Results 41 to 50 of about 2,475,342 (218)

Measurement of the Photodissociation Coefficient of NO2 in the Atmosphere: II. Stratospheric Measurements [PDF]

, 1985
The photodissociation coefficient of NO2, J NO 2, has been measured from a balloon platform in the stratosphere. Results from two balloon flights are reported.
Madronich, S., Ridley, B.A., Hastie, D.R., Schiff, H.I.   +3 more
core  

Confined Hot Carrier Cooling Via Excited‐State Energy Gap Engineering in Graphyne Carbon Allotropes

ENERGY &ENVIRONMENTAL MATERIALS, EarlyView.
The excited‐state energy gap (EEG), regulated by the concentration of sp‐hybridized carbon, provides an effective handle for tuning electron–phonon coupling behavior. This design enables long‐lived confinement of hot carriers near the top of the EEG with controllable energy levels.
Fulong Dai, Zhaozhao Xiong, Yingcong Liu, Feiyu Cheng, Haochun Sun, Zhenfa Zheng, Jin Zhao, Zhuojian Liang, Zhuo Kang, Yue Zhang   +9 more
wiley   +1 more source

Photodissociation of organic molecules in star-forming regions

, 2006
The presence of methyl alcohol or methanol (CH3OH) in several astrophysical environments has been characterized by its high abundance that depends on both the production rate and the destruction rate.
S. Pilling, A. C. F. Santos, H. M. Boechat-Roberty, R. Neves   +3 more
core   +1 more source

Gas Kinematics and Dynamics of Carina Pillars: A Case Study of G287.76-0.87

The Astrophysical Journal
We study the kinematics of a pillar, namely G287.76-0.87, using three rotational lines of ^12 CO(5-4), ^12 CO(8-7), ^12 CO(11-10), and a fine structure line of [O i ] 63 μ m in southern Carina observed by SOFIA/GREAT.
Ngo-Duy Tung, Le Ngoc Tram, Archana Soam, William T. Reach, Edwin Das, Ed Chambers, Blesson Mathew, Heiko Richter   +7 more
doaj   +1 more source

Temperature-dependent, rovibrationally resolved UV photodissociation cross sections of CH including multichannel nonadiabatic interactions

Astronomy & Astrophysics
Aims. The CH radical is ubiquitous across UV-irradiated astronomical environments, and its photodissociation represents one of the principal destruction pathways in regions exposed to ultraviolet radiation.
Wang Kun, Su Xing Guang, Qin Chao Chao, Song Pan, Zhou Yi Jing, Meng Ju, Deng Zhi Hao, Wang Yu, Guo Gu Qing, Fiser Béla, Qu Yi Zhi, Wu Yong, Wang Jian Guo, Zhang Song Bin, Yang Yu Kun   +14 more
doaj   +1 more source

Kinetic Study on the Reaction of Phenylperoxy Radicals With Nitric Oxide

International Journal of Chemical Kinetics, EarlyView.
ABSTRACT Cavity ring‐down spectroscopy (CRDS) and quantum cascade laser absorption spectroscopy (QCLAS), in conjunction with pulsed laser photolysis, were employed to investigate the reaction between phenylperoxy radicals (C6H5O2) and nitric oxide (NO) at a temperature of 296 ± 4 K. The experiment was carried out under N2 as bath gas.
Maya Matsushita, Michiya Fujita, Kenichi Tonokura   +2 more
wiley   +1 more source

Photostop [PDF]

, 2013
The use of photodissociation to produce cold, slow molecules from a molecular beam of cold, fast molecules is dubbed “photostop”. The essence of the scheme is thus: a pulsed molecular beam of a precursor molecule AB seeded in a noble carrier gas is ...
ROWLAND, ADRIAN,MURRAY
core  

State-resolved UV Photodissociation of OH: High-lying Excited States, Shape Resonances, and Thermal Cross Sections

The Astrophysical Journal
The hydroxyl radical (OH) is a key intermediate in oxygen chemistry and one of the primary tracers of ultraviolet (UV)-driven molecular processing in astrophysical environments, including photodissociation regions, protoplanetary disks, and planetary ...
Yu Kun Yang, Yi Jing Zhou, Xing Guang Su, Zhi Qin, Chao Chao Qin, Yu Wang, Ju Meng, Yong Wu, Jian Guo Wang, Yi Zhi Qu, Pan Song, Song Bin Zhang, Kun Wang   +12 more
doaj   +1 more source

Cis–Trans Rotational Isomerism of Formic Acid, Sulfur, and Selenium Analogues and Their Dimers: Chemical Kinetics Under Interstellar Conditions

International Journal of Chemical Kinetics, EarlyView.
ABSTRACT We present chemical kinetic rate constants for the cis to trans isomerisation or rotamerization of monomeric seleno‐, thio‐, and formic acids and that of three of their dimeric species, based on variational transition state theory and multidimensional tunneling calculations in the gas‐phase, from 10 K to 300 K. These provide, firstly, reliable
Judith Wurmel, John M. Simmie
wiley   +1 more source

SATELLITE: Application to Planetary Nebulae IFU Data

Galaxies, 2022
The integral field unit (IFU) spectroscopic view of extended ionized nebulae, such as planetary nebulae (PNe), H II regions, and galaxies, has changed the approach of studying these objects, providing a simultaneous characterization in both spatial ...
Stavros Akras, Hektor Monteiro, Jeremy R. Walsh, Isabel Aleman, Denise R. Gonçalves, Panayotis Boumis   +5 more
doaj   +1 more source