论文标题
脉冲冷中子的中子寿命测量
Neutron lifetime measurement with pulsed cold neutrons
论文作者
论文摘要
中子寿命是通过将腐烂速率与日本质子加速器研究复合物（J-PARC）的螺旋中性中子束的反应速率与脉冲中子束的反应速率进行比较来衡量的。衰减率和反应速率是通过同时检测中子衰减中的电子和$^3 $ He（n，p）$^3 $ H的质子的质子来确定的，使用燃气室中有稀释的$^3 $ HE。测得的中子寿命为$ 898 \，\ pm \，10 \，_ {\ rm stat} \，^{+15} _ { - 18} \，_ {\ rm sys} \，$ s。
The neutron lifetime has been measured by comparing the decay rate with the reaction rate of $^3$He nuclei of a pulsed neutron beam from the spallation neutron source at the Japan Proton Accelerator Research Complex (J-PARC). The decay rate and the reaction rate were determined by simultaneously detecting electrons from the neutron decay and protons from the $^3$He(n,p)$^3$H reaction using a gas chamber of which working gas contains diluted $^3$He. The measured neutron lifetime was $898\,\pm\,10\,_{\rm stat}\,^{+15}_{-18}\,_{\rm sys}\,$s.
