Observation of new Rydberg series and resonances in doubly excited helium at ultrahigh resolution

被引：142

作者：

Schulz, K

Kaindl, G

Domke, M

Bozek, JD

Heimann, PA

Schlachter, AS

Rost, JM

机构：

[1] LAWRENCE BERKELEY LAB,ADV LIGHT SOURCE,BERKELEY,CA 94720

[2] UNIV FREIBURG,FAK PHYS,D-79104 FREIBURG,GERMANY

来源：

PHYSICAL REVIEW LETTERS | 1996年 / 77卷 / 15期

关键词：

D O I：

10.1103/PhysRevLett.77.3086

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We report on a striking improvement in spectral resolution in the soft x-ray range to 1.0 meV at 64.1 eV, measured via the mu eV-wide, 2, -l(3) double-excitation resonance of helium. This ultrahigh resolution combined with the high photon flux at undulator beam line 9.0.1 of the Advanced Light Source have allowed observation of new Rydberg series and resonances below the N = 3 threshold of doubly excited He. The obtained resonance parameters (energies, lifetime widths, and Fano-q parameters) are in excellent agreement with the results of state-of-the-art calculations.

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页码：3086 / 3089

页数：4

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