Instrumentation for beam-foil spectroscopic studies in the UV-visible region

Nandi, T.; Nanal, V.; Fernandes, Widinei Alves; Desai, C A; Kurup, M.B.; Prasad, K. Krishna; Rao, P. Mohan; Padmanabhan, S.

doi:10.1007/bf02898213

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“…Each measurement was repeated at least three times at various beam energies ranging from 200 to 320 keV using different foils. A more detailed description of target chamber assembly, spectrometer system and electronic circuits is given elsewhere [10,11].…”

Section: Experimental Set-upmentioning

confidence: 99%

Lifetimes of some O II levels by beam-foil experiments

Nandi

Marketos

Bhattacharya

et al. 1999

J. Phys. B: At. Mol. Opt. Phys.

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Using the beam-foil technique and rather low beam energies (in the range 216-296 keV) in order to reduce cascade corrections, we have determined lifetimes for the , and terms of O II and compared them with predictions from various theoretical and experimental approaches. Our results support the claim for a short average lifetime. Experimental lifetimes for , and have been determined for the first time. The first two compare well with the opacity project results, whereas the experimental lifetime of level, a pseudo-five-electron system lying above the O II ionization limit, is a factor of four smaller.

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Section: Experimental Set-upmentioning

confidence: 99%