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Electron excitation rate coefficients for transitions from the 1s/sup 1/ /sup 1/S ground state to the 1s2s /sup 1. 3/S and and 1s2p /sup 1. 3/P/sup 0/ excited states of helium

Journal Article · · Astrophys. J.; (United States)
DOI:https://doi.org/10.1086/161856· OSTI ID:7098770
; ;
The available experimental and theoretical electron impact excitation cross section data for the transitions from the 1s/sup 2/ /sup 1/S ground state to the 1s2s /sup 1.3/S and 1s2p /sup 1.3/P/sup 0/ excited states of helium are assessed. Based on this assessed tata, excitaion rate coefficients are calculated over a wide electron temperature range below 3.0 x 10/sup 6/ K. A comparison with other published results suggests that the rates used should be lower by a factor of 2 or more, especially for the transitions 1 /sup 1/S ..-->.. 2 /sup 1/S and 1 /sup 1/S ..-->.. 2 /sup 3/P/sup 0/.
Research Organization:
Department of Applied Mathematics and Theoretical Physics, The Queen's University of Belfast
OSTI ID:
7098770
Journal Information:
Astrophys. J.; (United States), Journal Name: Astrophys. J.; (United States) Vol. 278:2; ISSN ASJOA
Country of Publication:
United States
Language:
English

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Related Subjects

640302 -- Atomic
Molecular & Chemical Physics-- Atomic & Molecular Properties & Theory
640304* -- Atomic
Molecular & Chemical Physics-- Collision Phenomena
74 ATOMIC AND MOLECULAR PHYSICS
ATOM COLLISIONS
COLLISIONS
CROSS SECTIONS
ELECTRON COLLISIONS
ELECTRON-ATOM COLLISIONS
ELEMENTS
ENERGY LEVELS
ENERGY-LEVEL TRANSITIONS
EXCITATION
EXCITED STATES
FLUIDS
GASES
GROUND STATES
HELIUM
MECHANICS
NONMETALS
QUANTUM MECHANICS
RARE GASES