# Accession Number:

## ADA043091

# Title:

## X ALPHA Calculation of Transition Energies in Multiply Ionized Atoms.

# Descriptive Note:

## Memorandum rept.,

# Corporate Author:

## BALLISTIC RESEARCH LABS ABERDEEN PROVING GROUND MD

# Personal Author(s):

# Report Date:

## 1977-07-01

# Pagination or Media Count:

## 14.0

# Abstract:

The X alpha method has been applied to the calculation of ionization energies in multiply ionized atoms. It is shown that the accuracy of calculations can be improved if appropriate different values of alpha are used for each configuration. Alternatively, one can use the Slater transition state, wherein a total energy difference is related to a difference in single-electron eigenvalues. By a series expansion, the value of alpha for an excited configuration can be related to its value for the ground-state configuration. The terms Delta alphadeleEdelalpha, thus introduced, exhibit a similar dependence on atomic number as the ground-state values of alpha. Results of sample calculations are reported and compared with experiment. Author

# Descriptors:

# Subject Categories:

- Nuclear Physics and Elementary Particle Physics