Optical and scintillation properties of CsBa2I5:Eu2+

Alekhin, Mikhail S.; Biner, Daniel; Krämer, Karl; Dorenbos, Pieter (2014). Optical and scintillation properties of CsBa2I5:Eu2+. Journal of luminescence, 145, pp. 723-728. North-Holland 10.1016/j.jlumin.2013.08.058

[img] Text
232_Alekhin_JL_CaBa2I5_Ce.pdf - Published Version
Restricted to registered users only
Available under License Publisher holds Copyright.

Download (938kB) | Request a copy

The scintillation and luminescence properties of pure CsBa2I5 and CsBa2I5 doped with 0.5% Eu and 5% Eu were studied between 78 K and 600 K. Single crystals were grown by the vertical Bridgman method from the melt. CsBa2I5:5% Eu showed a light yield of 80,000 photons/MeV, an energy resolution of 2.3% for the 662 key full absorption peak, and an excellent proportional response. Two broad emission bands centered at 400 nm and 600 nm were observed in the radioluminescence spectrum of pure CsBa2I5. The Eu2+ 5d-4f emission band was observed at 430 nm. The radiative lifetime of the Eu2+ excited state was determined as 350 ns. With increasing temperature and Eu concentration the Eu2+ emission shifts to longer wavelengths and its decay time lengthens as a result of self-absorption of the Eu2+ emission. Multiple thermoluminescence glow peaks and a sharp decrease of the light yield at temperatures below 200 K were observed and related to the presence of the charge carrier traps in CsBa2I5:Eu.

Item Type:

Journal Article (Original Article)

Division/Institute:

08 Faculty of Science > Departement of Chemistry and Biochemistry

UniBE Contributor:

Biner, Daniel and Krämer, Karl

Subjects:

500 Science > 540 Chemistry

ISSN:

0022-2313

Publisher:

North-Holland

Language:

English

Submitter:

Karl Krämer

Date Deposited:

30 Oct 2014 09:24

Last Modified:

26 Aug 2015 15:02

Publisher DOI:

10.1016/j.jlumin.2013.08.058

BORIS DOI:

10.7892/boris.59698

URI:

https://boris.unibe.ch/id/eprint/59698

Actions (login required)

Edit item Edit item
Provide Feedback