Optical Dispersion

Korff, S. A.; Breit, G.

doi:10.1103/revmodphys.4.471

Cited by 139 publications

(33 citation statements)

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“…ntO no (1) where the Sn..a is a summation over the discrete part and an integration over the continuous part of the spectrum. Atomic units are used throughout unless otherwise stated.…”

Section: Theorymentioning

confidence: 99%

“…The cumbersome infinite summations over the whole spectrum in Eqs. (1) and (2) of second-order perturbation theory. The method we employ to circumvent these summations is to replace the true spectrum by a finite number of excitation frequencies and oscillator strengths as obtained from the equations of motion (EOM) 20 -22 method.…”

Section: Theorymentioning

confidence: 99%

“…Atomic and molecular polarizabilities (along with the anisotropy in the case of molecules) play a central role in the investigation of such important properties as the optical refractivity, 1 Faraday rotation, 2 Rayleigh scattering cross sections, 3 and van der Waals coefficients. 4 Experimental data on these atomic and molecular properties are far from satisfactory over a wide range of frequency values (e. g., in the vacuum uv).…”

Section: Introductionmentioning

confidence: 99%

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Dipole properties of atoms and molecules in the random phase approximation

Martin

1975

The Journal of Chemical Physics

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A random phase approximation (RP A) calculation and a direct sum over states is used to calculate second-order optical properties and van der Waals coefficients. A basis set expansion technique is used and no continuumlike functions are included in the basis. However, unlike other methods we do not force the basis functions to satisfy any sum-rule constraints but rather the formalism (RP A) is such that the Thomas-Reiche--Kuhn sum rule is satisfied exactly. Central attention is paid to the dynamic polarizability from which most of the other properties are derived. Application is made to helium and molecular hydrogen. In addition to the polarizability and van der Waals coefficients, results are given for the molecular anisotropy of H 2 , Rayleigh scattering cross sections, and Verdet constants as a function of frequency. Agreement with experiment and other theories is good. Other energy weighted sum rules are calculated and compare very well with previous estimates. The practicality of our method suggests its applications to larger molecular systems and other properties.

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“…ntO no (1) where the Sn..a is a summation over the discrete part and an integration over the continuous part of the spectrum. Atomic units are used throughout unless otherwise stated.…”

Section: Theorymentioning

confidence: 99%

Section: Theorymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Dipole properties of atoms and molecules in the random phase approximation

Martin

1975

The Journal of Chemical Physics

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“…е-\ 1 i. _ZL \ --дл · f k -(1 -Qь) (1) В этом уравнении j относится к нижнему, k -к верхнему уровню спектральной линии, Nj и Nk -число атомов в 1 см 3 на этих уровнях, gi и gk -статистические веса, ν*,· -частота этой линии и Akj -вероятность перехода. Отсюда, если дробь…”

Section: G-2 Punclassified

Дисперсия В Электрически Возбужденных Газах

Ladenburg¹

1934

Usp. Fiz. Nauk

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“…77 Serge Korff (1906Korff ( -1989 Serge Korff (figure 18) joined the NYU Physics Department in 1941 and remained an active member of it until his death in 1989. An early indication of his quality as a physicist is an extraordinary paper he published with Gregory Breit on optical dispersion in the Reviews of Modern Physics in 1932, 78 while he was a National Research Fellow at Mt. Wilson Observatory.…”

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confidence: 99%

History of the New York University Physics Department

Bederson

Stroke

2011

Phys. Perspect.

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We trace the history of physics at New York University after its founding in 1831, focusing especially on its relatively recent history, which can be divided into five periods: the Gregory Breit period from 1929 to 1934; the prewar period from 1935 to 1941; the wartime period from 1942 to 1945; the postwar period from around 1961 to 1973 when several semiautonomous physics departments were united into a single all-university department under a single head; and after 1973 when the University Heights campus was sold to New York City and its physics department joined the one at the Washington Square campus. For each of these periods we comment on the careers and work of prominent members of the physics faculty and on some of the outstanding graduate students who later went on to distinguished careers at NYU and elsewhere.

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Optical Dispersion

Cited by 139 publications

References 50 publications

Dipole properties of atoms and molecules in the random phase approximation

Dipole properties of atoms and molecules in the random phase approximation

Дисперсия В Электрически Возбужденных Газах

History of the New York University Physics Department

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