Lattice damage in calcium fluoride induced by 360 keV xenon ion irradiation was measured in situ using Rutherford backscattering and channeling (RBS/C) techniques. Calcium fluoride single crystals of (100) orientation were irradiated at - 115 and 35°C by Xe ion beams along a random direction 15° off the (100) axis. A 2 MeV He ion-beam from a 3 MV tandem accelerator was incident on the CaF2 crystal along the (110) axis to determine the radiation damage. No amorphized layer was observed at both irradiation temperatures up to an irradiation dose of 2 × 1016 Xe/cm2. RBS/C measurements showed that lattice disorder in the irradiated layer saturated at 70% of the random level. Analysis of cross-sectional transmission electron microscopy (XTEM) revealed a damaged but single-crystalline CaF2 layer. This study demonstrates the radiation tolerance of CaF2 under displacive irradiation at low to ambient temperatures.
|ジャーナル||Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms|
|出版ステータス||出版済み - 5 1997|
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