PRODUCTION AND TRAPPING OF HYDROGENLIKE AND BARE URANIUM IONS IN AN ELECTRON-BEAM ION-TRAP

被引：198

作者：

MARRS, RE

ELLIOTT, SR

KNAPP, DA

机构：

[1] Physics Department, Lawrence Livermore National Laboratory, Livermore

来源：

PHYSICAL REVIEW LETTERS | 1994年 / 72卷 / 26期

关键词：

D O I：

10.1103/PhysRevLett.72.4082

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

An equilibrium population of approximately 500 hydrogenlike U91+ ions and ten fully stripped U92+ ions has been produced and trapped in an electron beam ion trap at 198-keV electron energy. The equilibrium ionization balance, determined from the intensities of radiative recombination x rays, gives values of 1.55 +/- 0.27 and 2.82 +/- 0.35 b for the electron impact ionization cross sections of hydrogenlike and heliumlike uranium, respectively. These values are somewhat larger than relativistic distorted wave calculations, and much smaller than previous values inferred from stripping of accelerator beams.

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页码：4082 / 4085

页数：4

相关论文

共 23 条

[1] STRUCTURE AND LAMB SHIFT OF 2S(1/2)-2P(3/2) LEVELS IN LITHIUM-LIKE U89+ THROUGH NEON-LIKE U82+ [J].

BEIERSDORFER, P ;

KNAPP, D ;

MARRS, RE ;

ELLIOTT, SR ;

CHEN, MH .

PHYSICAL REVIEW LETTERS, 1993, 71 (24) :3939-3942

[2] OBSERVATION AND MEASUREMENT OF N=2-]N=1 TRANSITIONS OF HYDROGENLIKE AND HELIUM-LIKE URANIUM [J].

BRIAND, JP ;

CHEVALLIER, P ;

INDELICATO, P ;

ZIOCK, KP ;

DIETRICH, DD .

PHYSICAL REVIEW LETTERS, 1990, 65 (22) :2761-2764

[3] MINIATURE HIGH-CURRENT METAL-ION SOURCE [J].

BROWN, IG ;

GALVIN, JE ;

MACGILL, RA ;

WRIGHT, RT .

APPLIED PHYSICS LETTERS, 1986, 49 (16) :1019-1021

[4] ELECTRON-IMPACT IONIZATION OF F U-88+-U-91+ [J].

CLAYTOR, N ;

FEINBERG, B ;

GOULD, H ;

BEMIS, CE ;

DELCAMPO, JG ;

LUDEMANN, CA ;

VANE, CR .

PHYSICAL REVIEW LETTERS, 1988, 61 (18) :2081-2084

[5] A HIGH-ENERGY ELECTRON-BEAM ION-TRAP FOR PRODUCTION OF HIGH-CHARGE HIGH-Z IONS [J].

KNAPP, DA ;

MARRS, RE ;

ELLIOTT, SR ;

MAGEE, EW ;

ZASADZINSKI, R .

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT, 1993, 334 (2-3) :305-312

[6]

KNAPP DM, UNPUB

[7] THE ELECTRON-BEAM ION TRAP - A NEW INSTRUMENT FOR ATOMIC PHYSICS MEASUREMENTS [J].

LEVINE, MA ;

MARRS, RE ;

HENDERSON, JR ;

KNAPP, DA ;

SCHNEIDER, MB .

PHYSICA SCRIPTA, 1988, T22 :157-163

[8] ELECTRON-IMPACT IONIZATION CROSS-SECTIONS AND IONIZATION RATE COEFFICIENTS FOR ATOMS AND IONS FROM HYDROGEN TO CALCIUM [J].

LOTZ, W .

ZEITSCHRIFT FUR PHYSIK, 1968, 216 (03) :241-&

[9] MEASUREMENT OF ELECTRON-IMPACT EXCITATION CROSS-SECTIONS FOR VERY HIGHLY CHARGED IONS [J].

MARRS, RE ;

LEVINE, MA ;

KNAPP, DA ;

HENDERSON, JR .

PHYSICAL REVIEW LETTERS, 1988, 60 (17) :1715-1718

[10] LAMB SHIFT IN HELIUM-LIKE URANIUM (U-90+) [J].

MUNGER, CT ;

GOULD, H .

PHYSICAL REVIEW LETTERS, 1986, 57 (23) :2927-2930