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Title: Determination of radium-226 by high-resolution alpha spectrometry

Abstract

Condition were determined under which high resolution and accurate and reliable results can be obtained. Refractory solids are dissolved completely by fusion with KF and Ba-133 tracer. The fluoride cake is then transposed with sulfuric acid to a pyrosulfate fusion. Radium is precipitated with barium by addition of lead perchlorate to a dilute HCl solution of the pyrosulfate cake. The resulting insoluble sulfates are dissolved in an alkaline solution of DTPA and the Ra and Ba sulfates are reprecipitated with acetic acid to produce very small crystals. The precipitate is mounted on 0.1-..mu..m membrane filter and analyzed by alpha spectrometry. Water samples are partially evaporated and treated similarly. Resolution, almost as good as with actinides electrodeposited on polished steel plates, is about 60 keV full-width-half-maximum with 100 ..mu..g of barium on a 1-inch filter with a 450 mm/sup 2/ detector at 20% counting efficiency. Recovery is about 97%. One solid sample can be prepared for counting in less than 2 hours. Methods are discussed for ensuring reliability of the results. Severe contamination of the surface-barrier detector by polonium-210 and recoil products is discussed.

Authors:
Publication Date:
Research Org.:
EG and G Idaho, Inc., Idaho Falls (USA)
OSTI Identifier:
5615503
Report Number(s):
EGG-M-15283; CONF-8310157-2
ON: DE84002894
DOE Contract Number:  
AC07-76ID01570
Resource Type:
Conference
Resource Relation:
Conference: 29. annual conference on bioassay, analytical and environmental chemistry, Seattle, WA, USA, 12 Oct 1983
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; RADIUM 226; ALPHA SPECTROSCOPY; ALPHA SPECTRA; BARIUM 133; BARIUM SULFATES; CONTAMINATION; DISSOLUTION; POLONIUM 210; PRECIPITATION; RELIABILITY; RESOLUTION; SAMPLE PREPARATION; SEPARATION PROCESSES; SURFACE BARRIER DETECTORS; ALKALINE EARTH ISOTOPES; ALKALINE EARTH METAL COMPOUNDS; ALPHA DECAY RADIOISOTOPES; BARIUM COMPOUNDS; BARIUM ISOTOPES; BETA DECAY RADIOISOTOPES; DAYS LIVING RADIOISOTOPES; ELECTRON CAPTURE RADIOISOTOPES; EVEN-EVEN NUCLEI; EVEN-ODD NUCLEI; HEAVY NUCLEI; INTERMEDIATE MASS NUCLEI; INTERNAL CONVERSION RADIOISOTOPES; ISOMERIC TRANSITION ISOTOPES; ISOTOPES; MEASURING INSTRUMENTS; NUCLEI; OXYGEN COMPOUNDS; POLONIUM ISOTOPES; RADIATION DETECTORS; RADIOISOTOPES; RADIUM ISOTOPES; SEMICONDUCTOR DETECTORS; SPECTRA; SPECTROSCOPY; SULFATES; SULFUR COMPOUNDS; YEARS LIVING RADIOISOTOPES; 400103* - Radiometric & Radiochemical Procedures- (-1987)

Citation Formats

Sill, C W. Determination of radium-226 by high-resolution alpha spectrometry. United States: N. p., 1983. Web.
Sill, C W. Determination of radium-226 by high-resolution alpha spectrometry. United States.
Sill, C W. Sat . "Determination of radium-226 by high-resolution alpha spectrometry". United States.
@article{osti_5615503,
title = {Determination of radium-226 by high-resolution alpha spectrometry},
author = {Sill, C W},
abstractNote = {Condition were determined under which high resolution and accurate and reliable results can be obtained. Refractory solids are dissolved completely by fusion with KF and Ba-133 tracer. The fluoride cake is then transposed with sulfuric acid to a pyrosulfate fusion. Radium is precipitated with barium by addition of lead perchlorate to a dilute HCl solution of the pyrosulfate cake. The resulting insoluble sulfates are dissolved in an alkaline solution of DTPA and the Ra and Ba sulfates are reprecipitated with acetic acid to produce very small crystals. The precipitate is mounted on 0.1-..mu..m membrane filter and analyzed by alpha spectrometry. Water samples are partially evaporated and treated similarly. Resolution, almost as good as with actinides electrodeposited on polished steel plates, is about 60 keV full-width-half-maximum with 100 ..mu..g of barium on a 1-inch filter with a 450 mm/sup 2/ detector at 20% counting efficiency. Recovery is about 97%. One solid sample can be prepared for counting in less than 2 hours. Methods are discussed for ensuring reliability of the results. Severe contamination of the surface-barrier detector by polonium-210 and recoil products is discussed.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1983},
month = {1}
}

Conference:
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