Effect of Fast-Neutron Irradiation on the Pressure and Temperature Dependence of the Elastic Moduli of SiO2 Glass

R. E. Strakna, A. E. Clark, David Bradley, W. M. Slie

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

The low-temperature ultransonic attenuation, the elastic moduli, and the temperature and pressure dependence of the moduli of SiO2 glass are modified by heavy fast-neutron irradiation. A sample of Amersil optical-grade fused silica was irradiated to an integrated flux density in excess of 5×1019 neutronscm2. In this sample the ultrasonic loss is decreased by about 85, the shear modulus increased less than 2, and the compressibility decreased by about 20. The anomalous temperature dependence of the compressibility changed from -3.3×10-2 per°K before irradiation to -9.5×10-3 per°K after irradiation over a temperature range of from 100°K to 300°K. The anomalous pressure dependence of the compressibility changed from 7.35×10-2 per atm before irradiation to 2.86×10-2 per atm after irradiation over a pressure range from atmospheric pressure to 5×104 psi. Similar effects were found in the pressure and temperature dependence of the shear modulus. The effect of irradiation on the low-temperature ultrasonic loss and on the temperature dependence of the sound velocity in this glass was also studied. No change in the ultrasonic attenuation was detected at an irradiation level several orders of magnitude larger than that required to eliminate effectively the comparable 50°K loss peak in synthetic quartz.

Original languageEnglish (US)
Pages (from-to)1439-1443
Number of pages5
JournalJournal of Applied Physics
Volume34
Issue number5
DOIs
StatePublished - Dec 1 1963

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neutron irradiation
fast neutrons
pressure dependence
modulus of elasticity
temperature dependence
irradiation
glass
compressibility
ultrasonics
attenuation
shear
acoustic velocity
grade
atmospheric pressure
quartz
flux density
silicon dioxide

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

Cite this

Strakna, R. E. ; Clark, A. E. ; Bradley, David ; Slie, W. M. / Effect of Fast-Neutron Irradiation on the Pressure and Temperature Dependence of the Elastic Moduli of SiO2 Glass. In: Journal of Applied Physics. 1963 ; Vol. 34, No. 5. pp. 1439-1443.
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Effect of Fast-Neutron Irradiation on the Pressure and Temperature Dependence of the Elastic Moduli of SiO2 Glass. / Strakna, R. E.; Clark, A. E.; Bradley, David; Slie, W. M.

In: Journal of Applied Physics, Vol. 34, No. 5, 01.12.1963, p. 1439-1443.

Research output: Contribution to journalArticle

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AB - The low-temperature ultransonic attenuation, the elastic moduli, and the temperature and pressure dependence of the moduli of SiO2 glass are modified by heavy fast-neutron irradiation. A sample of Amersil optical-grade fused silica was irradiated to an integrated flux density in excess of 5×1019 neutronscm2. In this sample the ultrasonic loss is decreased by about 85, the shear modulus increased less than 2, and the compressibility decreased by about 20. The anomalous temperature dependence of the compressibility changed from -3.3×10-2 per°K before irradiation to -9.5×10-3 per°K after irradiation over a temperature range of from 100°K to 300°K. The anomalous pressure dependence of the compressibility changed from 7.35×10-2 per atm before irradiation to 2.86×10-2 per atm after irradiation over a pressure range from atmospheric pressure to 5×104 psi. Similar effects were found in the pressure and temperature dependence of the shear modulus. The effect of irradiation on the low-temperature ultrasonic loss and on the temperature dependence of the sound velocity in this glass was also studied. No change in the ultrasonic attenuation was detected at an irradiation level several orders of magnitude larger than that required to eliminate effectively the comparable 50°K loss peak in synthetic quartz.

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