Sharma SK, Thomas J, Pandian MS, Rao PS, Gartia RK, Singhvi AK. Exploring stable thermoluminescence signal in natural Barite (BaSO4) for retrospective dosimetry.
Appl Radiat Isot 2015;
105:198-203. [PMID:
26325582 DOI:
10.1016/j.apradiso.2015.08.035]
[Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2015] [Revised: 08/25/2015] [Accepted: 08/25/2015] [Indexed: 11/26/2022]
Abstract
We explore the possible use of Barite (BaSO4) for radiation dosimetry and geochronology using thermoluminescence technique. Natural Barite with Mn as an impurity has a glow peak at 608K with a minimum detectable dose of 1.45±0.12mGy. This peak shows ~35% fading on 30 days of storage time and is photo-bleachable with excellent reproducibility on repeated read-out. The sensitivity changes with dose and evidence of athermal fading is also seen. We infer that the signal can be used for both retrospective dosimetry and geochronology of young deposits extending to 20ka.
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