The Brazilian Bragg curve detector built for AMS studies

A Bra,og curve detector (BCD) has been designed and built to be used for AM S purposes. Its design is described and its performance, obtained in tests at the Australian National University (ANU), is reported. At a Cl-36 energy of 154 MeV, the energy resolution was found to be 0.38%, and the charge re solution 1.3%. The Cl-36 and S-36 are completely discriminated. Good separa tion was also achieved at 64 MeV, and a measurement at this energy of the C l-36/Cl ratio of a sample measured previously at 154 MeV with the standard ANU ionization detector agreed well with the earlier value. This very simpl e detector has been shown to be suitable for use in AMS programs. (C) 2000 Elsevier Science B.V. All rights reserved.