Improved growth and scintillation properties of intrinsic, non-hygroscopic scintillator Cs₂HfCl₆

Journal Article · 27 September 2019 · Journal of Luminescence

DOI: https://doi.org/10.1016/j.jlumin.2019.116784 · OSTI ID:1802760

Ariesanti, E. ^[1]; Hawrami, R. ^[1]; Burger, A. ^[1]; Motakef, S. ^[2]

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1. Fisk Univ., Nashville, TN (United States)
2. CapeSym, Inc., Natick, MA (United States)

This paper focuses on recent successful and improved growth runs of single phase Cs₂HfCl₆ (CHC) as well as improvement to its radiometric and scintillation performance. Two single crystal CHC boules of 15 mm in diameter are grown using the vertical Bridgman method. Samples retrieved from each boule are characterized for their optical and scintillation properties. Energy resolution of 2.8% (FWHM) at 662 keV has been obtained. Gamma-ray non-proportionality of CHC is compared to those of NaI:Tl and BGO. Decay times are measured to be at least 246 ns (13%) and 3.3 μs (87%) for CHC, an improvement to previously reported values. In this paper we also present growth and scintillation performance of Cs₂Hf(Cl_1-xBr_x)₆ with Cl/Br = 2/1 relation (CHC/B), as well as its scintillation decay times.

• Research Organization: CapeSym, Inc., Natick, MA (United States)
• Sponsoring Organization: USDOE Office of Science (SC), Engineering & Technology. Office of Small Business Innovation Research (SBIR) and Small Business Technology Transfer (STTR) Programs; USDOE
• Grant/Contract Number: SC0015733
• OSTI ID: 1802760
• Alternate ID(s): OSTI ID: 1567723
• Journal Information: Journal of Luminescence, Vol. 217; ISSN 0022-2313
• Publisher: ElsevierCopyright Statement
• Country of Publication: United States
• Language: English