TY - JOUR
T1 - Mössbauer effect studies of the 58 keV level of 159Tb
AU - Atzmony, U.
AU - Bauminger, E. R.
AU - Ofer, S.
PY - 1966/12
Y1 - 1966/12
N2 - The recoilless absorption spectra of the 58 keV γ-rays from 159mTb in 159Tb situated in Tb2O3, TbAl2, Tb metal and TbFe2 have been measured at temperatures ranging from 20° K to room temperature. The sources used were 159Dy and 159Gd in oxide form. All absorbers gave unsplit absorption lines. From the width measured at room temperature with an oxide source and absorber, a value of T1/2 ≧ (1.05 ± 0.15) × 10-10 sec was deduced for the half-life of the 58 keV level. From the broadened absorption line obtained with the Tb metal absorber, a value of 1.50±0.10 n.m. was obtained for the magnetic moment of the 58 keV level of 159Tb, though a value of 2.10±0.15 n.m. cannot unambiguously be excluded. The line width and shape obtained with a TbFe2 absorber, where the internal field is about 15% higher than in Tb metal, are consistent with the above mentioned magnetic moment of the excited state.
AB - The recoilless absorption spectra of the 58 keV γ-rays from 159mTb in 159Tb situated in Tb2O3, TbAl2, Tb metal and TbFe2 have been measured at temperatures ranging from 20° K to room temperature. The sources used were 159Dy and 159Gd in oxide form. All absorbers gave unsplit absorption lines. From the width measured at room temperature with an oxide source and absorber, a value of T1/2 ≧ (1.05 ± 0.15) × 10-10 sec was deduced for the half-life of the 58 keV level. From the broadened absorption line obtained with the Tb metal absorber, a value of 1.50±0.10 n.m. was obtained for the magnetic moment of the 58 keV level of 159Tb, though a value of 2.10±0.15 n.m. cannot unambiguously be excluded. The line width and shape obtained with a TbFe2 absorber, where the internal field is about 15% higher than in Tb metal, are consistent with the above mentioned magnetic moment of the excited state.
KW - measured Mössbauer absorption. Tb level deduced a, b, μ
KW - NUCLEAR REACTION Tb(γ, γ), E = 58 keV
UR - http://www.scopus.com/inward/record.url?scp=0042233686&partnerID=8YFLogxK
U2 - 10.1016/S0029-5582(66)80104-9
DO - 10.1016/S0029-5582(66)80104-9
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AN - SCOPUS:0042233686
SN - 0029-5582
VL - 89
SP - 433
EP - 442
JO - Nuclear Physics
JF - Nuclear Physics
IS - 2
ER -