The perturbed even-parity J = 1e, 2eautoionizing spectra of strontium below the 4d5/2threshold: observation and theoretical analysis
- 28 August 1992
- journal article
- Published by IOP Publishing in Journal of Physics B: Atomic, Molecular and Optical Physics
- Vol. 25 (16) , 3433-3461
- https://doi.org/10.1088/0953-4075/25/16/005
Abstract
The even-parity J = 1e, 2e autoionizing spectra of neutral strontium are investigated below the 4d5/2 threshold in a two-step laser experiment via the 4d5p 1P1 level in a strontium atomic beam. The produced Sr+ ions are analysed by a time-of-flight microchannel plate detector. The J final level assignment is obtained by comparing the line intensity dependence from two recorded spectra with pi pi and pi sigma polarizations of the two lasers. More than 400 new resonance lines are measured with an accuracy of +or-0.2 cm-1 for the narrow ones using standard laser calibration procedures. They are assigned to fifteen autoionizing Rydberg series 4dns, 4dn d and 4dng and many perturbers belonging to the 5p6p configuration. Interpretation is made by a combination of the eigenchannel R-matrix and multichannel quantum defect methods (MQDT).Keywords
This publication has 20 references indexed in Scilit:
- Eigenchannel R-matrix study of the J=0 and J=2 even parity spectra of calcium below the Ca+3d3/2thresholdJournal of Physics B: Atomic, Molecular and Optical Physics, 1991
- Eigenchannel R-matrix calculation of the J=1 odd-parity spectrum of bariumJournal of Physics B: Atomic, Molecular and Optical Physics, 1990
- Eigenchannel R-matrix calculation of the photoabsorption spectrum of strontiumJournal of Physics B: Atomic and Molecular Physics, 1987
- R-matrix calculation of eigenchannel multichannel quantum defect parameters for strontiumJournal of Physics B: Atomic and Molecular Physics, 1987
- Channel-interaction theory in a finite volumePhysical Review A, 1985
- Absorption spectrum of Sr i between 1400 and 1900 ÅJournal of the Optical Society of America, 1983
- Multichannel Quantum Defect Analysis of the Autoionized Even-parity Spectrum of Neutral Barium below the 5d2D3/2LimitPhysica Scripta, 1983
- Two-Step Optogalvanic Spectroscopy of Neutral Barium: Observation and Interpretation of the Even Levels Above the 6sIonization Limit Between 5.2 and 7 eVPhysica Scripta, 1983
- Potential barrier effects on double excitation series of Ca I and Sr IProceedings of the Royal Society of London. Series A. Mathematical and Physical Sciences, 1980
- Bound, even-parityandspectra of SrPhysical Review A, 1977