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- W2018459444 abstract "Abstract 49 Ca can be used to extend the efficiency calibration and rough energy calibration of a Ge γ-ray detector to almost 5 MeV. Spectra with good statistics can be obtained by multiple neutron irradiations of natural calcium. For calibration purposes the most useful γ-rays are 3084, 4072, and 4738 keV, for which we have obtained intensities of 90.72(4)%, 8.12(3)%, and 0.281(6)%, respectively. There is little coincidence summing of γ-rays in the decay. The absence of summing and the pattern of energies and intensities make 49 Ca particularly useful in measuring full energy and annihilation escape efficiencies for small source-to-detector distances. We have acquired over 50 spectra with a large, well-characterized Ge detector and have determined the intensities of all observable γ-rays, six of which have not been reported previously." @default.
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- W2018459444 date "2003-06-01" @default.
- W2018459444 modified "2023-09-27" @default.
- W2018459444 title "Characterization of 49Ca as a γ-ray intensity standard" @default.
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- W2018459444 doi "https://doi.org/10.1016/s0168-9002(03)01009-x" @default.
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