Semi-Empirical LET Descriptions of Heavy Ions Used in the European Component Irradiation Facilities

Abstract

Semi-empirical fitting based on classical Bohr theory has been applied to the experimental LET data in silicon of the RADEF heavy ion cocktail species. The parameterized LET descriptions to be used in the European Component Irradiation Facilities are introduced and compared with the commonly used estimations from SRIM-code. Also, a new user interface, ECIF Cocktail Calculator, based on this work, has been published under the RADEF webpages at http://www.jyu.fi/accelerator/radef/ECIFCalc.

Large energy-loss straggling of swift heavy ions in ultra-thin active silicon layers

“…The charge of a projectile in thin target (µg/cm 2 ) can be expressed by the equilibrium charge which depends on the projectile's velocity and atomic number z 1 . [25] However, charged particles are considered to lose all the electrons in the front layers (e.g., detector, degraders, metallization layers, etc.) before reaching the active silicon layer, if the projectile's velocity is above the threshold velocity needed for projectile acquiring target electrons, qv 0 /z 1/3 1 , where q is the initial charge of the projectile, and v 0 is the Bohr velocity (25 keV/u).…”