Results 61 to 70 of about 40,404 (274)

Fano interference and cross-section fluctuations in molecular photodissociation [PDF]

Phys. Rev. A 73, 042711 (2006), 2003
We derive an expression for the total photodissociation cross section of a molecule incorporating both indirect processes that proceed through excited resonances, and direct processes. We show that this cross section exhibits generalized Beutler-Fano line shapes in the limit of isolated resonances.
arxiv   +1 more source

Photo‐Induced Bandgap Engineering of Metal Halide Perovskite Quantum Dots In Flow

Advanced Materials, EarlyView.
This work presents a photochemical synthetic route for bandgap engineering of metal halide perovskite quantum dots. Utilizing a material‐efficient microfluidic platform, the underlying mechanism of the photo‐induced anion exchange reaction (PIAER) of metal halide perovskite quantum dots is unveiled and first instance of the PIAER‐enabled synthesis of ...
Pragyan Jha, Nikolai Mukhin, Arup Ghorai, Hamed Morshedian, Richard B. Canty, Fernando Delgado‐Licona, Emily E. Brown, Austin J. Pyrch, Felix N. Castellano, Milad Abolhasani   +9 more
wiley   +1 more source

X-ray induced Coulomb explosion imaging of transient excited-state structural rearrangements in CS2

Communications Physics, 2023
Structural imaging of transient excited-state species is a key goal of molecular physics, promising to unveil rich information about the dynamics underpinning photochemical transformations.
James Unwin, Felix Allum, Mathew Britton, Ian Gabalski, Hubertus Bromberger, Mark Brouard, Philip H. Bucksbaum, Taran Driver, Nagitha Ekanayake, Diksha Garg, Eva Gougoula, David Heathcote, Andrew J. Howard, Paul Hockett, David M. P. Holland, Sonu Kumar, Chow-shing Lam, Jason W. L. Lee, Joseph McManus, Jochen Mikosch, Dennis Milesevic, Russell S. Minns, Christina C. Papadopoulou, Christopher Passow, Weronika O. Razmus, Anja Röder, Arnaud Rouzée, Michael Schuurman, Alcides Simao, Albert Stolow, Atia Tul-Noor, Claire Vallance, Tiffany Walmsley, Daniel Rolles, Benjamin Erk, Michael Burt, Ruaridh Forbes   +36 more
doaj   +1 more source

Ab initio Study of Ground-State CS Photodissociation Via Highly Excited Electronic States [PDF]

, 2019
Photodissociation by ultraviolet radiation is the key destruction pathway for CS in photon-dominated regions, such as diffuse clouds. However, the large uncertainties of photodissociation cross sections and rates of CS, resulting from a lack of both laboratory experiments and theoretical calculations, limit the accuracy of calculated abundances of S ...
arxiv   +1 more source

Mechanisms for the Near-UV Photodissociation of CH$_3$I on D$_2$O/Cu(110) [PDF]

J. Chem. Phys. 138, 084702 (2013), 2011
The system of CH$_3$I adsorbed on submonolayer, monolayer and multilayer thin films of D$_2$O on Cu(110) has been studied by measuring the time-of-flight (TOF) distributions of the desorbing CH$_3$ fragments after photodissociation using linearly polarized $\lambda$=248nm light.
arxiv   +1 more source

New Efficient D‐π‐A and A‐π‐A Structured Type I Radical Photoinitiators for Additive Manufacturing Nanomaterials Preparation

Advanced Materials Technologies, EarlyView.
Groundbreaking advancements are discovered in 3D printing with new type‐I radical photoinitiators, including 1,1‐dimethoxy‐1‐phenylpropan‐2‐one. These innovative compounds, effective under visible light, enhance photopolymerization of acrylates and methacrylates, facilitating the creation of efficient nanocomposites and unlock the future of polymer ...
Andrzej Świeży, Filip Petko, Dominika Krok‐Janiszewska, Patryk Szymaszek, Mariusz Galek, Joanna Ortyl   +5 more
wiley   +1 more source

Photodissociation in Quantum Chaotic Systems: Random Matrix Theory of Cross-Section Fluctuations [PDF]

Phys.Rev.A v.58 (1998), 3375, 1998
Using the random matrix description of open quantum chaotic systems we calculate in closed form the universal autocorrelation function and the probability distribution of the total photodissociation cross section in the regime of quantum chaos.
arxiv   +1 more source

Photodissociation and photoionisation of atoms and molecules of astrophysical interest [PDF]

, 2017
A new collection of photodissociation and photoionisation cross sections for 102 atoms and molecules of astrochemical interest has been assembled, along with a brief review of the basic processes involved.
Bosman, A. D., Heays, A. N., van Dishoeck, E. F.   +2 more
core   +3 more sources

Isolated spin polarized hydrogen atoms as targets for laser-induced polarized electron acceleration

Frontiers in Physics
High density Spin Polarized Hydrogen (SPH) atoms, which can be prepared using UV dissociation of hydro-halide molecules, can be attractive as potential targets for laser ionization/acceleration schemes aiming to create high energy and high current ...
Dimitris Sofikitis, Marios G. Stamatakis, Dimitrios G. Papazoglou, Dimitrios G. Papazoglou, T. Peter Rakitzis, T. Peter Rakitzis   +5 more
doaj   +1 more source

The efficiency of photodissociation for molecules in interstellar ices [PDF]

, 2018
Processing by interstellar photons affects the composition of the icy mantles on interstellar grains. The rate of photodissociation in solids differs from that of molecules in the gas phase. The aim of this work was to determine an average, general ratio between photodissociation coefficients for molecules in ice and gas.
arxiv   +1 more source