  Recent experimental data are analyzed, concerning the half-lives of the
229mTh isomer in neutral atoms and various ions. Calculation is performed on
the united platform of interplay of traditional and subthreshold resonance
conversion. General agreement with experiment is obtained in the cases of Th I
and Th III, a prediction is made concerning half-life in Th IV. Most critical
is the case of Th II, where experimental data can be explained by interplay of
various factors. A new physics is proposed, based on dependence of the nuclear
lifetime on the ambient conditions, such as atmospheric pressure. This must be
taken into account in future experiments and their interpretation.
