Note on Resonant and Non-resonant Peaks in Electron-Atom Total Scattering Cross Sections

• 来源期刊: 理论物理通讯（英文版）
• 年，卷（期）: 2018,（1）
• 页码范围: 28-30
• 页数: 3页
• 语种: 英文
• DOI: 10.1088/0253-6102/69/1/28

摘要

Certain broad low-energy peaks caused by a single partial wave in total cross sections are explained in terms of phase shifts.Such peaks have been associated with the real part of a Regge pole trajectory,having a maximum near an integer value of the angular momentum quantum number.At the peak energies,the pertinent partial-wave phase shift was shown to have a local maximum near a value π/2 modulo π.This implies no time delay in the semiclassical context.The phenomenon is a quantum effect,lacking a semiclassical interpretation.