Photodetachment of O-

DSpace/Manakin Repository

Show simple item record Zatsarinny, Oleg Bartschat, Klaus 2007-05-31T20:27:02Z 2007-05-31T20:27:02Z 2007-05-31T20:27:02Z
dc.description.abstract Photodetachment of O- (2p5)2P° has been investigated with a new R-matrix (close-coupling) code [1] that uses a B-spline basis for the continuum functions. The completeness of the B-spline basis ensures that no Buttle correction is needed for the R-matrix elements. Another distinguishing feature of the present work is the use of non-orthogonal orbital sets in the construction of the target and the scattering wavefunctions. This allows us to employ a highly correlated target description without possibly introducing inconsistencies between the continuum and the bound parts of the trial wavefunction. Our close-coupling expansion includes the lowest 25 bound and autoionizing states of neutral oxygen. Emphasis was placed on the accuracy of the target wavefunctions by describing each state (including the initial O- state) with a different set of orbitals, determined separately from state-specific multi-configuration Hartree-Fock calculations. Note that using non-orthogonal orbital sets directly accounts for relaxation effects during 2s or 2p excitation. Our absolute values of the photodetachment cross sections exceed the experimental values [2] by 40%. The latter measurements were carried out 45 years ago, but the data are still being used today to normalize current photodetachment measurements. Our previous calculations of B- and C- photodetachment [3] also show excellent agreement with experiment for the energy dependence, but the theoretical absolute values exceed the experimental data by 35%. Note, however, that both the measured B- and C- photodetachment cross sections were normalized to the O- data from [2]. Such very similar discrepancies between the absolute values from three independent calculations with a single experiment suggest a possible systematic error in [2]. [1] O. Zatsarinny, Comp. Phys. Commun. 174 (2006) 273. [2] S.J. Smith, Proc. 4th ICIPG, Uppsala (1959) IC219 [3] O. Zatsarinny and T.W. Gorczyca, Abstracts of XXIII ICPEAC, Stockholm (2003); We026, Th006. en
dc.description.sponsorship This work was supported by the National Science Foundation, under grants PHY-0244470 and PHY-0311161. en
dc.format.extent 2995919 bytes
dc.format.mimetype application/pdf
dc.language.iso en_US
dc.relation.ispartofseries DUCURS 2006;23
dc.subject Photodetachment en
dc.subject Photodissociation en
dc.subject Nuclear physics en
dc.subject Non-orthogonal orbital sets en
dc.subject Quantum mechanics en
dc.title Photodetachment of O- en
dc.type Presentation en

Files in this item

This item appears in the following Collection(s)

  • DUCURS [196]
    Poster sessions and presentation from the Drake University Conference on Undergraduate Research in the Sciences held each April at Olmsted Center on the Drake campus.

Show simple item record

Search DSpace

Advanced Search


My Account