Full text loading...
No data available.
Please log in to see this content.
You have no subscription access to this content.
No metrics data to plot.
The attempt to load metrics for this article has failed.
The attempt to plot a graph for these metrics has failed.
Absolute Transition Probabilities in Ultraviolet Molecular Spectra
1.G. M. Lawrence, J. Quant. Spectry. Radiative Transfer 5, 359 (1965).
2.J. E. Hesser and K. Dressler, J. Chem. Phys. 45, 3149 (1966).
3.(a) J. E. Hesser, Ph.D. dissertation, University Microfilms, Ann Arbor, Mich. (1966).
3.(b) J. E. Hesser and K. Dressler, J. Chem. Phys. 47, 3443 (1967).
4.G. M. Lawrence and B. D. Savage, Phys. Rev. 141, 67 (1966).
5.B. D. Savage and G. M. Lawrence, Astrophys. J. 146, 940 (1966).
6.A. circuit diagram of the sideband generator may be found in Ref. 3(a).
7.J. E. Hesser and K. Dressler, Astrophys. J. 142, 389 (1965).
8.See Eq. (6) of Ref. 4.
9.C. W. Allen, Astrophysical Quantities (Athlone Press, London, 1963), 2nd ed.
10.R. S. Mulliken, J. Chem. Phys. 7, 14 (1939).
11.G. Herzberg, Molecular Spectra and Molecular Structure I. Spectra of Diatomic Molecules (D. Van Nostrand Co., Inc., Princeton, N.J., 1950), 2nd ed. p. 200.
12.P. A. Fraser, Can. J. Phys. 32, 515 (1954).
13.Reference 11, p. 203.
14.R. W. Nicholls, J. Quant. Spectry. Radiative Transfer 2, 433 (1962);
14.for Franck‐Condon factors see also D. J. Jain and R. C. Sahni, J. Quant. Spectry. Radiative Transfer 6, 705 (1966)., J. Quant. Spectrosc. Radiat. Transf.
15.M. E. Wacks, J. Chem. Phys. 41, 930 (1964).
16.G. B. Field, W. B. Somerville, and K. Dressler, Ann. Rev. Astron. Astrophy. 4, 207 (1966).
17.T. Namioka, J. Chem. Phys. 43, 1636 (1965).
18.R. W. Nicholls, Astrophys. J. 141, 819 (1965).
19.J. Geiger and M. Topschowsky, Z. Naturforsch. 21a, 626 (1966).
20.P. M. Solomon (private communication).
21.R. J. Spindler, (a) NASA Report AVSSD‐0287‐66‐RR, 1966;
21.(b) Morse‐curve Franck‐Condon factors (private communcation).
22.J. Geiger, Z. Physik. 181, 413 (1964).
23.R. W. Nicholls, J. Res. Natl. Bur. Std. 65A, 451 (1961).
24.R. W. Nicholls, Can. J. Phys. 40, 1772 (1962).
25.R. P. Schwenker, J. Chem. Phys. 42, 1895 (1965).
26.G. M. Lawrence, D. L. Mickey, and K. Dressler, J. Chem. Phys. 48, 1989 (1968);
26.cf. also G. M. Lawrence, D. L. Mickey, and K. Dressler, Astron. J. 71, 813 (1966).
27.R. J. Spindler and T. Wentink, Jr. (private communication).
28.L. Goldberg, W. H. Parkinson, and E. M. Reeves, Astrophys. J. 141, 1293 (1965).
29.T. P. Stecher and D. A. Williams, Astrophys. J. 146, 88 (1966).
30.V. D. Meyer, A. Skerbele, and E. N. Lassettre, J. Chem. Phys. 43, 805 (1965).
31.It should be noted that in principle the phase data could be attributed to a cascade with values of τ and T reversed, i.e., and but this would require the very large value of i.e., for almost each photon in the A‐X transition there would have to be a photon in the upper cascade. A signal of such intensity in either the B‐A, C‐A or any hitherto unobserved ultraviolet system would have been detectable.
32.J. P. Simmons (private communication with K. Dressler).
33.P. H. Krupenie The Band Spectrum of Carbon Monoxide (National Bureau of Standards NSRDS‐NBS 5, Washington, D.C., 1966), Table 54.
34.J. C. Rich, Ph.D. dissertation, Harvard University, 1966.
35.M. Gaillard and J. E. Hesser, Astrophys. J. (to be published).
36.H. Anton, Ann. Physik 16, 18 (1965).
37.Weak but apparently unblended emissions were observed at the wavelengths of the BF band at 1490‐Å, and bands at 1415‐Å in the electron excitation spectrum of gas. Both emissions were measured with the results: and and As I was unable to secure higher‐resolution spectra of these very weak transitions, the assignment to molecular species rather than weak atomic features, perhaps even impurities in the gas, cannot be positively made.
38.R. W. Nicholls, J. Res. Natl. Bur. Std. 68A, 535 (1964).
39.G. W. Bethke, J. Chem. Phys. 31, 662 (1959).
40.H. A. Ory, J. Chem. Phys. 40, 562 (1964).
41.Preliminary data were obtained for the NO C‐state level from the 1910‐Å (0,0) band excited in NOCl which yielded and This lifetime yields a Σ f value of 0.07, a factor of 4 larger than Ory’40 interpretation of Bethke’s39 data; however, the interpretation of the phase shifts is uncertain because of the large value of β and the spread in the experimental phase shifts. Similarly, some data were obtained on the 1550‐Å band of NO, representing the F‐X bands; however, because of the likelihood of spectral overlap of emissions with different lifetimes, the interpretation of the data in terms of a single lifetime and a single cascading process is uncertain. The latter assumption provides nominal values of and Alternate interpretations in terms of spectral overlap without cascading are possible. Phase data taken during the course of this investigation on the (0,0) 2260‐Å band of the NO transition excited in NOCl have been reanalyzed in view of experience recently gained in this laboratory on lifetime measurements of much stronger emissions from relatively long‐lived states in Ne [J. E. Hesser (unpublished data)]
41.and CH [J. E. Hesser and B. L. Lutz, Phys. Rev. Let. 20, 363 (1968), Ref. 4, and unpublished material].
41.The NO A‐X data, obtained at the four lowest modulation frequencies, yield a lifetime of with no strong indication of the expected D‐A cascade. Excellent agreement exists between this lifetime value and that found by Jeunehomme [J. E. Hesser and B. L. Lutz, J. Chem. Phys. 45, 4433 (1966)],
42.T. L. Porter, D. E. Mann, and N. Acquista, J. Mol. Spectry. 16, 228 (1965).
43.I am particularly grateful to Dr. T. Wentink, Jr., for making a sample of this gas available to me.
44.C. W. Matthews, Proc. Intern. Symp. Mol. Structure Spectry. Columbus, Ohio, 1966, 1–9; no emission was observed in our source near the absorption wavelength of this new system (about 1680 Å).
45.J. A. Harrington, A. P. Modica, and D. R. Libby, J. Chem. Phys. 44, 3380;
45.and J. A. Harrington, A. P. Modica, and D. R. Libby, 45, 2720 (1966).
46.T. Wentink, Jr. and L. Isaacson, J. Chem. Phys. 46, 603 (1967).
47.R. P. Schwenker, J. Chem. Phys. 42, 2618 (1965).
48.H. Anton, Ann. Physik 18, 178 (1966).
49.T. C. James, J. Mol. Spectry. 20, 77 (1966).
50.P. H. Krupenie and W. Benesch, Proc. Intern. Symp. Mol. Struct. Spectry. Columbus, Ohio, 1966, Y‐3.
51.P. H. Krupenie (private communication, 1966);
51.see also D. J. Flinn, R. J. Spindler, S. Fifer, and M. Kelly, J. Quant. Spectry. Radiative Transfer 4, 271 (1964);
51.J. Drake (M.A. thesis, York University, 1967)
51.has systematically studied the validity of the R‐centroid approximation and has arrived at generally different conclusions than those found in Ref. 49 or 50 [R. W. Nicholls (private communication, 1967)].
Article metrics loading...