Results 1 to 10 of about 40,404 (274)

Photodissociation of interstellar ArH+ [PDF]

Astronomy & Astrophysics, 2014
Aims. Following the recent detection of 36ArH+ in the Crab nebula spectrum, we have computed the photodissociation rate of ArH+ in order to constrain the physical processes at work in this environment. Methods. Photodissociation cross sections of ArH+ are computed in an ab initio approach including explicit account of spin-orbit coupling. Results.
Alekseyev, A. B., Bourlot, J. Le, Roueff, E.   +2 more
arxiv   +10 more sources

Photodissociation of water in crystalline ice: a molecular dynamics study [PDF]

Chem.Phys.Lett. 408 (2005) 415, 2005
Ultraviolet irradiation of ice is of great interest for understanding the chemistry in both atmospheric and astrophysical environments. In interstellar space, photodissociation of H2O molecules can be a driving force behind the chemistry on icy dust grains in dense, cold molecular clouds even though the flux of UV photons is extremely low.
Al-Halabi, Allen, Aschi, Bartels, Bernal, Bursulaya, Chakarov, Chan, Chipman, Dobbyn, Ehrenfreund, Ewine F. van Dishoeck, Geert-Jan Kroes, Gerakines, Ghormley, Huber, Jorgensen, Khusnatdinov, Klein, Klán, Kobayashi, Langford, Larsen, Leto, Miller, Osted, Poulsen, Sander, Schinke, Stefan Andersson, Thomsen, van Harrevelt, van Harrevelt, Watanabe, Yabushita, Yang, Zhang   +36 more
arxiv   +5 more sources

Photodissociation of $$ \mathrm{Cr}{\left(\mathrm{CO}\right)}_4\mathrm{bpy} $$ : A Non-Adiabatic Dynamics Investigation. [PDF]

J Comput Chem
Carbonyl complexes of $d^6$ metals with an alpha-diimine ligand exhibit both emission and ligand-selective photodissociation from MLCT states. Studying this photodissociative mechanism is challenging for experimental approaches due to an ultrafast femtosecond timescale and spectral overlap of multiple photoproducts. The photochemistry of a prototypical
Ciborowski B, Vacher M.
europepmc   +2 more sources

Non-Equilibrium Photodissociation Regions: Ionization-Dissociation Fronts [PDF]

Astrophys.J. 458 (1996) 222, 1995
We discuss the theory of coupled ionization--dissociation fronts produced when molecular clouds are exposed to $\lambda < 1110$\AA\ radiation from hot stars. A steady, composite structure is developed, which generally includes an ionized outflow away from the cloud, an ionization front, a layer of photodissociated gas, a photodissociation front, and a ...
F. Bertoldi, B. T. Draine
arxiv   +2 more sources

The photodissociation and chemistry of CO isotopologues: applications to interstellar clouds and circumstellar disks [PDF]

, 2009
Aims. Photodissociation by UV light is an important destruction mechanism for CO in many astrophysical environments, ranging from interstellar clouds to protoplanetary disks. The aim of this work is to gain a better understanding of the depth dependence and isotope-selective nature of this process. Methods.
Abgrall, Abgrall, Aikawa, Aikawa, Bally, Bayet, Bensch, Beuther, Bhattacharya, Black, Brittain, Brown, Burgh, Cacciani, Cacciani, Cacciani, Cacciani, Cacciani, Cardelli, Caselli, Cernicharo, Chakraborty, Charnley, Clayton, Clayton, Cooper, D'Alessio, Dabrowski, Dame, Doty, Drabbels, Draine, E. F. van Dishoeck, Eidelsberg, Eidelsberg, Eidelsberg, Eidelsberg, Eikema, Evans, Federman, Federman, Federman, Fock, Fox, Frerking, Garrod, Gerin, Glassgold, Gondhalekar, Gredel, Greve, Guelachvili, Habing, Haridass, Heidenreich, Hollenbach, Hudson, Huggins, Huntress, J. H. Black, Jansen, Jennings, Jonkheid, Jonkheid, Joulain, Kamegai, Kepa, Kirby, Kramer, Lacy, Lambert, Langer, Langer, Le Bourlot, Le Petit, Le Petit, Lee, Lee, Leroy, Letzelter, Lim, Liszt, Liszt, Lommen, Loren, Lyons, Mamon, Mathis, Matsuhisa, McCutcheon, Millar, Mookerjea, Morata, Morton, Najita, Narayanan, Nuth, Oka, Panic, Pety, Prasad, Przygodda, R. Visser, Roberge, Rodgers, Röllig, Schneider, Schreyer, Sheffer, Sheffer, Sheffer, Sheffer, Sheffer, Shen, Smith, Smith, Solomon, Sonnentrucker, Stark, Stark, Sun, Teyssier, Tilford, Ubachs, Ubachs, van Boekel, van Dishoeck, van Dishoeck, van Dishoeck, van Zadelhoff, Viala, Warin, Watanabe, Wilson, Wilson, Woods, Young, Yurimoto, Zsargó   +138 more
arxiv   +3 more sources

PHOTODISSOCIATION OF PbCl2

Acta Physica Sinica, 1988
The population on 6p2 3P2 metastable state and 6p2 3P0 ground state of Pb atoms are de-monstrated, which are originated from dissociating PbCl2 by the fourth harmonic of YAG lasers. The population ratio of 3P2 to 3P0 is measured in terms of laser-induced fluorescence.
Jie Zhang, Bingying Cheng, Daozhong Zhang, Wang Lihua, Zhao Yuying, Tianjuan Wang   +5 more
openalex   +2 more sources

Simulation-guided engineering of split GFPs with efficient β-strand photodissociation [PDF]

Nature Communications, 2023
Green fluorescent proteins (GFPs) are ubiquitous for protein tagging and live-cell imaging. Split-GFPs are widely used to study protein-protein interactions by fusing proteins of interest to split GFP fragments that create a fluorophore upon typically ...
Yasmin Shamsudin, Alice R. Walker, Chey M. Jones, Todd J. Martínez, Steven G. Boxer   +4 more
doaj   +2 more sources

Enantioselective Complexation of Protonated Tyrosine by a Chiral Crown-ether: The Nature of the Hydrogen Bonds Makes the Difference. [PDF]

Chemphyschem
Conformer‐selective laser spectroscopy under cryogenic ion trap conditions unravels the binding preference of a chiral crown ether for one of the enantiomers of an amino acid. The preference of (‐) (18‐crown‐6)‐tetracarboxylic acid for (L) relative to (D) ‐ tyrosine results from different hydrogen bonds pattern.
Vo KX, Hirata K, Martínez-Haya B, Oomens J, Ishiuchi SI, Fujii M, Zehnacker A.   +6 more
europepmc   +2 more sources

Photodissociation of interstellar N2 [PDF]

Astronomy & Astrophysics, 2013
Molecular nitrogen is one of the key species in the chemistry of interstellar clouds and protoplanetary disks and the partitioning of nitrogen between N and N2 controls the formation of more complex prebiotic nitrogen-containing species.
Alan N. Heays, Brenton R. Lewis, Ewine F, Ruud Visser, Stephen T. Gibson, Van Dishoeck, Wim Ubachs, Xiaohu Li   +7 more
core   +10 more sources

Photodissociation dynamics of N3+ [PDF]

The Journal of Chemical Physics, 2022
The photodissociation dynamics of N3+ excited from its (linear) 3Σg−/(bent) 3A″ ground to the first excited singlet and triplet states is investigated. Three-dimensional potential energy surfaces for the 1A′, 1A″, and 3A′ electronic states, correlating with the 1Δg and 3Πu states in linear geometry, for N3+ are constructed using high-level electronic ...
Sarbani Patra, Juan Carlos San Vicente Veliz, Debasish Koner, Evan J. Bieske, Markus Meuwly   +4 more
openaire   +5 more sources