Cherenkov light detection as a velocity selector for uranium fission products at intermediate energies
Cherenkov light detection as a velocity selector for uranium fission products at intermediate energies
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DOI：
10.1016/j.nima.2014.04.021
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发表时间：
2014-12
影响因子：
1.4
通讯作者：
Takayuki Yamaguchi;A. Enomoto;J. Kouno;S. Yamaki;S. Matsunaga;F. Suzaki;Takeshi Suzuki;Y. Abe;D. Nagae;S. Okada;A. Ozawa;Y. Saito;K. Sawahata;A. Kitagawa;S. Sato
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文献类型：
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作者：
Takayuki Yamaguchi;A. Enomoto;J. Kouno;S. Yamaki;S. Matsunaga;F. Suzaki;Takeshi Suzuki;Y. Abe;D. Nagae;S. Okada;A. Ozawa;Y. Saito;K. Sawahata;A. Kitagawa;S. Sato
利用切伦科夫光探测技术可以提高碎片分离器产生的中能放射性离子束的飞行中粒子分离能力。切伦科夫光发射的锥角作为光束速度的函数而变化。这可以被利用作为次级束的速度选择器。利用HIMAC同步加速器装置上的重离子束，测量了几种高折射率（n= 1.9~ 2.1）薄辐射体的切伦科夫光角分布。对于能量为500 MeV/核子的56 Fe束，速度分辨率达到~ 10− 3。结合传统的刚性选择技术，再加上能量损失分析，本方法将能够有效地选择一个外来物种从大量的各种核素，如铀裂变产物在BigRIPS碎片分离器位于RI梁厂。
The in-flight particle separation capability of intermediate-energy radioactive ion (RI) beams produced at a fragment separator can be improved with the Cherenkov light detection technique. The cone angle of Cherenkov light emission varies as a function of beam velocity. This can be exploited as a velocity selector for secondary beams. Using heavy ion beams available at the HIMAC synchrotron facility, the Cherenkov light angular distribution was measured for several thin radiators with high refractive indices (n= 1.9~ 2.1). A velocity resolution of~ 10− 3 was achieved for a 56 Fe beam with an energy of 500 MeV/nucleon. Combined with the conventional rigidity selection technique coupled with energy-loss analysis, the present method will enable the efficient selection of an exotic species from huge amounts of various nuclides, such as uranium fission products at the BigRIPS fragment separator located at the RI Beam Factory.