Crystal Growth and Scintillation Properties of

• Published in: IEEE transactions on nuclear science 2009-06, Vol.56 (3), p.982-985
• Main Authors: Kim, Sunghwan, Lee, Joon Il, Doh, Sih-Hong, Kim, Hong Joo, Park, Hwanbae, Kang, Heedong, Kim, Dosung, U, Hong
• Format: Article
• Language: English
• Subjects: Biomedical imaging; Bridgman; Cerium; crystal growth; Crystalline materials; Crystals; Energy resolution; Fluorescence; Furnaces; Physics; Radiation detectors; scintillator; Temperature; {\hbox {Rb}}_{2} {\hbox {CeBr}} _{5}
• ISSN: 0018-9499; 1558-1578
• DOI: 10.1109/TNS.2009.2018838

In this paper, crystal growth and scintillation properties of Rb 2 CeBr 5 crystal are presented. The crystal was grown with the Bridgman method using a two zone transparent furnace. The investigation of scintillation properties of the crystal were performed under the excitation by X-ray and gamma;-ray at room temperature. The emission spectrum of the Rb 2 CeBr 5 was observed in the range of 360 ~ 440 nm, peaking at 390.5 nm, which is due to the 5d rarr 4f transitions of the Ce 3+ . The decay time of the Ce 3+ emission was composed two components. The fast component was 56.1 ns (98.8%), and the slow component was 329.9 ns (1.2%). The energy resolution of the crystal was obtained to be 6.9% for the 137 Cs 662 keV gamma-ray. The absolute light yield of the Rb 2 CeBr 5 crystal is about 34,000 phs/MeV, and the non-proportionality of the crystal was also measured.