AMS of 41Ca Using the CaF3 Negative Ion

Abstract

High-intensity ion sources are now capable of producing negative molecular ion beams of Ca of >2μA (Middleton et al , 1989). This and the advanced status of 41 Ca AMS at several laboratories (Pennsylvania, Argonne National Laboratory, Rochester, Munich, Weizmann Institute) have revived interest in 41 Ca (T 1/2 = 1.0×10 5 yr (Mabuchi et al , 1974)) as a possible dating tool (Yamaguchi, 1963; Raisbeck & Yiou, 1979; Kubik et al , 1986).