[18p-D62-1~17] CS.1 Code-sharing Session of 2.3 & 7.4

5:00 PM - 5:15 PM JST(8:00 AM - 8:15 AM UTC)

[18p-D62-13] Suppression of interfering isobaric ³⁶S in ³⁶Cl AMS at the ion source

〇Kimikazu Sasa^1,2, Masumi Matsumura¹, Tetsuro Yoshida¹, Tsutomu Takahashi¹ (1.UTTAC, Univ. Tsukuba, 2.Pure Appl. Sci., Univ. Tsukuba)

Keywords:

Accelerator Mass Spectrometry,Cl-36,Cs sputtering negative ion source

³⁶Cl is one of the most difficult radionuclides to measure due to contamination with the interfering isobaric ³⁶S. To separate and discriminate the ³⁶S, a method to reduce the ³⁶S contained in the beam itself from the Cs sputtering negative ion source and a method to separate and discriminate the spectrum of ³⁶S incident on the detector were studied. We attempted to suppress the contamination of ³⁶S by covering the surface of the Al wheel disk with a 0.50 mm thick Ta plate. As the result, the contribution of ³⁶S was reduced by about a factor of 50. In this presentation, we will report on the progress of AMS detection techniques for ³⁶Cl with the 6 MV tandem accelerator.