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- W2013703333 abstract "The partial and total cross sections for photodetachment of the 1s2s2p metastable state of the negative helium ion are evaluated over a wide range of initial photon energies. The calculation employs a multichannel theory based upon the R-matrix method for electron-atom collisions, where sophisticated configuration-interaction wavefunctions represent both the initial and final states. The prominent 1s2P and 1s3P resonance structures are identified and found to dominate the total cross section in the low-energy region. Two smaller Feshbach-type resonance structures due to the presence of the 1s3s4s and 1s3p4p states are also located and good agreement is found with the most recent theoretical and experimental work. At the higher photon energies the photodetachment cross section is dominated by a 2s2P hollow-ion resonance, found to exist around the 1s threshold. In addition, two Cooper minima due to the 1s2p(P channel are located at the initial photon energies 2.8180 and 3.2609 eV. Comparisons are made with previous experimental data and theoretical calculations and in general excellent agreement is observed over the entire energy range considered, namely from threshold to the 1s detachment threshold." @default.
- W2013703333 created "2016-06-24" @default.
- W2013703333 creator A5031082997 @default.
- W2013703333 creator A5054908673 @default.
- W2013703333 date "1999-01-01" @default.
- W2013703333 modified "2023-09-25" @default.
- W2013703333 title "Photodetachment cross sections for the 1s2s2p metastable state of the negative helium ion" @default.
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- W2013703333 doi "https://doi.org/10.1088/0953-4075/32/5/021" @default.
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