Study of <math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mrow><msubsup><mrow><mi mathvariant="normal">H</mi></mrow><mrow><mn>2</mn></mrow><mrow><mo>+</mo></mrow></msubsup></mrow></math> + <math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mrow><msub><mrow><mi mathvariant="normal">H</mi></mrow><mrow><mn>2</mn></mrow></msub></mrow></math> → <math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mrow><msubsup><mrow><mi mathvariant="normal">H</mi></mrow><mrow><mn>3</mn></mrow><mrow><mo>+</mo></mrow></msubsup></mrow></math> + H Using Merging Beams

R. H. Neynaber; S. M. Trujillo

doi:10.1103/PhysRev.167.63

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Study of $H_{2}^{+}$ + $H_{2}$ → $H_{3}^{+}$ + H Using Merging Beams

R. H. Neynaber and S. M. Trujillo

Space Science Laboratory, General Dynamics/Convair, San Diego, California

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Phys. Rev. 167, 63 – Published 5 March, 1968Erratum Phys. Rev. 171, 282 (1968)

DOI: https://doi.org/10.1103/PhysRev.167.63

Abstract

A merging-beams technique was used to determine cross sections for the reaction $H_{2}^{+}$ + $H_{2}$ → $H_{3}^{+}$ + H as a function of interaction energy $W$ . Cross-section measurements at $W$ were accompanied by measurements at 1 eV so that we obtained ratios of cross sections, $\frac{Q_{W}}{Q_{1}}$ . These ratios were determined for $0.1 eV \leq W \leq 10 eV$ . Some information about the reaction was also obtained for $W \leq 0.03$ eV. An absolute cross section was determined for $W = 1$ eV. Its estimated error is considerably larger than errors associated with the cross-section ratios. Gioumousis and Stevenson (GS) predict a linear dependence of the cross section on $W^{- \frac{1}{2}}$ . On a $\frac{Q_{W}}{Q_{1}}$ versus $W^{- \frac{1}{2}}$ plot, a straight line can be fitted, within experimental error, to our values for $0.1 eV \leq W \leq 1 eV$ . This line is in fair agreement with that predicted by GS. On either side of this range, however, our ratios fall below the $W^{- \frac{1}{2}}$ fit. Between 5 and 7 eV our results indicate that, within experimental error, $\frac{Q_{W}}{Q_{1}}$ vanishes. On the high-energy side, such a falloff could perhaps be explained by a spectator stripping model. Our cross-section ratios are in general agreement with those obtained from a tandem mass-spectrometer experiment by Giese and Maier, and in rather poor agreement with the results of a single-state mass-spectrometer experiment by Reuben and Friedman. Lower $W' s$ were obtained with the merging-beams technique than with the mass-spectrometer methods.

Erratum

Study of $H_{2}^{+}$ + $H_{2}$ → $H_{3}^{+}$ +H Using Merging Beams

R. H. Neynaber and S. M. Trujillo

Phys. Rev. 171, 282 (1968)

References (12)

V. A. Belyaev, B. G. Brezhnev, and E. M. Erastov, Zh. Eksperim. i Teor. Fiz. 52, 1170 (1967) [English transl.: Soviet Phys.—JETP 25, 777 (1967)]
R. H. Neynaber, S. M. Trujillo, and E. W. Rothe, Phys. Rev. 157, 101 (1967)
G. Gioumousis and D. P. Stevenson, J. Chem. Phys. 29, 294 (1958)
C. F. Giese and W. B. Maier, II, J. Chem. Phys. 39, 739 (1963)
B. G. Reuben and L. Friedman, J. Chem. Phys. 37, 1636 (1962) G. Gioumousis, Lockheed Palo Alto Research Laboratory Report No. 2-12-66-4, 1966 (unpublished)
S. M. Trujillo, R. H. Neynaber, and E. W. Rothe, Rev. Sci. Instr. 37, 1655 (1966)
A. Henglein, Adv. Chem. Ser. 58, 63 (1966)
J. Durup and M. Durup, J. Chim. Phys. 2, 386 (1967)
L. D. Doverspike and R. L. Champion, J. Chem. Phys. 46, 4718 (1967)
F. A. Wolf, in Proceedings of the Twentieth Annual Gaseous Electronics Conference, San Francisco, 1967 (unpublished)
A. Weingartshofer and E. M. Clarke, Phys. Rev. Letters 12, 591 (1964)
W. A. Chupka, in Proceedings of the Fifteenth Annual Conference on Mass Spectrometry and Allied Topics, Denver, Colorado, 1967 (unpublished)

[c1] V. A. Belyaev, B. G. Brezhnev, and E. M. Erastov, Zh. Eksperim. i Teor. Fiz. 52, 1170 (1967) [English transl.: Soviet Phys.—JETP 25, 777 (1967)]

[c2] R. H. Neynaber, S. M. Trujillo, and E. W. Rothe, Phys. Rev. 157, 101 (1967)

[c3] G. Gioumousis and D. P. Stevenson, J. Chem. Phys. 29, 294 (1958)

[c4] C. F. Giese and W. B. Maier, II, J. Chem. Phys. 39, 739 (1963)

[c5] B. G. Reuben and L. Friedman, J. Chem. Phys. 37, 1636 (1962) G. Gioumousis, Lockheed Palo Alto Research Laboratory Report No. 2-12-66-4, 1966 (unpublished)

[c6] S. M. Trujillo, R. H. Neynaber, and E. W. Rothe, Rev. Sci. Instr. 37, 1655 (1966)

[c7] A. Henglein, Adv. Chem. Ser. 58, 63 (1966)

[c8] J. Durup and M. Durup, J. Chim. Phys. 2, 386 (1967)

[c9] L. D. Doverspike and R. L. Champion, J. Chem. Phys. 46, 4718 (1967)

[c10] F. A. Wolf, in Proceedings of the Twentieth Annual Gaseous Electronics Conference, San Francisco, 1967 (unpublished)

[c11] A. Weingartshofer and E. M. Clarke, Phys. Rev. Letters 12, 591 (1964)

[c12] W. A. Chupka, in Proceedings of the Fifteenth Annual Conference on Mass Spectrometry and Allied Topics, Denver, Colorado, 1967 (unpublished)

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Study of $H_{2}^{+}$ + $H_{2}$ → $H_{3}^{+}$ + H Using Merging Beams

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Study of $H_{2}^{+}$ + $H_{2}$ → $H_{3}^{+}$ +H Using Merging Beams

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Study of H2+ + H2 → H3+ + H Using Merging Beams

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Study of H2++H2 → H3++H Using Merging Beams

References (12)

Study of $H_{2}^{+}$ + $H_{2}$ → $H_{3}^{+}$ + H Using Merging Beams

Study of $H_{2}^{+}$ + $H_{2}$ → $H_{3}^{+}$ +H Using Merging Beams