Zobrazeno 1 - 10
of 308
pro vyhledávání: '"Gerhard Soff"'
Publikováno v:
The European Physical Journal D. 37:335-343
Two-photon transitions in the hydrogen atom are analytically evaluated within the nonrelativistic limit utilizing the Coulomb Green function method. The two-photon emission probability for the transition process 2s→2γ(E1)+1s serves as a test for t
Autor:
Andrey V. Volotka, Dmitry A. Glazov, Paul Indelicato, V. M. Shabaev, G. Plunien, I. I. Tupitsyn, Vladimir A. Yerokhin, Gerhard Soff
Publikováno v:
Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms. 235:55-60
The g factor of Li-like ions in the range Z = 6–92 is evaluated. The interelectronic-interaction corrections of order 1/ Z 2 and higher are taken into account by the configuration-interaction Dirac–Fock method. This result is combined with the 1/
Publikováno v:
Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms. 235:51-54
We present an accurate QED calculation of the interelectron interaction corrections to the energy of the (1s2p)1P1 and (1s2p)3P1 two-electron configurations for ions with nuclear charge 10 ⩽ Z ⩽ 92. When the fully relativistic treatment based on
Publikováno v:
Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms. 235:40-45
The second-order electron self-energy loop-after-loop correction is investigated for hydrogen-like ions in the region of low nuclear charge numbers Z. Both irreducible and reducible parts of this correction are evaluated for the 1s1/2-state within th
Publikováno v:
Journal of Physics G-Nuclear and Particle Physics 31(2005), S1151-S1154
8th International Conference on Strangeness in Quark Matter 2004, 15.-20.09.2004, Cape Town, South Africa
8th International Conference on Strangeness in Quark Matter 2004, 15.-20.09.2004, Cape Town, South Africa
The successful quasi-particle model is compared with recent lattice data of the coefficients in the Taylor series expansion of the excess pressure at finite temperature and baryon density. A chain of approximations, starting from QCD to arrive at the
Publikováno v:
International Journal of Modern Physics B. 18:3875-3886
The spectroscopical properties of hydrogen (H) and anti-hydrogen [Formula: see text] atoms in external electric and magnetic fields are discussed. This problem became important in connection with the recent experimental success in production of [Form
Publikováno v:
Neurocomputing. 61:169-191
The presynaptic free Ca2+ dynamics of neurons due to various stimulation protocols is investigated in a mathematical model. The model includes Ca2+ influx through voltage-dependent Ca2+ channels, Ca2+ buffering by endogenous and exogenous buffers as
Publikováno v:
Physics Letters A. 328:350-356
We investigate the correlated double-electron capture into the K shell of bare ions with emission of a single photon. In the energy region corresponding to the double-photoionization threshold, the total cross section of the process and the ratio of
Autor:
Gerhard Soff, I. A. Mikhailov, A. N. Moskalev, Andrei V. Nefiodov, A.I. Mikhailov, G. Plunien
Publikováno v:
Physics Letters A. 316:395-399
We investigate angular and energy distributions for double K-shell ionization of heliumlike ions caused by the absorption of a single photon. The differential cross sections of the process are calculated in the near-threshold domain incorporating con
Publikováno v:
Journal of Experimental and Theoretical Physics Letters. 78:110-114
We investigate the double K-shell ionization of heliumlike ions by a single photon. A fast convergence of QED perturbation theory with respect to the parameter 1/Z is demonstrated in the entire nonrelativistic domain for moderate nuclear charge numbe