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 $\Delta E-E$ of the beam particles. In addition, the range $R$ in MUSIC was determined with a resolution of 1.4 mm ($\sigma$) by using the energy ratio obtained from multi-sampled energy deposits. The atomic number was determined from the $E-R$ correlation with a resolution of 0.15 ($\sigma$). To distinguish the charge state of the RI beam after the secondary reaction target, the range with the correction for the $\beta$ dependence was combined with the mass-to-charge ratio determined from the time-of-flight and magnetic-rigidity measurements. A 5.6 $\sigma$ separation was obtained between ⁹²Zr${}^{40+}$ and ⁹⁰Zr${}^{39+}$ using these two values.

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$\Delta Ë-Ë$束粒子。另外，范围$\mathrm{[R}$ MUSIC中的分辨率为1.4 mm（$\sigma$），使用从多次采样的能量存储中获得的能量比。原子序数由$Ë-\mathrm{[R}$ 分辨率为0.15（$\sigma$）。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。$\beta$依赖与飞行时间和磁刚度测量确定的质荷比结合在一起。5.6$\sigma$在⁹² Zr之间获得了分离${}^{40+}$和⁹⁰ Zr${}^{39+}$ 使用这两个值。