摘要By using a semiclassical method, we present theoretical computations of the ionization rate of Rydberg lithium atoms in parallel electric and magnetic fields with different scaled energies above the classical saddle point. The yielded irregular pulse trains of the escape electrons are recorded as a function of emission time, which allows for relating themselves to the terms of the recurrence periods of the photoabsorption. This fact turns to illustrate the dynamic mechanism how the electron pulses are stochastically generated. Comparing our computations with previous investigation results, we can deduce that the complicated chaos under consideration here consists of two kinds of self-similar fractal structures which correspond to the contributions of the applied magnetic field and the core scattering events. Furthermore, the effect of the magnetic field plays a major role in the profile of the autoionization rate curves, while the contribution of the core scattering is critical for specifying the positions of the pulse peaks.
Abstract：By using a semiclassical method, we present theoretical computations of the ionization rate of Rydberg lithium atoms in parallel electric and magnetic fields with different scaled energies above the classical saddle point. The yielded irregular pulse trains of the escape electrons are recorded as a function of emission time, which allows for relating themselves to the terms of the recurrence periods of the photoabsorption. This fact turns to illustrate the dynamic mechanism how the electron pulses are stochastically generated. Comparing our computations with previous investigation results, we can deduce that the complicated chaos under consideration here consists of two kinds of self-similar fractal structures which correspond to the contributions of the applied magnetic field and the core scattering events. Furthermore, the effect of the magnetic field plays a major role in the profile of the autoionization rate curves, while the contribution of the core scattering is critical for specifying the positions of the pulse peaks.
LIN Sheng-Lu;ZHOU Hui;XU Xue-You;JIA Zheng-Mao;DENG Shan-Hong. Semiclassical Calculations of Autoionization Rate for Lithium Atoms in Parallel Electric and Magnetic Fields[J]. 中国物理快报, 2008, 25(12): 4251-4254.
LIN Sheng-Lu, ZHOU Hui, XU Xue-You, JIA Zheng-Mao, DENG Shan-Hong. Semiclassical Calculations of Autoionization Rate for Lithium Atoms in Parallel Electric and Magnetic Fields. Chin. Phys. Lett., 2008, 25(12): 4251-4254.
[1] Lankhuijzen G M and Noordam L D 1996 Phys. Rev.Lett. 76 1748 [2] Mitchell A, Handley J P, Tighe B and Delos J B 2003 Chaos 13 880 Mitchell A, Handley J P, Tighe B and Delos J B 2003 Chaos 13 892 [3] Mitchell K A, Handley J P, Tighe B and Delos J B 2004 Phys. Rev. Lett. 92 073001 Mitchell K A, Handley J P, Tighe B and Delos J B 2004 Phys. Rev. A 70 043407 [4] Topcu T and Robicheaux F 2007 J. Phys. B: At. Mol.Opt. Phys. 40 1925 [5] Zhou H, Li H Y, Gao S, Zhang Y H, Jia Z M and Lin S L 2008 Chin. Phys B (in press) [6]Lin S L, Zhang Q J, Zhao K, Song X H and Zhang Y H 2002 Chin. Phys. Lett. 19 29 [7] Courtney M, Spellmeyer N, Jiao H and Kleppner D 1995 Phys. Rev. A 51 3604 [8] Delande D and Buchleitner A 1994 Adv. At. Mol. Opt. Phys. 34 85 [9] Song X H and Lin S L 2003 Chin. Phys. 52 1611(in Chinese) [10] Dando P A, Monteiro T S, Delande D and Taylor K T 1996 Phys. Rev. A 54 127 [11] Tiyapan A and Jaff\'{e C 1995 J. Chem. Phys. 103 5499 [12] Du M L and Delos J B 1988 Phys. Rev. A 381896 Du M L and Delos J B 1988 Phys. Rev. A 38 1913
2008, Vol. 25 
