The K-fluorescence yield of Te and the total and K-shell conversion coefficients of the 35.48 keV transition in 125I decay

Measurement of the intensity ratio of Auger and conversion electrons for the electron capture decay of125I

“…For high Z elements, where ω k approaches 1, the determination of the K Auger yield is thus an accurate way of determining the value of ω K . Besides the aforementioned fluorescence-yield measurements based on results from stable Te isotopes, there are earlier measurements based on coincidences between γ and X-rays for the case of the decay of 125 I (Karttunen et al, 1969), which gave a value of the fluorescence rate of 85.9 ± 2.2%. It worth noting that the measurement described here, based exclusively on the measurement of electron intensities, agrees with the measurement of Karttunen et al (1969), which relies solely on X-and γ-ray intensities.…”

Conversion Probability of the 35 keV Transition in 125Te

“…[l] (K/L/M= 80 & 5 / l 1 =2/1.7 =0.4), or the total conversion coefficient, obtainable from ref. [3] (cct,,=13.65 t0.55). The latter method was used, giving the better accuracy In fact the present measurement of conversion probability can be combined with the results of ref.…”

“…The latter method was used, giving the better accuracy In fact the present measurement of conversion probability can be combined with the results of ref. [3] to improve the accuracy of relative conversion intensities from ref. It might be expected for a 1-forbidden M1-transition that dynamic nuclear structure dependent contributions could affect the internal conversion process.…”

“…The advantage is that, for deriving the K-conversion probability, no knoNledge of detector efficiencies or fluorescent yield is required. When our measurement was completed a measurement of the K-conversion coefficient for the 35 keV transition was reported by Karttunen et al [3], where two Ge(Li) X-ray detectors with well known efficiency and good resolution were used.…”

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

“…This agreement indicates that the PV model describes the dominant part of the 1/2 + and 3/2 + state wavefunctions reasonably well. As a consequence of the small M 1 strength, the magnitude of the calculated λ = +5.6 is about five times larger than 6.68 (14) 1990Iw04 [34] 7.01 6.73 6.55 (13) 1992ScZZ [35] αT ot 13.65 (28) 1969Ka08 [36] 13.26 13.86 14.25(64) 1979CoZG [30] αK /(1 + αT ot) 0.80 (5) 1952Bo16 [37] 0.795 0.800 0.804(10) 1970Ma51 [38] αL/(1 + αT ot) 0.11 (2) 1952Bo16 [37] 0.109 0.107 αM /(1 + αT ot) 0.020 (4) 1952Bo16 [37] 0.022 0.021 K 12.01 (18)…”