[10p-N402-1~10] CS.1 Code-sharing Session of 2.3 & 7.5

[10p-N402-7] A Numerical Study on Dissociation Efficiency of Surface Stripper Proposed for a Downsized AMS System III

〇Akihiro Matsubara¹, Natsuko Fujita¹, Kenji Kimura¹ (1.JAEA-TONO)

Keywords:Accelerator Mass Spectrometry: AMS, Surface stripper, Molecular dissociation

The feasibility of a surface stripper proposed for downsized ¹⁴C-AMS systems is studied numerically. The model used in the series of studies is that ¹³CH molecules are disociated by collision with surface electrons in the case of the grazing incidence of the ¹³CH with the energy of tens of keV onto a single crystal surface. For evaluating the survival probability of the¹³CH in the present study, we assumed that the direction of the molecular axis is randomly distributed, and calculated the trajectory of its barycenter by using a potential force acting individually on the C and H atoms. The obtained survival probability falls to below 10⁻¹² at which the level is required for the practical use.