Reduction Of Contaminants Originating From Primary Beam By Improving The Beam Stoppers In Garis-Ii

Sota Kimura,Daiya Kaji,Yuta Ito,Hiroari Miyatake,Kouji Morimoto,Peter Schury,Michiharu Wada

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT（2021）

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摘要

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 Pb-2(80)(O-18, 3n) Th-223 reaction. A160-fold enhancement of the signal-to-noise ratio at the GARIS-II focal plane was observed.

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关键词

Gas-filled recoil ion separator, GARIS-II, Beam separation, Fusion-evaporation reaction, Beam stopper

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