Transport efficiency of JAERI recoil mass separator

  • Kuzumaki T
  • Ikezoe H
  • Mitsuoka S
 et al. 
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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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  • T. Kuzumaki

  • H. Ikezoe

  • S. Mitsuoka

  • T. Ikuta

  • S. Hamada

  • Y. Nagame

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