Results 81 to 90 of about 44,713 (249)

Deuteron Photodissociation in Ultraperipheral Relativistic Heavy-Ion on Deuteron Collisions

, 2003
In ultraperipheral relativistic deuteron on heavy-ion collisions, a photon emitted from the heavy nucleus may dissociate the deuterium ion. We find deuterium breakup cross sections of 1.38 barns for deuterium-gold collisions at a center of mass energy of
A. Trzcinska, A.E. Thorlacius, A.I. Akhieser, A.J. Baltz, A.J. Buchmann, C. Adler, C. Adler, C.A. Barnes, C.W. deJager, F. Krauss, G. Baur, G. Baur, M. Chiu, M.L. Rustgi, P. Rossi, R. Bernabei, R. Glauber, R. Moreh, Ramona Vogt, S. Klein, S.J. Brodsky, Spencer Klein, Y. Birenbaum   +22 more
core   +5 more sources

Photodissociation Dynamics of DNA Bases [PDF]

Journal of Biological Physics, 2003
In order to access the damaging mechanismsof DNA and its bases on themolecular level by T Hz radiation, it isnecessary to create a database of assessingdamage at different spectral regions.Possible damage by T Hz radiation will beassessed by comparison.
Sarantopoulou, Evangelia, Kollia, Zoe, Cefalas, Alciviadis Constantinos, Kobe, S., Samardzija, Z.   +4 more
openaire   +4 more sources

Spectroscopic analysis of bacterial photoreactivation

Photochemistry and Photobiology, Volume 101, Issue 2, Page 494-504, March/April 2025.
This study investigates the effectiveness of fluorescence and Raman spectroscopy in detecting bacterial photoreactivation. Fluorescence spectroscopy shows limitations, because the intense fluorescence of tryptophan and tyrosine masks fluorescence emitted by thymine molecules.
Keyvan Khosh Abady, Negar Karpourazar, Arjun Krishnamoorthi, Runze Li, Peter M. Rentzepis   +4 more
wiley   +1 more source

The radiative association of PO/PH+ and the photodissociation of PH+

Frontiers in Astronomy and Space Sciences
The potential energy curves (PECs) and transition dipole moments (TDMs) of PH+ and PO are computed with the multireference configuration interaction method, and the cross-sections for the radiative association (RA) of PH+ and PO, which is the most ...
Yang Chen, Xiaohe Lin, Lidan Xiao, Zijian Li, Songbin Zhang, Yongjun Cheng, Yong Wu, Bing Yan   +7 more
doaj   +1 more source

Molecular photodissociation

, 2011
Photodissociation is the dominant removal process of molecules in any region exposed to intense ultraviolet (UV) radiation. This includes diffuse and translucent interstellar clouds, dense photon-dominated regions, high velocity shocks, the surface layers of protoplanetary disks, and cometary and exoplanetary atmospheres.
van Dishoeck, Ewine F., Visser, Ruud
openaire   +2 more sources

Near-UV photolysis cross sections of CH₃OOH and HOCH₂OOH determined via action spectroscopy [PDF]

Atmospheric Chemistry and Physics, 2007
Knowledge of molecular photolysis cross sections is important for determining atmospheric lifetimes and fates of many species. A method and laser apparatus for measurement of these cross sections in the near-ultraviolet (UV) region is described.
C. M. Roehl, Z. Marka, Z. Marka, J. L. Fry, J. L. Fry, P. O. Wennberg, P. O. Wennberg   +6 more
doaj  

Photoabsorption and photodissociation of molecules important in the interstellar medium [PDF]

The photoabsorption and photodissociation cross sections of several interstellar molecules and radicals in the 105 to 210 nm region were measured. The research results accomplished are briefly described.
Lee, L. C.
core   +1 more source

The Effects of UV Continuum and Lyman alpha Radiation on the Chemical Equilibrium of T Tauri Disks

, 2003
We show in this Letter that the spectral details of the FUV radiation fields have a large impact on the chemistry of protoplanetary disks surrounding T Tauri stars.
Aikawa Y., Dutrey A., Dutrey A., Edwin Bergin, Gregory J. Herczeg, Habing H. J., Lepp S., Millar T. J., Nuria Calvet, Paola D'Alessio   +9 more
core   +1 more source

Impact of Gravity Waves From Tropospheric and Non‐Tropospheric Sources on the Middle and Upper Atmosphere and Comparison With ICON/MIGHTI Winds

Journal of Geophysical Research: Space Physics, Volume 130, Issue 9, September 2025.
Abstract We study the dynamical and thermal roles of internal gravity waves generated in the troposphere and above using the Coupled Middle Atmosphere Thermosphere‐2 General Circulation Model. This model incorporates the whole atmosphere nonlinear spectral gravity wave parameterization and its extension to include non‐tropospheric sources. We conducted
Erdal Yiğit, Alexander S. Medvedev, Ayden L. S. Gann, Gary P. Klaassen, Douglas E. Rowland   +4 more
wiley   +1 more source

Elucidating the Structures of Substituted Adamantyl Esters and Ethers Using Rotational Spectroscopy and Computations

ChemPhysChem, Volume 26, Issue 15, August 4, 2025.
Five adamantyl esters and ethers with alkyl substituents of increasing branching are investigated by rotational spectroscopy. From the experimental data, their accurate structures are derived. All the derivatives feature similar CC distances, regardless of the functional group, the alkyl substituent, or other effects as methyl top internal rotation ...
Nataša Burić, Donatella Loru, Jasna Alić, Marina Šekutor, Melanie Schnell, Pablo Pinacho   +5 more
wiley   +1 more source