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Title: Measurements for spin inversion and noninversion in successive decays via nuclear magnetic resonance on oriented nuclei

Nuclear magnetic resonance on oriented nuclei (NMR-ON) measurements were performed on the successive decays of {sup 89}Zr-{sup 89}Y{sup {ital m}} and {sup 191}Os-{sup 191}Ir{sup {ital m}} in Fe. The NMR-ON spectra of {sup 89}Zr{ital Fe} and {sup 191}Os{ital Fe} were obtained by detecting {gamma} rays from the decay of the isomers, {sup 89}Y{sup m} and {sup 191}Ir{sup m}, respectively. For {sup 89}Zr{ital Fe}, the anisotropy of the {gamma} ray increased at the resonance. On the other hand, for {sup 191}Os{ital Fe} the anisotropy of the {gamma} ray decreased at the resonance. These phenomena were explained using the spin inversion and spin noninversion processes including the lifetimes of the isomers and spin lattice relaxation times. NMR-ON measurements for such spin inversion and noninversion processes were reported. The resonance spectra were also observed by detecting {beta} rays from {sup 89}Zr and {sup 191}Os. In these experiments the magnetic moments of {sup 89}Zr and {sup 191}Os were determined to be {minus}1.08 (2) {mu}{sub N} and 0.962 (28) {mu}{sub N}, respectively. The signs of the magnetic moments of {sup 89}Y{sup m} and {sup 191}Ir{sup m} were also determined to be positive. {copyright} {ital 1996 The American Physical Society.}
Authors:
; ; ;  [1] ;  [2]
  1. Department of Physics, Niigata University, Niigata 950-21 (Japan)
  2. National Laboratory for High Energy Physics, Tsukuba 350 (Japan)
Publication Date:
OSTI Identifier:
383323
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physical Review, C; Journal Volume: 54; Journal Issue: 3; Other Information: PBD: Sep 1996
Country of Publication:
United States
Language:
English
Subject:
66 PHYSICS; 44 INSTRUMENTATION, INCLUDING NUCLEAR AND PARTICLE DETECTORS; NUCLEAR MAGNETIC RESONANCE; ORIENTED NUCLEI; ZIRCONIUM 89; NMR SPECTRA; OSMIUM 191; YTTRIUM 89; NUCLEAR DECAY; IRIDIUM 191; GAMMA RADIATION; ISOMERS; ANISOTROPY; SPIN-LATTICE RELAXATION; RELAXATION TIME; MAGNETIC MOMENTS; LIFETIME; SPIN; IRON