Energy levels, radiative transitions and Auger transitions of the core excited states for B-like ions

A pulsed discharge light source to study the six and seven times ionized xenon spectra in the 419–4642 Å region was used. A set of 40 transitions of Xe VII and 25 transitions of Xe VIII were classified for the first time. We revised the values for the previously known energy levels and extended the analysis for Xe VII to 10 new energy levels belonging to 5s6d, 5s7s and 5s7p, 4d95s25p even and odd configurations, respectively. Seven new energy levels of the core excited configuration 4d95s5d of Xe VIII are presented. For the prediction of the atomic parameters, energy levels, and transition, relativistic Hartree–Fock calculations were used.

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X-ray laser lines in nickel-like erbium

Canadian Journal of Physics ◽

10.1139/cjp-2015-0438 ◽

2016 ◽

Vol 94 (8) ◽

pp. 705-711

Author(s):

Wessameldin S. Abdelaziz

Keyword(s):

Ionization Potential ◽

Excited States ◽

Ground State ◽

Energy Levels ◽

Single Electron ◽

Electron Densities ◽

X Ray ◽

Electron Excited States

Energy levels of 249 excited levels in nickel-like erbium are calculated using the 3s23p63d10 as a ground state and the single electron excited states from n = 3 to n = 4, 5 orbitals, calculations have been performed using FAC code (Gu. Astrophys. J. 582, 1241 (2003). doi:10.1086/344745 ). The populations are calculated over electron densities from 1020 to 1023 cm−3 and electron temperatures 1/2, 3/4 of the ionization potential of Ni-like Er. The gain coefficients of the transitions are calculated.

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Study of Atomic Populations, Electromagnetically Induced Transparency, and Dispersive Signals in a λ-Type System Under Various Decoherence Effects

Ukrainian Journal of Physics ◽

10.15407/ujpe64.3.197 ◽

2019 ◽

Vol 64 (3) ◽

pp. 197

Author(s):

R. Hazra ◽

Md.M. Hossain

Keyword(s):

Excited States ◽

Electromagnetically Induced Transparency ◽

Energy Levels ◽

Type System ◽

Field Approximation ◽

Peak Height ◽

Probe Field ◽

Set Up ◽

Induced Transparency ◽

Atomic Populations

We have theoretically studied the atomic populations, electromagnetically induced transparency (EIT), and dispersion in a three-level Λ-type system. The density matrix equations are set up with regard for the relaxation of populations of the ground states, and the optical Bloch equations are solved analytically in the weak probe field approximation. Decoherence effects in the ground and excited states on the EIT line shape and dispersive signals are studied, and it is found that the EIT line width increases and the peak height decreases, as the decoherence rates increase in the ground and excited states. On the other hand, we have observed that the dispersive signals are steeper and of high contrast for the lower decoherence rates in the ground and excited states. We have also analyzed the variations of atomic populations of the energy levels at the pump Rabi frequency, as well as the decoherence rate in the ground state.

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TD-DFT calculations of the excited states of metalloporphyrins relevant to organic solar photovoltaic cells

Journal of Porphyrins and Phthalocyanines ◽

10.1142/s1088424614500230 ◽

2014 ◽

Vol 18 (06) ◽

pp. 475-492 ◽

Cited By ~ 2

Author(s):

Neha Agnihotri ◽

Ronald P. Steer

Keyword(s):

Dft Calculations ◽

Electronic State ◽

Excited States ◽

Photovoltaic Cells ◽

Oscillator Strengths ◽

Solar Photovoltaic ◽

Dft Methods ◽

Radiative Transitions ◽

Td Dft ◽

Triplet Excited States

The molecular orbital energies and symmetries, electronic state energies and symmetries, and orbital compositions and oscillator strengths for one-photon radiative transitions up to an energy of 4 eV have been calculated by DFT and TD-DFT methods for 15 d0 and d10 metalloporphyrins. Data for both singlet and triplet excited states are reported and used to identify potential candidates for use as photon upconverters by homomolecular triplet–triplet annihilation.

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Quantum chaos and statistical properties of energy levels for atom in parallel electric and magnetic fields

Modern Physics Letters B ◽

10.1142/s0217984915502486 ◽

2015 ◽

Vol 29 (35n36) ◽

pp. 1550248

Author(s):

Hai-Feng Yang ◽

Yong-Gang Tan ◽

Zhong-Li Liu ◽

Hong-Zhi Fu

Keyword(s):

Magnetic Fields ◽

Quantum Chaos ◽

Chaotic Dynamics ◽

Nearest Neighbor ◽

Energy Levels ◽

Statistical Properties ◽

The Core ◽

Ideal System ◽

Electric And Magnetic Fields ◽

Diagonalization Method

In this paper, the statistical properties of energy levels are studied numerically for atom in parallel electric and magnetic fields, which is an ideal system to examine the contributions of external fields and ionic core to quantum chaos. The Stark maps of diamagnetic spectra and nearest neighbor spacing (NNS) distributions are obtained by diagonalization method incorporating core effect. We identify obvious level anti-crossing and large value of [Formula: see text] for barium, indicating that core effect has predominant contribution to chaotic dynamics in barium. To study the core effect in detail, we sweep the quantum defect artificially and find that larger core effect will undoubtedly induce stronger chaotic dynamics.

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