skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: High-spin spectroscopy in the. gamma. -soft mass A = 130 region

Abstract

High spin states in the odd-proton nuclei {sup 133}Pr, {sup 135,137}Pm and {sup 131}La, the odd-neutron nucleus {sup 135}Nd and the doubly-odd nuclei {sup 134}Pr and {sup 136}Pm were studied following heavy-ion fusion-evaporation reactions using beams provided by the Stony Brook Tandem-LINAC accelerators. Gamma-rays produced following these reactions were measured using an array of four BGO suppressed Ge detectors. Experiments performed included excitation functions, angular distribution measurements and gamma-gamma coincidences. In addition in several cases internal conversion electrons were measured using a mini-orange electron spectrometer, which was constructed as part of this dissertation. The experimental crossing frequencies and signature splittings are compared with cranked shell model predictions as a function of nuclear triaxiality. Generally the odd-proton nuclei were found to possess prolate or near prolate collective shapes while odd neutron and double-odd nuclei possess more triaxial shapes. A collective oblate band based on the {pi}h{sub 11/2} {direct product} ({nu}h{sub 11/2}){sup 2} configuration is observed in {sup 131}La. Here the prolate collective core is driven to an oblate, but still collectively rotating shape by the rotational alignment of a pair of upper midshell h{sub 11/2} neutrons.

Authors:
Publication Date:
Research Org.:
State Univ. of New York, Stony Brook, NY (USA)
OSTI Identifier:
5094689
Resource Type:
Miscellaneous
Resource Relation:
Other Information: Thesis (Ph. D.)
Country of Publication:
United States
Language:
English
Subject:
74 ATOMIC AND MOLECULAR PHYSICS; 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; 73 NUCLEAR PHYSICS AND RADIATION PHYSICS; NUCLEON REACTIONS; HIGH SPIN STATES; CALCULATION METHODS; EXPERIMENTAL DATA; LANTHANUM 131; MEASURING INSTRUMENTS; MEASURING METHODS; NEODYMIUM 135; PRASEODYMIUM 133; PRASEODYMIUM 134; PROMETHIUM ISOTOPES; BARYON REACTIONS; BETA DECAY RADIOISOTOPES; BETA-PLUS DECAY RADIOISOTOPES; DATA; ELECTRON CAPTURE RADIOISOTOPES; ENERGY LEVELS; EVEN-ODD NUCLEI; HADRON REACTIONS; HOURS LIVING RADIOISOTOPES; INFORMATION; INTERMEDIATE MASS NUCLEI; ISOTOPES; LANTHANUM ISOTOPES; MINUTES LIVING RADIOISOTOPES; NEODYMIUM ISOTOPES; NUCLEAR REACTIONS; NUCLEI; NUMERICAL DATA; ODD-EVEN NUCLEI; ODD-ODD NUCLEI; PRASEODYMIUM ISOTOPES; RADIOISOTOPES; RARE EARTH ISOTOPES; RARE EARTH NUCLEI; 640302* - Atomic, Molecular & Chemical Physics- Atomic & Molecular Properties & Theory; 645100 - High Energy Physics- Particle Interactions & Properties-Experimental; 651100 - Nuclear Physics- Experimental Techniques- (1980-); 651720 - Nuclear Properties & Reactions, A=90-149, Experimental

Citation Formats

Beausang, C W. High-spin spectroscopy in the. gamma. -soft mass A = 130 region. United States: N. p., 1987. Web.
Beausang, C W. High-spin spectroscopy in the. gamma. -soft mass A = 130 region. United States.
Beausang, C W. 1987. "High-spin spectroscopy in the. gamma. -soft mass A = 130 region". United States.
@article{osti_5094689,
title = {High-spin spectroscopy in the. gamma. -soft mass A = 130 region},
author = {Beausang, C W},
abstractNote = {High spin states in the odd-proton nuclei {sup 133}Pr, {sup 135,137}Pm and {sup 131}La, the odd-neutron nucleus {sup 135}Nd and the doubly-odd nuclei {sup 134}Pr and {sup 136}Pm were studied following heavy-ion fusion-evaporation reactions using beams provided by the Stony Brook Tandem-LINAC accelerators. Gamma-rays produced following these reactions were measured using an array of four BGO suppressed Ge detectors. Experiments performed included excitation functions, angular distribution measurements and gamma-gamma coincidences. In addition in several cases internal conversion electrons were measured using a mini-orange electron spectrometer, which was constructed as part of this dissertation. The experimental crossing frequencies and signature splittings are compared with cranked shell model predictions as a function of nuclear triaxiality. Generally the odd-proton nuclei were found to possess prolate or near prolate collective shapes while odd neutron and double-odd nuclei possess more triaxial shapes. A collective oblate band based on the {pi}h{sub 11/2} {direct product} ({nu}h{sub 11/2}){sup 2} configuration is observed in {sup 131}La. Here the prolate collective core is driven to an oblate, but still collectively rotating shape by the rotational alignment of a pair of upper midshell h{sub 11/2} neutrons.},
doi = {},
url = {https://www.osti.gov/biblio/5094689}, journal = {},
number = ,
volume = ,
place = {United States},
year = {Thu Jan 01 00:00:00 EST 1987},
month = {Thu Jan 01 00:00:00 EST 1987}
}

Miscellaneous:
Other availability
Please see Document Availability for additional information on obtaining the full-text document. Library patrons may search WorldCat to identify libraries that may hold this item.

Save / Share: