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The microscopic eikonal phase shifts with its first and second corrections for pi nucleus collision are calculated by using the expression previously derived for the local Kisslinger potential. A physical description to different forms of…

Nuclear Theory · Physics 2022-03-15 N. A. Elmahdy , A. Y. Ellithi , A. SH. Ghazal , Z. Metawei , M. Y. M. Hassan

We propose a semi-empirical formula for the cross section of ionization by electron impact. The formula involves adjustable parameters which are determined by comparison with measured or numerically calculated cross sections. In the latter…

Atomic Physics · Physics 2024-04-09 Djamel Benredjem , Jean-Christophe Pain

This note presents a combination of published and preliminary electroweak results from the four LEP collaborations ALEPH, DELPHI, L3 and OPAL based on electron-positron collision data taken at centre-of-mass energies above the Z-pole, $130…

A new measurement of the p-d differential cross section at Ep= 1 MeV has been performed. These new data and older data sets at energies below the deuteron breakup are compared to calculations using the two-nucleon Argonne v18 and the…

The first-principle prediction of nanocluster stable structure is often hampered by the existence of many isomer configurations with energies close to the ground state. This fact attaches additional importance to many-electron effects going…

Mesoscale and Nanoscale Physics · Physics 2018-10-04 N. L. Matsko , Yu. A. Uspenskii , E. V. Tikhonov , V. S. Baturin , S. V. Lepeshkin

An extensive set of fine structure levels and corresponding transition probabilities for allowed and forbidden transitions in Fe XVII is presented. A total of 490 bound energy levels of Fe XVII of total angular momenta 0 <= J <= 7 of even…

Astrophysics · Physics 2011-05-23 Sultana N. Nahar , Werner Eissner , Guo-Xin Chen , Anil K. Pradhan

Using the semiclassical perturbation method, electron-, proton-, and ionized helium-impact line widths and shifts for the nine Cr I spectral lines from the $4p^7P^0-4d^7D$ multiplet, have been calculated for a perturbers density of…

Astrophysics · Physics 2009-11-10 M. S. Dimitrijevic , T. Ryabchikova , L. C. Popovic , D. Shulyak , S. Khan

We discuss one-loop electroweak corrections to the decay width of toponium. We calculate the energy-level shifts by expanding around the solution of the Bethe-Salpeter equation in the instantaneous approximation, in analogy with the…

High Energy Physics - Phenomenology · Physics 2009-10-28 George Siopsis

Dielectronic recombination (DR) is a key atomic process which affects the spectroscopic diagnostic modelling of tungsten, most of whose ionization stages will be found somewhere in the ITER fusion reactor: in the edge, divertor, or core…

Atomic Physics · Physics 2016-04-25 S. P. Preval , N. R. Badnell , M. G. O'Mullane

In this study a comprehensive calculations of energies, hyperfine structure constants, Land\'e g$_J$ factors and isotope shifts have been performed for the lowest 71 states of Na-like Ar$^{7+}$, Kr$^{25+}$ and Xe$^{43+}$ ions. Radiative…

Atomic Physics · Physics 2025-01-22 Shikha Rathi , Lalita Sharma

Recent precise parity-violating electron scattering experiments on $^{48}$Ca (CREX) and $^{208}$Pb (PREX-II) provide a new insight on the formation of neutron skin in nuclei. Within the energy density functional (EDF) framework, we…

Nuclear Theory · Physics 2023-01-04 Esra Yüksel , Nils Paar

We calculate the extremal cross sectional areas and cyclotron masses for the Fermi-surface pockets in Dirac and Weyl topological semimetals. The calculation is carried out for the most general form of the electron energy bands in the…

Mesoscale and Nanoscale Physics · Physics 2021-05-25 G. P. Mikitik , Yu. V. Sharlai

We report calculations of energy levels, radiative rates, oscillator strengths and line strengths for transitions among the lowest 345 levels of Ti X. These include 146 levels of the $n \le$ 3 configurations and 86 of 3s$^2 4\ell$, 3s$^2…

Atomic Physics · Physics 2013-07-11 KM Aggarwal , FP Keenan

We studied the dynamic effects of an electromagnetic(EM) wave with circular polarization on a two-level damped atom. The results demonstrate interesting ac Stark split of energy levels of damped atom. The split levels have different…

Quantum Physics · Physics 2009-11-10 Z. Y. Zeng , G. J. Zeng , L. M. Kuang , L. D. Zhang

The spectral energy distribution (SED) of the TT Ari system, which is well known from published IUE and optical photometric observations, was modeled by a steady-state accretion \alpha-disc around a white dwarf. Parameters of the system…

Solar and Stellar Astrophysics · Physics 2015-05-20 K. V. Belyakov , V. F. Suleimanov , E. A. Nikolaeva , N. V. Borisov

In this work we present dipole scattering amplitudes, including the dependence on the impact-parameter, for a variety of nuclear targets of interest for the electron-ion colliders (EICs) being currently designed. These amplitudes are…

High Energy Physics - Phenomenology · Physics 2020-10-21 J. Cepila , J. G. Contreras , M. Matas

The radiation damage to a silicon photomultiplier (SiPM) set on a satellite orbit increases energy threshold for scintillator detectors. We confirmed that 1 krad of radiation increases the energy threshold by approximately a factor of 10,…

Instrumentation and Detectors · Physics 2024-01-29 Teruaki Morishita , Yasushi Fukazawa , Hiromitsu Takahashi , Taishu Kayanoki , Ryota Niwa , Masaki Hashizume

Kowalski & Saumon (2006) identified the missing absorption mechanism in the observed spectra of cool white dwarf stars as the Ly-alpha red wing formed by the collisions between atomic and molecular hydrogen and successfully explained entire…

Solar and Stellar Astrophysics · Physics 2015-05-20 R. D. Rohrmann , L. G. Althaus , S. O. Kepler

The five J$\Pi$ levels within a $np^2$ or $np^4$ ground state complex provide an excellent testing ground for the comparison of theoretical line ratios with astrophysically observed values, in addition to providing valuable electron…

Earth and Planetary Astrophysics · Physics 2012-04-02 B. M. McLaughlin , Teck-Ghee Lee , J. A. Ludlow , E. Landi , S. D. Loch , M. S. Pindzola , C. P. Ballance

In this paper, we use the Mappings photoionization code to explore the physical parameters that impact on the measurement of electron temperature and abundance in HII regions. In the previous paper we presented observations and measurements…

Astrophysics of Galaxies · Physics 2015-06-19 David C. Nicholls , Michael A. Dopita , Ralph S. Sutherland , Helmut Jerjen , Lisa J. Kewley , Hassan Basurah