLEI
PION MINUS REACTIONS
PION PLUS REACTIONS
PION REACTIONS
PROTON REACTIONS
QUASI-FREE REACTIONS
RADIOCHEMISTRY
RADIOISOTOPES
REACTION KINETICS
RESEARCH PROGRAMS
RUTHENIUM 95
RUTHENIUM 96 TARGET
RUTHENIUM ISOTOPES
SPALLATION
STABLE ISOTOPES
TARGETS
THEORETICAL DATA
YTTRIUM 89 TARGET
ZIRCONIUM 89
ZIRCONIUM 90 TARGET
ZIRCONIUM ISOTOPES