Physical study of temperature measurement by neutron resonance absorption of tungsten.

The method of temperature measurement with neutron resonance absorption is a non-contact temperature measurement technique, which makes use of the excellent penetration characteristics of neutrons and the Doppler broadening of the neutron resonance absorption cross section to obtain the static and dynamic temperature parameters as well as the temperature distribution in a closed system. The height and width of resonance absorption peak various with object temperature. By appropriate calibration, the temperature would be obtained with measuring neutron resonance absorption. In this paper, the width of neutron resonance absorption of neutron cross section and neutron transmittance various with tungsten coating/foil temperature are investigated. Result shows that variation in the full width at half maximum (FWHM) of resonance peak with square root temperature and width foil thickness are linear. By measuring the FWHM of resonance peak and the thickness of foil, the temperature could be calculated. Based on the FWHM of resonance peak of neutron transmittance, the data library could be generated for remote temperature measuring technique. [ABSTRACT FROM AUTHOR]