Electron impact excitation of Kr XXVIII

• Published in: Atomic data and nuclear data tables Vol. 97; no. 3; pp. 225 - 344
• Main Authors: Aggarwal, K.M., Keenan, F.P., Lawson, K.D.
• Format: Journal Article
• Language: English
• Published: United States Elsevier Inc 01-05-2011
• Subjects: ANGULAR MOMENTUM; ATOMIC AND MOLECULAR PHYSICS; BEAMS; COLLISIONS; CONVERGENCE; ELECTRON BEAMS; ELECTRON COLLISIONS; ELEMENTS; ENERGY-LEVEL TRANSITIONS; EXCITATION; FLUIDS; FORBIDDEN TRANSITIONS; GASES; KRYPTON; LEPTON BEAMS; MATRICES; NONMETALS; NUCLEAR PHYSICS AND RADIATION PHYSICS; PARTIAL WAVES; PARTICLE BEAMS; R MATRIX; RARE GASES; TEMPERATURE RANGE; TEMPERATURE RANGE 0000-0013 K
• ISSN: 0092-640X; 1090-2090
• DOI: 10.1016/j.adt.2010.12.003

Collision strengths (
Ω) are calculated for all 6328 transitions among the lowest 113 levels belonging to the
2
s
2
2
p
5
,
2
s
2
p
6
,
2
s
2
2
p
4
3
ℓ
,
2
s
2
p
5
3
ℓ
, and
2
p
6
3
ℓ
configurations of fluorine-like krypton, Kr XXVIII, using the Dirac Atomic
R-matrix Code. All partial waves with angular momentum
J
⩽
40
are included, sufficient for the convergence of
Ω for forbidden transitions. For allowed transitions a top-up is employed to obtain converged values of
Ω up to an energy of 400
Ryd. Resonances in the thresholds region are resolved on a narrow energy mesh, and results for effective collision strengths (
ϒ) are obtained after averaging the values of
Ω over a Maxwellian distribution of electron velocities. Values of
ϒ are reported over a wide temperature range below
10
7.1
K
, and the accuracy of the results is assessed. In addition, effective collision strengths are listed for the temperature range
7.0
⩽
log
T
e
(
K
)
⩽
9.0
, obtained from non-resonant collision strengths generated with the FAC code.