Výsledky vyhledávání

Ultrafast OH production in clusters containing N2O and HI

Autor: P. I. Ionov, Curt Wittig, S. I. Ionov

Publikováno v: The Journal of Chemical Physics. 107:9457-9463

The geometrical arrangement of reagents is an important factor influencing chemical reactions in condensed phases and molecular clusters. In the present study, OH buildup times have been recorded upon photolysis of (N2O)m(HI)n clusters in order to el

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::1b87cad52365a29b1cd704fb6aacaab0
https://doi.org/10.1063/1.475242

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An experimental investigation of the effect of rotation on the rate of unimolecular decomposition of NO2

Autor: I. Bezel, S. I. Ionov, P. I. Ionov, Curt Wittig

Publikováno v: Chemical Physics Letters. 272:257-264

The effect of rotational excitation on the rate of unimolecular decomposition has been examined for a benchmark system. NO 2 molecules having specific excitations were selected by pumping rotational components of the (1,0,1) ← (0,0,0) combination b

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::e14b6b2becd529b5b455f873a54b79f2
https://doi.org/10.1016/s0009-2614(97)88018-9

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The density of reactive levels in NO2 unimolecular decomposition

Autor: S. I. Ionov, Curt Wittig, R. A. Beaudet, H. F. Davis, L. Valachovic, K. Mikhaylichenko

Publikováno v: The Journal of Chemical Physics. 101:4809-4818

Laser induced fluorescence spectra of expansion‐cooled NO2/Ne samples (1 and 2 K) are reported for transitions that originate from the lowest rovibronic levels and terminate on levels near D0. At 1 K, nearly all transitions originate from N‘=0. W

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::e3461b0626083dbe7d04adc5c63aa85b
https://doi.org/10.1063/1.467403

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Picosecond resolution measurements of NO3 unimolecular decomposition. The NO + O2 channel

Autor: H. F. Davis, P. I. Ionov, S. I. Ionov, Curt Wittig

Publikováno v: Chemical Physics Letters. 215:214-220

The title reaction has been studied with picosecond resolution at energies near threshold. Expansion cooled nitrate radicals were photoexcited to admixtures of 2 E′ and ground state 2 A′ 2 levels, ensuring a unimolecular decomposition mechanism.

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::b72819d958ff8abdb199d08f3d2be3a6
https://doi.org/10.1016/0009-2614(93)89291-o

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Subpicosecond resolution studies of the H+CO2→CO+OH reaction photoinitiated in CO2–HI complexes

Autor: Curt Wittig, G. A. Brucker, C. Jaques, L. Valachovic, S. I. Ionov

Publikováno v: The Journal of Chemical Physics. 99:6553-6561

Time resolved studies of the title reaction have been carried out by photodissociating the HI moiety within weakly bound CO2–HI complexes. The HOCO° intermediate decomposes via a unimolecular decomposition mechanism, and the emerging hydroxyl radi

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::48b14ed97694f7ef2c903daca7dd5ae2
https://doi.org/10.1063/1.465847

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Probing the NO2→NO+O transition state via time resolved unimolecular decomposition

Autor: Curt Wittig, Y. Chen, C. Jaques, G. A. Brucker, S. I. Ionov

Publikováno v: The Journal of Chemical Physics. 99:3420-3435

Time resolved, subpicosecond resolution measurements of photoinitiated NO2 unimolecular decomposition rates are reported for expansion cooled and room temperature samples. The molecules are excited by 375–402 nm tunable subpicosecond pulses having

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::57a8c2a5c401f7014a4d19a32dfeea44
https://doi.org/10.1063/1.465152

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Photoinitiated processes in complexes: subpicosecond studies of CO2—Hl and stereospecificity in Ar—HX

Autor: J. Segall, E. Böhmer, Y. Wen, C. Jaques, L. Valachovic, S. I. Ionov, Curt Wittig

Publikováno v: J. Chem. Soc., Faraday Trans.. 89:1419-1425

Build-up times for the OH product of photoinduced reactions in CO2—HI complexes were measured for the photolysis wavelength range 235–263 nm by using the subpicosecond resolution pump–probe method pioneered by Zewail and co-workers. There is re

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::f483c3dccae478feacbc16e5a1ac72ff
https://doi.org/10.1039/ft9938901419

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Megahertz-repetition-rate Nd:glass fiber laser

Autor: R. A. Reeder, S. I. Ionov

Publikováno v: Applied optics. 35(15)

Stable trains of 100–200-ns-long pulses are obtained at 0.46–1.06-MHz repetition rates in a Nd:glass fiber laser by driving large-amplitude relaxation oscillations at or below their resonance. Numerical simulations agree qualitatively with tempor

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ef57dbe870af0e6604f126b33fa70f19
https://pubmed.ncbi.nlm.nih.gov/21085399

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Subpicosecond OH production from photoexcited CO2–HI complexes

Autor: C. Jaques, Curt Wittig, S. I. Ionov, L. Valachovic, G. A. Brucker

Publikováno v: The Journal of Chemical Physics. 97:9486-9489

The subpicosecond resolution pump–probe method is used to obtain rates for OH production from CO2–HI complexes photoexcited in the HI ultraviolet continuum. Production lifetimes between 300 and 600 fs are reported for wavelengths between 255 and

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::59aca0d6f44fe0d243eea74b976bfa0b
https://doi.org/10.1063/1.463275

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