论文标题
$β^+$ ec和ECEC流程的改进限制在$^{74} $ SE中
Improved limits on $β^+$EC and ECEC processes in $^{74}$Se
论文作者
论文摘要
$β^+$ ec和$^{74} $ se的ECEC过程的新限制是使用600 cm $^3 $ hpge检测器以及由1600 g天然硒粉的外部来源获得的。对于不同的$β^+$ ec和ECEC过渡（对地面和激发态），获得的限制位于$ \ sim（0.2-4.8）\ times10^{19} $ yr，在90 \％c.l.特别是，对于潜在的共鸣过渡到1204.2 $^{74} $ ge的kev兴奋状态，下半寿命限制为$ 1.1 \ times10^{19} $ yr，at 90 \％c.l.已获得。讨论了提高此类测量敏感性的可能性。
New limits on $β^+$EC and ECEC processes in $^{74}$Se have been obtained using a 600 cm$^3$ HPGe detector and an external source consisting of 1600 g of a natural selenium powder. For different $β^+$EC and ECEC transitions (to the ground and excited states) obtained limits are on the level $\sim (0.2-4.8)\times10^{19}$ yr at 90\% C.L. In particular, for the potentially resonant transition into the 1204.2 keV excited state of $^{74}$Ge a lower half-life limit of $1.1\times10^{19}$ yr at 90\% C.L. has been obtained. Possibility to increase the sensitivity of such measurements is discussed.
