Radiation damage in γ-Mo4O11 |
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| Authors: | Ni Xinbo T Butz A Lerf |
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| Institution: | 1. Physik-Department, Technische Universit?t München, D-8046, Garching, FRG
3. Walther-Meissner-Institut für Tieftemperaturforschung der Bayerischen Akademie der Wissenschaften, D-8046, Garching, FRG
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| Abstract: | We investigated the radiation damage induced by thermal neutron capture of98Mo in γ-Mo4O11 by measuring the99Mo(β−)99Tc nuclear quadrupole interaction by time differential perturbed angular correlations. At room temperature, a fraction of
about 20% of all activated Mo-atoms exhibits a large quadrupole interaction of ω1=550 Mrad/s and an asymmetry parameters of η≊0.75, practically independent of the dose in the range from 7.9·1016 to 7.8·1018 n/cm2. We attribute this signal to Mo-atoms with a near-neighbour oxygen vacancy which was created in a knock-on process following
prompt de-excitation by gamma emission after the thermal neutron capture. |
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