Bulg. J. Phys. vol.31 no.5-6 (2004), pp. 197-203

Thermosensitive Quartz Crystal Resonators under Fast Neutrons and Gamma Rays

R. Velcheva1, L. Spassov1, Yu. Filippov2, E. Kulagin2, V. Miklayev2
1Institute of Solid State Pnysics, Bulgarian Academy of Sciences, 72, Tzarigradsko chaussee Blvd., BG-1784 Sofia, Bulgaria
2Joint Institute of Nuclear Research, 141980 Dubna, Moscow region, Russia
Abstract. Thermosensitive quartz crystal resonators (TSQRs) were irradiated by gamma rays of a Cobalt-60 source and by fast neutrons from a pulsed neutron reactor. Resonators made out of flat parallel quartz plates, yxbl/1054′/1106′ crystalline cut, operate at 26.5 MHz on 3rd overtone and thickness share Cmode. The frequency was measured as a radiation dose function for different temperatures. The offset of temperature frequency characteristic of TSQR under fast neutron irradiation of up to 2×1014 n/cm2 and gamma rays up to 5 MRad was investigated. As a result the frequency shift was negligible after irradiation with fast neutrons up to 1014 n/cm2. There was found a negative frequency shift of -8×10−6 produced by gamma radiation.

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