Evaluation of theoretical conversion coefficients using BrIcc

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• 作者：T. Kibé ; di ; T.W. Burrows ; M.B. Trzhaskovskaya ; P.M. Davidson ; C.W. Nestor Jr.
• 关键词：Nuclear structure ; Electromagnetic transitions ; Internal conversion coefficients ; Internal pair production ; l461"">le=""text-decoration ; none ; color ; black"" href=""/science?_ob=MathURL&_method=retrieve&_udi=B6TJM-4S0201W-2&_mathId=mml461&_
• 刊名：Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
• 出版年：2008
• 出版时间：1 May 2008
• 年：2008
• 卷：589
• 期：2
• 页码：202-229
• 全文大小：1085 K

文摘

A new internal conversion coefficient database, BrIcc has been developed which integrates a number of tabulations on internal conversion electron (ICC) and electron–positron pair conversion coefficients (IPC), as well as l458"">le=""text-decoration:none; color:black"" href=""/science?_ob=MathURL&_method=retrieve&_udi=B6TJM-4S0201W-2&_mathId=mml458&_user=1067359&_cdi=5314&_rdoc=10&_acct=C000050221&_version=1&_userid=10&md5=1cbc0fded63d754ead15b8ec4956a6c6"" title=""Click to view the MathML source"" alt=""Click to view the MathML source"">Ω(E0) electronic factors. A critical review of general formulae and procedures to evaluate theoretical ICC and IPC values are presented, including the treatment of uncertainties in transition energy and mixing ratio in accordance with the Evaluated Nuclear Structure Data File. The default ICC table, based on the Dirac–Fock calculations using the so called “Frozen Orbital” approximation, takes into account the effect of atomic vacancies created in the conversion process. The table has been calculated for all atomic shells and to cover transition energies of 1–6000 keV and atomic numbers of l459"">le=""text-decoration:none; color:black"" href=""/science?_ob=MathURL&_method=retrieve&_udi=B6TJM-4S0201W-2&_mathId=mml459&_user=1067359&_cdi=5314&_rdoc=10&_acct=C000050221&_version=1&_userid=10&md5=b692a0b17a316287c8bf3ee5803801fd"" title=""Click to view the MathML source"" alt=""Click to view the MathML source"">Z=5–110. The software tools presented here are well suited for basic nuclear structure research and for a range of applications.