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Application of CR-39 to the mapping of B in minerals and rocks
Abstracts--I lth ICSSNTD
URANIUM
G.
385
D E T E R M I N A T I O N IN W A T E R U S I N G S O L I D NUCLEAR TRACK DETECTORS. Espinosa,
A. M o r e n o ,
J.I.
STATE
Golzarri
I n s t i t u t o de F f s i c a , U N A M Apartado Postal 20-364 M~xico 20,D.F. MEXICO.
ABSTRACT A m e t h o d for d e t e c t i n g l o w c o n c e n t r a t i o n s p r e s e n t e d in t h i s work.
of U r a n i u m
in w a t e r
is
A C R - 3 9 is u s e d as d e t e c t o r , a n d as a p r o c e s s a c o n s e c u t i v e p r e etching and an electrochemical etching. Concentration measurement o f 1 p . p . m , a r e o b t a i n e d w i t h o u t the r e q u i r e m e n t o f a n e u t r o n flux. The results show high sensitivity and reproducibility, with a linear r e s p o n s e as a f u n c t i o n of u r a n i u m c o n t e n t s in the w a t e r . T h e r e f o r e , t h i s t e c h n i q u e r e s u l t s s u i t a b l e for m e a s u r i n g o f u r a n i u m c o n c e n t r a t i o n s in r i v e r s lakes, w a t e r s p r i n g s , etc.
APPLICATION OF CR-39 TO THE MAPPINGOF B IN MINERALSAND ROCKS V.K. Din and P. Henderson Department of Mineralogy, British Museum (Natural History), Cromwell Road, London SW7 5BD
ABSTRACT The application of CR-39 polycarbonate plastic to quantitative B mapping in mineral assemblages has been investigated. The investigation included the calibration of the detector material using standards prepared from speCrographic grade carbon powder and boric acid, and the determination of correction factors for the potentially interfering reactions 6Li(n,~)3H and 14N(n,p)14C. Samples and standards were irradiated with thermal neutrons for between 0.5 and 8 hours. The method is being applied to a suite of minerals from the Mendip Hills in southwest England. DETERMINATION OF U-CONTENT OF URANIUM -BEARING VEINS AND INCLUSIONS S.R. Hashemi-Nezhad*, S.A. Durrani** and R.K. Bull**
*Department of Physics, University of Tabriz, Tabriz, Iran **Department of Physics, University of Birmingham, Birmingham BI5 2TT, England
ABSTRACT Formulae are presented for the calculation of uranium contents of uranium-rich
URANIUM
G.
385
D E T E R M I N A T I O N IN W A T E R U S I N G S O L I D NUCLEAR TRACK DETECTORS. Espinosa,
A. M o r e n o ,
J.I.
STATE
Golzarri
I n s t i t u t o de F f s i c a , U N A M Apartado Postal 20-364 M~xico 20,D.F. MEXICO.
ABSTRACT A m e t h o d for d e t e c t i n g l o w c o n c e n t r a t i o n s p r e s e n t e d in t h i s work.
of U r a n i u m
in w a t e r
is
A C R - 3 9 is u s e d as d e t e c t o r , a n d as a p r o c e s s a c o n s e c u t i v e p r e etching and an electrochemical etching. Concentration measurement o f 1 p . p . m , a r e o b t a i n e d w i t h o u t the r e q u i r e m e n t o f a n e u t r o n flux. The results show high sensitivity and reproducibility, with a linear r e s p o n s e as a f u n c t i o n of u r a n i u m c o n t e n t s in the w a t e r . T h e r e f o r e , t h i s t e c h n i q u e r e s u l t s s u i t a b l e for m e a s u r i n g o f u r a n i u m c o n c e n t r a t i o n s in r i v e r s lakes, w a t e r s p r i n g s , etc.
APPLICATION OF CR-39 TO THE MAPPINGOF B IN MINERALSAND ROCKS V.K. Din and P. Henderson Department of Mineralogy, British Museum (Natural History), Cromwell Road, London SW7 5BD
ABSTRACT The application of CR-39 polycarbonate plastic to quantitative B mapping in mineral assemblages has been investigated. The investigation included the calibration of the detector material using standards prepared from speCrographic grade carbon powder and boric acid, and the determination of correction factors for the potentially interfering reactions 6Li(n,~)3H and 14N(n,p)14C. Samples and standards were irradiated with thermal neutrons for between 0.5 and 8 hours. The method is being applied to a suite of minerals from the Mendip Hills in southwest England. DETERMINATION OF U-CONTENT OF URANIUM -BEARING VEINS AND INCLUSIONS S.R. Hashemi-Nezhad*, S.A. Durrani** and R.K. Bull**
*Department of Physics, University of Tabriz, Tabriz, Iran **Department of Physics, University of Birmingham, Birmingham BI5 2TT, England
ABSTRACT Formulae are presented for the calculation of uranium contents of uranium-rich