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  1. Artikel ; Online: Dissociative Recombination of K

    Eliyahu-Caspi, Gilead / Makov, Guy / Rosenwaks, Salman / Barmashenko, Boris D

    The journal of physical chemistry. A

    2022  Band 126, Heft 34, Seite(n) 5751–5760

    Abstract: Dissociative recombination (DR) of ... ...

    Abstract Dissociative recombination (DR) of K
    Sprache Englisch
    Erscheinungsdatum 2022-08-22
    Erscheinungsland United States
    Dokumenttyp Journal Article
    ISSN 1520-5215
    ISSN (online) 1520-5215
    DOI 10.1021/acs.jpca.2c05096
    Datenquelle MEDical Literature Analysis and Retrieval System OnLINE

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  2. Artikel ; Online: Multi-transverse mode operation of alkali vapor lasers: modeling and comparison with experiments.

    Auslender, Ilya / Barmashenko, Boris D / Rosenwaks, Salman

    Optics express

    2017  Band 25, Heft 17, Seite(n) 19767–19779

    Abstract: In high-power diode pumped alkali lasers with stable resonators the radius of the pump beam is usually larger than that of the fundamental laser mode and thus several high order transverse modes of the resonator can participate in the lasing. A simple ... ...

    Abstract In high-power diode pumped alkali lasers with stable resonators the radius of the pump beam is usually larger than that of the fundamental laser mode and thus several high order transverse modes of the resonator can participate in the lasing. A simple optical model of multi-transverse mode operation of alkali vapor lasers is reported. The model is based on calculations of the pump and laser beam intensities in the gain medium, where the laser beam intensity is a linear combination of the azimuthally-symmetric Laguerre-Gaussian modes. It was applied to Ti:Sapphire and diode pumped cesium vapor lasers. The model predicts that for low pump power only the fundamental lasing mode oscillates. However, for higher pump powers several transverse modes participate in oscillation. The number and intensities of the oscillating modes as a function of the pump beam power and radius were found. The model predicts linear dependence of the laser power on the pump power, the values of the former being in agreement with the experimental results obtained for diode pumped cesium laser [Electron. Lett.44, 582 (2008)]. The mode-matching efficiency for the multi-transverse mode lasing is ~0.8 - 0.85 which means that in this case almost complete overlap of the laser and pump beams takes place. The laser beam quality factorM
    Sprache Englisch
    Erscheinungsdatum 2017-08-21
    Erscheinungsland United States
    Dokumenttyp Journal Article
    ZDB-ID 1491859-6
    ISSN 1094-4087 ; 1094-4087
    ISSN (online) 1094-4087
    ISSN 1094-4087
    DOI 10.1364/OE.25.019767
    Datenquelle MEDical Literature Analysis and Retrieval System OnLINE

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  3. Buch ; Online: Vibrationally mediated photodissociation

    Rosenwaks, Salman

    2009  

    Abstract: The first book to cover the effect of vibrational pre-excitation on molecular dynamics, both in the gas phase and on surfaces, Vibrationally Mediated Photodissociation (VMP) deals with the influence of vibrational excitation of the ground electronic ... ...

    Verfasserangabe Salman Rosenwaks
    Abstract The first book to cover the effect of vibrational pre-excitation on molecular dynamics, both in the gas phase and on surfaces, Vibrationally Mediated Photodissociation (VMP) deals with the influence of vibrational excitation of the ground electronic state of a molecule on its dissociation following excitation of this state to a higher electronic state. Aimed at students and academics, this is the first book devoted to the effect of vibrational pre-excitation on molecular dynamics in the gas phase. In particular, it deals with the influence of this excitation on the dissociation of molecules (ie: on the branching ratio between the dissociation products and its dependence on the vibrational state being excited). The effect in the gas phase has been extensively studied, both theoretically and experimentally and encompasses diverse areas of chemical physics. This monograph presents the methodology of VMP, using state-of-the-art specific examples. Overviews of earlier works are included as well, to serve as a background for current research. Wherever appropriate, original works are quoted, including the original drawings. The contents include a brief review of theoretical and experimental methods relevant to VMP and specific examples. Also included are a bibliography, author and subject index. From the description of the motivation, the approach, the execution of the experiment and the analysis of the results of the specific examples, the reader will get a comprehensive understanding of the field. The book is aimed at senior undergraduate and graduate students of chemistry and physics. It serves as an introduction to VMP for beginners and as a literature guide to those acquainted with the subject but not necessarily working on VMP
    Schlagwörter Gas dynamics ; Molecular dynamics ; Photodissociation ; Surfaces (Physics) ; Vibration
    Sprache Englisch
    Umfang Online-Ressource (175 p), 71 b&w, ill
    Dokumenttyp Buch ; Online
    Anmerkung Ebook
    ISBN 1847558178 ; 9781847558176
    Datenquelle Bibliothek der Tierärztlichen Hochschule Hannover

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  4. Buch: Vibrationally mediated photodissociation

    Rosenwaks, Salman

    2009  

    Verfasserangabe Salman (Zamik) Rosenwaks
    Schlagwörter Gas dynamics ; Molecular dynamics ; Photodissociation ; Surfaces (Physics) ; Vibration
    Sprache Englisch
    Umfang XV, 204 S., 24cm
    Verlag Royal Soc. of Chemistry
    Erscheinungsort Cambridge
    Dokumenttyp Buch
    ISBN 0854041559 ; 9780854041558
    Datenquelle Katalog der Technische Informationsbibliothek Hannover

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  5. Buch ; Online: Vibrationally mediated photodissociation

    Rosenwaks, Salman

    2009  

    Abstract: The first book to cover the effect of vibrational pre-excitation on molecular dynamics, both in the gas phase and on surfaces, Vibrationally Mediated Photodissociation (VMP) deals with the influence of vibrational excitation of the ground electronic ... ...

    Verfasserangabe Salman Rosenwaks
    Abstract The first book to cover the effect of vibrational pre-excitation on molecular dynamics, both in the gas phase and on surfaces, Vibrationally Mediated Photodissociation (VMP) deals with the influence of vibrational excitation of the ground electronic state of a molecule on its dissociation following excitation of this state to a higher electronic state. Aimed at students and academics, this is the first book devoted to the effect of vibrational pre-excitation on molecular dynamics in the gas phase. In particular, it deals with the influence of this excitation on the dissociation of molecules (ie: on the branching ratio between the dissociation products and its dependence on the vibrational state being excited). The effect in the gas phase has been extensively studied, both theoretically and experimentally and encompasses diverse areas of chemical physics. This monograph presents the methodology of VMP, using state-of-the-art specific examples. Overviews of earlier works are included as well, to serve as a background for current research. Wherever appropriate, original works are quoted, including the original drawings. The contents include a brief review of theoretical and experimental methods relevant to VMP and specific examples. Also included are a bibliography, author and subject index. From the description of the motivation, the approach, the execution of the experiment and the analysis of the results of the specific examples, the reader will get a comprehensive understanding of the field. The book is aimed at senior undergraduate and graduate students of chemistry and physics. It serves as an introduction to VMP for beginners and as a literature guide to those acquainted with the subject but not necessarily working on VMP
    Schlagwörter Gas dynamics ; Molecular dynamics ; Photodissociation ; Surfaces (Physics) ; Vibration
    Sprache Englisch
    Umfang Online-Ressource (175 p), 71 b&w, ill
    Verlag Royal Society of Chemistry
    Erscheinungsort Cambridge
    Dokumenttyp Buch ; Online
    Anmerkung Ebook
    ISBN 1847558178 ; 9781847558176
    Datenquelle Katalog der Technische Informationsbibliothek Hannover

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  6. Buch ; Online: Vibrationally mediated photodissociation

    Rosenwaks, Salman

    2009  

    Abstract: The first book to cover the effect of vibrational pre-excitation on molecular dynamics, both in the gas phase and on surfaces, Vibrationally Mediated Photodissociation (VMP) deals with the influence of vibrational excitation of the ground electronic ... ...

    Verfasserangabe Salman Rosenwaks
    Abstract The first book to cover the effect of vibrational pre-excitation on molecular dynamics, both in the gas phase and on surfaces, Vibrationally Mediated Photodissociation (VMP) deals with the influence of vibrational excitation of the ground electronic state of a molecule on its dissociation following excitation of this state to a higher electronic state. Aimed at students and academics, this is the first book devoted to the effect of vibrational pre-excitation on molecular dynamics in the gas phase. In particular, it deals with the influence of this excitation on the dissociation of molecules (ie: on the branching ratio between the dissociation products and its dependence on the vibrational state being excited). The effect in the gas phase has been extensively studied, both theoretically and experimentally and encompasses diverse areas of chemical physics. This monograph presents the methodology of VMP, using state-of-the-art specific examples. Overviews of earlier works are included as well, to serve as a background for current research. Wherever appropriate, original works are quoted, including the original drawings. The contents include a brief review of theoretical and experimental methods relevant to VMP and specific examples. Also included are a bibliography, author and subject index. From the description of the motivation, the approach, the execution of the experiment and the analysis of the results of the specific examples, the reader will get a comprehensive understanding of the field. The book is aimed at senior undergraduate and graduate students of chemistry and physics. It serves as an introduction to VMP for beginners and as a literature guide to those acquainted with the subject but not necessarily working on VMP
    Schlagwörter Gas dynamics ; Molecular dynamics ; Photodissociation ; Surfaces (Physics) ; Vibration
    Sprache Englisch
    Umfang Online-Ressource (175 p), 71 b&w, ill
    Verlag Royal Society of Chemistry
    Erscheinungsort Cambridge
    Dokumenttyp Buch ; Online
    Anmerkung Ebook
    ISBN 1847558178 ; 9781847558176
    Datenquelle Ehemaliges Sondersammelgebiet Küsten- und Hochseefischerei

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  7. Artikel ; Online: Analysis of continuous wave diode pumped cesium laser with gas circulation: experimental and theoretical studies.

    Yacoby, Eyal / Auslender, Ilya / Waichman, Karol / Sadot, Oren / Barmashenko, Boris D / Rosenwaks, Salman

    Optics express

    2018  Band 26, Heft 14, Seite(n) 17814–17819

    Abstract: Analysis of the operation of flowing-gas low power DPALs is crucial for designing high power devices. In particular, the comparison between the measured and calculated temperature rise in the laser cell makes it possible to estimate the contribution of ... ...

    Abstract Analysis of the operation of flowing-gas low power DPALs is crucial for designing high power devices. In particular, the comparison between the measured and calculated temperature rise in the laser cell makes it possible to estimate the contribution of the quenching of the alkali atoms electronic states to the gas heating. Here we report on an experimental and theoretical study of continuous wave flowing-gas Cs DPAL with He and CH
    Sprache Englisch
    Erscheinungsdatum 2018-08-16
    Erscheinungsland United States
    Dokumenttyp Journal Article
    ZDB-ID 1491859-6
    ISSN 1094-4087 ; 1094-4087
    ISSN (online) 1094-4087
    ISSN 1094-4087
    DOI 10.1364/OE.26.017814
    Datenquelle MEDical Literature Analysis and Retrieval System OnLINE

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  8. Artikel ; Online: Ab initio quantum mechanical study of the O((1)D) formation in the photolysis of ozone between 300 and 330 nm.

    Grebenshchikov, Sergy Yu / Rosenwaks, Salman

    The journal of physical chemistry. A

    2010  Band 114, Heft 36, Seite(n) 9809–9819

    Abstract: Spin-allowed production of O((1)D) in the near-UV photolysis of ozone is studied using ab initio potential energy surfaces and quantum mechanics. The O((1)D) quantum yield, reconstructed from the absolute cross sections for eight initial vibrational ... ...

    Abstract Spin-allowed production of O((1)D) in the near-UV photolysis of ozone is studied using ab initio potential energy surfaces and quantum mechanics. The O((1)D) quantum yield, reconstructed from the absolute cross sections for eight initial vibrational states in the ground electronic state, is shown to agree with the measurements in a broad range of photolysis wavelengths and temperatures. Relative contributions of one- and two-quantum stretching and bending initial excitations are quantified, with the contribution of the antisymmetric stretch being dominant for lambda < 330 nm. Large scale structures in the low-resolution quantum yield are shown to reflect excitations in the high-frequency short bond stretch in the upper electronic state. Spin-forbidden contribution to the O((1)D) quantum yield at wavelengths lambda > 320 nm is estimated using ab initio energies of the triplet states and their spin-orbit couplings.
    Sprache Englisch
    Erscheinungsdatum 2010-09-16
    Erscheinungsland United States
    Dokumenttyp Journal Article
    ISSN 1520-5215
    ISSN (online) 1520-5215
    DOI 10.1021/jp1028849
    Datenquelle MEDical Literature Analysis and Retrieval System OnLINE

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  9. Artikel ; Online: Vibrational overtone spectroscopy and intramolecular dynamics of C-H stretches in pyrrole.

    Portnov, Alexander / Epshtein, Michael / Rosenwaks, Salman / Bar, Ilana

    The Journal of chemical physics

    2013  Band 138, Heft 19, Seite(n) 194310

    Abstract: Room-temperature photoacoustic spectra and jet-cooled action spectra of the regions of the first and second C-H stretch overtones of pyrrole were measured with the goal of gaining new insight on the vibrational patterns and the intramolecular energy flow ...

    Abstract Room-temperature photoacoustic spectra and jet-cooled action spectra of the regions of the first and second C-H stretch overtones of pyrrole were measured with the goal of gaining new insight on the vibrational patterns and the intramolecular energy flow out of the initially excited vibrational states. The rotational cooling of the action spectra helped in observing hitherto unresolved features, assisting determination of the existing multiple bands and their positions in each region. These bands were analyzed by building vibrational Hamiltonian matrices related to a simplified joint local-mode∕normal-mode (LM∕NM) model, accounting for two types of C-H stretches and their Fermi resonances with the CCH deformation modes. The diagonalization of the LM∕NM vibrational Hamiltonians and the fitting of the eigenvalues to the band positions revealed model parameters, enabling assignment of the observed bands. The time dependences of the survival probabilities of the C-H stretches in the region of the first and second overtones, deduced from the vibrational Hamiltonian, show quantum beats due to the couplings to the deformations and decays driven by weaker interactions to the bath states. The C-H stretches, although somewhat lower in energy, show stronger coupling than the N-H stretches.
    Mesh-Begriff(e) Pyrroles/chemistry ; Quantum Theory ; Spectrum Analysis ; Vibration
    Chemische Substanzen Pyrroles
    Sprache Englisch
    Erscheinungsdatum 2013-05-21
    Erscheinungsland United States
    Dokumenttyp Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 3113-6
    ISSN 1089-7690 ; 0021-9606
    ISSN (online) 1089-7690
    ISSN 0021-9606
    DOI 10.1063/1.4804540
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  10. Artikel ; Online: Vibrational dynamics of pyrrole via frequency-domain spectroscopy.

    Portnov, Alexander / Epshtein, Michael / Rosenwaks, Salman / Bar, Ilana

    The Journal of chemical physics

    2012  Band 136, Heft 2, Seite(n) 24313

    Abstract: The N-H stretch overtones of pyrrole, a key constituent of biologic building blocks, were studied by room temperature photoacoustic and jet-cooled action spectroscopies to unravel their intramolecular dynamics. Contrary to "isolated" states excited with ... ...

    Abstract The N-H stretch overtones of pyrrole, a key constituent of biologic building blocks, were studied by room temperature photoacoustic and jet-cooled action spectroscopies to unravel their intramolecular dynamics. Contrary to "isolated" states excited with two and three N-H stretch quanta, the one with four quanta shows strong accidental resonances with two other states involving three quanta of N-H stretch and one quantum of C-H stretch. The inhomogeneously reduced features in the action spectra provide the means for getting insight into the intramolecular interactions and the factors controlling energy flow within pyrrole. The time dependence of the survival probability of the 4ν(1) N-H stretch, deduced from the vibrational Hamiltonian, shows an initial decay in ~0.3 ps with ensuing quantum beats from the N-H-C-H resonance and their decay with a time constant of about 5 ps as a result of weaker coupling to bath states.
    Mesh-Begriff(e) Pyrroles/chemistry ; Quantum Theory ; Spectroscopy, Near-Infrared ; Vibration
    Chemische Substanzen Pyrroles
    Sprache Englisch
    Erscheinungsdatum 2012-01-14
    Erscheinungsland United States
    Dokumenttyp Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 3113-6
    ISSN 1089-7690 ; 0021-9606
    ISSN (online) 1089-7690
    ISSN 0021-9606
    DOI 10.1063/1.3673614
    Datenquelle MEDical Literature Analysis and Retrieval System OnLINE

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