SCINTILLATION SPECTROSCOPY MEASUREMENTS OF GAMMA-RAY ENERGIES - FROM SOURCES OF Y88, Mn54 and Zn65

摘要

A series of experiments employing Nal(Tl) scintillation spectroscopy techniques was performed to determine the energies of the strong gamma rays in the decays of Y88 , Mn54 , and Zn65. A variety of calibration sources and counter geometries were used, including some which employed coincidence techniques to observe "double-escape" peaks corresponding to the loss of 2m c. from the scintillator. Care was taken to avoid effects from drifts and to correct for nonlinearities of the system. The average gamma-ray energies measured are (1.840 + 0.002) Mev and (O.8988 + 0.0012) Mey for Y88 , (0.83^7 + 0.0011) Mev for Mn5 , and (l.UA + 0.00k) Mev for Zn 5. These values are consistent with averages of published values, but the quoted errors are smaller except in the case of Zn .When values were deduced for already well-known energies of other gamma-ray transitions, discrepancies between the present measurements and accepted values were consistent with quoted errors.