Recombination measurements at low energies with Ar16+ and Ar18+ ions in a dense, cold electron target

被引：25

作者：

Uwira, O

Muller, A

Spies, W

Frank, A

Linkemann, J

Brandau, C

Cramer, T

Kozhuharov, C

Klabunde, J

Angert, N

Mokler, PH

Becker, R

Kleinod, M

Badnell, NR

机构：

[1] UNIV STUTTGART, INST STRAHLENPHYS, D-70550 STUTTGART, GERMANY

[2] GESELL SCHWERIONENFORSCH INST DARMSTADT, D-64291 DARMSTADT, GERMANY

[3] UNIV FRANKFURT, INST ANGEW PHYS, D-60054 FRANKFURT, GERMANY

[4] UNIV STRATHCLYDE, DEPT PHYS & APPL PHYS, GLASGOW G4 0NG, LANARK, SCOTLAND

来源：

HYPERFINE INTERACTIONS | 1997年 / 108卷 / 1-3期

关键词：

RADIATIVE RECOMBINATION;

D O I：

10.1023/A:1012698310084

中图分类号：

O64 [物理化学（理论化学）、化学物理学]; O56 [分子物理学、原子物理学];

学科分类号：

070203 ; 070304 ; 081704 ; 1406 ;

摘要：

Recombination of multiply charged ions with electrons at very low relative energies has become a major topic of interest, due to the observation of rates which are enhanced beyond the expectations for radiative recombination. We present results for Ar16+ and Ar18+ ions from systematic measurements along the argon isonuclear sequence using a high density cold electron beam target (n(e) = 7 x 10(9) cm(-3)) at the UNILAC of GSI. The transverse and longitudinal temperatures of the electron beam were determined from DR resonance features observed with metastable Ar16+(2(3)S) ions, The rate at E-rel = 0 for radiative recombination of completely stripped Ar18+ calculated with electron beam temperatures kT(parallel to) = 0.002 eV, kT(perpendicular to) = 0.2 eV amounts to alpha = 10(-9) cm(3) s(-1). This is exceeded by nearly a factor of 10 by the rate measured in experiments with Ar18+ ions.

引用

页码：167 / 175

页数：9