Title :
CsI(Tl) yield monitor for quasi-monochromatic photons from Compton backscattering of laser light at ETL
Author :
Ohgaki, H. ; Sugiyama, S. ; Noguchi, T. ; Yamazaki, T. ; Mikado, T. ; Chiwaki, M. ; Yamada, K. ; Suzuki, R.
Author_Institution :
Electrotech. Lab., Ibaraki, Japan
fDate :
8/1/1993 12:00:00 AM
Abstract :
A CsI(Tl) yield monitor was constructed for the detection of quasi-monochromatic photons (LCS photons) generated by Compton backscattering of laser light. The monitor has dimensions of 150 mm×150 mm×300 mm, consisting of 9-CsI(Tl) crystals. The fundamental performance of the CsI(Tl) monitor was measured with radioisotope (RI) sources and a quasi-monochromatic photon beam. The detection efficiency was measured, and 100% efficiency was achieved for 20-MeV quasi-monochromatic photons. This monitor was also used as a photon spectrometer. The overall energy resolution was 3% for 3.2-MeV, and 7% for 20-MeV quasi-monochromatic photons. Precise measurements of the LCS photon yield were done with the CsI(Tl) monitor. It was confirmed that the photon yield is correctly expressed by the theoretical calculation
Keywords :
radiation detection and measurement; scintillation counters; 20 MeV; Compton backscattering; CsI(Tl) yield monitor; CsI:Tl; LCS photons; detection efficiency; energy resolution; laser light; photon spectrometer; quasi-monochromatic photons; Backscatter; Computerized monitoring; Detectors; Energy measurement; Energy resolution; Laboratories; Laser beams; Performance evaluation; Photonic crystals; Spectroscopy;
Journal_Title :
Nuclear Science, IEEE Transactions on
