Abstracts 2007

Abstract of Publication No. 562

M. D. Birowosuto, P. Dorenbos, J. T. M. de Haas, C. W. E. van Eijk, K. W. Krämer and H. U. Güdel
Thermal-neutron scintillator: Ce3+ activated Rb2LiYBr6
J. Appl. Phys. 101, 066107/1-3 (2007)      Full Text (PDF)      DOI-Link     

Abstract: 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 a/b 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 a/b ratio makes Rb2LiYBr6:Ce3+ an efficient scintillator for thermal neutron detection.

Last modified: 13.12.11 by Gabriela Frei