A CALIBRATION TECHNIQUE FOR THE DETERMINATION OF RADON-222 AND ITS APPLICATION TO VARIOUS MEASURING INSTRUMENTS
Technical Report
·
OSTI ID:4747784
A series of Ra solutions ranging from 10/sup 12/ to 10/sup -7/ curies was compared and standardized for the calibration of instruments used for measuring Rn. Three instruments for measuring Rn in breath, in laboratory air and in boreholes used in U prospecting, were calibrated using a known quantity of Rn. For the Rn-in-breath apparatus the mean radon activity required to double background was 4.7 x 10/sup -14/ c/l (efficiency 42%) and the limit of detection was 10/sup -14/ c/l representing approximately 10/sup -9/ curies or 0.01 maximum permissible burdens of Ra in the body. The exhaled Rn fraction determined for 5 subjects with known Ra burdens varied from 0.57 to 0.75. The Rn-inair apparatus had a Rn sensitivity of 4 counts per second per 10/sup -10/ c/l and a limit of detection of 5 x 10/sup -12/ c/l. The Rn-in-borehole monitor gave 1.7 counts per minute from 10/sup -11/ c/l and had a limit of detection of 2 x 10/sup -12/ c/l. (auth)
- Research Organization:
- United Kingdom Atomic Energy Authority. Research Group. Atomic Energy Research Establishment, Harwell, Berks, England
- NSA Number:
- NSA-17-016417
- OSTI ID:
- 4747784
- Report Number(s):
- AERE-R-4165
- Country of Publication:
- United Kingdom
- Language:
- English
Similar Records
Radium-226 body burden in U miners by measurement of Rn in exhaled breath
Direct determination of /sup 222/Rn gas using the electret to remove daughters at formation
Ionization chamber for $sup 222$Rn measurements
Journal Article
·
Fri Jan 31 23:00:00 EST 1986
· Health Phys.; (United States)
·
OSTI ID:5737584
Direct determination of /sup 222/Rn gas using the electret to remove daughters at formation
Technical Report
·
Wed Dec 31 23:00:00 EST 1980
·
OSTI ID:5640925
Ionization chamber for $sup 222$Rn measurements
Journal Article
·
Sun Dec 31 23:00:00 EST 1972
· Nucl. Instrum. Methods, v. 113, no. 4, pp. 583-588
·
OSTI ID:4373471