SYMPOSIA PAPER Published: 01 January 1990

Radiation Damage in Single Crystal CsI(Tl) and Polycrystal CsI


Radiation damage in single crystal CsI(Tl) and polycrystal CsI was assessed by measuring the changes in radioluminescent intensity caused by successive neutron and gamma ray pulses from a TRIGA nuclear reactor. The radioluminescent intensity from the single crystal decreases within nine pulses by 30% in the near infrared range (0.7–4.5 μm) and by 25% in the visible range (0.2–1 μm) before staying constant. For the polycrystal CsI, the emission in the visible range decreases by 60% within 6 pulses and then remains constant, whereas no measurable emission is observed in the infrared. Finally, a heating and cooling cycle is shown to repair the damage for both crystals.

Author Information

Barnouin, O
Procoli, A
Chung, H
Miley, GH
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Developed by Committee: E13
Pages: 568–575
DOI: 10.1520/STP26522S
ISBN-EB: 978-0-8031-5157-4
ISBN-13: 978-0-8031-4478-1