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Table 1 Fitting parameters and corresponding PAL trapping modes describing positron annihilation in bulk mineral α-As4S4 and powdered β-As4S4

From: Probing Sub-atomistic Free-Volume Imperfections in Dry-Milled Nanoarsenicals with PAL Spectroscopy

Sample, fitting Fitting parameters PAL trapping modes
τ 1 I 1 τ 2 I 2 τ 3 I 3 τ b κ d τ 2 b τ 2 b
ns a.u. ns a.u. ns a.u. ns ns−1 ns a.u.
α-As4S4, ×3 0.193 0.666 0.346 0.308 1.873 0.026 0.224 0.72 0.12 1.54
α-As4S4, ×2 0.193 0.685 0.339 0.315 0.223 0.70 0.12 1.52
α-As4S4, ×2-gen. 0.194 0.656 0.456 0.343 0.241 1.02 0.22 1.89
β-CGP, ×3 0.207 0.745 0.432 0.222 2.337 0.033 0.235 0.58 0.20 1.84
β-CGP, ×2 0.206 0.793 0.439 0.207 0.232 0.53 0.21 1.89
β-CGP, ×2-gen. 0.208 0.734 0.656 0.266 0.254 0.87 0.40 2.58
β-FGP, ×2 0.193 0.607 0.344 0.393 0.233 0.90 0.11 1.48