blazewicz_1988#
P. R. Blazewicz and J. C. Miller, “Nonlinear optical processes in xenon and krypton studied by two-color multiphoton ionization”, Phys. Rev. A 38, 2863 (1988)
Source record · Catalogue · Review register
Source kind: measurement
Recorded technique: Two XeCl-pumped dye lasers (10 ns) focused from opposite sides into a stainless-steel ionisation cell: laser one (about 1 mJ uv, about 5 x 10^8 W/cm2) three-photon resonant with Kr 5s[3/2]1 (370.6 nm) or Xe 6s’[1/2]1 (388.6 nm) and generating its third harmonic; laser two (about 10^9 W/cm2) tuned to the one-photon transitions to higher even-parity levels (Kr 6p, Xe 5f). Electrons collected on a biased wire (gated integrator); the vuv third harmonic detected by photoionising NO in a second cell behind a MgF2 window. Xe 5-25 Torr (25 Torr with 150 Torr of Ar), Kr 4 Torr (pp. 2864-2867).
Materials in structured entries: None recorded.
Dataset quantities: None recorded.
Contents: 0 datasets; 0 formulas.
Curation notes#
No datasets. Identity checked on the first page: Blazewicz and Miller, Phys. Rev. A 38 (No. 6, 15 September 1988), 2863-2870; PDF pages 1-8 = journal pp. 2863-2870.
WHAT IT SHOWS (qualitative). At the three-photon J = 1 resonances (Kr 5s[3/2]1, Xe 6s’[1/2]1) the third harmonic generated to the blue of the resonance (Delta k < 0) cancels the three-photon excitation (one- and three-photon paths interfere); the upper levels are then reached mainly by one third-harmonic photon plus one laser-two photon, which favours the J = 2 levels two-photon-allowed from the ground state (Xe 5f[5/2]2 and 5f[3/2]2, Figs. 6-11), and by dissociation of collision complexes (‘At 1 Torr, approximately 10 % of the molecules are best represented as such collision complexes’ within the 10 ns pulse, p. 2864). Coupling to the four-photon level by laser two changes the third-harmonic phase matching, Delta k = Delta k0(delta1) / [1 - |Omega12|^2 / delta1 (delta2 + i Gamma2)] (p. 2870, after Payne and Garrett, unpublished): ionisation peaks turn into dips near optimum phase matching, and third-harmonic generation is enabled on the red side.
WAVELENGTHS. The printed 370.6 nm (Kr 5s[3/2]1; Fig. 4 caption 370.7 nm) and 388.6 nm (Xe 6s’[1/2]1) are air wavelengths: NIST (TC-983 levels) gives 3/80916.768 cm^-1 = 370.75 nm and 3/77185.041 cm^-1 = 388.68 nm in vacuum, 370.65 and 388.57 nm in air. Fig. 10’s caption puts laser one ‘0.5 A’ to the red of 6s’, the text ‘0.05 nm’ (the same).
NOT TAKEN (no quantity): everything. The ion and third-harmonic yields are spectra in arbitrary units, in scanned (raster) figures; the paper prints no cross section, transition strength, Rabi frequency, n2 or chi(3) value. For OEP 6, Q2: the paper has no krypton two-photon ionisation data at all (no table, no vector or raster figure of a cross section). For OEP 8: nothing bears on the 6p[1/2]0 strength; the cancellation it shows needs a one-photon path to the resonant level, which the even-parity two-photon levels lack.
Register: TC-1000.
Recorded bibliographic identity status: VALIDATED_WITH_WARNINGS. This concerns identification of the source; it does not establish the scientific correctness of its contents.
Datasets#
No datasets are recorded.
Formulas#
No formulas are recorded.
Corrections#
No dataset errata are recorded in this source record.
Formula corrections, where recorded, appear with their formulas above. Curation notes may also discuss corrections or unresolved interpretation. Consult the review register for the checks and decisions.