A recent experimental study [J.-E. Rubensson et al., Phys. Rev. Lett. 83, 947 (1999)] measured a significant fluorescence yield of the He(2lnl0) photoexcited resonances, showing major qualitative differences from nonrelativistic predictions. We present a further theoretical study of these states, and perform R-matrix multichannel quantum defect theory calculations to extract fluorescence and ionization cross sections. These theoretical results are in excellent agreement with newer, higher-resolution measurements. Radiative and spin-orbit effects are quantified and shown to play an important role in the overall characterization of highly excited states.
Radiative and relativistic effects in the decay of highly-excited states in helium / Gorczyca, T. W.; Rubensson, J. E.; Sathe, C.; Strom, M.; Agaker, M.; Ding, D.; Stranges, Stefano; Richter, R.; Alagia, M.. - In: PHYSICAL REVIEW LETTERS. - ISSN 0031-9007. - STAMPA. - 85:(2000), pp. 1202-1205.
Radiative and relativistic effects in the decay of highly-excited states in helium
STRANGES, Stefano;
2000
Abstract
A recent experimental study [J.-E. Rubensson et al., Phys. Rev. Lett. 83, 947 (1999)] measured a significant fluorescence yield of the He(2lnl0) photoexcited resonances, showing major qualitative differences from nonrelativistic predictions. We present a further theoretical study of these states, and perform R-matrix multichannel quantum defect theory calculations to extract fluorescence and ionization cross sections. These theoretical results are in excellent agreement with newer, higher-resolution measurements. Radiative and spin-orbit effects are quantified and shown to play an important role in the overall characterization of highly excited states.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
