Author/Authors :
Miyahara، نويسنده , , Hiroshi and Katoh، نويسنده , , Keiji and Ikeda، نويسنده , , Keiichi and Fujiki، نويسنده , , Kazuo and Nishinaka، نويسنده , , Ichirou and Tsukada، نويسنده , , Kazuaki and Nagame، نويسنده , , Yuichiro and Asai، نويسنده , , Masato and Ichikawa، نويسنده , , Sin-ichi and Haba، نويسنده , , Hiromitsu، نويسنده ,
Abstract :
The γ-ray emission probability of 149Eu was determined from the measurements of disintegration rates and γ-ray spectra of sources using a 4πβ-γ coincidence apparatus with a live-timed two-dimensional data-acquisition system. The determined emission probabilities of the 277.1 and 327.5 keV γ-rays were 0.0413±0.0003 and 0.0475±0.0003, respectively. These results meant that the evaluated values were underestimated by about 15%. Finally, new values of the decay parameters were deduced from them.
Keywords :
Gamma-ray spectrum , Gamma-ray emission probability , Coincidence measurement , Europium-149 , Disintegration rate , Improvement of certainty
