The material has a very high luminescence efficiency, and exhibits no significant self absorption of the scintillation light and has good resolution ability to X-ray and γ-ray.
Press-forged NaI(Tl) crystal is derived from a unique manufacturing process in which single crystal ingots are recrystallized under heat and pressure. The characteristic improves mechanical strength but has no effect on the scintillation performance.
So it is widely recognized as suitable alternatives to single crystal scintillators in those applications where thermal and mechanical shock are encountered. Another feature of pressforged NaI(Tl) is the possibility to manufacture complicated detector geometries directly without extensive machining.
|Relative light output(%)|| |
|Mohs hardness||2.1||Thermal expansion coefficient||47.4 x 10-6 K-1|
|Cleavage plane||(100)||Light yield||38x103Photons/MeVγ|
|Wavelength of emission maximum(nm)|| |
|Primary decay constant(ns)||