Energy Levels, Oscillator Strengths, and Transition Probabilities of Ni XIX and Cu XX


Energy levels, oscillator strengths, and transition probabilities, for the 1s2 2s2 2p6, 2p53l (l = 0, 1, 2), 2p54l (l = 0, 1, 2, 3) states in Ni XIX and Cu XX are calculated using COWAN code. The Correlation and relativistic effects are considered. The calculations are compared with other results in the literature. A good agreement is found. We also report on some unpublished energy values.

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Abdelaziz, W. , Khedr, M. , Ahmed, M. , Gaabour, L. and El-Shirbini, T. (2014) Energy Levels, Oscillator Strengths, and Transition Probabilities of Ni XIX and Cu XX. Optics and Photonics Journal, 4, 54-89. doi: 10.4236/opj.2014.43008.

Conflicts of Interest

The authors declare no conflicts of interest.


[1] Matthews, D.L. et al. (1985) Demonstration of a Soft X-Ray Amplifier. Physical Review Letters, 54, 110-113.
[2] Nilsen J., (1992) Journal of Quantitative Spectroscopy and Radiative Transfer. Journal of Quantitative Spectroscopy and Radiative Transfer, 47, 171-177.
[3] Sukewer, S., et al. (1985) Amplification of Stimulated Soft X-Ray Emission in a Confined Plasma Column. Physical Review Letters, 55, 1753-1756.
[4] Christiansen, J., et al. (1974) MEDUSA a One-Dimensional Laser Fusion Code. Computer Physics Communications, 7, 271-287.
[5] Zimmermann, G.B., et al. (1975) Numerical Simulation of Laser Initiated Fusion. Comments on Plasma Physics and Controlled Fusion, 11, 51.
[6] King, R.E., et al. (2001) Saturated X-Ray Lasers at 196 and 73 A Pumped by a Picosecond Traveling-Wave Excitation. Physical Review A, 64, 053810.
[7] Rocca, J.J., et al. (1994) Demonstration of a Discharge Pumped Table-Top Soft-X-Ray Laser. Physical Review Letters, 73, 2192.
[8] Feldhaus, J, et al. (1999) The VUV FEL Project at DESY: Plans for Improving the Photon Beam Characteristics by Feedback and Seeding. Institute of Physics Conference Series, 159, 553-556.
[9] Lemoff, B.E., et al. (1995) Demonstration of a 10-Hz Femtosecond-Pulse-Driven XUV Laser at 41.8 nm in Xe IX. Physical Review Letters, 74, 1574-1577.
[10] Cowan, R.D. (1981) The Theory of Atomic Structure and Spectra. University of California Press, Berkeley.
[11] Hartree, D.R. and Salpeter, E.E. (1957) Quantum Mechanics of One- and Two-electron Atoms. Springer-Verlage, Berlin, New York.
[12] Sobelman, I. (1979) Atomic Spectra and Radiative Transitions. Springer, Berlin.
[13] NIST Atomic Spectra Data Base Line Data (Energy Ordered), 2006.

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