论文标题
分子tritium的β衰变
Beta decay of molecular tritium
论文作者
论文摘要
分子TT形式的Tritium的β衰变是测量中微子质量的敏感实验的基础。最终的电子，振动和旋转激发可显着修改β频谱，并从理论中获得。我们报告了同位素HT的分支比与特定电离状态的测量。在两个之前，一致的测量值给出了HT与绑定的HHE $^+$ $离子的分支比率为89.5％，而93.2％的分支比与55-57％的理论预测非常分歧，这提出了对该理论在中性质量实验中的可靠性的担忧。我们的结果为56.5（6）％，与理论期望兼容，并且与先前的测量非常不同意。
The beta decay of tritium in the form of molecular TT is the basis of sensitive experiments to measure neutrino mass. The final-state electronic, vibrational, and rotational excitations modify the beta spectrum significantly, and are obtained from theory. We report measurements of the branching ratios to specific ionization states for the isotopolog HT. Two earlier, concordant measurements gave branching ratios of HT to the bound HHe$^+$ ion of 89.5% and 93.2%, in sharp disagreement with the theoretical prediction of 55-57%, raising concerns about the theory's reliability in neutrino mass experiments. Our result, 56.5(6)%, is compatible with the theoretical expectation and disagrees strongly with the previous measurements.
