Within the framework of EUROMET project No. 410, standardization of a 169Yb solution has been carried out and the gamma-ray emission probabilities at its decay have been measured. 169Yb activity was measured by the 4pibeta-gamma-coincidence extrapolation method. Special attention was paid to the measurement conditions associated with the existence of 316 keV metastable level of 169Tm (T approximately 0.66 micros). The 169Yb gamma-ray emission probabilities have been determined from the results of absolute activity measurements and data obtained using a coaxial Ge(Li) spectrometer.
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| http://dx.doi.org/10.1016/s0969-8043(99)00201-8 | DOI Listing |
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