Direct Measurements of the Ionization Potential Depression in a Dense Plasma

被引：273

作者：

Ciricosta, O. ^{[1
]}

Vinko, S. M. ^{[1
]}

Chung, H. -K. ^{[2
]}

Cho, B. -I. ^{[3
]}

Brown, C. R. D. ^{[4
]}

Burian, T. ^{[5
]}

Chalupsky, J. ^{[5
]}

Engelhorn, K. ^{[3
]}

Falcone, R. W. ^{[3
,6
]}

Graves, C. ^{[7
]}

Hajkova, V. ^{[5
]}

Higginbotham, A. ^{[1
]}

Juha, L. ^{[5
]}

Krzywinski, J. ^{[7
]}

Lee, H. J. ^{[7
]}

Messerschmidt, M. ^{[7
]}

Murphy, C. D. ^{[1
]}

Ping, Y. ^{[8
]}

Rackstraw, D. S. ^{[1
]}

Scherz, A. ^{[7
]}

Schlotter, W. ^{[7
]}

Toleikis, S. ^{[9
]}

Turner, J. J. ^{[7
]}

Vysin, L. ^{[5
]}

Wang, T. ^{[7
]}

Wu, B. ^{[7
]}

Zastrau, U. ^{[10
]}

Zhu, D. ^{[7
]}

Lee, R. W. ^{[7
]}

Heimann, P. ^{[3
]}

Nagler, B. ^{[7
]}

Wark, J. S. ^{[1
]}

机构：

[1] Univ Oxford, Dept Phys, Clarendon Lab, Oxford OX1 3PU, England

[2] IAEA, Atom & Mol Data Unit, Nucl Data Sect, A-1400 Vienna, Austria

[3] Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA

[4] AWE Aldermaston, Dept Plasma Phys, Reading, Berks, England

[5] ASCR, Inst Phys, Prague 18221 8, Czech Republic

[6] Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA

[7] SLAC Natl Accelerator Lab, Menlo Pk, CA 94025 USA

[8] Lawrence Livermore Natl Lab, Livermore, CA 94550 USA

[9] DESY, Deutsch Elekt Synchrotron, D-22603 Hamburg, Germany

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

来源：

PHYSICAL REVIEW LETTERS | 2012年 / 109卷 / 06期

基金：

英国工程与自然科学研究理事会;

关键词：

LASER-SHOCKED SOLIDS; PRESSURE IONIZATION; ENERGY; SHIFT; BEAMS; EDGE;

D O I：

10.1103/PhysRevLett.109.065002

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We have used the Linac Coherent Light Source to generate solid-density aluminum plasmas at temperatures of up to 180 eV. By varying the photon energy of the x rays that both create and probe the plasma, and observing the K-alpha fluorescence, we can directly measure the position of the K edge of the highly charged ions within the system. The results are found to disagree with the predictions of the extensively used Stewart-Pyatt model, but are consistent with the earlier model of Ecker and Kroll, which predicts significantly greater depression of the ionization potential.

引用

页数：4

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