Low-Pressure Photoionization in a Dual-Ion Funnel Injector Coupled to an Orbitrap Mass Spectrometer for Direct Analysis of Human Breath and Head-Space Sampled Coffee Roasts.
Sign Up to like & getrecommendations! Published in 2020 at "ChemPlusChem"
DOI: 10.1002/cplu.202000462
Abstract: Low-pressure photoionization (LPPI) is a versatile tool for the mass spectrometric detection of (semi-)volatile organic compounds, (s)VOC. Here, a dual-ion funnel MALDI/ESI ion injector was equipped with a direct-inlet LPPI module. A radio-frequency (RF) drive… read more here.
Keywords: breath; photoionization; mass; ion ... See more keywords
Relativistic photoionization of H-isoelectronic series including plasma shielding effects
Sign Up to like & getrecommendations! Published in 2018 at "Indian Journal of Physics"
DOI: 10.1007/s12648-018-1283-4
Abstract: With plasma shielding effects of the Debye–Hückel model, we investigate the relativistic photoionization processes of H, $${{\hbox {Nb}}}^{40+}$$Nb40+ and $${{\hbox {Pb}}}^{81+}$$Pb81+ plasmas in the H-isoelectronic series. The shielded nuclear potential of Yukawa type experienced by… read more here.
Keywords: isoelectronic series; photoionization; shielding effects; relativistic photoionization ... See more keywords
Quantitative Analysis of Bisphenol A in Recycled Paper with a Novel Direct Inlet Probe-Atmospheric Pressure Photoionization–IonTrap-MS
Sign Up to like & getrecommendations! Published in 2017 at "Journal of Analysis and Testing"
DOI: 10.1007/s41664-017-0034-4
Abstract: A new ambient ion source was developed and its application to real samples has been demonstrated. This ion source is based on a previously build ion source using chemical ionization under atmospheric pressure and extractive… read more here.
Keywords: photoionization; source; ion source; ion ... See more keywords
Angular distribution of Auger electron following photoionization in Xe atom
Sign Up to like & getrecommendations! Published in 2020 at "Journal of Electron Spectroscopy and Related Phenomena"
DOI: 10.1016/j.elspec.2020.146980
Abstract: Abstract The angular distribution of Auger electron following photoionization in Xe atom is investigated using the multiconfiguration Dirac-Fock (MCDF) method and the density matrix theory. The alignment parameters of residual ions produced by the np… read more here.
Keywords: distribution auger; auger electron; photoionization; auger ... See more keywords
Real-time monitoring biomass pyrolysis via on-line photoionization ultrahigh-resolution mass spectrometry
Sign Up to like & getrecommendations! Published in 2019 at "Fuel"
DOI: 10.1016/j.fuel.2018.08.098
Abstract: Abstract Identification of pyrolysis intermediates and products is of great significance to better understanding of a pyrolysis process and therefore its further upgrade to practical fuels. We hereby report a real-time analysis of pyrolysis volatiles… read more here.
Keywords: photoionization; mass spectrometry; pyrolysis; line ... See more keywords
The Coulomb effects in laser-assisted single photoionization
Sign Up to like & getrecommendations! Published in 2021 at "Optics Communications"
DOI: 10.1016/j.optcom.2021.126759
Abstract: Abstract Attosecond photoionization time delays reveal information about an outgoing electron getting away from the Coulomb potential. In this study, we improve the eikonal approximation model that overestimates the laser-Coulomb coupling effect in the laser-assisted… read more here.
Keywords: photoionization; laser assisted; coulomb effects; single photoionization ... See more keywords
A Vacuum Ultraviolet Photoionization Time-of-Flight Mass Spectrometer for Investigation of Free Radical Reaction
Sign Up to like & getrecommendations! Published in 2020 at "Chinese Journal of Analytical Chemistry"
DOI: 10.1016/s1872-2040(19)61208-9
Abstract: Abstract A home-made vacuum ultraviolet (VUV) photoionization linear time-of-flight mass spectrometer (VUVPI-LTOFMS) was utilized to study atmospheric radical reactions. A commercial krypton discharge lamp with photon energy at 10.6 eV was installed as VUV light… read more here.
Keywords: flight mass; photoionization; vacuum ultraviolet; mass spectrometer ... See more keywords
Rapid Determination of Ethyl Carbamate in Chinese Liquor via a Direct Injection Mass Spectrometry with Time-Resolved Flash-Thermal-Vaporization and Acetone-Assisted High-Pressure Photoionization Strategy.
Sign Up to like & getrecommendations! Published in 2023 at "Analytical chemistry"
DOI: 10.1021/acs.analchem.2c05752
Abstract: Ethyl carbamate (EC), a carcinogenic compound, is naturally produced in fermented foods and alcoholic beverages. Rapid and accurate measurement of EC is necessary and important for quality control and safety evaluation of Chinese liquor, a… read more here.
Keywords: time; liquor; ethyl carbamate; photoionization ... See more keywords
Capturing Correlation Effects on Photoionization Dynamics.
Sign Up to like & getrecommendations! Published in 2021 at "Journal of chemical theory and computation"
DOI: 10.1021/acs.jctc.1c00303
Abstract: A highly correlated combination of the equation-of-motion coupled cluster (EOM-CC) Dyson orbital and the multicentric B-spline time-dependent density functional theory (TDDFT)-based approach is proposed and implemented within the single-channel approximation to describe molecular photoionization processes.… read more here.
Keywords: photoionization dynamics; photoionization; capturing correlation; effects photoionization ... See more keywords
Single and double K-shell resonant photoionization and Auger decay of 1s → 2p excited states of O + -O 4+
Sign Up to like & getrecommendations! Published in 2017 at "Astronomy and Astrophysics"
DOI: 10.1051/0004-6361/201731110
Abstract: In this work, single and double photoionization cross sections in the vicinity of 1s → 2p resonances are investigated theoretically for quantum states belonging to the ground and first excited configurations of O+–O4+. R-matrix method… read more here.
Keywords: auger decay; photoionization; shell resonant; single double ... See more keywords
Photoionization of hydrogen-like ions in dense quantum plasmas
Sign Up to like & getrecommendations! Published in 2017 at "Physics of Plasmas"
DOI: 10.1063/1.4985658
Abstract: The photoionization of hydrogen-like ions in n ≤ 3 bound states, embedded in cold, dense quantum plasmas, is investigated in detail. The electron energies and wave functions for the bound and continuum states are determined… read more here.
Keywords: photoionization; photoionization hydrogen; like ions; quantum plasmas ... See more keywords