Angular-momentum transfer in collisional ionization

Journal Article · Fri Jul 01 00:00:00 EDT 1994 · Physical Review A; (United States)

DOI:https://doi.org/10.1103/PhysRevA.50.429· OSTI ID:7295900

Haffad, A ^[1]; Flannery, M R ^[2]

---

1. Department of Physics and Center for Theoretical Studies of Physical Systems, Clark Atlanta University, Atlanta, Georgia 30314 (United States)
2. School of Physics, Georgia Institute of Technology, Atlanta, Georgia 30332 (United States)

The double-differential cross sections for ionization in [ital e][sup [minus]]+H([ital nl]) collisions are reported as a function of the impact energy [ital E] of the projectile, final energy [ital E][sub [ital f]], and angular momentum [ital L][sub [ital f]] of the ejected electron. This process is assumed to occur via an energy-changing and angular-momentum-changing binary collision between the Rydberg electron in a prepared state ([ital nl]) and the projectile electron [ital e][sup [minus]] or H(1[ital s]). The atomic projectile can also be excited during this process. Systematic trends in the variation of the classical ionization cross sections with final angular momentum [ital L][sub [ital f]] of the ejected electron are discussed and are in accord with a previous quantal treatment, whereby the nondipole ([Delta][ital l][gt]1) transitions are much more important in the low- and intermediate-energy range of relative motion, and that the value of the final angular momentum of the ejected electron depends mainly on the initial value of the principal quantum number [ital n] of the Rydberg atom.

• OSTI ID: 7295900
• Journal Information: Physical Review A; (United States), Journal Name: Physical Review A; (United States) Vol. 50:1; ISSN 1050-2947; ISSN PLRAAN
• Country of Publication: United States
• Language: English

Related Subjects

664300* -- Atomic & Molecular Physics-- Collision Phenomena-- (1992-)
74 ATOMIC AND MOLECULAR PHYSICS
ANGULAR MOMENTUM
ATOM COLLISIONS
BINARY ENCOUNTER METHOD
CALCULATION METHODS
COLLISIONS
CROSS SECTIONS
DIFFERENTIAL CROSS SECTIONS
ELECTRON COLLISIONS
ELECTRON EMISSION
ELECTRON-ATOM COLLISIONS
ELEMENTS
EMISSION
ENERGY LEVELS
EXCITED STATES
HYDROGEN
IONIZATION
MOMENTUM TRANSFER
NONMETALS
QUANTUM NUMBERS
RYDBERG STATES