Discrete conversion of gamma rays in Th-229 and in highly ionized Te-125(Q) ions

The complex of problems associated with the discrete conversion of gamma ra ys is considered. The analogue of the internal conversion coefficient is de termined for the case of discrete conversion, and specific computations are made. The calculated values of the half-life of the nuclear level E-gamma = 35.492 keV in Te-125(Q) ions (Q = 45-48) are in good agreement with the m easured quantities. Computations for the spectrum of optical photons accomp anying the de-excitation of the nuclear level E-gamma = 3.5 +/- 1 eV in Th- 229, carried out using the Dirac-Fock multiple configuration method, show t hat the highest-intensity spectral lines are situated in the region of 2.3- 2.4 eV, which is in accord with the experimental data. (C) 2001 MAIK "Nauka /Interperiodica".