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Accurate QED evaluations of the one- and two-photon interelectron interaction for low lying two- and three-electron configurations for ions with nuclear charge numbers $60\le Z \le 93$ are performed. The three-photon interaction is also…

Atomic Physics · Physics 2009-11-07 O. Yu. Andreev , L. Labzowsky , G. Plunien , G. Soff

The structure of $^{83}$As, $^{85}$As and $^{87}$As have been studied in fusion-fission reaction $^{238}$U+$^9$Be. Fission fragments were identified in mass and atomic number using the VAMOS++ spectrometer and the coincident $\gamma$-rays…

Application of the so called mxing-roughness-information depth (MRI)-model to the quantitative reconstruction of the in-depth distribution of composition is demonstrated by comparing SIMS and AES depth profiles. A GaAs/AlAs reference sample…

Materials Science · Physics 2007-05-23 S. Hofmann , A. Rar , D. W. Moon , K. Yoshihara

The potentiality of composition graded AlMgSi wires for optimized combination of electrical conductivity and torsion strength has been investigated. Composition graded wires were obtained by co-drawing commercially pure Al with an AlMgSi…

Materials Science · Physics 2020-08-24 Cui Yang , Nicolas Masquellier , Camille Gandiolle , Xavier Sauvage

Collision strengths for electron-impact of fine-structure level excitation within the ground term of Ne$^{+}$ and Ne$^{2+}$ are calculated using the Breit-Pauli, Intermediate Coupling Frame Transformation, and DARC $R$-matrix methods.…

Atomic Physics · Physics 2017-05-31 Qianxia Wang , S. D. Loch , Y. Li , M. S. Pindzola , R. Cumbee , P. Stancil , B. McLaughlin , C. P. Ballance

We report calculations of energy levels, radiative rates and electron impact excitation cross sections and rates for transitions in Be-like Ti XIX. The GRASP (General-purpose Relativistic Atomic Structure Package) is adopted for calculating…

Atomic Physics · Physics 2015-06-11 Km Aggarwal , Fp Keenan

Context. With the aid of stellar abundance analysis, it is possible to study the galactic formation and evolution. Magnesium is an important element to trace the alpha-element evolution in our Galaxy. For chemical abundance analysis, such…

Instrumentation and Methods for Astrophysics · Physics 2017-02-08 A. Pehlivan Rhodin , H. Hartman , H. Nilsson , P. Jonsson

We report a detailed study of features of electron-impact excitation (EIE) of Ca IV for the first time using the relativistic Breit-Pauli R-Matrix method with a large close coupling wavefunction expansion of 54 fine structure levels…

Solar and Stellar Astrophysics · Physics 2023-04-05 Sultana Nahar , Bilal Shafique

The structural, electronic, and optical properties of twelve multicomponent oxides with layered structure, RAMO$_4$, where R$^{3+}$=In or Sc; A$^{3+}$=Al or Ga; and M$^{2+}$=Ca, Cd, Mg, or Zn, are investigated using first-principles density…

Materials Science · Physics 2015-06-03 A. Murat , J. E. Medvedeva

A summary is given of data on the longitudinal rapidity and pseudorapidity distributions observed in $e^+e^-$, pp, pA and AA collisions at high energies. The remarkable simplicity and universality observed in the data and its relevance to…

Nuclear Experiment · Physics 2007-05-23 Wit Busza

Interfaces between metals based on AlO$_{x}$ represent the most popular basis for Josephson junctions or, more recently, also for junctions exhibiting substantial tunneling magneto-resistance. We have performed a computational study of…

Materials Science · Physics 2008-03-18 M. Dieskova , M. Konopka , P. Bokes

Phosphorus abundance is crucial for DNA-based extraterrestrial life in exoplanets. Atomic data for observed spectral lines of P-ions are needed for its accurate determination. We present the first calculations for collision strengths for…

Solar and Stellar Astrophysics · Physics 2018-06-13 Rahla Naghma , Sultana N. Nahar , Anil K. Pradhan

Macroscopic properties of materials stem from fundamental atomic-scale details, yet for insulators, resolving surface structures remains a challenge. The basal (0001) plane of ${\alpha}$-Al$_{2}$O$_{3}$ was imaged with noncontact atomic…

Energy levels, radiative rates and lifetimes are reported for the lowest 139 levels of three Ne-like ions, namely Cu~XX, Zn~XXI and Ga~XXII. These levels mostly belong to the 2s$^2$2p$^6$, 2s$^2$2p$^5$3$\ell$, 2s2p$^6$3$\ell$,…

Atomic Physics · Physics 2018-03-13 K M Aggarwal

We employ first principles total energy and phonon calculations to address the structure and stability of Al$_2$Fe. This structure, which is reported as stable in the assessed Al-Fe phase diagram, is distinguished by an unusually low…

Materials Science · Physics 2011-07-05 M. Mihalkovič , M. Widom

The magnetic dipole (M1) line strength between the fine-structure levels of the ground configurations in B-, F-, Al- and Cl-like ions are calculated for the four elements argon, iron, molybdenum and tungsten. Systematically enlarged…

Atomic Physics · Physics 2018-05-24 Moazzam Bilal , Andrey V Volotka , Randolf Beerwerth , Stephan Fritzsche

We have investigated energies and spectroscopic properties such as lifetimes, $g_J$ factors, and hyperfine structure constants of the neutral atoms P through Mc belonging to Group-15, singly ionized atoms S$^+$ through Lv$^+$ of Group-16…

Atomic Physics · Physics 2023-06-29 H. X. Liu , Y. M. Yu , B. B. Suo , Y. Liu , B. K. Sahoo

Energies of 5l_j (l= s, p, d, f, g) and 4f_j states in neutral Ag and Ag-like ions with nuclear charges Z = 48 - 100 are calculated using relativistic many-body perturbation theory. Reduced matrix elements, oscillator strengths, transition…

Atomic Physics · Physics 2009-11-10 U. I. Safronova , I. M. Savukov , M. S. Safronova , W. R. Johnson

In the present work, the atomic and the electronic structures of Au3N, AuN and AuN2 are investigated using first-principles density-functional theory (DFT). We studied cohesive energy vs. volume data for a wide range of possible structures…

Materials Science · Physics 2015-11-24 Mohammed S. H. Suleiman , Daniel P. Joubert

Energy levels, Land\'{e} $g$-factors and radiative lifetimes are reported for the lowest 182 levels of the 3d$^4$, 3d$^3$4s and 3d$^3$4p configurations of Fe~V, Co~VI and Ni~VII. Additionally, radiative rates ($A$-values) have been…

Atomic Physics · Physics 2017-03-08 K. M. Aggarwal , P. Bogdanovich , F. P. Keenan , R. Kisielius