The problem of the Mössbauer isomer shift calibration for the119Sn resonance from rare-gas matrix isolation experiments

Data of new rare-gas matrix isolation experiments are presented and discussed in connection with the problem of the Mössbauer isomer shift calibration for¹¹⁹Sn. These experiments are: (i) A Mössbauer source experiment with^119mSn in solid xenon yielding the isomer shift of Sn⁺ with the atomic configuration 4d¹⁰5s²5p; (ii) Mössbauer absorption studies of isolated Sn(II) halide molecules (SnX₂, X-F, Cl, Br, I) in argon matrices; and (iii) Mössbauer absorption experiments with isolated¹²⁵Te atoms and molecules in argon and krypton matrices.This work was supported in part by a grant from the National Science Foundation and from the Bundesministerium für Forschung und Technologie