Nuclear Data Sheets for A = 125

A modern Monte Carlo investigation of the TG‐43 dosimetry parameters for an 125I seed already having AAPM consensus data

“…Subsequently, a new data evaluation for the 125 I photon energy spectrum following nuclear disintegration was performed by Katakura in 2011. 23 Upon comparison of these more recent data to the prior evaluation by Katakura in 1999, 24 and with removal of the 3.77 keV photon from both spectra, the mean photon energy changed from 28.3644 to 28.3676 keV, respectively. Utilizing the 1999 and 2011 spectra in calculations oḟ d(1 cm, θ 0 ),ḋ(5 cm, θ 0 ), and s K , the dosimetric uncertainties were 0.03%, 0.01%, and 0.04%, respectively.…”

“…Four different photon energy spectra were used for the computations examined in the current study. Compared to the 2011 evaluation by Katakura, 23…”

Precise measurement of αK and αT for the 109.3-keV M4 transition in Nica1, Hardy2, Iacob3 et al. 2017Phys. Rev. C6040View full textAdd to dashboardCite

“…Note also that the measured value of α T 109 depends on a calculated value for α T 36 , which in turn depends on the measured E2/M 1 mixing ratio [25] for the 35.5-keV transition. If that mixing ratio were wrong, it could have an impact on our α T 109 result.…”

“…(5) to derive N K36 , the contribution of the 35.5-keV transition to the K x-rays: We need to calculate the K-shell ICC for the 35.5-keV transition, α K36 . This is a mixed M 1 and E2 transition with a measured mixing ratio of δ = 0.031(3) [25]. Our ICC calculations are made within the DiracFock framework with the option either to ignore the Kshell vacancy or to include it in the "frozen-orbital" approximation [29].…”

“…Our ICC calculations are made within the DiracFock framework with the option either to ignore the Kshell vacancy or to include it in the "frozen-orbital" approximation [29]. Taking the transition energy to be 35.4925(5) keV [25], we find that the two different calculations yield values of α K36 that differ by less than 1%: 11.61 (no vacancy) and 11.69 (vacancy included). So as not to prejudice our result for the 109.3-keV transition, we adopt the value 11.65(4), which encompasses both possibilities.…”