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| Query : 2005ApJ...630.1213S |
2005ApJ...630.1213S - Astrophys. J., 630, 1213-1216 (2005/September-2)
Measurement of absolute cross sections for excitation of the 2s2 1S ⟶ 2s2p 1Po transition in O+4.
SMITH S.J., DJURIC N., LOZANO J.A., BERRINGTON K.A. and CHUTJIAN A.
Abstract (from CDS):
Experimental cross sections are reported for the 1s22s21S⟶1s22s2p1P° transition in O+4 located at 19.689 eV. Use is made of the electron energy-loss method, using a merged electron-ion beam geometry. The center-of-mass interaction energies for the measurements in the 1S⟶1P° transition are in the range 18 eV (below the threshold) to 30 eV. Data are compared with other previous electron energy-loss measurements and with results of a 26 term R-matrix calculation that includes fine structure explicitly via the Breit-Pauli Hamiltonian. Clear resonance enhancement is observed in all experimental and theoretical results near the threshold for this 1S⟶1P° transition.
Abstract Copyright: ∼
Journal keyword(s): Atomic Data - Atomic Processes - Stars: Abundances - Sun: Abundances
Simbad objects: 2
| Number of rows : 2 |
| N | Identifier | Otype |
ICRS (J2000) RA |
ICRS (J2000) DEC |
Mag U | Mag B | Mag V | Mag R | Mag I | Sp type |
#ref
1850 - 2026 |
#notes |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | * alf Aur | SB* | 05 16 41.35871 | +45 59 52.7693 | 1.33 | 0.88 | 0.08 | -0.52 | -0.96 | G3III: | 1207 | 0 |
| 2 | HD 197481 | BY* | 20 45 09.5324974119 | -31 20 27.237889841 | 10.05 | 8.627 | 9.078 | 6.593 | M1VeBa1 | 1344 | 0 |
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