Evaluation of atomic shell data

Schönfeld, E.; Janßen, H.

doi:10.1016/s0168-9002(96)80044-1

Cited by 129 publications

(63 citation statements)

References 18 publications

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“…Concerning the empirical fit of Schönfeld & Janssen (1996), their values are on average closer to HFR than to AUTOSTRUCTURE and MCDF by, respectively, 2 ± 7%, 6 ± 6% and 5 ± 8%. We compare our theoretical KLM/KLL Auger channel ratios with experiment for singly-ionized ions with 11 ≤ Z ≤ 30 in Table 6.…”

Section: Uta Intensity Ratios Auger Channel Ratios and K-shell Fluormentioning

confidence: 89%

“…In Table 5, we compare between the calculated Kβ/Kα UTA intensity ratios for singly ionized ions with 15 ≤ Z ≤ 30 using our three independent methods (HFR, AUTOSTRUCTURE and MCDF-EAL) with measurements in solids (Hölzer et al 1997;Bé et al 1998;Öz 2006) and the empirical fit of Schönfeld & Janssen (1996). The solid-state measurements and the empirical fit values are scaled down by a factor of 0.9 for elements Summed over all the fine-structure lines.…”

Section: Uta Intensity Ratios Auger Channel Ratios and K-shell Fluormentioning

confidence: 99%

“…The number in parenthesis is the error affecting the last digits. (h) Empirical fit by Schönfeld & Janssen (1996). The number in parenthesis is the error affecting the last digits.…”

Section: Uta Intensity Ratios Auger Channel Ratios and K-shell Fluormentioning

confidence: 99%

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Atomic decay data for modeling K lines of iron peak and light odd-Zelements

Palmeri

Quinet

Mendoza

et al. 2012

A&A

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Complete data sets of level energies, transition wavelengths, A-values, radiative and Auger widths and fluorescence yields for K-vacancy levels of the F, Na, P, Cl, K, Sc, Ti, V, Cr, Mn, Co, Cu and Zn isonuclear sequences have been computed by a Hartree-Fock method that includes relativistic corrections as implemented in Cowan's atomic structure computer suite. The atomic parameters for more than 3 million fine-structure K lines have been determined. Ions with electron number N > 9 are treated for the first time, and detailed comparisons with available measurements and theoretical data for ions with N ≤ 9 are carried out in order to estimate reliable accuracy ratings.

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Section: Uta Intensity Ratios Auger Channel Ratios and K-shell Fluormentioning

confidence: 89%

Section: Uta Intensity Ratios Auger Channel Ratios and K-shell Fluormentioning

confidence: 99%

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Atomic decay data for modeling K lines of iron peak and light odd-Zelements

Palmeri

Quinet

Mendoza

et al. 2012

A&A

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“…For example the so called XPG method is based on the fact that each electron vacancy created in the K shell produces K X-Rays with a probability equal to the K-shell fluorescent yield ω K . The value of ω K depends only on the atomic number, and is known with an accuracy of ∼0.5% [10]; however, its value has changed quite significantly over the last decades. For many of the E2 transitions the total internal conversion coefficients, α T of have been deduced by combining the reduced E2 electromagnetic transition probability, B(E2), obtained from Coulomb excitation with the half-life of the level, T 1/2 , from lifetime measurements.…”

Section: High Precision Experimental Internal Conversion Coefficientsmentioning

confidence: 99%

Internal conversion coefficients - How good are they now?

Kibédi

Burrows

Trzhaskovskaya

et al. 2007

Nd2007

128

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Abstract. Internal conversion coefficients involving atomic electrons (ICC) and electron-positron pairs (IPC) are often required to determine transition multipolarities and total transition rates. A new internal conversion coefficient data base, BrIcc has been developed which integrates a number of tabulations on ICC and IPC, as well as Ω(E0) electronic factors. To decide which theoretical internal conversion coefficient table to use the accurately determined experimental α K , α L , α Total and α K /α L values were compared with the new Dirac-Fock calculations using extreme assumptions on the effect of the atomic vacancy. While the overall difference between experiment and theory is less than 1%, our analysis shows preference towards the so called Frozen Orbital approximation, which takes into account the effect of the atomic vacancy.

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“…Unfortunately, the ω K for iridium has never been directly measured, so in order to extract α K from this equation, we were forced to take the fluorescence yield from tables [9] based on a semi-empirical fit (as a function of Z ) to existing data, which are actually quite sparse for Z > 63 (see Ref. [10]).…”

Section: Introductionmentioning

confidence: 99%

Precise measurement ofK-shell fluorescence yield in iridium: An improved test of internal-conversion theory

et al. 2005

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We have measured the total intensity of K x rays relative to 129.4-keV γ rays from decay of the second excited state in 191 Ir. This (M1 + E2) transition was observed following the β decay of 15. 4-d 191 Os. Our measured ratio yields the result α K ω K = 2.044(11). When combined with a recent measurement of the same ratio for the 80.2-keV M4 transition from 193 Ir m , this result strongly confirms the need for the K-shell hole to be included in calculations of internal-conversion coefficients α K . Since the α K value calculated for the 191 Ir transition is virtually independent of the hole treatment, our result also yields a model-independent value for the iridium fluorescence yield, ω K = 0.954(9).

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Evaluation of atomic shell data

Cited by 129 publications

References 18 publications

Atomic decay data for modeling K lines of iron peak and light odd-Zelements

Atomic decay data for modeling K lines of iron peak and light odd-Zelements

Internal conversion coefficients - How good are they now?

Precise measurement ofK-shell fluorescence yield in iridium: An improved test of internal-conversion theory

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