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.
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