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UV, VUV and soft X-ray photoabsorption of dimethyl ether by dipole (e,e) spectroscopies by Renfei Feng; Glyn Cooper; C.E Brion is a Physics and Astronomy article available to read on EtoBox.

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Absolute UV and VUV photoabsorption oscillator strengths (cross-sections) for the valence shell discrete and continuum regions of dimethyl ether (CH 3 OCH 3 , DME) have been measured from 5 to 32 eV using high resolution (HR) ($0.05 eV f.w.h.m.) dipole (e,e) spectroscopy. A wide-range spectrum, spanning the UV, VUV and soft X-ray regions, from 5 to 200 eV has also been obtained at low resolution (LR) ($1 eV f.w.h.m.), and this has been used to determine the absolute oscillator strength scale by employing valence shell Thomas±Reiche±Kuhn (i.e., S(0)) sum-rule normalization. The presently reported HR and LR absolute photoabsorption oscillator strengths are compared with previously published data from direct photoabsorption measurements in those limited energy regions where such data are available. Evaluation of the SÀ2 sum using the presently reported absolute dierential photoabsorption oscillator strength data gives a static dipole polarizability for dimethyl ether in excellent agreement (within 0.5%) with previously reported polarizability values. Other dipole sums Su, u À1Y À3Y À4Y À5Y À6Y À8Y À10, and logarithmic dipole sums Lu, (u À1 to À6), are also determined from the presentl

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Author

Renfei Feng; Glyn Cooper; C.E Brion

Publisher

Elsevier Science; Elsevier ; Elsevier BV (ISSN 0301-0104)

Published

2000

Language

EN

Field

Physics and Astronomy (Physical Sciences)