Two-dimensional measurement of natural radioactivity of granitic rocks by photostimulated luminescence technique

Citation
M. Hareyama et al., Two-dimensional measurement of natural radioactivity of granitic rocks by photostimulated luminescence technique, GEOCHEM J, 34(1), 2000, pp. 1-9
Citations number
27
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Earth Sciences
Journal title
GEOCHEMICAL JOURNAL
ISSN journal
0016-7002 → ACNP
Volume
34
Issue
1
Year of publication
2000
Pages
1 - 9
Database
ISI
SICI code
0016-7002(2000)34:1<1:TMONRO>2.0.ZU;2-F
Abstract
Two-dimensional measurement of radiation produced by natural irradiation of granitic rocks was performed by the use of an imaging plate, which is a st orage film coated with photostimulated phosphor (BaFBr:Eu-2+). Radiation images of small volume specimens, such as thin sections were obta ined with the imaging plate. Irradiation images of granitic rocks are inhom ogeneous and the intensity of photostimulated luminescence per unit area, w hich is principally converted into the integrated dose, increases with the increasing potassium content in the rocks. The results of the present study indicate that the disintegration of K-40 is the dominant radiation source of granitic rocks. The imaging plate is a new research tool for the evaluat ion of the natural radioactive properties of geological materials and is ap plicable as a semi-quantitative two-dimensional dosimeter for natural radio activity.