Fabrication Methodology of Enhanced Stability Room Temperature TlBr Gamma Detectors

Autor:	Lars F. Voss, S.A. Payne, Rebecca J. Nikolic, Ted A. Laurence, P. R. Beck, Art J. Nelson, R. T. Graff, Leonard J. Cirignano, Kanai S. Shah, Hadong Kim, Adam M. Conway
Rok vydání:	2013
Předmět:	Nuclear and High Energy Physics Fabrication Materials science Spectrometer Band gap business.industry Detector Wide-bandgap semiconductor Spectral line Nuclear Energy and Engineering Electrode Optoelectronics Atomic number Electrical and Electronic Engineering business
Zdroj:	IEEE Transactions on Nuclear Science. 60:1231-1236
ISSN:	1558-1578 0018-9499
Popis:	Thallium bromide (TlBr) is a material of interest for use in room temperature gamma ray detector applications due to is wide bandgap 2.7 eV and high average atomic number (Tl 81, Br 35). Researchers have achieved energy resolutions of 1.3% at 662 keV, demonstrating the potential of this material system. However, these detectors are known to polarize using conventional configurations, limiting their use. While high quality material is a critical starting point for excellent detector performance, we show that the room temperature stability of planar TlBr gamma spectrometers can be significantly enhanced by treatment with both hydrofluoric and hydrochloric acid. By incorporating F or Cl into the surface of TlBr, current instabilities are eliminated and the longer term current of the detectors remains unchanged. In addition the choice of electrode metal is shown to have a dramatic effect on the long term stability of TlBr detector performance 241Am spectra are also shown to be more stable for extended periods; detectors have been held at 4000 V/cm for 50 days with less than 10% degradation in peak centroid position.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::178932f79f63c55d69d601afccaf7ecf https://doi.org/10.1109/tns.2013.2252363 Zobrazit plný text záznamu