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Characterisation of a new VUV beamline at the Daresbury SRS using a dispersed fluorescence apparatus incorporating CCD detection

Howle, C. R. and Ali, S. and Tuckett, R. P. and Shaw, D. A. and West, J. B. (2005) Characterisation of a new VUV beamline at the Daresbury SRS using a dispersed fluorescence apparatus incorporating CCD detection. Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, 237 (3-4). pp. 656-665. ISSN 0168-583X

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URL of Published Version: http://dx.doi.org/10.1016/j.nimb.2005.03.287

Identification Number/DOI: doi:10.1016/j.nimb.2005.03.287

The design and performance of a new normal incidence monochromator at the Daresbury Synchrotron Radiation Source, optimised for experiments requiring high flux of vacuum-UV radiation, are described. The re-developed beamline 3.1, based on the Wadsworth design of monochromator, is the source of tunable vacuum-UV photons in the range 4 – 31 eV, providing over two orders of magnitude more flux than the vacuum-UV, Seya monochromator in its previous manifestation. The undispersed and dispersed fluorescence spectra resulting from photoexcitation of N\(_2\), CO\(_2\), CF\(_4\) and C\(_6\)F\(_6\) are presented. Emitting species observed were N\(_2^+\) B\(^2\Sigma_u^+\) - X\(^2\Sigma_g^+\), CO\(_2^+\) A\(^2\Pi_u\) - X\(^2\Pi_g\) and B\(^2\Sigma_u^+\) - X\(^2\Pi_g\), CF\(_4\)\(^+\) C\(^2\)T\(_2\) - X\(^2\)T\(_1\) and C\(^2\)T\(_2\) - A\(^2\)T\(_2\), CF\(_3\)* \(^2\)A\(^’_2\) - \(^2\)A\(^”_2\), and C\(_6\)F\(_6^+\) B\(^2\)A\(_{2u}\) - X\(^2\)E\(_{1g}\). A CCD multi-channel detector has significantly reduced the time period needed to record dispersed fluorescence spectra with a comparable signal-to-noise ratio.

Type of Work:Article
Date:2005 (Publication)
School/Faculty:Schools (1998 to 2008) > School of Chemical Sciences
Department:School of Chemistry
Subjects:
Institution:University of Birmingham
Copyright Holders:Elsevier B.V.
ID Code:756
Refereed:YES
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