[S-CG54] Evolution and movement of the crustal surface and application of geo- and thermochronology

[SCG54-P07] Artificial alpha recoil tracks formation on muscovite surface and their annealing characteristics

Taiki Nakashima¹, Yuto Iinuma², Koichi Takamiya², AKihiko Yokoyama¹, Norihiro Yamada¹, *Noriko Hasebe¹ (1.Kanazawa University, 2.Kyoto University)

Keywords:alpha recoil track, annealing characteristics, muscovite

²³⁸U, ²³⁵U, and ²³²Th decay through emission of alpha particles to stable lead. Alpha Recoil Track (ART) is the damage created when daughter nuclides move back in response to alpha decay (Fleisher, 2003). Under the known decay constants of uranium and thorium, the age since the start of ART accumulation can be calculated by measuring the number of ARTs and uranium and thorium concentrations.
The purpose of this research is to establish a method of artificially forming ARTs on mineral surfaces using muscovite ART detectors to help understand ART behavior in various minerals. An experiment on the annealing behaviour of muscovite was also carried out.