Calculation of atomic energy level values

Title of program: LEVEL Catalogue Id: AAKD_v1_0 Nature of problem An atomic energy level array consists of two sets of energy levels of different parity and transitions between them (we exclude transitions within sets). There are wide variations in the accuracies of the wave number values of observed classified transitions, and usually many more observed transitions than energy levels. The problem is to determine the best values for the levels and their uncertainties. The uncertainties are very important because these are used to determine the accuracies of wa ... Versions of this program held in the CPC repository in Mendeley Data AAKD_v1_0; LEVEL; 10.1016/0010-4655(72)90048-3 This program has been imported from the CPC Program Library held at Queen's University Belfast (1969-2018)