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Title: INVESTIGATION OF HIGH-SPIN STATES IN Er$sup 16$$sup 6$

Abstract

The decay of the long-lived isomer of Ho/sup 166/ has been studied using gamma-ray scintillation spectrometers and silicon-diode detectors. The results of gamma-gamma coincidence experiments, together with least-squares analysis of the gamma-ray singles spectra, establish the presence of twenty-seven gamma-ray transitions in the decay of this isomer. The conversion-electron spectra provide relative intensities for several of the weak transitions and provided an upper limit for the endpoint energy of the main beta transition from Ho/sup l66/. The data are consistent with the existence of levels whose energies (in kev) and assignments are 80(2+), 265 (4+), 545(6+), 787 (2+), the energy of the most intense beta transition from the long-lived Ho/sup 166/ state must lie between approximately 55 and approximately 65 kev. Several possible nucleon configurntions for the negativeparity states in Er/sup 166/ observed in the decay of this activity are presented and discussed. A description of the observed positive-parity states in terms of an asymmetric-rotator model is given. The agreement between the energies and relative transition probabilities calculated using this model and those observed experimentally is excellent. Formulas for reduced transition probabilities for gammaray transitions between states having spins of 6, 7, and 8 are presented. (auth)

Authors:
;
Publication Date:
Research Org.:
Phillips Petroleum Co., Idaho Falls, Idaho
OSTI Identifier:
4751322
NSA Number:
NSA-17-013576
Resource Type:
Journal Article
Journal Name:
Physical Review (U.S.) Superseded in part by Phys. Rev. A, Phys. Rev. B: Solid State, Phys. Rev. C, and Phys. Rev. D
Additional Journal Information:
Journal Volume: Vol: 129; Other Information: Orig. Receipt Date: 31-DEC-63
Country of Publication:
Country unknown/Code not available
Language:
English
Subject:
PHYSICS; BETA DECAY; COINCIDENCE METHODS; CONFIGURATION; COUNTERS; DECAY; ENERGY LEVELS; ERBIUM 166; GAMMA RADIATION; GAMMA SPECTROMETERS; HOLMIUM 166; INTERACTIONS; INTERNAL CONVERSION; ISOMERS; NUCLEONS; PARITY; PROBABILITY; SCINTILLATION COUNTERS; SEMICONDUCTORS; SILICON; SPECTRA; SPIN; STATISTICS

Citation Formats

Cline, J E, and Reich, C W. INVESTIGATION OF HIGH-SPIN STATES IN Er$sup 16$$sup 6$. Country unknown/Code not available: N. p., 1963. Web. doi:10.1103/PhysRev.129.2152.
Cline, J E, & Reich, C W. INVESTIGATION OF HIGH-SPIN STATES IN Er$sup 16$$sup 6$. Country unknown/Code not available. https://doi.org/10.1103/PhysRev.129.2152
Cline, J E, and Reich, C W. 1963. "INVESTIGATION OF HIGH-SPIN STATES IN Er$sup 16$$sup 6$". Country unknown/Code not available. https://doi.org/10.1103/PhysRev.129.2152.
@article{osti_4751322,
title = {INVESTIGATION OF HIGH-SPIN STATES IN Er$sup 16$$sup 6$},
author = {Cline, J E and Reich, C W},
abstractNote = {The decay of the long-lived isomer of Ho/sup 166/ has been studied using gamma-ray scintillation spectrometers and silicon-diode detectors. The results of gamma-gamma coincidence experiments, together with least-squares analysis of the gamma-ray singles spectra, establish the presence of twenty-seven gamma-ray transitions in the decay of this isomer. The conversion-electron spectra provide relative intensities for several of the weak transitions and provided an upper limit for the endpoint energy of the main beta transition from Ho/sup l66/. The data are consistent with the existence of levels whose energies (in kev) and assignments are 80(2+), 265 (4+), 545(6+), 787 (2+), the energy of the most intense beta transition from the long-lived Ho/sup 166/ state must lie between approximately 55 and approximately 65 kev. Several possible nucleon configurntions for the negativeparity states in Er/sup 166/ observed in the decay of this activity are presented and discussed. A description of the observed positive-parity states in terms of an asymmetric-rotator model is given. The agreement between the energies and relative transition probabilities calculated using this model and those observed experimentally is excellent. Formulas for reduced transition probabilities for gammaray transitions between states having spins of 6, 7, and 8 are presented. (auth)},
doi = {10.1103/PhysRev.129.2152},
url = {https://www.osti.gov/biblio/4751322}, journal = {Physical Review (U.S.) Superseded in part by Phys. Rev. A, Phys. Rev. B: Solid State, Phys. Rev. C, and Phys. Rev. D},
number = ,
volume = Vol: 129,
place = {Country unknown/Code not available},
year = {Fri Mar 01 00:00:00 EST 1963},
month = {Fri Mar 01 00:00:00 EST 1963}
}