Skip to main content
OSTI.GOVU.S. Department of Energy Office of Scientific and Technical Information
U.S. Department of Energy
Office of Scientific and Technical Information
 

High resolution study of proton resonances in /sup 65/Ga and /sup 67/Ga

Thesis/Dissertation ·
OSTI ID:5976020
Differential cross sections were measured for /sup 64/Zn(p,p) from 2.50 to 3.24 MeV and for /sup 66/Zn(p,p) from 2.60 to 3.26 MeV at laboratory angles of 90/sup 0/, 105/sup 0/, 135/sup 0/, and 160/sup 0/. These experiments were performed with the Triangle Universities Nuclear Laboratory 3 MV Van de Graaff accelerator and associated electrostatic analyzer-homogenizer system. The total overall energy resolution was 420 to 525 eV for /sup 64/Zn(p,p) and 360 to 405 eV for /sup 66/Zn(p,p). Resonances observed in the excitation functions were analyzed with a multilevel R-Matrix formalism. Resonance energies, spins, parities, and elastic widths were extracted for 39 resonances in /sup 65/Ga and 148 resonances in /sup 67/Ga. The l = 0 proton strength functions were calculated for /sup 64/Zn and /sup 66/Zn. The s-wave strength function shows an increase for A=66, which is consistent with earlier results from (p,n) cross section studies. Statistical properties of the 1/2/sup +/ resonances in /sup 65/Ga and /sup 67/Ga were examined. The spacing and reduced width distributions were compared with the Wigner and Porter-Thomas distributions, respectively. This comparison indicates that 50% of the 1/2/sup +/ resonances were missed in /sup 65/Ga and that 70% of the 1/2/sup +/ resonances were missed in /sup 67/Ga. The observed s-wave level densities in /sup 65/Ga and /sup 67/Ga are compared with predictions from conventional level density models. The analogs of the 0.867 MeV, the 0.910 MeV, and the 1.370 MeV states of /sup 65/Zn are observed in /sup 65/Ga; the analogs of the 0.093 MeV and the 0.394 MeV states of /sup 67/Zn are observed in /sup 67/Ga. The analog states in /sup 65/Ga were fragmented into only two or three resonances, while the two analog states in /sup 67/Ga were highly fragmented. Fits to the fine structure distributions of these two analogs were obtained and the resulting parameters compared with the Robson model. Coulomb energies were extracted for these five analogs.
Research Organization:
North Carolina State Univ., Raleigh (USA)
OSTI ID:
5976020
Country of Publication:
United States
Language:
English

Similar Records

Study of parity violation in nuclear states
Technical Report · Sun Jul 01 00:00:00 EDT 1973 · OSTI ID:4936370
ISOBARIC-ANALOGUE STATES IN Cu$sup 6$$sup 5$
Journal Article · Sat Feb 29 23:00:00 EST 1964 · Phys. Letters · OSTI ID:4029654
NUCLEAR EXCITATION FUNCTIONS AND THICK-TARGET YIELDS: Zn+d AND Ar$sup 40$(d,$alpha$)
Journal Article · Sun Mar 31 23:00:00 EST 1963 · 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:4741796

Related Subjects

651623* -- Nuclear Properties & Reactions
A=59-89
Experimental-- Energy Levels & Transitions-- (-1987)
651625 -- Nuclear Properties & Reactions
A=59-89
Experimental-- Nuclear Reactions & Scattering-- (-1987)
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ANGULAR MOMENTUM
BARYON REACTIONS
BETA DECAY RADIOISOTOPES
BETA-PLUS DECAY RADIOISOTOPES
CAPTURE
CHARGED-PARTICLE REACTIONS
DATA
DAYS LIVING RADIOISOTOPES
ELECTRON CAPTURE RADIOISOTOPES
ENERGY LEVELS
ENERGY RANGE
EXPERIMENTAL DATA
FUNCTIONS
GALLIUM 65
GALLIUM 67
GALLIUM ISOTOPES
HADRON REACTIONS
INFORMATION
INTERMEDIATE MASS NUCLEI
ISOBARIC ANALOGS
ISOTOPES
LEVEL WIDTHS
MEV RANGE
MEV RANGE 01-10
MINUTES LIVING RADIOISOTOPES
NUCLEAR REACTIONS
NUCLEI
NUCLEON REACTIONS
NUMERICAL DATA
ODD-EVEN NUCLEI
PARITY
PARTICLE PROPERTIES
PROTON REACTIONS
RADIOISOTOPES
SPIN
STRENGTH FUNCTIONS
TARGETS
ZINC 64 TARGET
ZINC 66 TARGET