Velocity Distribution of Metastable H Atoms Produced by Dissociative Excitation of <span class="aps-inline-formula"><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></span>

M. Leventhal; R. T. Robiscoe; K. R. Lea

doi:10.1103/PhysRev.158.49

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Velocity Distribution of Metastable H Atoms Produced by Dissociative Excitation of $H_{2}$

M. Leventhal, R. T. Robiscoe^*, and K. R. Lea

Department of Physics, Yale University, New Haven, Connecticut

^*Present address: Department of Physics, University of Michigan, Ann Arbor, Michigan.

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Phys. Rev. 158, 49 – Published 5 June, 1967

DOI: https://doi.org/10.1103/PhysRev.158.49

Abstract

The velocity spectrum of metastable $H (2 S)$ atoms produced by electron bombardment of $H_{2}$ has been measured by a time-of-flight technique. Two distinct groups of metastables have been detected. The slower atoms are interpreted as arising from transitions to attractive states just above the $H (1 S) + H (2 S)$ dissociation limit. The faster atoms are thought to arise from transitions to doubly excited repulsive states which have not previously been detected.

References (29)

R. T. Robiscoe and B. L. Cosens, Phys. Rev. Letters 17, 69 (1966)
W. E. Lamb, Jr., and R. C. Retherford, Phys. Rev. 79, 549 (1950)
B. L. Donnally, T. Clapp, W. Sawyer, and M. Schultz, Phys. Rev. Letters 12, 502 (1964)
M. Leventhal, W. E. Lamb, Jr., K. R. Lea, S. L. Kaufman, and D. L. Mader, Bull. Am. Phys. Soc. 10, 458 (1965)
S. J. B. Corrigan, J. Chem. Phys. 43, 4381 (1965)
E. R. Williams, J. V. Martinez, and G. H. Dunn, Bull. Am. Phys. Soc. 12, 233 (1967)
S. P. Khare, Phys. Rev. 149, 33 (1966)
J. M. Harriman, Ph.D. thesis, Stanford University, Stanford, California, 1956 (unpublished)
J. Gerhauser and H. S. Taylor, J. Chem. Phys. 42, 3621 (1965)
J. C. Browne, J. Chem. Phys. 40, 43 (1964)
E. U. Condon, Amer. J. Phys. 15, 365 (1947)
J. G. Winans and E. C. G. Stueckelberg, Proc. Natl. Acad. Sci. 14, 867 (1928)
G. Herzberg, Spectra of Diatomic Molecules (D. Van Nostrand Company, Inc., Princeton, New Jersey, 1950), 2nd ed., p. 501
G. H. Dunn and L. J. Kieffer, Phys. Rev. 132, 2109 (1963)
R. S. Freund and W. Klemperer, Bull. Am. Phys. Soc. 11, 196 (1966)
W. L. Fite, R. T. Brackmann, D. G. Hummer, and R. F. Stebbings, Phys. Rev. 116, 363 (1959)
L. P. Smith and P. L. Hartman, J. Appl. Phys. 11, 220 (1940)
L. R. Wilcox and W. E. Lamb, Jr., Phys. Rev. 119, 1915 (1960)
E. M. Purcell, Astrophys. J. 116, 457 (1952)
D. P. Stevenson [J. Amer. Chem. Soc. 82, 5961 (1960)]
Omitted endnote
G. Herzberg and A. Monfils, J. Mol. Spectry. 5, 482 (1960)
G. W. King and J. H. Van Vleck, Phys. Rev. 55, 1165 (1939)
E. R. Davidson private communication J. Chem. Phys. 43, 834 (1965)
Fite ([16])
Omitted endnote
G. H. Dunn, Phys. Rev. Letters 8, 62 (1962)
D. R. Bates, K. Ledsham, and A. L. Stewart, Phil. Trans. Roy. Soc. (London) A246, 215 (1953)
M. E. Rudd [Phys. Rev. Letters 15, 580 (1965)]

[c1] R. T. Robiscoe and B. L. Cosens, Phys. Rev. Letters 17, 69 (1966)

[c2] W. E. Lamb, Jr., and R. C. Retherford, Phys. Rev. 79, 549 (1950)

[c3] B. L. Donnally, T. Clapp, W. Sawyer, and M. Schultz, Phys. Rev. Letters 12, 502 (1964)

[c4] M. Leventhal, W. E. Lamb, Jr., K. R. Lea, S. L. Kaufman, and D. L. Mader, Bull. Am. Phys. Soc. 10, 458 (1965)

[c5] S. J. B. Corrigan, J. Chem. Phys. 43, 4381 (1965)

[c6] E. R. Williams, J. V. Martinez, and G. H. Dunn, Bull. Am. Phys. Soc. 12, 233 (1967)

[c7] S. P. Khare, Phys. Rev. 149, 33 (1966)

[c8] J. M. Harriman, Ph.D. thesis, Stanford University, Stanford, California, 1956 (unpublished)

[c9] J. Gerhauser and H. S. Taylor, J. Chem. Phys. 42, 3621 (1965)

[c10] J. C. Browne, J. Chem. Phys. 40, 43 (1964)

[c11] E. U. Condon, Amer. J. Phys. 15, 365 (1947)

[c12] J. G. Winans and E. C. G. Stueckelberg, Proc. Natl. Acad. Sci. 14, 867 (1928)

[c13] G. Herzberg, Spectra of Diatomic Molecules (D. Van Nostrand Company, Inc., Princeton, New Jersey, 1950), 2nd ed., p. 501

[c14] G. H. Dunn and L. J. Kieffer, Phys. Rev. 132, 2109 (1963)

[c15] R. S. Freund and W. Klemperer, Bull. Am. Phys. Soc. 11, 196 (1966)

[c16] W. L. Fite, R. T. Brackmann, D. G. Hummer, and R. F. Stebbings, Phys. Rev. 116, 363 (1959)

[c17] L. P. Smith and P. L. Hartman, J. Appl. Phys. 11, 220 (1940)

[c18] L. R. Wilcox and W. E. Lamb, Jr., Phys. Rev. 119, 1915 (1960)

[c19] E. M. Purcell, Astrophys. J. 116, 457 (1952)

[c20] D. P. Stevenson [J. Amer. Chem. Soc. 82, 5961 (1960)]

[c21] Omitted endnote

[c22] G. Herzberg and A. Monfils, J. Mol. Spectry. 5, 482 (1960)

[c23] G. W. King and J. H. Van Vleck, Phys. Rev. 55, 1165 (1939)

[c24] E. R. Davidson private communication J. Chem. Phys. 43, 834 (1965)

[c25] Fite ([16])

[c26] Omitted endnote

[c27] G. H. Dunn, Phys. Rev. Letters 8, 62 (1962)

[c28] D. R. Bates, K. Ledsham, and A. L. Stewart, Phil. Trans. Roy. Soc. (London) A246, 215 (1953)

[c29] M. E. Rudd [Phys. Rev. Letters 15, 580 (1965)]

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Velocity Distribution of Metastable H Atoms Produced by Dissociative Excitation of $H_{2}$

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Velocity Distribution of Metastable H Atoms Produced by Dissociative Excitation of H2

Abstract

References (29)

Velocity Distribution of Metastable H Atoms Produced by Dissociative Excitation of $H_{2}$