Re-interpretation of some experimental results of M1 penetration matrix elements in Tl203, Tl201 and Ta181

High-resolution conversion electron spectroscopy of the I125 electron-capture decay

“…Looking to future experimental evaluations of Auger yields from radioisotopes by this method, it appears that penetration effects are generally small for spherical nuclei in this mass region [8,49]. However, much larger penetration factors have been reported in some cases [60]. Because the measurement of penetration factors is so difficult, it is important to have a reliable estimate on whether they are significant or not.…”

The penetration parameter λ of the anomalousM1-conversion of the 482 keV transition in181Ta

“…spectrometer, use of i37Cs for calibration 0.0239 -+0.0010 (rel. intensities measured by Ge(Li)-detector) (6) calibrated Si(Li)-detector for 482 K and 482 7 0.0234-+ 0.0015 (7) ironfree orange spectrometer and Ge(Li)-detector, 0.0246 +_ 0.0018 use of c~K=0.154 for the 476 keV-line for calibration [14] [15] [16] [5] [l?] [12] this work Result of coincidence experiment [12] intense 482keV-line the weak 476keV-transition.…”

“…77(0), Ge(Li)-NaI(T1) system integr. 77(0), three Ge(Li) system 6 anomalous conversion is present. In 1961 Gerholm et al [4] reported anomalies in conversion electrongamma correlations and since then a series of investigations has been performed [5][6][7][8].…”

“…77(0), three Ge(Li) system 6 anomalous conversion is present. In 1961 Gerholm et al [4] reported anomalies in conversion electrongamma correlations and since then a series of investigations has been performed [5][6][7][8]. Absolute measurements of conversion electrongamma angular correlations always involve the problem of corrections for electron scattering in the source material, for possible attenuations by hyperfine interactions in the solid environments and for the effective solid angle of the electron spectrometer.…”