Ground-state excitation of heavy highly-charged ions

被引：7

作者：

Gumberidze, A. ^{[1
]}

Thorn, D. B. ^{[2
,3
,4
]}

Fontes, C. J. ^{[5
]}

Najjari, B. ^{[6
]}

Zhang, H. L. ^{[5
]}

Surzhykov, A. ^{[7
]}

Voitkiv, A. ^{[8
]}

Fritzsche, S. ^{[7
,9
]}

Banas, D. ^{[10
]}

Beyer, H. ^{[1
,7
]}

Chen, W. ^{[1
]}

DuBois, R. D. ^{[11
]}

Geyer, S. ^{[1
,12
]}

Grisenti, R. E. ^{[1
,12
]}

Hagmann, S. ^{[1
,12
]}

Hegewald, M. ^{[1
,12
]}

Hess, S. ^{[1
,12
]}

Kozhuharov, C. ^{[1
]}

Maertin, R. ^{[7
]}

Petridis, N. ^{[1
]}

Reuschl, R. ^{[1
]}

Simon, A. ^{[13
]}

Spillmann, U. ^{[1
]}

Trassinelli, M. ^{[14
,15
]}

Trotsenko, S. ^{[7
]}

Weber, G. ^{[7
]}

Winters, D. F. A. ^{[1
]}

Winters, N. ^{[1
]}

Yu, D. ^{[16
]}

Sthoelker, T. ^{[1
,7
,9
]}

机构：

[1] GSI Helmholtzzentrum Schwerionenforsch, D-64291 Darmstadt, Germany

[2] GSI Helmholtzzentrum Schwerionenforsch, ExtreMe Matter Inst EMMI, D-64291 Darmstadt, Germany

[3] GSI Helmholtzzentrum Schwerionenforsch, Div Res, D-64291 Darmstadt, Germany

[4] Frankfurt Inst Adv Studies, D-60438 Frankfurt, Germany

[5] Los Alamos Natl Lab, Computat Phys Div, Los Alamos, NM 87545 USA

[6] Inst Pluridisciplinaire Hubert Curien, Grp RaMsEs, F-67037 Strasbourg, France

[7] Helmholtz Inst Jena, D-07743 Jena, Germany

[8] Univ Dusseldorf, Theoret Phys 1, D-40225 Dusseldorf, Germany

[9] Univ Jena, IOQ, D-07743 Jena, Germany

[10] Jan Kochanowski Univ, Inst Phys, PL-25406 Kielce, Poland

[11] Missouri Univ Sci & Technol, Rolla, MO USA

[12] Goethe Univ Frankfurt, Inst Kernphys, D-60486 Frankfurt, Germany

[13] Michigan State Univ, NSCL, E Lansing, MI 48223 USA

[14] CNRS, Inst NanoSci Paris, F-75005 Paris, France

[15] Univ Paris 06, Inst NanoSci Paris, Sorbonne Univ, F-75005 Paris, France

[16] Inst Modern Phys, Lanzhou 730000, Peoples R China

来源：

JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS | 2015年 / 48卷 / 14期

关键词：

highly-charged ions; x-rays; storage rings; relativistic collisions; excitation; Breit interaction; RADIATIVE ELECTRON-CAPTURE; CROSS-SECTIONS; DIELECTRONIC-RECOMBINATION; COLLISIONS; IMPACT; ATOMS; PROJECTILES; IONIZATION; TARGET; HE;

D O I：

10.1088/0953-4075/48/14/144006

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We have studied the excitation of H-like and He-like uranium (U91+ and U90+) in relativistic collisions with gaseous targets by observing the subsequent x-ray emission. The experiment was conducted at the ESR storage ring of the GSI accelerator facility in Darmstadt, Germany. The measurements were performed with a newly developed multi-phase target at different collision energies. This enabled us to explore the proton (nucleus) impact excitation as well as the electron impact excitation processes in the relativistic collisions. The large fine-structure splitting in uranium allowed us to unambiguously resolve excitation to different L-shell levels. Moreover, information about the population of different magnetic sublevels has been obtained via an angular differential study of the decay photons associated with the subsequent de-excitation process. The experimental results are compared with calculations performed within the relativistic framework including excitation mechanisms due to both protons (nucleus) and electrons.

引用

页数：5

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