Lianfan Liu, Weinan Zhou, Liwdong Xae, et al. Time dependence and Mössbauer spectra of resonantly filtered radiation of 57Fe[J]. Nuclear techniques, 1984, 07(6): 38-40,66.
Lianfan Liu, Weinan Zhou, Liwdong Xae, et al. Time dependence and Mössbauer spectra of resonantly filtered radiation of 57Fe[J]. Nuclear techniques, 1984, 07(6): 38-40,66.DOI:
Using delayed-coincidence measurement between 123 keV and 14.4 keV gamma rays from
57
Fe
we have studied the time dependence of gamma rays. The 123 keV gamma ray signals the formation of the 14.4 keV Mössbauer level. When no filter is used
the number of gamma rays decrease exponentially with the known half-life of 0.1 ns; when a foil containing
57
Fe (which is resonant to 14.4 keV radiation) is used as a filter
the number of gamma rays do not decrease exponentially. The detail of the measured decay curve depends on the thickness of the absorber and the energy shifts between the source and filter. We measured the time spectra with energy shifts of
ω
=0 and
Δω
=2.5
Γ
. The theoretical curve are also calculated to fit the experimental data. For comparison
the regular Mössbauer spectra and the coincidence-Mössbauer spectra are measured.
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references
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