Damage scintillation detectors

Lil(Eu). Lil(Eu) is an efficient thermal-neutron detector through the reaction jLKn, a)jH. The alpha particle and the triton, both charged particles, produce the scintillations. Lil has a density of 4.06 X 10 kg/m, decay time of about 1.1 /i,s, and emission spectrum peaking at 470 nm. Its conversion efficiency is about one-third of that for Nal. It is very hygroscopic and is subject to radiation damage as a result of exposure to neutrons. 

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