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Author: R. Bersohn
Publisher:
ISBN:
Category :
Languages : en
Pages : 6
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Book Description
The Ar-F laser (193 nm) was used to photodissociate molecular beams of SO2, CS2, aryl halides, phenyl cyanide and isocyanide, nitroalkenes and nitrobenzene, and H2O2. The translational energy distributions of the fragments were measured. In addition, the internal energy distributions of CS (from CS2) and OH fragments from H2O2 were measured. The excess of photon energy over bond energy is released primarily as vibration for SO2 and primarily as translation for H2O2. For CS2 comparable amounts of energy appear in translation and vibration; 80% of the S atoms appear in the 1(D) state. Both phenylcyanide, C6H5CN and phenylisocyanide, C6H5NC gave CN and C6H5 fragments. In spite of the greater energy available, C6H5NC yielded slower CN fragments. The iodobenzene fragmentation occurred by two processes, one from the initially excited state which gave fast fragments and the other from a lower energy state which gave slower fragments and, of course, more internal energy. (Author).
Author: R. Bersohn
Publisher:
ISBN:
Category :
Languages : en
Pages : 6
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Book Description
The Ar-F laser (193 nm) was used to photodissociate molecular beams of SO2, CS2, aryl halides, phenyl cyanide and isocyanide, nitroalkenes and nitrobenzene, and H2O2. The translational energy distributions of the fragments were measured. In addition, the internal energy distributions of CS (from CS2) and OH fragments from H2O2 were measured. The excess of photon energy over bond energy is released primarily as vibration for SO2 and primarily as translation for H2O2. For CS2 comparable amounts of energy appear in translation and vibration; 80% of the S atoms appear in the 1(D) state. Both phenylcyanide, C6H5CN and phenylisocyanide, C6H5NC gave CN and C6H5 fragments. In spite of the greater energy available, C6H5NC yielded slower CN fragments. The iodobenzene fragmentation occurred by two processes, one from the initially excited state which gave fast fragments and the other from a lower energy state which gave slower fragments and, of course, more internal energy. (Author).
Author: Cheuk-yiu Ng
Publisher: World Scientific
ISBN: 9814506575
Category : Science
Languages : en
Pages : 582
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Book Description
This monograph reviews the recent progress in vacuum ultraviolet (VUV) photoionization and photodissociation processes. Photoionization, photoelectron, and fluorescence spectroscopic techniques have played an important role in revealing the photoionization and photodissociation dynamics of molecules in the vacuum ultraviolet region and in providing accurate energetic and spectroscopic information of ions as well as neutral molecules. The book represents the first detailed review of major experimental developments in the studies of single vacuum ultraviolet photon ionization and dissociation processes of gaseous molecules and clusters.
Author: Lee Richard Carlson
Publisher:
ISBN:
Category :
Languages : en
Pages : 302
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Author: L. Gregory Huey
Publisher:
ISBN:
Category :
Languages : en
Pages : 584
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Author:
Publisher:
ISBN:
Category :
Languages : en
Pages :
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A description is presented of a study of the photodissociation dynamics of molecules in a molecular beam. Photo-fragmentation translational spectroscopy has been utilized to observe the photodissociation dynamics of ozone. Using a supersonic molecular beam and a 10 nanosecond pulsed laser at lambda = 266 nm, the velocities of the fragment products are measured by the method of time of flight. The resolution of the time of flight spectrum of ozone is sufficiently high that the electronic and vibrational states are clearly resolved and identified. Above the threshold (lambda 310 nm), the quantum yield for the production of O(1D) has been estimated in the past to be unity for the process O3 (1A1) + h.nu.)lambda 300 nm) .--. O3(1B2) .--. O2(1.delta./sub g/) + O(1D). However a small production of O2 (3.sigma./sub g/−) + O(3P) has been observed in this study. The O2(1.delta./sub g/) product yields four vibrational states (v = 0, 1, 2, 3) which yields a vibrational temperature of 2700°K along with narrow energy distributions of rotational levels. These energy distributions are compared with photodissociation models along with the polarization dependence of the dissociative process which was also measured. 143 references.
Author: Gabriel Alejandro Amaral
Publisher:
ISBN:
Category : Molecular dynamics
Languages : en
Pages : 406
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Author: Mark Douglas Nachbor
Publisher:
ISBN:
Category :
Languages : en
Pages : 374
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Author: Jeffrey Allan Bartz
Publisher:
ISBN:
Category :
Languages : en
Pages : 290
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Author: Richard N. Zare
Publisher:
ISBN:
Category : Photodissociation
Languages : en
Pages : 62
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Author: Michael Aaron Todt
Publisher:
ISBN:
Category :
Languages : en
Pages : 216
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