Verification of the core-hole-clock method using two different time references: Attosecond charge transfer in c(4 × 2)S/Ru(0 0 0 1)
- 作者：A. Fö ; hlisch ; S. Vijayalakshmi ; F. Hennies ; W. Wurth ; V.R.R. Medicherla ; W. Drube
- 刊名：Chemical Physics Letters
- 出版年：2007
- 期刊代码：7_00092614
- 类别：ph
- 出版时间：5 February 2007
- 卷：434
- 期：4-6
- 页码：214-217
- 文件大小：229 K
摘要
Core-hole-clock spectroscopy is increasingly used to determine femtosecond and attosecond charge transfer processes initiated at an atomically defined starting point. We give proof that the time constant of a charge transfer process determined by the core-hole-clock method is probed, but not governed by the spectroscopic process. To this end, charge transfer in c(4 × 2)S/Ru(0 0 0 1) has been probed by two investigations using core level resonances with identical symmetry but excitation photon energies one order of magnitude apart (S2s → 3p at 227.5 eV, S s→ 3p at 2471.1 ± 0.3 eV). Despite the large difference in excitation energy, the measured charge transfer times agree.