Two independent beam stoppers have been developed for improving the beam separation of the gas-filled recoil ion separator GARIS-II. Performance of these supplemental beam stoppers was investigated by using the ²⁰⁸Pb (${}^{18}\mathrm{O},3\mathrm{n}$) ²²³Th reaction. A160-fold enhancement of the signal-to-noise ratio at the GARIS-II focal plane was observed.

中文翻译：

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通过改进GARIS-II中的束塞，减少源自初级束的污染物

已经开发出两个独立的束塞，以改善充气反冲离子分离器GARIS-II的束分离。这些补充束流塞的性能通过使用²⁰⁸ Pb（${}^{\mathrm{18岁}}\mathrm{Ø}，3\mathrm{ñ}$）²²³ Th反应。观察到GARIS-II焦平面信噪比提高了160倍。