New Information on the Characteristics of 1 in. x 1 in. Cerium Bromide Scintillation Detectors

In view of the highly demanded new and accurate data on prompt gamma-ray emission in nuclear fission a major part of investigations is directed towards the selection of suitable detector systems. Here we have studied a new type of cyrstal scintillation detectors made from cerium-bromide (CeBr3). For the first time a full characterization of such a detector is presented in terms of energy resolution, pulse-height linearity, intrinsic activity and intrinsic timing resolution. In particular the later one is very important for prompt fission gamma-ray studies, because the presence of fast neutrons, emitted in fission too, requires the time-of-flight method for their discrimination. The energy resolution has been found to be comparable to that of cerium-doped LaCl3 detectors at an efficiency comparable to the one of a LaBr3 detector of the same size. The intrinsic activity of the CeBr3 crystal was observed to be much lower compared to lanthanum halide crystals. The intrinsic timing resolution of a coaxial 1"x1" sized detector was measured relative to that of a previously characterized LaCl3 detector and found to be (326+-7)ps at Co-60 energies, which is in between those of a LaBr3 and a LaCl3 detector of same size.

BILLNERT Robert;  OBERSTEDT Stephan;  ANDREOTTI Erica;  HULT Mikael;  MARISSENS Gerd;  OBERSTEDT Andreas; 

2011-07-05

ELSEVIER SCIENCE BV

JRC63804

0168-9002,   

www.elsevier.com/locate/nima,    https://publications.jrc.ec.europa.eu/repository/handle/JRC63804,   

10.1016/j.nima.2011.05.034,