Radiometric method for determining concentration of naturally oc

Details Radiometric method for determining concentration of naturally oc Radiometric method for determining concentration of naturally oc

1982-01-22

1984-10-09

Howell, Janice A.

Radiant energy

Invisible radiant energy responsive electric signalling

With or including a luminophor

250366, G01T 120

Patent

active

044763883

ABSTRACT:
The proposed method essentially consists in that a sample of a substance is placed between two scintillators in immediate contact therewith whereupon said sample is hermetically sealed. Arranged in close proximity to each scintillator is a photomultiplier tube recording ionizing .alpha.- and .beta.-radiation. A selector is utilized to select pulses corresponding to .alpha.- and .beta.-particles, and delayed coincidence circuits of a recording element separate and record .beta.-.alpha. and .alpha.-.alpha. cascade pairs of delayed coincidences of RaC, ThC, and AcA radionuclides. Flows are measured twice at a predetermined time interval to account for emanation build-up tendency and concentration of isotopes of radium is determined from the formula ##EQU1## where q.sub.Ra.sup.A =concentration of a given isotope of radium;

REFERENCES:
patent: 3114835 (1963-12-01), Packard
patent: 3767915 (1973-10-01), Battist
patent: 3914602 (1975-10-01), Goldstein
patent: 4298796 (1981-11-01), Warner et al.

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