Exploring stable thermoluminescence signal in natural Barite (BaSO4) for retrospective dosimetry.
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.
AMO-Physics Division, Physical Research Laboratory, Ahmedabad 380009, India. Electronic address: suchindersharma@gmail.com.
Suchinder K
SK
Sharma
Pondicherry University, Puducherry 605 014, India.
Jugina
J
Thomas
Pondicherry University, Puducherry 605 014, India.
M S
MS
Pandian
Pondicherry University, Puducherry 605 014, India.
P S
PS
Rao
Manipur University, Imphal 795003, India.
R K
RK
Gartia
AMO-Physics Division, Physical Research Laboratory, Ahmedabad 380009, India.
Ashok K
AK
Singhvi
D001466:Barium Sulfate / Q000032:analysis* / Q000528:radiation effects*; D004578:Electron Spin Resonance Spectroscopy; D055593:Geological Phenomena; D006801:Humans; D008345:Manganese / Q000032:analysis; D011874:Radiometry / Q000379:methods; D015203:Reproducibility of Results; D012189:Retrospective Studies; D013819:Thermoluminescent Dosimetry / Q000379:methods*; D013997:Time Factors; D014961:X-Ray Diffraction
D001466:Barium Sulfate; D008345:Manganese
Barite; Dosimetry; Fading; Reproducibility; Sensitivity; Thermoluminescence; Trap depth