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NEUTRON EXPOSURE DOSIMETRY OF HUMANS BY IN VIVO GAMMA MEASUREMENT OF SODIUM- 24

Technical Report ·
OSTI ID:4211993
A procedure for neutron dosimetry of humans by in vivo gamma spectrometric measurement of the sodium-24 content of the human body is described. Specific calibration of the 9-inch-diameter x 4-inch-thick NaI scintillation crystal of the Y-12 In Vivo Radioactivity Measurement Facility for bedy sodium-24 is included. The apparent limit of detection, at an examination rate of one subject each fifteen to twenty minutes is 2.5 x 10/sup -3/ mu c sodium-24 in the body. The relationship of body sodium-24 to neutron dose is made on the basis of the 1958 Y-12 criticality accident and results in an apparent limit of detection of 12.5 millirads if the sodium-24 measurement is made within fifteen hours after neutron exposure. (auth)
Research Organization:
Union Carbide Nuclear Co. Y-12 Plant, Oak Ridge, Tenn.
DOE Contract Number:
W-7405-ENG-26
NSA Number:
NSA-14-009669
OSTI ID:
4211993
Report Number(s):
Y-1283
Country of Publication:
United States
Language:
English