Derivation of V function for LR 115 SSNTD from its partial sensitivity to 222Rn and its short-lived progeny

Solid-state nuclear track detectors (SSNTDs) have been widely applied for measurements of environmental concentrations of ²²²Rn and its progeny. The V function for an SSNTD is important for understanding the track development in the SSNTD as well as for real life applications. The partial sensitivity ρ_i of the LR 115 detector applied in the bare mode to ²²²Rn and its short-lived progeny is related to the equilibrium factor F through the proxy equilibrium factor F_p. On the other hand, ρ_i is also dependent on the removed active layer thickness during chemical etching, which is related to the V function for the LR 115 detector. In the present paper, the experimentally obtained ρ_i values of the LR 115 detector for different removed active layer thickness are used to derive the V function for the LR 115 SSNTD, which took the form of the Durrani-Green's function, i.e., V = 1 + (a₁ e{double-struck, italic}^{- a}₂ R + a₃ e{double-struck, italic}^{- a}₄ R) (1 - e{double-struck, italic}^{- a}₅ R), with the best-fitted constants as a₁ = 14.23; a₂ = 0.48; a₃ = 5.9 and a₄ = 0.077 (a₅ = 1). © 2006 Elsevier Ltd. All rights reserved.