Results 11 to 20 of about 390,267 (298)

Probing electron localization during molecular dissociation by femtosecond strong-field ion momentum spectroscopy

Communications Physics, 2023
The study of molecular valence electron dynamics and their coupling with nuclear motion is one of the frontiers of ultrafast physics and ultrafast chemistry. With time-resolved strong-field ion momentum spectroscopy, we study electron valence and nucleus
Xinning Zhao, Ting Xu, Xitao Yu, Dianxiang Ren, Mingxuan Li, Xinyu Zhang, Xiaokai Li, Pan Ma, Dongdong Zhang, Chuncheng Wang, Qinxin Wang, Xiaoqing Hu, Sizuo Luo, Yong Wu, Jianguo Wang, Dajun Ding   +15 more
doaj   +1 more source

Cosmic Ray Dissociation of Molecular Hydrogen and Dense Cloud Chemistry [PDF]

Research Notes of the AAS, 2020
Abstract Dissociation of molecular hydrogen by secondary electrons produced by cosmic ray or X-ray ionization plays a crucial role in the chemistry of the densest part of molecular clouds. Here we study the effect of the mean kinetic energy of secondary electrons on this process. We compare predictions using a range of secondary electron
Gargi Shaw, G. J. Ferland, S. Ploeckinger   +2 more
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Dissociation Chemistry of Hydrogen-Deficient Radical Peptide Anions [PDF]

Journal of the American Society for Mass Spectrometry, 2011
The fragmentation chemistry of anionic deprotonated hydrogen-deficient radical peptides is investigated. Homolytic photodissociation of carbon-iodine bonds with 266 nm light is used to generate the radical species, which are subsequently subjected to collisional activation to induce further dissociation.
Moore, Benjamin, Sun, Qingyu, Hsu, Julie C., Lee, Albert H., Yoo, Gene C., Ly, Tony, Julian, Ryan R.   +6 more
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Impact of acidity and surface-modulated acid dissociation on cloud response to organic aerosol [PDF]

Atmospheric Chemistry and Physics
Acid dissociation of the organic aerosol fraction has the potential to impact cloud-activating properties by altering aqueous-phase H+ concentrations and water activity but is currently overlooked in most atmospheric aerosol models.
G. Sengupta, M. Zheng, M. Zheng, N. L. Prisle   +3 more
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The Historical Development of the Words “Dissociation” and “Ionization” in Chemistry

Revista Debates em Ensino de Química, 2023
The words "dissociation" and "ionization" are sources of misconceptions in chemistry teaching, mainly in the subjects of acids and bases, chemical equilibrium and solutions. In the present article, the historical development of the two words was analyzed.
Giovanni Miraveti Carriello, Guilherme Manassés Pegoraro, João Batista dos Santos Junior   +2 more
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Hypervelocity Richtmyer–Meshkov instability [PDF]

, 1997
The Richtmyer-Meshkov instability is numerically investigated for strong shocks, i.e., for hypervelocity cases. To model the interaction of the flow with non-equilibrium chemical effects typical of high-enthalpy flows, the Lighthill-Freeman ideal ...
Meiron, Daniel I., Samtaney, Ravi
core   +1 more source

CO2 Dissociation using the Versatile Atmospheric Dielectric Barrier Discharge Experiment (VADER)

Frontiers in Physics, 2014
Dissociation of CO2 is investigated in an atmospheric pressure dielectric barrier discharge (DBD) with a simple, zero dimensional (0-D) chemical model and through experiment.
Michael Allen Lindon, Earl eScime
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Dissociative recombination as primary dissociation channel in plasma chemistry

Journal of Physics: Conference Series, 2009
Molecule formation, surface modification and deposition in plasmas can in first order be described as dissociation in the plasma and association of fragments at the surface. In active plasmas ionization and dissociation by electrons is accompanied by excitation.
Schram, D.C., Zijlmans, R.A.B., Gabriel, O.G., Engeln, R.A.H.   +3 more
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MENTAL MODEL OF PROSPECTIVE CHEMISTRY TEACHER ON EQUILIBRIUM CONSTANT AND DEGREE OF DISSOCIATION

Jurnal Kependidikan: Penelitian Inovasi Pembelajaran, 2019
MODEL MENTAL CALON GURU KIMIA PADA KONSEP TETAPAN KESETIMBANGAN DAN DERAJAT DISOSIASI Abstrak Penelitian ini bertujuan untuk mengeksplorasi model mental calon guru kimia pada konsep tetapan kesetimbangan dan derajat disosiasi.
Anggra Prasetya Cahya, Antuni Wiyarsi, Anti Kolonial Prodjosantoso   +2 more
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The Roasting Marshmallows Program with IGRINS on Gemini South I: Composition and Climate of the Ultrahot Jupiter WASP-18 b

The Astronomical Journal, 2023
We present high-resolution dayside thermal emission observations of the exoplanet WASP-18 b using IGRINS on Gemini South. We remove stellar and telluric signatures using standard algorithms, and we extract the planet signal via cross-correlation with ...
Matteo Brogi, Vanessa Emeka-Okafor, Michael R. Line, Siddharth Gandhi, Lorenzo Pino, Eliza M.-R. Kempton, Emily Rauscher, Vivien Parmentier, Jacob L. Bean, Gregory N. Mace, Nicolas B. Cowan, Evgenya Shkolnik, Joost P. Wardenier, Megan Mansfield, Luis Welbanks, Peter Smith, Jonathan J. Fortney, Jayne L. Birkby, Joseph A. Zalesky, Lisa Dang, Jennifer Patience, Jean-Michel Désert   +21 more
doaj   +1 more source