The influence of radon daugther concentration in air of gamma spectrometer background

Kloke, F.C.; Smith, E.T.; Kahn, Bernd

doi:10.1016/0029-554x(65)90259-4

Cited by 5 publications

(1 citation statement)

References 3 publications

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“…Replicate measurements for all other measurements are considerably more variable. The greater variability is attributed to continual 222Rn fluctuations in room air around the detector (Kloke et al 1965) that affect the 214Pb and 214Bi…”

Section: Resultsmentioning

confidence: 98%

Analysis of 228Ra and 226Ra in Public Water Supplies by a Gamma-ray Spectrometer

Kahn¹,

Rosson²,

Cantrell³

1990

Health Physics

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Methods for measuring 228Ra were reviewed to select a brief and simple screening procedure under NIPDW Regulations for public water supplies. A two-step method was considered to concentrate Ra by evaporation or co-precipitation and to count it with a gas ionization detector, a liquid-scintillation detector, or a Ge detector with multichannel analyzer. Gross beta particle counting appears to be feasible for screening to meet the 0.04 Bq L-1 detection limit. One can utilize the same sample volume as currently collected and measure radiation with commonly available equipment in reasonable time. The required sample volumes were estimated on the basis of known counting efficiencies and background count rates. Gamma-ray spectral analysis is the recommended option, however, because 226Ra and 228Ra can be determined directly and simultaneously. Several aspects of the method were examined to assure that the concentration procedure is nearly quantitative and that the detection limit can be reached with a 3.8-L sample in a 6000-s counting period. The method was tested with Ra tracer solutions and EPA intercomparison samples over the range of 0.04 to 1 Bq L-1. It was found appropriate for 228Ra and 226Ra analyses.

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Section: Resultsmentioning

confidence: 98%

Analysis of 228Ra and 226Ra in Public Water Supplies by a Gamma-ray Spectrometer

Kahn¹,

Rosson²,

Cantrell³

1990

Health Physics

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Reduction of the background in a NaI(Tl) scintillation spectrometer by the use of Geiger anticoincidence and massive shielding

Stenberg

1971

Nuclear Instruments and Methods

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Influence of electrostatic precipitators on the background counting rate of a sensitive whole-body radioactivity monitor

Parthasarathy

1975

Nuclear Instruments and Methods

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The influence of radon daugther concentration in air of gamma spectrometer background

Cited by 5 publications

References 3 publications

Analysis of 228Ra and 226Ra in Public Water Supplies by a Gamma-ray Spectrometer

Analysis of 228Ra and 226Ra in Public Water Supplies by a Gamma-ray Spectrometer

Reduction of the background in a NaI(Tl) scintillation spectrometer by the use of Geiger anticoincidence and massive shielding

Influence of electrostatic precipitators on the background counting rate of a sensitive whole-body radioactivity monitor

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