40th Annual Meeting of the APS Division of Atomic, Molecular and Optical Physics
Volume 54, Number 7
Tuesday–Saturday, May 19–23, 2009;
Charlottesville, Virginia
Session K4: Atomic Spectroscopy
10:30 AM–12:30 PM,
Thursday, May 21, 2009
Clark Hall
Room: 108
Chair: Alex Godunov, Old Dominion University
Abstract ID: BAPS.2009.DAMOP.K4.7
Abstract: K4.00007 : Studies of the Coster-Kronig, Shake off probabilities and Gaussian curves of L X-Ray satellites spectra
11:42 AM–11:54 AM
Preview Abstract
Abstract
Author:
Surendra Poonia
(Research Scientist (Atomic and X-Ray Spectroscopy))
The X-ray satellite spectra arising due to
L$_{2}$M$_{x}$-M$_{x}$M$_{4,5}$,
L$_{3}$M$_{x}$-M$_{x}$M$_{4,5 }$and
L$_{3}$M$_{x}$-M$_{x}$N$_{4,5}$ (x
$\equiv $ 1-5) transition array, in elements with Z = 26 to 92,
have been
calculated, using available Hartree-Fock-Slater (HFS) data on
K-L$_{3}$M$_{x}$ and L$_{3}$-M$_{x}$M$_{4,5}$ Auger transition
energies. The
relative intensities of all the possible transitions have been
estimated by
considering cross-sections for the Auger transitions simultaneous
to a hole
creation and then distributing statistically the total cross
sections for
initial two hole states L$_{3}$M$_{x}$ amongst various allowed
transitions
from these initial states to M$_{x}$M$_{4,5}$ final states by
Coster-Kronig
(CK) and shake off processes. In both these processes, initial
single hole
creation is the prime phenomenon and electron bombardment has
been the
primary source of energy. Each transition has been assumed to
give rise to a
Gaussian line and the overall spectrum has been computed as the
sum of these
Gaussian curves. The calculated spectra have been compared with
the measured
satellite energies in L$\alpha _{1}$ L$\beta _{1}$ and L$\beta _{2}$
spectra. The one to one correspondence between the peaks in
calculated
spectra and the satellites in measured spectra has been
established on the
basis of the agreement between the separations in the peak
energies and
those in the measured satellite energies. Their intense peaks
have been
identified as the observed satellite lines. The peaks in the
theoretical
satellite spectra were identified as the experimentally reported
satellites
L$\alpha _{3}$, L$\alpha _{4}$, L$\alpha _{5}$, L$\alpha \prime $,
L$\alpha ^{ix}$,$^{ }$L$\alpha ^{x}$, L$\beta _{1}^{I}$, L$\beta
_{1}^{II}$, L$\beta _{1}^{III}$, L$\beta _{1}^{IV}$ L$\beta
_{2}^{I}$, L$\beta _{2}^{(b)}$, L$\beta _{2}^{II}$ and L$\beta
_{2}^{(c)}$ which lie on the high-energy side of the L$\alpha _{1}$,
L$\beta _{1}$, L$\beta _{2}$ dipole line.
To cite this abstract, use the following reference: http://meetings.aps.org/link/BAPS.2009.DAMOP.K4.7