Growth and scintillation properties of a new red-emitting scintillator Rb.sub.2./sub.HfI.sub.6./sub. for the fiber-reading radiation monitor

0532948 - FZÚ 2021 RIV US eng J - Článek v odborném periodiku
Kodama, S. - Kurosawa, S. - Morishita, Y. - Usami, H. - Torii, T. - Hayashi, M. - Sasano, M. - Azuma, T. - Tanaka, H. - Kochurikhin, V.V. - Pejchal, Jan - Král, Robert - Yoshino, M. - Yamaji, A. - Toyoda, S. - Sato, H. - Ohashi, Y. - Yokota, Y. - Kamada, K. - Nikl, Martin - Yoshikawa, A.
Growth and scintillation properties of a new red-emitting scintillator Rb₂HfI₆ for the fiber-reading radiation monitor.
IEEE Transactions on Nuclear Science. Roč. 67, č. 6 (2020), s. 1055-1062. ISSN 0018-9499. E-ISSN 1558-1578
Grant CEP: GA ČR GJ18-17555Y
Institucionální podpora: RVO:68378271
Klíčová slova: fiber-reading gamma-ray detection * red emission * scintillators
Obor OECD: Condensed matter physics (including formerly solid state physics, supercond.)
Impakt faktor: 1.679, rok: 2020
Způsob publikování: Omezený přístup
https://doi.org/10.1109/TNS.2020.2976695

A new red-emitting halide scintillator ternary rubidium hafnium iodide (Rb2HfI6) was grown by the vertical Bridgman method in a quartz ampoule. Under X-ray irradiation, the Rb2HfI6 has a broad emission band at around 725 nm. The light output and energy resolution were determined to be ca. 40 000 photons/MeV and ca. 7.4% (full width at half-maximum at 662 keV), respectively. The Rb2HfI6 scintillation crystal was used to perform the gamma-ray detection test under high-dose irradiation condition from a 60Co source with an activity of ca. 100 TBq. The dynamic range of the Rb2HfI6 gamma-ray detection with a 20-m optical fiber was evaluated and compared with the previously developed Cs2HfI6 crystal and the conventional deep-red Cr:Al2O3 (ruby) scintillator. The gamma-ray doses from ca. 0.4 to ca. 1 kSv/h were successfully measured using Rb2HfI6 through the 20-m fiber.

Trvalý link: http://hdl.handle.net/11104/0311338