Abstract

<p>The refractivity of helium computed from experimental measurements made at 15 different wavelengths by use of a corner-reflector Michelson interferometer, and computed from recent theoretical values of oscillator strength at 26 different wavelengths, is reported. The experimental measurements range from 4801 to 20586 Å. The absolute refractivity at 760 torr, 0°C, 5462.258 Å is 3.4950×10<sup>-5</sup>. A dispersion formula describing the data is (<i>n</i>-1)×10<sup>5</sup> = 1470.091/(423.98-σ<sup>2</sup>).</p><p>Other dispersion formulas are discussed. The experimental and theoretical computations are compared with the experimental and theoretical work of various authors. The comparison includes computations of effective F values, absorption wavelength, dielectric constant, molecular polarizability, and Verdet constant.</p>

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E. R. Peck, B. N. Khanna, and N. C. Anderholm, J. Opt. Soc. Ami. 52, 536 (1962).

Branson, B. H.

B. H. Branson and A. Dalgarno, Proc. Phys. Soc. (London) 66, 911 (1953).

Buckley, F.

A. A. Maryott and F. Buckley, Table of Dielectric Constants and Electric Dipole Moments of Substances in the Gaseous State, NBS Circ. 537 (U. S. Government Printing Office, Washington, D. C., 1953), p. 3.

Burton, W.

W. Burton, Proc. Roy. Soc. (London) 80, 390 (1908).

Chan, Y. M.

Y. M. Chan and A. Dalgarno, Proc. Phys. Soc. (London) 85, 227 (1965).

Chung, D. T.

D. T. Chung and R. P. Hurst, Phys. Rev. 152, 35 (1966).

Cuthbertson, C.

C. Cuthbertson and M. Cuthbertson, Proc. Roy. Soc. (London) 80, 411 (1908).

C. Cuthbertson and M. Cuthbertson, Proc. Roy. Soc. (London) 84, 13 (1910).

C. Cuthbertson and M. Cuthbertson, Proc. Roy. Soc. (London) 135, 40 (1932).

Cuthbertson, M.

C. Cuthbertson and M. Cuthbertson, Proc. Roy. Soc. (London) 135, 40 (1932).

C. Cuthbertson and M. Cuthbertson, Proc. Roy. Soc. (London) 84, 13 (1910).

C. Cuthbertson and M. Cuthbertson, Proc. Roy. Soc. (London) 80, 411 (1908).

Dalgarno, A.

A. Dalgarno and A. L. Stewart, Proc. Phys. Soc. (London) 76, 49 (1960).

Y. M. Chan and A. Dalgarno, Proc. Phys. Soc. (London) 85, 227 (1965).

A. Dalgarno and N. Lynn, Proc. Phys. Soc. (London) 70, 802 (1957).

B. H. Branson and A. Dalgarno, Proc. Phys. Soc. (London) 66, 911 (1953).

A. Dalgarno and A. E. Kingston, Proc. Phys. Soc. (London) 259A, 424 (1960).

Epstein, S. T.

B. Musulin and S. T. Epstein, Phys. Rev. 136, 966 (1964).

Fisher, D. J.

E. R. Peck and D. J. Fisher, J. Opt. Soc. Am. 54, 1362 (1964).

Gentili, K. L.

K. L. Gentili, M.S. thesis, University of Idaho (1966).

Glennon, B. M.

W. L. Wiese, M. W. Smith, and B. M. Glennon, Atomic Transition Probabilities, NBS Natl. Std. Ref. Data System 4, Vol. 1, (U. S. Government Printing Office, Washington, D. C., 1953), p. 11.

Hurst, R. P.

D. T. Chung and R. P. Hurst, Phys. Rev. 152, 35 (1966).

Ingersoll, L. R.

L. R. Ingersoll and D. H. Liebenberg, J. Opt. Soc. Am. 46, 538 (1956).

Karplus, M.

M. Karplus and J. J. Kolker, J. Chem. Phys. 39, 2997 (1963).

Khanna, B. N.

E. R. Peck and B. N. Khanna, J. Opt. Soc. Am. 52, 416 (1962).

E. R. Peck, B. N. Khanna, and N. C. Anderholm, J. Opt. Soc. Ami. 52, 536 (1962).

E. R. Peck and B. N. Khanna, J. Opt. Soc. Am. 56, 1059 (1966).

Kingston, A. E.

A. Dalgarno and A. E. Kingston, Proc. Phys. Soc. (London) 259A, 424 (1960).

Koch, J.

J. Koch, Ark. Mat. Astr. Fys. 9, 1 (1913).

Kolker, J. J.

M. Karplus and J. J. Kolker, J. Chem. Phys. 39, 2997 (1963).

Korwin, J

J Korwin, Z. Physik 91, 1 (1934).

Levinger, J. S.

R. Migneron and J. S. Levinger, Phys. Rev. 139, A647 (1965).

Liebenberg, D. H.

L. R. Ingersoll and D. H. Liebenberg, J. Opt. Soc. Am. 46, 538 (1956).

Lynn, N.

A. Dalgarno and N. Lynn, Proc. Phys. Soc. (London) 70, 802 (1957).

Maryott, A. A.

A. A. Maryott and F. Buckley, Table of Dielectric Constants and Electric Dipole Moments of Substances in the Gaseous State, NBS Circ. 537 (U. S. Government Printing Office, Washington, D. C., 1953), p. 3.

Migneron, R.

R. Migneron and J. S. Levinger, Phys. Rev. 139, A647 (1965).

Musulin, B.

B. Musulin and S. T. Epstein, Phys. Rev. 136, 966 (1964).

Obetz, S. W.

E. R. Peck and S. W. Obetz, J. Opt. Soc. Am. 43, 505 (1953).

Peck, E. R.

E. R. Peck and S. W. Obetz, J. Opt. Soc. Am. 43, 505 (1953).

E. R. Peck and B. N. Khanna, J. Opt. Soc. Am. 52, 416 (1962).

E. R. Peck and D. J. Fisher, J. Opt. Soc. Am. 54, 1362 (1964).

D. J. Schlueter and E. R. Peck, J. Opt. Soc. Am. 48, 313 (1958).

E. R. Peck, J. Opt. Soc. Am. 45, 795 (1955).

E. R. Peck and B. N. Khanna, J. Opt. Soc. Am. 56, 1059 (1966).

E. R. Peck, B. N. Khanna, and N. C. Anderholm, J. Opt. Soc. Ami. 52, 536 (1962).

Ramsay, W.

W. Ramsay and M. W. Travers, Proc. Roy. Soc. (London) 67, 329 (1901).

Report, Commission 14

Commission 14 Report, Trans. Intern. Astron. Un. 9, 201 (1957).

Schlueter, D. J.

D. J. Schlueter and E. R. Peck, J. Opt. Soc. Am. 48, 313 (1958).

Smith, M. W.

W. L. Wiese, M. W. Smith, and B. M. Glennon, Atomic Transition Probabilities, NBS Natl. Std. Ref. Data System 4, Vol. 1, (U. S. Government Printing Office, Washington, D. C., 1953), p. 11.

Stewart, A. L.

A. L. Stewart and T. G. Webb, Proc. Phys. Soc. (London) 82, 532 (1963).

A. Dalgarno and A. L. Stewart, Proc. Phys. Soc. (London) 76, 49 (1960).

Strutt, John W.

John W. Strutt, Lord Rayleigh, Proc. Roy. Soc. (London) 59, 198 (1896).

Travers, M. W.

W. Ramsay and M. W. Travers, Proc. Roy. Soc. (London) 67, 329 (1901).

Vinti, J. P.

J. P. Vinti, Phys. Rev. 42, 632 (1932).

Webb, T. G.

A. L. Stewart and T. G. Webb, Proc. Phys. Soc. (London) 82, 532 (1963).

Wheeler, J. A.

J. A. Wheeler, Phys. Rev. 43, 258 (1933).

White, D.

D. White, J. Phys. Chem. 64, 1607 (1960).

Wiese, W. L.

W. L. Wiese, M. W. Smith, and B. M. Glennon, Atomic Transition Probabilities, NBS Natl. Std. Ref. Data System 4, Vol. 1, (U. S. Government Printing Office, Washington, D. C., 1953), p. 11.

Other

John W. Strutt, Lord Rayleigh, Proc. Roy. Soc. (London) 59, 198 (1896).

W. Ramsay and M. W. Travers, Proc. Roy. Soc. (London) 67, 329 (1901).

W. Burton, Proc. Roy. Soc. (London) 80, 390 (1908).

C. Cuthbertson and M. Cuthbertson, Proc. Roy. Soc. (London) 80, 411 (1908).

C. Cuthbertson and M. Cuthbertson, Proc. Roy. Soc. (London) 84, 13 (1910).

J. Koch, Ark. Mat. Astr. Fys. 9, 1 (1913).

C. Cuthbertson and M. Cuthbertson, Proc. Roy. Soc. (London) 135, 40 (1932).

D. J. Schlueter and E. R. Peck, J. Opt. Soc. Am. 48, 313 (1958).

E. R. Peck and B. N. Khanna, J. Opt. Soc. Am. 52, 416 (1962).

E. R. Peck and D. J. Fisher, J. Opt. Soc. Am. 54, 1362 (1964).

E. R. Peck and S. W. Obetz, J. Opt. Soc. Am. 43, 505 (1953).

E. R. Peck, J. Opt. Soc. Am. 45, 795 (1955).

D. White, J. Phys. Chem. 64, 1607 (1960).

W. E. Forsythe, Ed., Smithsonian Physical Tables (Smithsonian Institution, Washington, D. C., 1959), p. 714.

K. L. Gentili, M.S. thesis, University of Idaho (1966).

E. R. Peck, B. N. Khanna, and N. C. Anderholm, J. Opt. Soc. Ami. 52, 536 (1962).

M. I. T. Spectroscopy Laboratory, Tables of Wavelength (John Wiley & Sons, Inc., New York, 1939).

Commission 14 Report, Trans. Intern. Astron. Un. 9, 201 (1957).

E. R. Peck and B. N. Khanna, J. Opt. Soc. Am. 56, 1059 (1966).

J. P. Vinti, Phys. Rev. 42, 632 (1932).

J. A. Wheeler, Phys. Rev. 43, 258 (1933).

J Korwin, Z. Physik 91, 1 (1934).

R. Migneron and J. S. Levinger, Phys. Rev. 139, A647 (1965).

M. Karplus and J. J. Kolker, J. Chem. Phys. 39, 2997 (1963).

B. Musulin and S. T. Epstein, Phys. Rev. 136, 966 (1964).

A. Dalgarno and N. Lynn, Proc. Phys. Soc. (London) 70, 802 (1957).

A. Dalgarno and A. E. Kingston, Proc. Phys. Soc. (London) 259A, 424 (1960).

Y. M. Chan and A. Dalgarno, Proc. Phys. Soc. (London) 85, 227 (1965).

W. L. Wiese, M. W. Smith, and B. M. Glennon, Atomic Transition Probabilities, NBS Natl. Std. Ref. Data System 4, Vol. 1, (U. S. Government Printing Office, Washington, D. C., 1953), p. 11.

A. Dalgarno and A. L. Stewart, Proc. Phys. Soc. (London) 76, 49 (1960).

B. H. Branson and A. Dalgarno, Proc. Phys. Soc. (London) 66, 911 (1953).

A. L. Stewart and T. G. Webb, Proc. Phys. Soc. (London) 82, 532 (1963).

D. T. Chung and R. P. Hurst, Phys. Rev. 152, 35 (1966).

A. A. Maryott and F. Buckley, Table of Dielectric Constants and Electric Dipole Moments of Substances in the Gaseous State, NBS Circ. 537 (U. S. Government Printing Office, Washington, D. C., 1953), p. 3.

L. R. Ingersoll and D. H. Liebenberg, J. Opt. Soc. Am. 46, 538 (1956).

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