Kaziannis S, Kosmidis C
Department of Physics, University of Ioannina, 45110 Ioannina, Greece.
J Phys Chem A. 2007 Apr 19;111(15):2839-51. doi: 10.1021/jp068300b. Epub 2007 Mar 23.
The interaction of C2H5X, 1-C3H7X, 1-C4H9X, where X = I, Br, Cl, with strong (1 x 10(13)-1.2 x 10(14) W/cm2) 35 ps laser pulses at 1064 nm is studied by means of time-of-flight mass spectrometry. The multielectron ionization following the C-X bond elongation has been verified for the studied molecules. By combination of the intensity dependence of the ion yields, the estimated kinetic energies of the released fragment ions, and their angular distributions, we have identified the different dissociation channels of the transient multiply charged parent ions. From the dependence on the laser intensity of the ratio of the doubly charged halogen ions to the singly charged ones, it is concluded that the molecular coupling with the laser field increases with the molecular size.
采用飞行时间质谱法研究了C2H5X、1-C3H7X、1-C4H9X（其中X = I、Br、Cl）与波长为1064 nm的强激光脉冲（1×10¹³ - 1.2×10¹⁴ W/cm²，脉宽35 ps）的相互作用。已证实所研究分子在C - X键伸长后会发生多电子电离。通过结合离子产率的强度依赖性、释放的碎片离子的估计动能及其角分布，我们确定了瞬态多电荷母离子的不同解离通道。从双电荷卤素离子与单电荷卤素离子的比例对激光强度的依赖性得出结论，分子与激光场的耦合随分子尺寸的增加而增强。
