Penetration effects in the internal conversion process of the 204 keV transition in205Tl

Effective gyromagnetic ratios in odd Thallium isotopes

“…The importance of this process is connected with the penetration parameter 2 defined [1] as the ratio of the penetration electron matrix element to the gamma matrix element (see (3)). We have recently measured [2] the conversion coefficients of the 204keV transition from the first excited state 3/2 + to the ground state 1/2 + in 2~ [3] whose Ml-component is highly inhibited. The values of the penetration parameter, of the mixing ratio E2/M1 and of the reduced transition strength B(M1) have been deduced (for the latter the known lifetime [3] of the 3/2 + level has been taken into account).…”