نتایج جستجو برای: ultraviolet photoelectron spectrum

تعداد نتایج: 272646  

2015
R. T. Wiedmann R. G. Tonkyn M. G. White Kwanghsi Wang V. McKoy Arthur Amos Noyes

Articles you may be interested in Electric field effects in the near‐threshold photoionization spectrum of nitric oxide Shape resonance effects in the rotationally resolved photoelectron spectra of O2 The results of combined experimental and theoretical studies of the rotationally resolved photoelectron spectra of OH and OD following single-photon ionization are presented. The measured zero-kin...

Journal: :The Review of scientific instruments 2009
Andras Bodi Melanie Johnson Thomas Gerber Zsolt Gengeliczki Bálint Sztáray Tomas Baer

An imaging photoelectron photoion coincidence spectrometer at the vacuum ultraviolet (VUV) beamline of the Swiss Light Source is presented and a few initial measurements are reported. Monochromatic synchrotron VUV radiation ionizes the cooled or thermal gas-phase sample. Photoelectrons are velocity focused, with better than 1 meV resolution for threshold electrons, and also act as start signal ...

Journal: :The journal of physical chemistry. A 2015
Youssef Majdi Majdi Hochlaf Yi Pan Kai-Chung Lau Lionel Poisson Gustavo A Garcia Laurent Nahon Muneerah Mogren Al-Mogren Martin Schwell

We report on the vibronic structure of the ground state X̃(2)A″ of the thymine cation, which has been measured using a threshold photoelectron photoion coincidence technique and vacuum ultraviolet synchrotron radiation. The threshold photoelectron spectrum, recorded over ∼0.7 eV above the ionization potential (i.e., covering the whole ground state of the cation) shows rich vibrational structure ...

2001
J. P. Fulmer W. T. Tysoe F. Zaera

The nature of the surface formed by a saturated layer (8(NO) = 1.0) of NO on a Mo(100) surface at 150 K has been determined by using both angle-resolved ultraviolet photoelectron spectroscopy and the angular variation of near-edge X-ray absorption fine structure (NEXAFS). Photoelectron spectroscopy indicates that NO can adsorb molecularly at this temperature but that a portion of the NO is also...

Journal: :Physical review letters 2005
Daiichiro Sekiba Kan Nakatsuji Yoshihide Yoshimoto Fumio Komori

We have observed a novel modification of a surface state due to a local strain field induced by a nanopattern formation. N adsorption on the Cu(100) surface induces a nanoscale grid pattern, where the clean Cu regions remain periodically. The lattice is contracted on the clean region by adjacent c(2 x 2)N domains, which have a larger lattice constant. On this patterned surface, we have investig...

Journal: :The journal of physical chemistry. B 2006
Darcy S Peterka Jeong Hyun Kim Chia C Wang Daniel M Neumark

The photoionization of He droplets doped with SF6 was investigated using tunable vacuum ultraviolet (VUV) synchrotron radiation from the Advanced Light Source (ALS). The resulting ionization and photofragmentation dynamics were characterized using time-of-flight mass spectrometry combined with photofragment and photoelectron imaging. Results are compared to those of gas-phase SF6 molecules. We ...

2001
De-Chao Wang Foo-Tim Chau Edmond P. F. Lee John M. Dyke

The ultraviolet photoelectron spectrum of F2O was recorded with a higher resolution than previously published. New vibrational structure was observed in the second and third bands. Near state-of-the-art molecular orbital calculations were performed on the X̃ A1 state of F2O and the X̃ B1 , B2 , A1 , and A2 state of F2O , and their potential energy functions were computed. Spectral simulations bas...

Journal: :Bulletin of the Chemical Society of Japan 1979

2013
Tianming Yang Qingyi He Yuying Liu Chaozhen Zhu Dan Zhao

A simple, rapid, and specific method for Hg(II) detection has been proposed based on the fluorescence change of N-acetyl-L-cysteine-capped CdTe quantum dots (QDs). The presence of Hg(II) ions could quench the fluorescence of QDs at 565 nm and meanwhile produce new peak in 700-860 nm wavelength range. The linear response range is 20-430 nM with the detection limit at 8.0 nM Hg(II). It was found ...

Journal: :Journal of the Spectroscopical Society of Japan 1973

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