Absorption Coefficients of Methyl, Ethyl, <i>n</i>-Propyl, and <i>n</i>-Butyl Alcohols

Ogawa, Masaru; Cook, G. R.

doi:10.1063/1.1744253

Cited by 24 publications

(9 citation statements)

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“…Earlier measurements of Ogawa and Cook have also been included in Figure . It should be mentioned that their reported absorption coefficients for methanol have been presently converted into photoionization cross sections by using photoionization efficiencies and branching ratios given by Burton et al Inspection of Figure reveals a significant discrepancy between dipole (e, e + ion) measurements and the results of Ogawa and Cook from threshold up to a photon energy of ∼20 eV. Recently, Berkowitz has carried out a critical review of photoabsorption cross section data on methanol using the sum rules as a guide.…”

Section: Resultsmentioning

confidence: 99%

“…Much valuable spectroscopic information on the energy states of the methanol ion has been obtained from photoelectron spectroscopy. − The ionic dissociation of CH 3 OH has been investigated by using photoion–photoelectron coincidence spectroscopy. , Berkowitz has reported relative photoionization yield curves for the major fragments from methanol. Focusing on cross sections, the object of the present study, earlier measurements of total photoabsorption cross sections were carried out by Ogawa and Cook, Person and Nicole, and Reilhac and Damany . Relative photoionization cross sections for parent and fragment ions of methanol over the photon energy range from threshold up to 14.0 eV have been determined by Refaey and Chupka .…”

Section: Introductionmentioning

confidence: 99%

“…12,13 Berkowitz 14 has reported relative photoionization yield curves for the major fragments from methanol. Focusing on cross sections, the object of the present study, earlier measurements of total photoabsorption cross sections were carried out by Ogawa and Cook, 15 Person and Nicole, 16 and Reilhac and Damany. 17 Relative photoionization cross sections for parent and fragment ions of methanol over the photon energy range from threshold up to 14.0 eV have been determined by Refaey and Chupka.…”

Section: Introductionmentioning

confidence: 99%

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Photoionization Cross Sections and Asymmetry Parameters for the Valence Shell of Methanol

2012

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Theoretical cross sections for photoionization of the methanol valence orbitals in covering a region up to 80 eV beyond the first ionization potential are reported. The molecular quantum defect orbital, MQDO, method, which has proved to be reliable in previous applications to molecular photoionization, has been used. To our knowledge, predictions of electronic partial cross section profiles on this molecule are made here for the first time, and we are not aware of any reported experimental data. Partial cross sections for production of parent and fragment ions of methanol have also been calculated and compared with previous measurements. In addition, the MQDO method has been used to calculate the angular distribution of photoelectrons for the valence orbitals of methanol over the 11-50 eV photon energy range. Our results are compared with experimental data, showing a good agreement in most cases. We hope that the present results might be of use in atmospheric and interstellar chemistry, where this molecule plays an important role.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Photoionization Cross Sections and Asymmetry Parameters for the Valence Shell of Methanol

2012

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“…The VUV data were taken from [55]. These measurements were done in the gas phase, but they can be converted to the liquid case by considering the number of absorbers in gas and liquid.…”

Section: Low Dielectric Materialsmentioning

confidence: 99%

Characterization of Optical Properties and Surface Roughness Profiles: The Casimir Force Between Real Materials

2011

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The Lifshitz theory provides a method to calculate the Casimir force between two flat plates if the frequency dependent dielectric function of the plates is known. In reality any plate is rough and its optical properties are known only to some degree. For high precision experiments the plates must be carefully characterized otherwise the experimental result cannot be compared with the theory or with other experiments. In this chapter we explain why optical properties of interacting materials are important for the Casimir force, how they can be measured, and how one can calculate the force using these properties. The surface roughness can be characterized, for example, with the atomic force microscope images. We introduce the main characteristics of a rough surface that can be extracted from these images, and explain how one can use them to calculate the roughness correction to the force. At small separations this correction becomes large as our experiments show. Finally we discuss the distance upon contact separating two rough surfaces, and explain the importance of this parameter for determination of the absolute separation between bodies.

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“…Most of the spectroscopic studies have been mainly focused on the determination of the energies of their electronically excited states. Concerning the spectral intensities, photoabsorption measurements of ethanol have been performed by several experimentalists using emission line sources [7][8][9], synchrotron radiation sources [5,10] and high-resolution dipole (e,e) spectroscopy [11] in the vacuum ultraviolet region covering from 5 to 32 eV. By contrast, photoionization cross-section data are scarce.…”

Section: Introductionmentioning

confidence: 99%

Photoionization cross sections and asymmetry parameters for ethanol. A theoretical study

Velasco

Lavín

2016

Journal of Quantitative Spectroscopy and Radiative Transfer

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Photoionization cross-sections and asymmetry parameters for the outermost orbital of ethanol has been determined with the Molecular Quantum Defect Orbital (MQDO) method. The individual ionization cross-sections corresponding to the Rydberg series that constitute the ionization channels for the production of the molecular cation in its ground state are reported. Good agreement has been found with the experiment for the photoionization cross-sections. To our knowledge, predictions of the asymmetry parameter for the ethanol are made here for the first time. It is hoped the MQDO data will be useful in combustion chemistry and astrophysics.

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Absorption Coefficients of Methyl, Ethyl, n-Propyl, and n-Butyl Alcohols

Cited by 24 publications

References 1 publication

Photoionization Cross Sections and Asymmetry Parameters for the Valence Shell of Methanol

Photoionization Cross Sections and Asymmetry Parameters for the Valence Shell of Methanol

Characterization of Optical Properties and Surface Roughness Profiles: The Casimir Force Between Real Materials

Photoionization cross sections and asymmetry parameters for ethanol. A theoretical study

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