In situ study of ion-beam induced lattice damage in calcium fluoride crystals

Ning Yu, Michael Nastasi, Kurt E. Sickafus, Kazuhiro Yasuda, Joseph R. Tesmer

Research output: Contribution to journalArticle

11 Citations (Scopus)

Abstract

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.

Original languageEnglish
Pages (from-to)591-595
Number of pages5
JournalNuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms
Volume127-128
DOIs
Publication statusPublished - May 1997

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Calcium fluoride
calcium fluorides
Crystal lattices
Ion beams
ion beams
Rutherford backscattering spectroscopy
Irradiation
damage
Crystals
irradiation
backscattering
crystals
Radiation damage
Xenon
radiation tolerance
Ion bombardment
ion irradiation
radiation damage
Crystal orientation
xenon

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics
  • Instrumentation

Cite this

In situ study of ion-beam induced lattice damage in calcium fluoride crystals. / Yu, Ning; Nastasi, Michael; Sickafus, Kurt E.; Yasuda, Kazuhiro; Tesmer, Joseph R.

In: Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms, Vol. 127-128, 05.1997, p. 591-595.

Research output: Contribution to journalArticle

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N2 - 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.

AB - 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.

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