Measurement of the radioisotope I-129 at the NSF-Arizona AMS laboratory

With the recent addition of a high-energy analysis beam line, the capabilit y to measure I-129 has been developed at the NSF-Arizona AMS Laboratory. Pr eliminary measurements have been made using the +4 and +5 charge states at 2.1 MV with a gas stripper. The current system employs a 90 degrees injecti on magnet (r = 0.36 m) following the ion source. Analysis components follow ing the accelerator include an electrostatic quadrupole doublet lens, a 15 degrees electrostatic deflector (r = 1.25 m), a 90 degrees analysis magnet (r = 1.27 m) and a 77 degrees spherical electrostatic analyzer (r = 2.0 m). Detection of I-129 is accomplished with a silicon surface barrier detector . Operation of this system with Various iodine samples will be discussed. ( C) 2000 Elsevier Science B.V. All rights reserved.