Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Energy-control and novel particle-identification methods combined with range in a multi-sampling ionization chamber for experiments using slowed-down RI beams
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment ( IF 1.5 ) Pub Date : 2020-09-22 , DOI: 10.1016/j.nima.2020.164687
T. Sumikama , D.S. Ahn , N. Fukuda , Y. Shimizu , H. Suzuki , H. Takeda , H. Wang , K. Yoshida , J. Amano , N. Chiga , K. Chikaato , A. Hirayama , N. Inabe , S. Kawase , S. Kubono , M. Matsushita , S. Michimasa , K. Nakano , H. Otsu , H. Sakurai , A. Saito , S. Shimoura , J. Suwa , M. Takechi , S. Takeuchi , Y. Togano , T. Tomai , Y. Watanabe

A method for controlling the energy of slowed-down RI beams with the goal energy of 20 MeV/u was developed at the RIKEN RI Beam Factory. The 93Zr beam energy was successfully tuned to 20.2 MeV/u in a single step by adjusting its momentum selected by the first dipole magnet after a primary target. A method for particle identification was developed for the secondary reaction fragments at 50 MeV/u. The dispersive mode was applied to the ZeroDegree spectrometer to measure the momentum at the final focus F11. The reaction fragments were stopped in the multi-sampling ionization chamber (MUSIC) placed at F11, which measured the ΔEE of the beam particles. In addition, the range R in MUSIC was determined with a resolution of 1.4 mm (σ) by using the energy ratio obtained from multi-sampled energy deposits. The atomic number was determined from the ER correlation with a resolution of 0.15 (σ). To distinguish the charge state of the RI beam after the secondary reaction target, the range with the correction for the β dependence was combined with the mass-to-charge ratio determined from the time-of-flight and magnetic-rigidity measurements. A 5.6 σ separation was obtained between 92Zr40+ and 90Zr39+ using these two values.



中文翻译:

能量控制和新颖的粒子识别方法结合多采样电离室中的射程,用于减慢的RI束实验

在RIKEN RI Beam Factory,开发了一种用于控制目标能量为20 MeV / u的减速RI光束能量的方法。通过调整主要目标之后的第一个偶极磁体选择的动量,可以将93 Zr束能量一步一步成功地调谐到20.2 MeV / u。为次级反应片段开发了一种以50 MeV / u的颗粒识别方法。将色散模式应用于ZeroDegree光谱仪,以测量最终焦点F11处的动量。反应片段在F11的多采样电离室(MUSIC)中停止,该电离室测量了ΔË-Ë束粒子。另外,范围[R MUSIC中的分辨率为1.4 mm(σ),使用从多次采样的能量存储中获得的能量比。原子序数由Ë-[R 分辨率为0.15(σ)。为了区分次要反应目标之后RI束的电荷状态,需要对校正范围进行修正。β依赖与飞行时间和磁刚度测量确定的质荷比结合在一起。5.6σ92 Zr之间获得了分离40+90 Zr39+ 使用这两个值。

更新日期:2020-10-12
down
wechat
bug