Transport efficiency of JAERI recoil mass separator

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Abstract

Solid angles and transport efficiencies of the JAERI recoil mass separator were measured by using three procedures, that is, by using (1) α-particles from an241Am source, (2) elastic recoils of197Au produced in the bombardments of28Si beams on197Au targets and (3) evaporation residues produced in the fusion reaction of30Si+141Pr. The solid angles of 11 and 21 msr were obtained for the focus conditions of the mass dispersion (x|δm) = -1.1 and 0 cm/% respectively. The measured transport efficiency was compared with the ion-optical calculation of GIOS and a good agreement between the calculation and the present data was obtained. The charge state distributions of low-energy heavy recoils167Ta and197Au were also measured and compared with the various calculations. It was found that the empirical formula by Shima et al. well reproduced the present data.

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Kuzumaki, T., Ikezoe, H., Mitsuoka, S., Ikuta, T., Hamada, S., Nagame, Y., … Hashimoto, O. (1999). Transport efficiency of JAERI recoil mass separator. Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 437(1), 107–113. https://doi.org/10.1016/S0168-9002(99)00650-6

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