Results 61 to 70 of about 64,474 (291)

Photodissociation of the OD radical at 226 and 243 nm [PDF]

, 2003
The photodissociation dynamics of state selected OD radicals has been examined at 243 and 226 nm using velocity map imaging to probe the angle–speed distributions of theD(2S) and O(3P2) products.
Chestakov, Dmitri A., Eppink, Andre T.J.B., Greenslade, Margaret E., Groenenboom, Gerrit G., Lester, Marsha I., Parker, David H., Radenovic, Dragana C., ter Meulen, J J., van der Loo, Mark P.J., van Roij, Andre J.A.   +9 more
core   +1 more source

Photodissociation and the Morphology of HI in Galaxies

, 2004
Young massive stars produce Far-UV photons which dissociate the molecular gas on the surfaces of their parent molecular clouds. Of the many dissociation products which result from this ``back-reaction'', atomic hydrogen \HI is one of the easiest to ...
A Sternberg, AN Witt, BG Elmegreen, DA Smith, DJ Hollenbach, DJ Hollenbach, EJ Shaya, GB Field, J-M Deharveng, JE Pringle, JM Shull, L Vigroux, MG Wolfire, MG Wolfire, MJ Kaufman, O Laurent, R Braun, R Braun, RJ Allen, RJ Allen, RJ Allen, RJ Allen, RJ Allen, SC Madden, TP Stecher   +24 more
core   +2 more sources

Modelling Primordial Gas in Numerical Cosmology [PDF]

, 1996
We have reviewed the chemistry and cooling behaviour of low-density (n H2 + H+, and H- + H -> H2 + e-, is likely to be converted into its para configuration on a faster time scale than the formation time scale.
Abel, Aldrovandi, Allison, Allison, Anninos, Anninos, Bell, Bieniek, Black, Browne, Cen, Corrigan, Couchman, Couchman, Dalgarno, Dalgarno, De Jong, Dolder, Donahue, Dove, Dove, Dove, Dunn, Ferland, Flower, Haiman, Hollenbach, Hummer, Hutchins, Janev, Janev, Karpas, Kashlinsky, Latter, Launay, Lennon, Lenzuni, Lepp, Lepp, Mac Low, Mandy, Martin, Martin, Michael L. Norman, Mihalas, Mitchell, Moessner, Moseley, Nakashima, O'Neil, Osterbrock, Osterbrock, Padoan, Palla, Peart, Peebles, Peebles, Peter Anninos, Poulaert, Prasad, Puy, Ramaker, Rawlings, Rees, Sargent, Saslaw, Sauval, Schneider, Senekowitsch, Shapiro, Shull, Shull, Sobelman, Stahler, Stancil, Stancil, Stecher, Sun, Szucs, Szucs, Tegmark, Tom Abel, Vietri, Wadehra, Wishart, Yu Zhang   +85 more
core   +2 more sources

Charge State Influence on Stability and Isomerism in Dehydrogenated PAHs: Insights from Anthracene, Acridine, and Phenazine

ChemPhysChem, Volume 26, Issue 6, March 15, 2025.
The ionization of anthracene, acridine, and phenazine has been explored, along with the removal of one and two hydrogen atoms, to provide valuable information for astrochemists and to understand the behavior of the resulting structures and their electronic reorganization. Abstract In this study, we systematically explored the stability and isomerism of
Khaldia Zghida, Farouk Hamza Reguig, Manuel Alcamí, Al Mokhtar Lamsabhi   +3 more
wiley   +1 more source

Atmospheric processes on ice nanoparticles in molecular beams

Frontiers in Chemistry, 2014
This review summarizes some recent experiments with ice nanoparticles (large water clusters) in molecular beams and outlines their atmospheric relevance: (1) Investigation of mixed water–nitric acid particles by means of the electron ionization and ...
Michal eFárník, Viktoriya ePoterya
doaj   +1 more source

Vibrationally excited molecular hydrogen production from the water photochemistry

Nature Communications, 2021
Understanding the source of vibrationally excited molecular hydrogen is an essential prerequisite for understanding the chemical evolution in the universe.
Yao Chang, Feng An, Zhichao Chen, Zijie Luo, Yarui Zhao, Xixi Hu, Jiayue Yang, Weiqing Zhang, Guorong Wu, Daiqian Xie, Kaijun Yuan, Xueming Yang   +11 more
doaj   +1 more source

Dissociation Dynamics of CIONO_2 and Relative Cl and ClO Product Yields following Photoexcitation at 308 nm [PDF]

, 1995
Chlorine nitrate photolysis at 308 nm has been investigated with a molecular beam technique. Two primary decomposition pathways, leading to Cl + NO_3 and ClO + NO_2, were observed.
Minton, Timothy K., Moore, Teresa A., Okumura, Mitchio, Tagawa, Masahito   +3 more
core   +1 more source

Photoprocesses in protoplanetary disks

, 2006
Circumstellar disks are exposed to intense ultraviolet radiation from the young star. In the inner disks, the UV radiation can be enhanced by more than seven orders of magnitude compared with the average interstellar field, resulting in a physical and ...
Aikawa, Augereau, Bastiaan Jonkheid, Bergin, Brittain, Buenker, Calvet, Chiang, Clampin, Connors, D?Alessio, Dent, Draine, Dunning, Dutrey, Ewine F. van Dishoeck, Feigelson, Geers et al., Gorti, Greaves, Gredel, Guest, Habing, Hauschildt, Herbig, Hollenbach, Honjou, Huebner, Jonkheid, Jonkheid, Kamp, Kamp, Kamp, Kessler-Silacci, Kirby, Kirby, Koch, Koch, Lavendy, Lee, Lee, Lee, Lee, Lee, Lepp, Li, Lyons, Marc C. van Hemert, Markwick, Min, Muzerolle, Nee, Nee, Ogawa, Okabe, Pouilly, R?melt, Roberge, Roberge, Shen, Shih, Spaans, St?uber, St?uber, Suto, Suto, Suto, Suto, Sylvester, Theodorakopoulos, Thi, van Boekel, van Dishoeck, van Dishoeck, van Dishoeck, van Dishoeck, van Dishoeck, van Zadelhoff, Watanabe, Weidenschilling, Willacy, Yoshino   +81 more
core   +1 more source

Single and Double Photoionization and Photodissociation of Toluene by Soft X-rays in Circumstellar Environment [PDF]

, 2016
The formation of polycyclic aromatic hydrocarbons (PAHs) and their methyl derivatives occurs mainly in the dust shells of asymptotic giant branch (AGB) stars.
Boechat-Roberty, H. M., Fantuzzi, F., Monfredini, T., Nascimento, M. A. C., Wolff, W.   +4 more
core   +2 more sources

Ultraviolet Photodissociation Permits Comprehensive Characterization of O-Glycopeptides Cleaved with O-Glycoprotease IMPa [PDF]

, 2023
Amanda Helms, Edwin E. Escobar, Saulius Vainauskas, Christopher H. Taron, Jennifer S. Brodbelt   +4 more
openalex   +1 more source