论文标题
蒙特利尔X17搜索的状态
Status of the X17 search in Montreal
论文作者
论文摘要
在蒙特利尔串联加速器上，正在建立一个实验，以使用Daphne实验周围的多线比例室和闪烁杆来测量核激发态衰减的内部对产生。验收覆盖的固体角度接近4 $π$。前置放大器和数据采集硬件已经设计和测试。安装在Al箔上的水冷$^7 $ LIF目标位于光束线的薄碳纤维部分中。该实验首先将重点放在对18.15 MEV $^8 $ BE的内部对创建的测量上。假设对X17的电子产品生产率进行了Atomki评估，Geant4模拟可以预测在大约两周的数据中使用质子束2 $μ$的数据，对清晰信号进行了观察。 IPC测量最终可以扩展到$^8 $的巨大偶极共振，以及其他核，尤其是$^{10} $ b。
At the Montreal Tandem accelerator, an experiment is being set up to measure internal pair creation from the decay of nuclear excited states using a multiwire proportional chamber and scintillator bars surrounding it from the DAPHNE experiment. The acceptance covers a solid angle of nearly 4$π$. Preamplifiers and the data acquisition hardware have been designed and tested. The water-cooled $^7$LiF target, mounted on an Al foil is in a thin carbon fiber section of the beamline. The experiment will focus at first on a measurement of the internal pair creation from the 18.15 MeV state of $^8$Be. Assuming the ATOMKI evaluation of the electron-pair production rate from X17, a Geant4 simulation predicts observation of a clear signal after about two weeks of data taking with a 2 $μ$A proton beam. The IPC measurement could eventually be extended to the giant dipole resonance of $^8$Be, as well as to other nuclei, in particular to $^{10}$B.
