Dynamical correlation in double excitations of helium studied by high-resolution and angular-resolved fast-electron energy-loss spectroscopy in absolute measurements.
The momentum transfer dependence of fundamental double excitation processes of helium is studied by absolute measurements using an angular resolved fast-electron energy loss spectrometer with high energy resolution. It elucidates the dynamical correlations, in terms of internal correlation quantum numbers, K, T, and A. The Fano profile parameters q, f(a), rho2, f, and S of doubly excited states (2)(1,0)+2 (1)S(e), (2)(1,0)+2 (1)D(e), and (2)(0,1)+2 (1)P(o) are reported as functions of momentum transfer K2. Qualitative analysis is given for the states of (2)(-1,0)+2 (1)S(e) and (2)(1,0)+2 (1)S(e).
Liu
Xiao-jing
XJ
Laboratory of Bond-Selective Chemistry, Department of Modern Physics, University of Science and Technology of China, Hefei, Anhui 230027, China. xjliu@ustv.edu.cn
Zhu
Lin-fan
LF
Yuan
Zhen-sheng
ZS
Li
Wen-bin
WB
Cheng
Hua-dong
HD
Huang
Yu-ping
YP
Zhong
Zhi-ping
ZP
Xu
Ke-zun
KZ
Li
Jia-ming
JM