Ionization chamber for $sup 222$Rn measurements

Journal Article · Mon Jan 01 04:00:00 EST 1973 · Nucl. Instrum. Methods, v. 113, no. 4, pp. 583-588

OSTI ID:4373471

Hoegberg, S A.C.; Gustavsson, J E

A 4-l ionization chamber for /sup 225/Ra determination for corrections in uranium/thorium age estimations is described. By measuring the activity of / sup 222/Rn in secular equilibrium with /sup 226/Ra, the /sup 22 6/Ra activity of a sample can be determined. The sample is kept in a flask for about one month to achieve secular equilibrium. By flushing nitrogen through the sample liquid, the radon is tnansferred into the counter. Integral counting is used. The highvoltage characteristics show a slope of less than 0.1% per 100 V. A discriminator shift of 1% causes a 0.2% change in the counting rate. Activities in the order of 0.01 dpm can be detected with this counter. (auth)

• Research Organization: Uppsala Univ.
• NSA Number: NSA-29-012770
• OSTI ID: 4373471
• Journal Information: Nucl. Instrum. Methods, v. 113, no. 4, pp. 583-588, Journal Name: Nucl. Instrum. Methods, v. 113, no. 4, pp. 583-588; ISSN NUIMA
• Country of Publication: Country unknown/Code not available
• Language: English

Related Subjects

*IONIZATION CHAMBERS-- PERFORMANCE
*ISOTOPE DATING
*RADIUM 226-- RADIOMETRIC ANALYSIS
*RADON 222-- RADIOMETRIC ANALYSIS
BACKGROUND RADIATION
CALIBRATION
CORRECTIONS
N40130 --Chemistry--Analytical & Separations Chemistry--Radiometric & Radiochemical Procedures
N44400 --Environmental & Earth Sciences--Radiometric Techniques
N46110* --Instrumentation--Radiation Detection Instruments-- General Detectors & Monitors