ISSN:
0951-4198
Keywords:
Chemistry
;
Analytical Chemistry and Spectroscopy
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Physics
Notes:
Isotope effect on photodetachment cross-sections of OH- and OD- ions was studied using a Fourier-transform ion cyclotron resonance mass spectrometer. The ions were produced by electron impact from a mixture of H2O and D2O gases, trapped in a cylindrical cell and irradiated by a 337 nm photon beam from a nitrogen pulsed laser. Intensities of both ions were measured simultaneously with and without irradiation. This allowed the determination of the ratio of the photodetachment cross-sections of OH- and OD- ions without knowledge of the photon flux intensity and the geometrical overlap factor of laser beam and ion cloud in the cell. From the present result the difference in the equilibrium internuclear distances between OH- and OH was estimated as r(OH-) r(OH) ≍ -0.0074 Å.
Additional Material:
3 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/rcm.1290080509
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