由强超短激光脉冲产生的ne(n+)离子的动量分布。

Momentum distributions of ne(n+) ions created by an intense ultrashort laser pulse.

作者信息

Moshammer R, Feuerstein B, Schmitt W, Dorn A, Schroter CD, Ullrich J, Rottke H, Trump C, Wittmann M, Korn G, Hoffmann K, Sandner W

机构信息

Universitat Freiburg, Hermann-Herder Strasse 3, D-79104 Freiburg, Germany.

出版信息

Phys Rev Lett. 2000 Jan 17;84(3):447-50. doi: 10.1103/PhysRevLett.84.447.

DOI:10.1103/PhysRevLett.84.447

PMID:11015935

Abstract

Vector momentum distributions of Ne(n+) (n = 1,2,3) ions created by 30 fs, approximately 1 PW/cm(2) laser pulses at 795 nm have been measured using recoil-ion momentum spectroscopy. Distinct maxima along the light polarization axis are observed at 4.0 and 7.5 a.u. for Ne2+ and Ne3+ production, respectively. Hence, mechanisms based on an instantaneous release of two (or more) electrons can be ruled out as a dominant contribution to nonsequential strong-field multiple ionization. The positions of the maxima are in accord with kinematical constraints set by the classical "rescattering model."

摘要

利用反冲离子动量谱，测量了由795nm波长、30fs、约1PW/cm²的激光脉冲产生的Ne(n+)（n = 1,2,3）离子的矢量动量分布。在Ne2+和Ne3+产生时，分别在4.0和7.5原子单位处观察到沿光偏振轴的明显最大值。因此，可以排除基于两个（或更多）电子瞬间释放的机制作为非顺序强场多电离的主要贡献。最大值的位置符合经典“再散射模型”设定的运动学约束。