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Long‐Lived Collision Complexes in Molecular Beam Scattering Experiments
1.(a) D. O. Ham and J. L. Kinsey, J. Chem. Phys. 48, 939 (1968);
1.D. O. Ham, J. L. Kinsey, and F. S. Klein, Discussions Faraday Soc. 44, 174 (1967).
1.(b) W. B. Miller, S. A. Safron, and D. R. Herschbach, Discussions Faraday Soc. 44, 108 (1967)., Discuss. Faraday Soc.
1.(c) D. Beck and H. Forster, Proc. Intern. Conf. Phys. Electron. At. Collisions, 6th, 634 (1969).
1.(d) J. H. Birely and R. J. McNeal, J. Chem. Phys. 47, 860 (1967), reported negative results for potassium scattered by benzene;
1.(e) Y. T. Lee, J. McDonald, P. R. LeBretton, and D. R. Herschbach, J. Chem. Phys. 49, 2447 (1968)., J. Chem. Phys.
2.C. E. H. Bawn and A. G. Evans, Trans. Faraday Soc. 33, 1571 (1937).
3.JANAF Tables of Thermochemical Data, edited by D. R. Stull (Dow, Midland, Mich., 1969).
4.L. Brewer and E. Brackett, Chem. Rev. 61, 425 (1961).
5.L. Brewer and M. S. Chandrasekhariah, Univ. of Calif. Lawrence Rad. Lab. Rept. UCRL‐8713, 1959.
6.J. L. Kinsey, Rev. Sci. Instr. 37, 61 (1966).
7.Beams of produced large increases in positive ion currents from the surface ionization detector. A check made in another apparatus showed that the ions were mostly with a small amount of Apparently the evaporation of volatile oxides formed by reaction of the beam with the wire’s surface uncovers layers of alkali metal impurities that are then ionized. Other groups have made similar observations: (a) H. F. Winters et al., J. Appl. Phys. 34, 1810 (1963);
7.(b) P. O. Schissel and O. C. Trulson, J. Chem. Phys. 43, 737 (1965);
7.(c) B. McCarroll, J. Chem. Phys. 46, 863 (1966)., J. Chem. Phys.
8.(a) T. T. Warnock and R. B. Bernstein, J. Chem. Phys. 49, 1878 (1968);
8.T. T. Warnock and R. B. Bernstein, 51, 4682 (1969), , J. Chem. Phys.
8.Erratum; (b) R. K. B. Helbing, J. Chem. Phys. 48, 472 (1968); , J. Chem. Phys.
8.(c) F. A. Morse and R. B. Bernstein, J. Chem. Phys. 37, 2019 (1962); , J. Chem. Phys.
8.(d) S. Datz, D. R. Herschbach, and E. H. Taylor, J. Chem. Phys. 35, 1549 (1961)., J. Chem. Phys.
9.See Table I of Ref. 8 (a), p. 1879. Our corresponds to their Our G corresponds to their evaluated at
10.C. F. Gauss, “Theory of Least Squares (1821),” English Translation by H. F. Trotter, Princeton Univ., Stat. Tech. Res. Group, Technical Report No. 5.
11.D. Secrest and A. H. Stroud, Gaussian Quadrature Formulae (Prentice‐Hall, New York, 1966).
12.J. L. Kinsey, “Tables for Gaussian Quadrature of ,” Wise. Theoret. Chem. Inst. Tech. Rept. WIS‐TCI‐386, 1970.
13.J. H. Ahlberg, E. N. Wilson, and J. L. Walsh, The Theory of Splines and Their Applications (Academic, New York, 1968).
14.E. A. Mason, J. Chem. Phys. 26, 667 (1957).
15.R. R. Herm, Ph.D. thesis, Harvard University, Cambridge, Mass., 1966.
16.R. J. McNeal, R. A. Bernheim, R. Bersohn, and M. Dorfman, J. Chem. Phys. 40, 1678 (1964).
17.R. D. Levine and B. R. Johnson, Chem. Phys. Letters 4, 365 (1969).
18.G. A. Fisk and D. R. Herschbach (private communication).
19.P. Pechukas, J. C. Light, and C. Rankin, J. Chem. Phys. 44, 794 (1966), and other papers referred to therein.
20.C. H. Townes and A. L. Schawlow, Microwave Spectroscopy (McGraw‐Hill, New York, 1955). The actual rotational constants are This gives an asymmetry parameter ( for a prolate symmetric rotor).
21.E. W. Rothe and R. B. Bernstein, J. Chem. Phys. 31, 1619 (1959).
22.J. E. Blamont and T. M. Donahue, J. Geophys. Res. 69, 4114 (1964).
23.See, for example, the review by D. R. Herschbach in Advan. Chem. Phys. 10, 332 (1966).
24.This effect is most impressively shown in Professor M. Karplus’ motion picture of trajectories for a potential with an unrealistically deep well in the vicinity of the “barrier” region (private communication).
25.R. Bersohn, Comments At. Mol. Phys. 1, 84 (1969).
26.L. M. Raff and M. Karplus, J. Chem. Phys. 44, 1212 (1966). These authors found complex trajectories for one of their potential surfaces, which represented a superposition of covalent and ionic structures. Although this surface had no deeper minimum than the others they used, the dominating Coulombic term in the potential used for the ionic interaction probably gives rise to a large density of bound states near the dissociation limit of the “triatomic” system.
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