Activity ratios of thorium daughters in vivo [electronic resource].
- Published:
- Argonne, Ill. : Argonne National Laboratory, 1984.
Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy. - Physical Description:
- Pages: 14 : digital, PDF file
- Additional Creators:
- Argonne National Laboratory and United States. Department of Energy. Office of Scientific and Technical Information
Access Online
- Restrictions on Access:
- Free-to-read Unrestricted online access
- Summary:
- A computerized method of least squares has been used to analyze the /sup 228/Ac and /sup 212/Pb-/sup 212/Bi and daughter ..gamma..-ray spectra obtained in vivo from 133 former workers at a thorium refinery. In addition, the exhalation rate of /sup 220/Rn was determined for each subject and expressed as pCi of emanating /sup 224/Ra. This value was added to the /sup 212/Pb value determined from the ..gamma..-ray measurements to obtain the total /sup 224/Ra present, and the ratio of /sup 224/Ra to /sup 228/Ac was calculated. Values of the ratio ranged from 0.52 +- 0.32 to 2.1 +- 1.7, with a weighted mean of 0.92 +- 0.17. However, it appears that the ratio observed in a given case is characteristic for that case alone; the computed mean value may not be meaningful. The least squares fitting procedure and the overall calibration of the counting system were validated by measurements of /sup 224/Ra in the lungs of one subject postmortem, compared with results obtained from the same subject in vivo. 6 references, 5 figures.
- Report Numbers:
- E 1.99:conf-8410147-1
conf-8410147-1 - Subject(s):
- Other Subject(s):
- Daughter Products
- Body Burden
- Dosimetry
- Thorium 232
- Actinium 228
- Bismuth 212
- Gamma Spectra
- Gamma Spectroscopy
- In Vivo
- Isotope Ratio
- Lead 212
- Least Square Fit
- Radium 224
- Radon 220
- Actinide Isotopes
- Actinide Nuclei
- Actinium Isotopes
- Alkaline Earth Isotopes
- Alpha Decay Radioisotopes
- Beta Decay Radioisotopes
- Beta-Minus Decay Radioisotopes
- Bismuth Isotopes
- Days Living Radioisotopes
- Even-Even Nuclei
- Heavy Nuclei
- Hours Living Radioisotopes
- Isotopes
- Lead Isotopes
- Maximum-Likelihood Fit
- Nuclei
- Numerical Solution
- Odd-Odd Nuclei
- Radioisotopes
- Radium Isotopes
- Radon Isotopes
- Seconds Living Radioisotopes
- Spectra
- Spectroscopy
- Thorium Isotopes
- Years Living Radioisotopes
- Note:
- Published through SciTech Connect.
01/01/1984.
"conf-8410147-1"
"DE85000100"
Radiobiology of radium and thorotrast conference, Neuherberg, F.R. Germany, 29 Oct 1984.
Rundo, J.; Essling, M.A.; Toohey, R.E.; Sha, J.Y.; Pedersen, J.C.; Slane, J.M. - Funding Information:
- W-31-109-ENG-38
View MARC record | catkey: 14151211