Tests of fundamental theories with heavy ions at low-energy regime

Abstract

The current status of theoretical investigations of spectroscopic properties and fundamental interactions in highly charged ions is reviewed. Laying special attention on tests of quantum electrodynamics at strong fields recent progress in calculations of energy levels, hyperfine splitting and g factor values is reported. The parity nonconservation effect on the laser-induced 2 3 S 1 − 2 1 S 0 transition in heavy He-like ions is studied, which could serve as test scenario for the Standard Model in low-energy atomic physics. The Coulomb glory effect in collisions of antiprotons with heavy ions is considered. It is emphasized that observation of this effect in collisions of antiprotons with bare nuclei would exhibit the screening properties of the vacuum polarization potential. A new approach to the description of dynamic atomic processes in low-energy heavy-ion collisions is presented. As a first application of this approach, the charge transfer probabilities for the U 91+ (1s) -U 92+ collision are evaluated.

QED calculation of electron-electron correlation effects in heliumlike ions

“…Therefore, in the Furry picture the electron-nucleus interaction is taken into account to all orders in αZ from the very beginning. The interaction with the quantized electromagnetic field and the interelectronic interaction are considered by the perturbation theory in the parameters α and 1/Z, respectively [58,[60][61][62][63][64]. We note that for very heavy ions the parameters α and 1/Z become comparable in magnitude, therefore, all the contributions can be classified by the powers of α.…”

Model operator approach to the Lamb shift calculations in relativistic many-electron atoms

“…In many cases the precision of these calculations has reached a level that requires evaluations of quantum electrodynamics (QED) effects. To date, the rigorous calculations of the QED effects in middle-and high-Z systems are fully restricted to the 1/Z perturbation theory (see, e.g., [15][16][17][18][19] and references therein). The perturbation theory methods have been also extended to many-electron ions and atoms employing an effective screening potential instead of the Coulomb one [20][21][22][23][24][25][26][27].…”

Antibiofilm effect of mono‐rhamnolipids and di‐rhamnolipids on carbon steel submitted to oil produced water

“…1,2,8 Recent studies have shown that metal biocorrosion is caused even by enzymes peroxidases and catalases, produced by microorganisms exposed to oxygen. 6 According to some studies, the protection of metallic materials against the action of corrosive agents can be made by chemical substances as surfactants, for example, alkylpolyglucoside (APG), that can inhibit the corrosion of 907 carbon steel, and didodecylbenzyltriethylammonium chloride that have a good effect against corrosion of the carbon steel (apud 3 ).…”

“…2,4,5 Studies have proven that the corrosion process occurs by the action of peroxidases and catalases, which are common enzymes produced by microorganisms exposed to oxygen. 6 Cases of crude oil leakage due to internal pipeline corrosion, generally caused by microbial action, are well reported worldwide. In addition to metal corrosion in pipelines and storage tanks, microbial action in the oil reservoir leads to fuel contamination, turbidity changes, and acidification of petroleum products.…”