Abstract of Publication No. 562
Scintillation and luminescence characteristics
of Rb2LiYBr6 doped with 0.1%, 0.5%,
1%, and 5% Ce3+ are presented. Under
optical and x-ray excitation, Ce3+ doublet
emission is observed at 385 and 420 nm. Rb2LiYBr6:0.5%
Ce3+ shows very high thermal neutron
scintillation light output of 83000 photons/neutron.
An excellent neutron peak resolution of 3.6% (full width
at half maximum over peak position) is observed for
the 4.8 MeV neutron-reaction products energy
response in Rb2LiYBr6:0.1% Ce3+.
This peak shows up at 3.6 MeV g-equivalent
energy and therefore it gives an
ratio of 0.74. The combination of a large
fraction of neutron absorption in natural 6Li
(62%), a sharp neutron response peak, high light
yield, and large
ratio makes Rb2LiYBr6:Ce3+
an efficient scintillator for thermal neutron detection.