Using a fixed frequency argon ion laser we have studied the energy spectra of electrons photodetached from OH−, , NH−, , and . We determined the following electron affinities: , EA(NH2)=0.779±0.037 eV, EA(NH)=0.38±0.03 eV, EA(SO2)=1.097±0.036 eV, and EA(S2)=1.663±0.040 eV. Additionally, the angular distribution anisotropy parameter β was measured for OH− and at 4880 Å, as −0.993 ± 0.040, and 0.027±0.012, respectively, and information about negative ion vibrational constants is presented.
REFERENCES
1.
W. C.
Lineberger
and B. W.
Woodward
, Phys. Rev. Lett.
25
, 424
(1970
).2.
W. C.
Lineberger
and T. A.
Patterson
, Chem. Phys. Lett.
13
, 40
(1972
).3.
M. W.
Siegel
, R. J.
Celotta
, J. L.
Hall
, J.
Levine
, and R. A.
Bennett
, Phys. Rev. A
6
, 607
(1972
).4.
R. J.
Celotta
, R. A.
Bennett
, J. L.
Hall
, M. W.
Siegel
, and J.
Levine
, Phys. Rev. A
6
, 631
(1972
).5.
6.
H.
Hotop
, R. A.
Bennett
, and W. C.
Lineberger
, J. Chem. Phys.
58
, 2373
(1973
).7.
8.
9.
See the Appendix of Ref. 6. The calculation of the effective electron affinity of 1.465 eV incorporates estimates of the spin‐orbit splitting, the ion beam temperature, and the electron affinity, which are improved over those originally used in Refs. 3 and 4. It is accidental that the final number remains the same.
10.
11.
12.
13.
14.
15.
16.
17.
F. M. Page and G. C. Goode, Negative Ions and the Magnetron (Wiley‐Interscience, London, 1969), p. 137.
18.
19.
G. Herzberg, Molecular Spectra and Molecular Structure. III. Electronic Spectra and Electronic Structure of Polyatomic Molecules (Van Nostrand, Princeton, New Jersey, 1945), p. 605.
20.
21.
22.
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© 1974 American Institute of Physics.
1974
American Institute of Physics
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