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Measurement of the wavelength-dependent photoionization cross section of Se*(1S) in the spectral region of 170-175 nm

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3 Author(s)
Grattan, K.T.V. ; Blackett Lab., Imperial College, Univ. of London, London, England ; Hutchinson, H. ; Theocharous, E.

The photoionization cross section of excited atomic selenium, Se(1S0), obtained by photodissociation of OCSe, has been measured in the wavelength region of 170-175 nm using a tunable xenon laser. A minimum value, at 172 nm, was found to be1.2 times 10^{-20}cm2, approximately ten times less than a recently calculated value. The photodissociation cross section for OCSe, at the same wavelength, was found to be0.8 times 10^{-16}cm2, in good agreement with published work. The effect of an election cooling buffer gas upon the electron production from excited selenium was also investigated.

Published in:

Quantum Electronics, IEEE Journal of  (Volume:16 ,  Issue: 11 )