论文标题
高精度$ q $ - 价值测量证实了$^{135} $ cs的潜在抗肿瘤质量检测
High-precision $Q$-value measurement confirms the potential of $^{135}$Cs for antineutrino-mass detection
论文作者
论文摘要
$^{135} \ textrm {cs}（7/2^+）\ to \ to \，^{135} \ textrm {ba}（ba}（3/2^+）$直接测量第一次使用阶段的pectron，地面$^{135} \ textrm {cs}（7/2^+）\ to \ to \ to \ textrm {cs}（7/2^+）（3/2^+）$直接测量了第一次使用阶段的resrion resion（3/2^+）$， JYFLTRAP PENNING-TRAP设置。这是该$ Q $价值的第一个直接确定，其价值为268.66（30）\，KEV比2016年原子质量评估中当前采用的$ Q $ - 价值更精确。该测量结果证实，第一个独特的$β^ - $ - 衰减过渡$^{135} \ textrm {cs}（7/2^+）（7/2^+）\ to \ to \，^{135} \ textrm {ba}（ba}（ba}（ba}（11/2^ - ）$是antineutrino-mass衡量的$ quy- $ 0.44（31）$ KEV。这个$ q $ - 价值几乎比目前运行或计划的直接（反）中微子质量实验小的数量级。
The ground-state-to-ground-state $β$-decay $Q$-value of $^{135}\textrm{Cs}(7/2^+)\to\,^{135}\textrm{Ba}(3/2^+)$ was directly measured for the first time utilizing the Phase-Imaging Ion-Cyclotron Resonance (PI-ICR) technique at the JYFLTRAP Penning-trap setup. It is the first direct determination of this $Q$-value and its value of 268.66(30)\,keV is a factor of three more precise than the currently adopted $Q$-value in the Atomic Mass Evaluation 2016. Moreover, the $Q$-value deduced from the $β$-decay endpoint energy has been found to deviate from our result by approximately 6 standard deviations. The measurement confirms that the first-forbidden unique $β^-$-decay transition $^{135}\textrm{Cs}(7/2^+)\to\,^{135}\textrm{Ba}(11/2^-)$ is a candidate for antineutrino-mass measurements with an ultra-low $Q$-value of $0.44(31)$ keV. This $Q$-value is almost an order of magnitude smaller than in any presently running or planned direct (anti)neutrino-mass experiment.
