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Calculation of Atomic Data and Gain Coefficient for XUV &soft X-Ray Laser Emission from Ge XXIII

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Optics and Photonics Journal 2014年第9期4卷 246-269页

作者： wessameldin s. abdelaziz National Institute of Laser Enhanced sciences Cairo University Giza Egypt

Energy levels, transition probabilities, oscillator strengths, and collision strengths have been calculated for transitions in Ne-like Ge. The data refer to a 241 fine-structure levels belonging to the configurations 1s2 2s2 2p5nl, 1s2 2s1 2p6nl (n = 3, 4, 5, 6;l = s, p, d, f, g and h), which have been calculated by the fully relativistic flexible atomic code (FAC). These data are used in the determination of the reduced population for the 241 fine structure levels and gain coefficients over a wide range of electron densities (from 2 × 10+20 to 4 × 10+22 cm-3) and at various electron plasma temperatures (650, 850, 1050, 1250, 1450, 1650, 1850) eV by using the MATLAB R2013a Computer program for solving simultaneous coupled rate equations. The reduced population for the 241 fine structure levels the gain coefficients for those transitions with positive population inversion factor are determined and plotted against the electron density.

关键词： Energy Levels Transition Probabilities Oscillator strengths Collision strengths

XUV and soft X-Ray Laser Radiation from Ni-Like Au

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Optics and Photonics Journal 2011年第3期1卷 110-115页

作者： wessameldin s. abdelaziz Hamed Mahmoud Hamed Ibrahim 不详

Atomic structure data and effective collision strengths from literature for 1s2 2s2 2p6 3s2 3p63d10 and 34 fine-structure levels contained in the configurations 1s2 2s2 2p6 3s2 3p63d9 4l (l = s, p, d) for the nickel-like Au ion are used in the determination of the reduced population for these levels over a wide range of electron densities and at various electron plasma temperatures. The gain coefficient for those transitions with positive population inversion factor are determined and plotted against the electron density.

关键词： Atomic structure Data Effective Collision strengths Reduced Population Ni-Like Au

soft X-Ray Laser Gain from Neon like Gallium and Germanium

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Journal of Modern Physics 2016年第9期7卷 928-935页

作者： Mohammad Z. Mansour wessameldin s. abdelaziz Tharwat M. El sherbini National Institute of Laser Enhanced sciences Cairo University Giza Egypt Laboratory of Lasers and New Materials Faculty of Science Cairo University Giza Egypt

Gain coefficients are calculated for neon-like gallium and germanium ions. shorter wavelengths are calculated and predicted to be emitted. The gain coefficients are calculated among 457 energy levels of the neon-like ions. Collisional excitations were calculated through the distorted wave approximations through five electron temperatures Tsub>esub> = 300, 500, 700, 1000 and 1500 eV.

关键词： Gain Coefficients X-Ray Lasers Collisional Radiative Model

Theoretical study of Laser Emission for C-Like (Ar XIII), (Ti XVII) and (Fe XXI)

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Open Journal of Applied sciences 2016年第4期6卷 217-233页

作者： wessameldin s. abdelaziz Th. M. El sherbeni Nahed H. Wahba National Institute of Laser Enhanced sciences Cairo University Giza Egypt Laser and New Materials Laboratory Physics Department Faculty of Science Cairo University Giza Egypt

Energy levels, transition probability and oscillator strengths have been calculated for the Ar XIII, Ti XVII and Fe XXI. The configurations included in the calculations are 2s2 2p2, 2s2 2p 3l (l = s, p & d) and 4l (l ... 详细信息

Energy levels, transition probability and oscillator strengths have been calculated for the Ar XIII, Ti XVII and Fe XXI. The configurations included in the calculations are 2ssup>2sup> 2psup>2sup>, 2ssup>2sup> 2p 3l (l = s, p & d) and 4l (l = s, p, d, & f) of C-like Ar XIII, Ti XVII & Fe XXI which has 69 fine structures by using the fully relativistic flexible atomic code (FAC) program. These data are used in the determination of the reduced population and gain coefficients over a wide range of electron densities from (10sup>+18sup> to 10sup>+23sup>) and at various plasmas temperatures. The results show that the transitions in Arsup>18+sup>, Tisup>22+sup>, and Fesup>26+sup> ions are the most promising laser emission lines in the XUV and soft X-ray spectral regions.

关键词： XUV soft X-Ray Laser Radiation Population Inversion Gain Coefficient

Gain Coefficient Calculation for short Wave Laser Emission from sodium like Co

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Optics and Photonics Journal 2013年第8期3卷 369-378页

作者： wessameldin s. abdelaziz Mai E. Ahmed Mohamed Atta Khedr Tharwat M. El-sherbini Environmental Affairs Agency Cairo Egypt Laboratory of Lasers and New Materials Cairo University Cairo Egypt National Institute of Laser Enhanced sciences Cairo University Cairo Egypt

Level structure, oscillator strengths, transition probabilities and radiative life times are evaluated for 1s2 2s2 2p63l, 4l, 5l (l = 0, 1, 2, 3, 4) states in sodium like Co16+. The calculations are carried out using COWAN code. The calculations made were compared with other results in literature where a good agreement is found. We also report on some unpublished energy values and oscillator strengths. Our results are used in the calculation of reduced population of 21 fine structure levels over a wide rang of electron density values (1018 to 1020) at various electron plasma temperature. For those transitions with positive population inversion factor, the gain coefficients are evaluated and plotted against the electron density.

关键词： Level structure Oscillator strengths Transition Probabilities and Radiative Life Times sodium like Co16+

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

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Optics and Photonics Journal 2014年第3期4卷 54-89页

作者： wessameldin s. abdelaziz M. Atta Khedr Mai E. Ahmed Laila Gaabour Tharwat El-shirbini Environmental Affairs Agency Cairo Egypt Laboratory of Lasers and New Materials Cairo University Giza Egypt National Institute of Laser Enhanced sciences Cairo University Giza Egypt Physics Department Faculty of science King Abdul Aziz University Jeddah Saudi Arabia

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.

关键词： Energy Levels Oscillator strengths Transition Probabilities

The Gain Distribution According to the Theoretical structure and Decay Dynamics of sodium like Cu

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Optics and Photonics Journal 2012年第4期2卷 358-366页

作者： wessameldin s. abdelaziz Mai E. Ahmed Ali s. Khalil Mohammed Alshaik Ahmed Tharwat M. El-sherbini Al-Azhar University Gaza Palastine Environmental Affairs Agency Cairo Egypt Laboratory of Lasers and New Materials Cairo University National Institute of Laser Enhanced seiences Cairo University Tebin Institute for Metrological studies Helwan Egypt

Level structure, oscillator strengths, transition probabilities and radiative life times are evaluated for 1s2 2s2 2p63l, 4l, 5l (l = 0, 1, 2, 3, 4) states in sodium like Cu18+. The calculations are carried out using COWAN code. The calculations were made are compared with other results in literature where a good agreement is found, we also report on some unpublished energy values and oscillator strengths. Our results are used in the calculation of reduced population of 21 fine structure levels over a wide rang of electron density values (1018 to 1020) and at various electron plasma temperature. For those transitions with positive population inversion factor, the gain coefficients are evaluated and plotted against the electron density.

关键词： Level structure Oscillator strengths sodium like Cu

search for Laser Lines in sodium like Fe Plasmas

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Optics and Photonics Journal 2012年第4期2卷 314-317页

作者： wessameldin s. abdelaziz Mai E. Ahmed Tharwat M. El-sherbini Mohammed Alshaik Ahmed Ali s. Khalil Al-Azhar University in Palastine Ghaza Palastine Environmental Affairs Agency Cairo Egypt Laboratory of Lasers and New Materials Cairo University Giza Egypt National Institute of Laser Enhanced seiences Cairo University Giza Egypt 2Environmental Affairs Agency Cairo Egypt Tebin Institute for Metrological studies (TIMs) Cairo Egypt

Energy levels, transition probabilities and effective collision strength for 1s2 2s2 2p6 3l, 4l, 5l (l = 0, 1, 2, 3, 4) states of sodium like Fe are used in the determination of the reduced populations for 21 fine structure levels over a wide rang of electron density values (1018 to 1020 cm–3) and at against electron plasma temperatures. Gain coefficients are evaluated and plotted against the electron density.

关键词： XUV soft X-Ray Laser Emission Gain Coefficient