Proton resonance spectroscopy: Progress report, June 15, 1987-January 31, 1988
Resonances in nuclei have provided the major testing ground for random-matrix theory. With the recent demonstration that certain quantum chaotic systems also appear to be described by random-matrix theory, the possibility that the nucleus is itself a quantum chaotic system has been suggested. Although showing no direct relation to quantum chaos, some of the work described herein has examined more closely the role of a random-matrix description of nuclei. We have shown that the body of resonance amplitude data shows overall agreement with the key prediction of random-matrix theory that the amplitudes should obey a Gaussian distribution. We also have new data which for the first time show correlations between entrance channels. The role of energy level fluctuations in /sup 26/Al is being examined to see if random-matrix theory can provide a good description at energies near the ground state. We also hope to learn something about the role of isospin symmetry in this nucleus by analyzing fluctuations of the T = 0 and T = 1 levels separately. The role of spectroscopy of individual levels in studying symmetries has also been investigated. An attempt to populate the lowest isospin 2 state in /sup 40/Ca via the isospin-forbidden p + /sup 39/K reaction has been made. Finally, detailed calculations on the role of nuclear spectroscopy in experiments to measure parity mixing in slow neutron resonances have been performed; these calculations reveal the necessity of a thorough understanding of the spectroscopy of the states involved in order to extract the parity-nonconserving matrix element. 29 refs.
- Research Organization:
- Tennessee Technological Univ., Cookeville (USA). Dept. of Physics
- DOE Contract Number:
- FG05-87ER40353
- OSTI ID:
- 5050180
- Report Number(s):
- DOE/ER/40353-1; ON: DE88007439
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
CALCIUM 40
NUCLEAR MATRIX
POTASSIUM 39 TARGET
PROTON REACTIONS
ALUMINIUM 26
ENERGY LEVELS
EXCITED STATES
ISOSPIN
MATRIX ELEMENTS
MIXED STATE
PARITY
PROGRESS REPORT
RESEARCH PROGRAMS
RESONANCE
SPECTROSCOPY
SYMMETRY
SYMMETRY BREAKING
ALKALINE EARTH ISOTOPES
ALUMINIUM ISOTOPES
BARYON REACTIONS
BETA DECAY RADIOISOTOPES
BETA-PLUS DECAY RADIOISOTOPES
CALCIUM ISOTOPES
CHARGED-PARTICLE REACTIONS
DOCUMENT TYPES
EVEN-EVEN NUCLEI
HADRON REACTIONS
ISOTOPES
LIGHT NUCLEI
MATRICES
NUCLEAR REACTIONS
NUCLEI
NUCLEON REACTIONS
ODD-ODD NUCLEI
PARTICLE PROPERTIES
RADIOISOTOPES
SECONDS LIVING RADIOISOTOPES
STABLE ISOTOPES
TARGETS
YEARS LIVING RADIOISOTOPES
653003* - Nuclear Theory- Nuclear Reactions & Scattering