TheK-shell conversion coefficient of the 135.5 keVM4 transition in193m Pt decay

Abstract

The K conversion coefficient of the 135.5 keV M4 transition in 193 rapt has been determined by the XPG method. The result is eK = 135.2 + 10.5 and the value exhibits a deviation 3.4 % below the theoretical prediction of Hager and Seltzer. Similar deviations have been systematically observed in precision values of E3 and M4 conversion coefficients reported in the literature.

Internal conversion coefficients ofM4 transitions in125m, 127m, 129mTe decay

“…The normalized Te KX-ray spectrum thus obtained is also shown in Figure 2. Using this and the [8], (c) [1], (d) [9], (e) Present work, (f) [10] original spectrum and after applying efficiency correction, we obtained (IK~ + IKB)/I ~ =423.4-+ 15.0. Taking coK(Te)=0.875-+0.028 from the recent review article of Bambynek et al [6], the c~ K value for the 88.26keV transition turns out to be 484_+23.…”