Prerequisites for studying relativistic quantum dynamics in experiments at the GSI and FAIR facilities

在 GSI 和 FAIR 设施的实验中研究相对论量子动力学的先决条件

• 批准号: 323411814
• 负责人: Dr. Alexandre Gumberidze
• 金额: --
• 依托单位: Department of Statistical Physics
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2017
• 资助国家: 德国
• 起止时间: 2016-12-31 至 2019-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/323411814?language=en
• 关键词: Prerequisites; studying; relativistic; quantum; dynamics

The present proposal aims at implementing a strong collaboration working on the theory of quantum dynamics of electrons (including electron-positron pair creation) and radiation processes in presence of strong electromagnetic fields. These studies are needed for experiments that are planned to be performed at the GSI and FAIR facilities. The teams will work on development of relativistic methods for calculations of the electron-excitation, charge-transfer, and pair-creation processes in low-energy ion-atom collisions. The previously developed approach will be extended to the time-dependent density functional theory that will allow us to properly account for interelectronic-interaction effects and describe relativistic many-electron processes in (quasi) symmetric low-energy ion-atom collisions. The study of quasimolecular radiation spectra at low-energy heavy-ion collisions is of special interest. Indeed, the coherent superposition of the transition amplitudes with the photon emission in the incoming and outgoing part of the ion trajectories leads to an interference structure of radiation, which allows a detailed comparison between theory and experiment. The analysis of the intensity and shape of the spectra will be a powerful tool for studying various processes and searching for new physics in low-energy heavy ion-atom collisions at the supercritical regime. Thus, a technique for calculations of the quasimolecular radiation spectra at low-energy heavy-ion collision will be developed. With these extensions, the probabilities of various processes in low-energy heavy ion-atom collisions, that are planned to be investigated at the CRYRING (Darmstadt), will be calculated. Also the calculations of the charge-transfer, ionization, and pair-creation probabilities in ion-atom (-ion) collisions at the projectile energies near the Coulomb barrier will be performed including into consideration all occupied negative-energy states of the Dirac continuum. The teams will also work on the development of a relativistic technique for describing of highly charged ions exposed to strong laser fields. The role of non-dipole effects, the influence of the negative-energy Dirac continuum and spin-asymmetry effects in these processes will be investigated. A relativistic approach for describing the interaction of twisted electrons with various ionic and atomic systems will be also developed. Relativistic calculations of the radiative and dielectronic recombinations of the vortex electron beams with heavy highly charged ions will be performed. All the work will be done in close collaboration with the experimentalists from GSI/FAIR (part of the German team in this project), thus ensuring an optimal planning and preparation of the corresponding upcoming experiments to allow for addressing the most interesting physics phenomena in the realm of low-energy ion collisions.

本提案旨在实施强有力的合作，致力于电子量子动力学理论（包括电子-正电子对的产生）和强电磁场存在下的辐射过程。计划在GSI和FAIR设施进行的实验需要这些研究。这些小组将致力于发展相对论方法，用于计算低能离子-原子碰撞中的电子激发、电荷转移和电子对产生过程。以前开发的方法将扩展到含时密度泛函理论，这将使我们能够正确地考虑电子间相互作用的影响，并描述相对论多电子过程（准）对称低能离子-原子碰撞。低能重离子碰撞中准分子辐射谱的研究具有特殊的意义。事实上，相干叠加的过渡振幅与光子发射的离子轨迹的传入和传出的一部分，导致辐射的干涉结构，这使得理论和实验之间的详细比较。对谱线强度和形状的分析将是研究低能重离子-原子超临界碰撞中各种过程和寻找新物理的有力工具。因此，将发展一种计算低能重离子碰撞准分子辐射谱的技术。利用这些扩展，将计算计划在DSPRING（达姆施塔特）研究的低能重离子-原子碰撞中各种过程的几率。此外，电荷转移，电离，和对创建概率的计算离子-原子（离子）碰撞在库仑势垒附近的抛射体能量将包括考虑所有占据的负能态的狄拉克连续。研究小组还将致力于开发一种相对论技术，用于描述暴露在强激光场下的高电荷离子。非偶极效应的作用，负能狄拉克连续谱和自旋不对称效应在这些过程中的影响将被调查。一个相对论的方法来描述扭曲的电子与各种离子和原子系统的相互作用也将被开发。将进行涡旋电子束与重高电荷态离子的辐射复合和双电子复合的相对论计算。所有工作都将与GSI/FAIR的实验人员（该项目的德国团队的一部分）密切合作，从而确保相应的即将进行的实验的最佳规划和准备，以解决低能离子碰撞领域中最有趣的物理现象。

项目成果

Impact parameter sensitive study of inner-shell atomic processes in the experimental storage ring

实验存储环内壳原子过程冲击参数敏感研究

• DOI: 10.1016/j.nimb.2017.04.090
• 发表时间: 2017
• 期刊: Nuclear Instruments & Methods in Physics Research Section B-beam Interactions With Materials and Atoms
• 影响因子: 1.3
• 作者: A. Gumberidze

Atomic processes with twisted electrons

• DOI: 10.1088/1742-6596/1412/5/052013
• 发表时间: 2020-01
• 期刊: Journal of Physics: Conference Series
• 作者: V. Zaytsev;A. Surzhykov;V. Serbo;V. P. Kosheleva;M. E. Groshev;V. Yerokhin;V. Shabaev;T. Stöhlker

One-center calculations of the electron-positron pair creation in low-energy collisions of heavy bare nuclei

• DOI: 10.1140/epjd/e2018-90056-4
• 发表时间: 2014-12
• 期刊: The European Physical Journal D
• 作者: R. V. Popov;A. I. Bondarev;Y. Kozhedub;I. A. Maltsev;V. Shabaev;I. Tupitsyn;Xinwen Ma;G. Plunien;T. Stöhlker

How to Observe the Vacuum Decay in Low-Energy Heavy-Ion Collisions.

• DOI: 10.1103/physrevlett.123.113401
• 发表时间: 2019-03
• 期刊: Physical review letters
• 影响因子: 8.6
• 作者: I. A. Maltsev;V. Shabaev;R. V. Popov;Y. Kozhedub;G. Plunien;X. Ma;T. Stöhlker;D. Tumakov

How to access QED at a supercritical Coulomb field

• DOI: 10.1103/physrevd.102.076005
• 发表时间: 2020-08
• 期刊: Physical Review D
• 影响因子: 5
• 作者: R. V. Popov;V. Shabaev;D. Telnov;I. Tupitsyn;I. A. Maltsev;Y. Kozhedub;A. I. Bondarev;N. V. Kozin-N. V.-Kozin-2126411581;X. Ma;G. Plunien;T. Stöhlker;D. Tumakov;V. Zaytsev