| 摘要 |
PCT No. PCT/SE84/00176 Sec. 371 Date Dec. 27, 1984 Sec. 102(e) Date Dec. 27, 1984 PCT Filed May 11, 1984 PCT Pub. No. WO84/04600 PCT Pub. Date Nov. 22, 1984.Method for calibrating a liquid scintillation counter comprising, for a number of reference solutions containing isotopes of known decay rates, the counting of a number of coincident pulses caused in at least two photodetectors by photons produced by the decay of the isotopes within a first known time interval, for obtaining the scintillation pulse frequency of each reference solution and the calculating of the counting efficiency for each reference solution by dividing said scintillation pulse frequency by the known decay rate. According to the invention, it is, for each reference solution, at first measured within a second known time interval, which completely or partially can overlap the said first one, how many photoelectrons the photons in each coincident scintillation pulse have caused in at least one photodetector, whereafter a calibration vector comprising at least one unknown calibration parameter is determined by fitting a function based on theoretical grounds containing said calibration vector to said experimentally determined counting efficiency and by fitting a function based on theoretical grounds containing said calibration vector, to said measured photoelectron numbers.
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