Thermal neutron imaging tests with rare-earthion-doped LiCaAlF6 and sealed 252Cf source

Thermal neutron imaging with Eu doped
⁶
LiCaAlF
₆
, which is a novel thermal neutron scintillator, was demonstrated. Eu doped
⁶
LiCaAlF
₆
single crystal was grown by Czochralski technique and grown crystal was cut and polished to a plate shape. Setup of the thermal neutron imaging consisted of the plate shaped Eu doped
⁶
LiCaAlF
₆
, a position sensitive photomultiplier tube, Cd-mask and
²⁵²
Cf in the polyethylene container. As a result, clear neutron image was successfully observed.