Department of Nuclear Physics
Research School of Physics and Engineering


Conversion Coefficient Calculator based on commonly used data tables
Reference:
T. Kibédi, T.W. Burrows, M.B. Trzhaskovskaya, P.M. Davidson, C.W. Nestor, Jr. 'Evaluation of theoretical conversion coefficients using BrIcc' Nucl. Instr. and Meth. A 589 (2008) 202229, doi:10.1016/j.nima.2008.02.051 Program parameters:
Z (Atomic number or symbol)
Enter a valid chemical symbol between Z=5 (Boron) to Z=110 (Darmstadtium).
Alternatively the program accepts an integer atomic number between 5 and 110.
γenergy (in keV)
Enter a γray energy between 1 keV and 6000 keV (for electron conversion) and
between 1100 keV and 8000 keV (for electron positron pair conversion).
BrIcc accepts numbers in integer, real, or scientific notation.
Uncertainty in energy
The program will accept symmetric (an integer number), asymmetric uncertainties (two signed integers, like +1227)
or the AP (approximate) operator. Specifying AP implies that the outputs are approximate.
Multipolarity
Enter a valid pure multipolarity of E1, E2, ...E5; M1, M2, M5 or E0.
Blank multipolarity field will list values for all multipolarities.
For mixed cases enter a pair of pure multipolarities, for example M1+E2 or M1,E2.
The first one assumes that the mixing ratio is known.
For pure E0 multipolarity the Ω(E0) electronic factor will be listed for K, L1,
L2shells and electronpositron pairs.
Please note the data tables cover different range of multipolarities.
δ
When calculating mixed multipolarities, a mixing ratio may be entered.
An empty mixing ratio field means that the mixing ratio is unknown and the output will reflect a mixing ratio
of unity (1) with an uncertainty that spans the pure coefficient values.
If no δ is given the program assumes the following values: δ=1.0 for E2/M1 and for E3/M2; δ=0.1 for all other cases.
Uncertainty in mixing ratio
The program will accept symmetric (an integer number), asymmetric uncertainties (two signed integers,
like +1227) or limit operators (AP, LE, LT, GT, GE). Specifying the approximate (AP) operator
implies that the output values are approximate.
For example entering 2.79 in the δ field and +1227 into the uncertanty field will be interpreted as
asymmetric uncertainties of +0.12 and 0.27.
Show Subshells
If this option is selected the program will list all subshell conversion coefficients.
Data Set
Select one of the four data sets (BrIccFO, BrIccNH, HsIcc, RpIcc)
from the drop down list, or select "Compare All" for a comparison of the different data sets.
"Compare All" gives a sidebyside comparison when a pure or mixed multipolarity is given,
otherwise it will output a sequence of tables. In the sidebyside output, error messages may
be ambiguous as they may refer to any of the datasets.
Tabulated output:
The Conversion Coefficient Calculator evaluates the nuclear transitions according to the rules of
the Evaluated Nuclear Structure Data File (ENSDF).
A detailed description is given in the
BrIcc Manual.
Numerical ICC(PCC) and Ω(E0) values for all shells (subshells or their ratios) are given
in a tabular form including the uncertainties.
Conversion electron energies are also given where appropriate, labelled as 'E(ce)'.
For major shells (L, M, N, etc.) 'E(ce)' is only given if the multipolarity is
known and was calculated as the average electron energy for that shell.
The symmetric uncertainty on ICC(PCC) is deduced from the following contributions:
Conversion Coefficient Grapher based on the BrIccFO data table
Program summary:
The Conversion Coefficient Grapher generates XY charts of ICC or Ω(E0) values for user
selectable atomic numbers, multipolarities, shells or ratios of particular atomic shells.
The Xaxis is always the transition energy and is equal to the full range of the BrIccFO tables.
The Yvalues are calculated according to parameters entered or selected.
Input parameters will be interpreted according to the rules summarized in the table below:
NOTE: It could take up to 30 seconds to generate the data for a graph!
Grapher program parameters:
Z (Atomic number or symbol)
Enter a valid chemical symbol between Z=5 (Boron) to Z=110 (Darmstadtium).
Alternatively the program accepts an integer atomic number between 5 and 110.
Multipolarity
Enter a valid pure multipolarity of E1, E2, ...E5; M1, M2, M5 or E0.
Blank multipolarity field will list values for all multipolarities.
For mixed cases enter a pair of pure multipolarities, for example M1+E2 or M1,E2.
The first one assumes that the mixing ratio is known.
For pure E0 multipolarity the Ω(E0) electronic factor will be listed for K, L1,
L2shells and electronpositron pairs.
Please note the data tables cover different range of multipolarities.
δ
When calculating mixed multipolarities, a mixing ratio may be entered.
An empty mixing ratio field means that the mixing ratio is unknown and the output will reflect a mixing ratio
of unity (1) with an uncertainty that spans the pure coefficient values.
If no δ is given the program assumes the following values: δ=1.0 for E2/M1 and for E3/M2; δ=0.1 for all other cases.
Shell, Shell1 & Shell2
Select one of the following from the list(s):
Show Subshells
If this option is selected the program will graph all subshell conversion coefficients.

Page last updated: 20 December 2011 Please direct all enquiries to: bricc@anu.edu.au Page authorised by: Head of department The Australian National University — CRICOS Provider Number 00120C 