Published February 3, 2006
| Version v1
Journal article
Double Excitations of Helium in Weak Static Electric Fields
Creators
- 1. Physics Department, Box 530, S-751 21 Uppsala (Sweden)
- 2. Sincrotrone Trieste, I-340 12 Trieste (Italy)
- 3. INFM-TASC, Padriciano 99, I-340 12 Trieste (Italy)
- 4. Dipartimento di Chimica, Universita di Roma 'La Sapienza' and INFM Unit, 00185 Rome (Italy)
- 5. Department of Physics, Western Michigan University, Kalamazoo, Michigan 49008-5252 (United States)
- 6. Department of Physics, Auburn University, Auburn, Alabama 3684 (United States)
Description
A dramatic electric field dependence has been observed in the fluorescence yield spectrum of the doubly excited states in helium, where a rich phenomenology is encountered below the N=2 threshold. Fluorescence yields of certain states can be tuned to zero, while other dipole-forbidden states are significantly enhanced, for fields much weaker than 1 kV/cm. Using an R-matrix multichannel quantum defect theory, spherical-to-parabolic frame transformation method, we are able to reproduce the main features of the observed spectrum, and we discuss the qualitative behavior in terms of weak electric field mixing
Additional details
Identifiers
Publishing Information
- Journal Title
- Physical Review Letters
- Journal Volume
- 96
- Journal Issue
- 4
- Journal Page Range
- p. 043002-043002.4
- ISSN
- 0031-9007
- CODEN
- PRLTAO
INIS
- Country of Publication
- United States
- Country of Input or Organization
- International Atomic Energy Agency (IAEA)
- INIS RN
- 37082837
- Subject category
- S71: CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; S74: ATOMIC AND MOLECULAR PHYSICS;
- Descriptors DEI
- DIPOLES; ELECTRIC FIELDS; ELECTROLUMINESCENCE; EXCITATION; EXCITED STATES; FLUORESCENCE; HELIUM; R MATRIX
- Descriptors DEC
- ELEMENTS; EMISSION; ENERGY LEVELS; ENERGY-LEVEL TRANSITIONS; FLUIDS; GASES; LUMINESCENCE; MATRICES; MULTIPOLES; NONMETALS; PHOTON EMISSION; RARE GASES
Optional Information
- Notes
- (c) 2006 The American Physical Society