Giant-dipole-resonance absorption in atomic thorium by a novel two-laser technique
Carroll, P.K. and Costello, John T. (1986) Giant-dipole-resonance absorption in atomic thorium by a novel two-laser technique. Physical Review Letters, 57 (13). pp. 1581-1583. ISSN 0031-9007
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A novel two-laser technique for photoabsorption studies of refractory and corrosive elements is described and applied to observe for the first time the absorption spectrum of atomic thorium. Results on the giant 5d dipole resonance in the extreme uv are found to be in good qualitative agreement with recent theoretical predictions. The spectrum is very similar to that reported for the metal, indicating that the 5f wave function is largely unaffected by its solid environment.
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