Abstract
Single crystal scintillator materials are widely used for detection of high-energy photons and particles.
There is continuous demand for new scintillator materials with higher performance because of increasing
number of medical, industrial, security and other applications. This article presents the recent
development of three novel inorganic scintillators; Pr-doped Lu3Al5O12 (Pr:LuAG), Ce doped Gd3 (Al,
Ga)5 O12 (Ce:GAGG) and Ce or Eu-doped 6LiCaAlF6 (Ce:LiCAF, Eu:LiCAF). Pr:LuAG shows very
interesting scintillation properties including very fast decay time, high light yield and excellent energy
resolution. Taking the advantage of these properties, positron emission mammography (PEM) equipped
with Pr:LuAG were developed. Ce:GAGG shows very high light yield, which is much higher than that
of Ce:LYSO. Survey meter using Ce:GAGG is developed using this scintillator. Ce:LiCAF and
Eu:LiCAF were developed for neutron detection. The advantage and disadvantage are discussed
comparing with halide scintillators. Eu-doped LiCAF indicated five times higher light yield than that of
existing Li-glass. It is expected to be used as the alternative of 3He.
