title: Electron-Impact Cross Sections for Dipole- and Spin-Allowed Excitations of Hydrogen, Helium, and Lithium.
abstract: Electron-impact excitation cross sections are presented for the dipole- and spin allowed transitions from the ground states to the np (2)P states for hydrogen and lithium, and to the 1snp (1)P states for helium, n = 2 through 10. Two scaling formulas developed earlier by Kim [Phys. Rev. A 64, 032713 (2001)] for plane-wave Born cross sections are used. The scaled Born cross sections are in excellent agreement with available theoretical and experimental data.
authors.affiliation: National Institute of Standards and Technology, Gaithersburg, MD 20899-8421.
authors.forename: Philip M
authors.initials: PM
authors.lastname: Stone
authors.affiliation: National Institute of Standards and Technology, Gaithersburg, MD 20899-8421.
authors.forename: Yong-Ki
authors.initials: YK
authors.lastname: Kim
authors.affiliation: 15 Chemin du Billery, F-38360 Sassenage, France.
authors.forename: J P
authors.initials: JP
authors.lastname: Desclaux
keywords: electron-impact; excitation cross section; helium; hydrogen; lithium