Transport efficiency of JAERI recoil mass separator
Transport efficiency of JAERI recoil mass separator
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JAERI反冲质量分离器的输送效率
DOI：
10.1016/s0168-9002(99)00650-6
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发表时间：
1999
影响因子：
1.4
通讯作者：
O. Hashimoto
中科院分区：
文献类型：
--
作者：
T. Kuzumaki;H. Ikezoe;S. Mitsuoka;T. Ikuta;S. Hamada;Y. Nagame;I. Nishinaka;T. Ohtsuki;O. Hashimoto
用三种方法测量了JAERI反冲质量分离器的立体角和输运效率，即（1）241 Am源的α粒子，（2）28 Si束轰击197 Au靶产生的197 Au弹性反冲，（3）30 Si +141 Pr聚变反应产生的蒸发残渣。对于质量色散（x）的聚焦条件，获得了11和21 msr的立体角|δm）=−1.1和0 cm /%。将测量的输运效率与GIOS的离子光学计算进行了比较，计算结果与目前的数据吻合良好。测量了低能重反冲~（167）Ta和~（197）Au的电荷态分布，并与各种计算结果进行了比较。结果表明，Shima等人的经验公式与现有数据吻合较好。
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.