Peer-Reviewed Journal Details
Mandatory Fields
Gaynor, L;Murphy, N;Kilbane, D;Cummings, A;O'Sullivan, G;Costello, JT;van Kampen, P;Kennedy, ET
2005
August
Journal Of Physics B: Atomic, Molecular And Optical Physics
EUV photoabsorption of laser produced tellurium plasmas: TeI-TeIV
Published
4 ()
Optional Fields
4D PHOTOABSORPTION CROSS-SECTIONS PHOTO-IONIZATION ABSORPTION-SPECTROSCOPY DISCRETE STRUCTURE IONS SPECTRUM PHOTOIONIZATION ATOMS RADIATION
38
2895
2909
The photoabsorption spectra of Te I through to Te IV have been recorded in the extreme ultraviolet (EUV) region using the dual laser plasma (DLP) technique. Photoexcitation from the 4d subshell is the dominant process in the 50 to 130 eV region. Above the 4d ionization thresholds the spectra were found to be dominated by a 4d -> epsilon f shape resonance which peaks at 88 eV in each case, indicating that complete 4f "collapse" has not occurred in stages up to and including Te3+. A transfer of oscillator strength from the resonance to the pseudo-discrete 4d -> nf (n >= 4) transitions with increasing ionization is evident from Te2+ onwards with the 4d(10)5s(2)5p(2)P3/2 -> 4d(9)5s(2)5p4f(D-3)(2)D5/2 transition being the strongest feature in the Te IV spectrum. Time-dependent local density approximation (TDLDA) calculations successfully account for the shape resonance while Hartree-Fock with configuration interaction calculations permit identification of the discrete features.
BRISTOL
0953-4075
10.1088/0953-4075/38/16/004
Grant Details