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

Abstract

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

Citation Formats

Ohya, S., Ohtsubo, T., Komatsuzaki, K., Cho, D.J., and Muto, S. Measurements for spin inversion and noninversion in successive decays via nuclear magnetic resonance on oriented nuclei. United States: N. p., 1996. Web. doi:10.1103/PhysRevC.54.1129.
Ohya, S., Ohtsubo, T., Komatsuzaki, K., Cho, D.J., & Muto, S. Measurements for spin inversion and noninversion in successive decays via nuclear magnetic resonance on oriented nuclei. United States. doi:10.1103/PhysRevC.54.1129.
Ohya, S., Ohtsubo, T., Komatsuzaki, K., Cho, D.J., and Muto, S. 1996. "Measurements for spin inversion and noninversion in successive decays via nuclear magnetic resonance on oriented nuclei". United States. doi:10.1103/PhysRevC.54.1129.
@article{osti_383323,
title = {Measurements for spin inversion and noninversion in successive decays via nuclear magnetic resonance on oriented nuclei},
author = {Ohya, S. and Ohtsubo, T. and Komatsuzaki, K. and Cho, D.J. and Muto, S.},
abstractNote = {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.}},
doi = {10.1103/PhysRevC.54.1129},
journal = {Physical Review, C},
number = 3,
volume = 54,
place = {United States},
year = 1996,
month = 9
}
  • We report measurements of nuclear magnetic resonance on oriented nuclei (NMR-ON) on {sup 99{ital m}}Rh ({ital I}{sup {pi}}=9/2{sup +},{ital T}{sub 1/2}=4.7 h), and {sup 101{ital m}}Rh ({ital I}{sup {pi}}=9/2{sup +},{ital T}{sub 1/2}=4.3 d) in Fe and Ni. The new measurements do not support the existence of a Knight shift of {similar_to}{minus}5% for Rh{ital Fe} as postulated in the literature. The shift of the NMR-ON resonances with an external magnetic field is discussed critically, especially those effects which may simulate a Knight shift.
  • Nuclear magnetic resonance (NMR/ON) measurements with beta- and gamma-ray detection have been performed on oriented {sup 104}Ag{sup g,m} nuclei with the NICOLE {sup 3}He-{sup 4}He dilution refrigerator setup at ISOLDE/CERN. For {sup 104}Ag{sup g} (I{sup p}i=5{sup +}) the gamma-NMR/ON resonance signal was found at nu=266.70(5) MHz. Combining this result with the known magnetic moment for this isotope, the magnetic hyperfine field of Ag impurities in an Fe host at low temperature (<1 K) is found to be |B{sub hf}(AgFe)|=44.709(35) T. A detailed analysis of other relevant data available in the literature yields three more values for this hyperfine field. Averagingmore » all four values yields a new and precise value for the hyperfine field of Ag in Fe; that is, |B{sub hf}(AgFe)|=44.692(30) T. For {sup 104}Ag{sup m} (I{sup p}i=2{sup +}), the anisotropy of the beta particles provided the NMR/ON resonance signal at nu=627.7(4) MHz. Using the new value for the hyperfine field of Ag in Fe, this frequency corresponds to the magnetic moment mu({sup 104m}Ag)=+3.691(3) mu{sub N}, which is significantly more precise than previous results. The magnetic moments of the even-A {sup 102-110}Ag isotopes are discussed in view of the competition between the (pig{sub 9/2}){sub 7/2}{sup +-3}(nud{sub 5/2}nug{sub 7/2}){sub 5/2}{sup +} and the (pig{sub 9/2}){sub 9/2}{sup +-3}(nud{sub 5/2}nug{sub 7/2}){sub 5/2}{sup +} configurations. The magnetic moments of the ground and isomeric states of {sup 104}Ag can be explained by an almost complete mixing of these two configurations.« less
  • A series of low temperature nuclear orientation (LTNO) experiments has been initiated to measure accurately ground-state magnetic dipole moments of a sequence of odd-proton antimony isotopes up to the neutron shell closure at {ital N}=82 using the sensitive technique of nuclear magnetic resonance on oriented nuclei (NMR/ON). The main aim of this investigation is to clarify the single-particle+collective core coupling mechanism in the heavy antimony isotopes and its influence on the value of magnetic dipole moment. This paper reports results of precision measurement of the magnetic dipole moments of {sup 127}Sb and {sup 129}Sb. {copyright} {ital 1996 The American Physicalmore » Society.}« less
  • We summarize the application of nuclear magnetic resonance of oriented nuclei to rare-earth impurities implanted in ferromagnetic crystals of heavy rare-earth hosts. The experimental aspects are treated in some detail; we present results obtained on /sup 160/TbTb, and give a formal description of the experiments. A discussion of extension to other, similar systems with applications in nuclear, solid-state, and low-temperature physics is given.