Experimental and theoretical characterization of effective interactions near sup 132 Sn

Thesis/Dissertation · Thu Jan 01 04:00:00 EST 1987

OSTI ID:5148588

Stone, C A

Experimental investigations have been undertaken to study the multiplet structure in six nuclei near {sup 132}Sn: {sup 132,130}Sb, {sup 131,129,127}Sb, and {sup 132}Te. Experiments were performed using ion beams of mass-separated fission products produced by the TRISTAN mass separator at Brookhaven National Laboratory. Extensive four-detector gamma-gamma coincidences, gamma-multiscaling and conversion-electron data have been collected. The previously unobserved 5{sup +} member of the {pi}g{sub 7/2}{circle times} vd{sub 3/2} multiplet has now been observed in {sup 132,130}Sb. These studies have also found that the {sup 130}Sb ground state is the 8{sup {minus}} isomer with the 4{sup +} metastable isomer at an energy of 5.1 keV. Studies on {sup 131,129,127}Sb have located members of multiplets and complete the systematics from {sup 123-131}Sb. A 17.1 min. {beta}{sup {minus}} decaying isomer was observed in {sup 129}Sb and defines a 19/2{sup {minus}} level at 1851.29 keV. Isomerism has also been studied in {sup 132,130,130,129}Sb and in {sup 132}Te. Ultralarge shell model calculations were performed using the VLADIMIR shell model code on the Cray/CDC 7600 supercomputer system at Lawrence Livermore National Laboratory. Results show that realistic potentials work well on nuclei near {sup 132}Sn but show problems with {sup 129,130}Sn and {sup 131}Sb which can not be accounted for by core-polarization corrections.

• Research Organization: Maryland Univ., College Park, MD (USA)
• OSTI ID: 5148588
• Country of Publication: United States
• Language: English

Related Subjects

651720* -- Nuclear Properties & Reactions
A=90-149
Experimental
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ANTIMONY 127
ANTIMONY 129
ANTIMONY 130
ANTIMONY 131
ANTIMONY 132
ANTIMONY ISOTOPES
BETA DECAY
BETA DECAY RADIOISOTOPES
BETA-MINUS DECAY
BETA-MINUS DECAY RADIOISOTOPES
BNL
COINCIDENCE METHODS
COUNTING TECHNIQUES
DATA
DAYS LIVING RADIOISOTOPES
DECAY
ENERGY-LEVEL TRANSITIONS
EVEN-EVEN NUCLEI
EXPERIMENTAL DATA
GAMMA SPECTRA
HOURS LIVING RADIOISOTOPES
INFORMATION
INTERMEDIATE MASS NUCLEI
INTERNAL CONVERSION RADIOISOTOPES
ISOMERIC NUCLEI
ISOMERIC TRANSITION ISOTOPES
ISOTOPES
MATHEMATICAL MODELS
MINUTES LIVING RADIOISOTOPES
NATIONAL ORGANIZATIONS
NUCLEAR DECAY
NUCLEAR MODELS
NUCLEAR POTENTIAL
NUCLEI
NUMERICAL DATA
ODD-EVEN NUCLEI
ODD-ODD NUCLEI
POLARIZATION
POTENTIALS
RADIOISOTOPES
SHELL MODELS
SPECTRA
TELLURIUM 132
TELLURIUM ISOTOPES
US AEC
US DOE
US ERDA
US ORGANIZATIONS