Very narrow doubly excited 2(1,0)−nand 2(-1,0)0n1Postates of helium
- 1 July 1993
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review A
- Vol. 48 (1) , 841-844
- https://doi.org/10.1103/physreva.48.841
Abstract
We present a detailed theoretical study of the very narrow A=- and A=0 series seen in the recently reported high-resolution photoionization spectrum of He below the N=2 threshold [M. Domke et al., Phys. Rev. Lett. 66, 1306 (1992)]. The hyperspherical close-coupling method combined with the multichannel quantum-defect theory is used and the photoionization cross section has been calculated over a wide energy range with high efficiency. Our results are in excellent agreement with the experimental data and compare favorably with recent accurate theoretical works.Keywords
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