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Electron transfer in collisions between atomic ions and rare‐gas atoms for primary‐ion energies below 200 eV. II
1.W. B. Maier II, Phys. Rev. A 5, 1256 (1972). This paper is the companion work, I, to the present report.
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7.A. R. Lee and J. B. Hasted, Proc. Phys. Soc. 85, 673 (1965).
8.C. F. Giese and W. B. Maier II, J. Chem. Phys. 39, 739 (1963).
9.W. B. Maier II, J. Chem. Phys. 42, 1790 (1965).
10.G. P. Barnard, Modern Mass Spectrometry (Institute of Physics, London, 1953), p. 43 ff.
10.H. Hintenberger and L. A. König, Advances in Mass Spectrometry, edited by J. D. Waldron, (Pergamon, New York, 1959), p. 16.
11.D. Halliday, Introductory Nuclear Physics, 2nd ed. (Wiley, New York, 1957), p. 407.
12.In fact, the results of this investigation indicate that which would imply
13.W. B. Maier II, Transformations from Barycentric to Laboratory Coordinates for Two‐ and Three‐Body Scattering Events, Los Alamos Scientific Laboratory Report No. LA‐3972 (1969).
14.K was measured to be 1.67 for Reaction (1).
15.During a given set of measurements, fluctuates less than 0.01%.
16.Thus, for example, if there is a slight, apparent shift in the lower‐energy peak in Fig. 2 as E is increased, it is not large enough to be experimentally significant. The absolute uncertainty in v in Figs. 2–4 is see Sec. II. C.
17.The detected secondary ions may actually be scattered through fairly wide laboratory angles. These formulae for Q presuppose that In the absence of angular distributions, it isn’t possible to know just how much error results from this assumption.
18.P. J. Chantry, J. Chem. Phys. 55, 2746 (1971).
19.FWHM≡full width at half of the maximum in the distribution.
20.For example, new reaction channels can open up as is increased.
21.For convenience, the and states of the rare‐gas ions (except are called, collectively, “the ground state” here.
22.C. E. Moore, Atomic Energy Levels Vol. I, Nat’l. Bur. Stand. Circ. 467 (1949).
23.M. Barat, J. C. Brenot, D. Dhuicq, J. Pommier, V. Sidis, R. E. Olson, E. J. Shipsey, and J. C. Browne, J. Phys. B 9, 269 (1976).
24.B. Huber, Z. Phys. A 275, 95 (1975).
25.The scattering experiments of W. H. Cramer, J. Chem. Phys. 30, 641 (1959) were apparently not sensitive enough to see charge transfer in collisions of and with Ar and Ne, respectively.
26.H. Schlumbohm, AFCRL Report No. AFCRL‐6‐0236 (1969), translated from Z. Naturforsch. Teil A 23, 970 (1968).
26.Schlumbohm’s cross sections are based on the cross sections of D. T. Stewart [Proc. Phys. Soc. London 69, 437 (1956)]
26.and are thus low by a factor of 2–2.5. See R. F. Holland, Los Alamos Scientific Laboratory, Report No. LA‐3783, 1967 (unpublished). When Schlumbohm’s cross sections are compared with the present work they have been multiplied by 2.2.
27.M. Lipeles, R. Novick, and N. Tolk, Phys. Rev. Lett. 15, 815 (1965).
28.N. H. Tolk, C. W. White, S. H. Dworetsky, and L. A. Farrow, private communication, 1969.
29.D. W. Koopman, Phys. Rev. 154, 79 (1967).
30.G. Monnom, M. Eliot, J. Guidini, and F. P. G. Valkx, C. R. Acad Sci. Paris 281, 425 (1975).
31.J. B. H. Stedeford and J. B. Hasted, Proc. R. Soc. London Ser. A 227, 466 (1955).
32.Y. Kaneko, L. R. Megill, and J. B. Hasted, J. Chem. Phys. 45, 3741 (1966).
33.D. K. Bohme, M. M. Nakshbandi, P. P. Ong, and J. B. Hasted, Proceedings of the 7th International Conference on Ionization Phenomena Gases, Vienna, 1967 (North‐Holland, Amsterdam, 1967).
33.See also pp. 259 and 260 of J. B. Hasted, Adv. At. Mol. Phys. 4, 237 (1968);
33.in Fig. 9, two data points that are said to come from Ref. 30 could not be found there by this author.
34.Actually, the upper limit calculated from the “spurious” peak dropped by about a factor of 2 at very low energies. Some decrease is not unexpected, if this current is truly spurious.
35.See, however, the discussions in R. G. Kosmider and J. B. Hasted, J. Phys. B (to be published).
36.M. Henchman, Ion‐Molecule Reactions, edited by J. L. Franklin (Plenum, New York, 1972), Chap. 5, pp. 196 ff.
37.J. B. Hasted, Physics of Atomic Collisions (Butterworths, Washington, D.C., 1964), p. 420 ff.
38.D. K. Bohme, J. B. Hasted, and P. P. Ong, J. Phys. B 1, 879 (1968).
39.It is also true that the transfer of an electron from the neutral atom to the projectile ion need not necessarily take place when the colliding nuclei are close (Ref. 36), in which case the Langevin cross section cannot be correct; however, close approach does seem to occur in many of these reactions.
40.In fact, two unperturbed electronic molecular states of the same symmetry do not actually cross, but form two new electronic states, which may be perturbed if sufficiently high collision velocities are involved. The distinction between such pseudo crossings and actual crossings for potential energy curves for states of different symmetry is ignored here. See Ref. 2.
41.N. F. Mott and H. S. W. Massey, The Theory of Atomic Collisions, 3rd ed. (Oxford University, London, 1965), p. 662 ff.
42.Yu. P. Mordvinov and O. B. Firsov, Sov. Phys. JETP 12, 301 (1960).
43.D. R. Bates and D. S. F. Crothers, Proc. R. Soc. London Ser. A 315, 465 (1970).
44.D. R. Bates, Proc. R. Soc. London Ser. A 257, 22 (1960).
45.J. L. Magee, Discuss. Faraday Soc. 12, 33 (1952).
46.J. van den Bos, J. Chem. Phys. 52, 3254 (1970).
47.R. E. Olson, F. T. Smith, and E. Bauer, Appl. Opt. 10, 1848 (1971).
48.V. Sidis and H. Lefebvre‐Brion, J. Phys. B 4, 104 (1971).
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