Results 121 to 130 of about 40,528 (226)

Prediction of forbidden ultraviolet and visible emissions in comet 67P/Churyumov-Gerasimenko

open access: yes, 2015
Remote observation of spectroscopic emissions is a potential tool for the identification and quantification of various species in comets. CO Cameron band (to trace \cod) and atomic oxygen emissions (to trace H$_2$O and/or CO$_2$, CO) have been used to ...
Bhardwaj, Anil   +2 more
core   +1 more source

Quantitative Measurement of Surface Oxidation of Polypropylene by O Atoms: Increase and Subsequent Decrease in Hydrophilicity Induced by O‐Atom Treatment

open access: yesPlasma Processes and Polymers, Volume 22, Issue 4, April 2025.
Oxidation of polypropylene surfaces by O atoms initially reduces the water contact angle (WCA) on the surface but subsequently causes the WCA to increase. The changes in the WCA reduction and increase rates with respect to the density and flux of O atoms are examined. Their mechanism is also discussed.
Yuto Kimata, Hao Du, Ryo Ono
wiley   +1 more source

Strong and selective isotope effect in the vacuum ultraviolet photodissociation branching ratios of carbon monoxide

open access: yesNature Communications, 2019
Carbon monoxide is the main C and O reservoir in interstellar media, where it undergoes photochemistry. The authors show that isotopic substitution affects not only its absorption. spectrum and photodissociation rates but also the branching ratio, key to
Pan Jiang   +4 more
doaj   +1 more source

Maskless Synthesis of van der Waals Heterostructure Arrays Engineered for Light Harvesting on Large Area Templates

open access: yesSmall, Volume 21, Issue 15, April 16, 2025.
Large area fabrication of few‐layer MoS2‐WS2 vertical heterostructures nanoarrays over periodically nanostructured silica templates is demonstrated by means of a custom‐made physical deposition set‐up. The optical anomalies arising from subwavelength periodicity and the engraved WS2 nanostripes acting as optical sensitizers result in broadband and ...
Matteo Gardella   +8 more
wiley   +1 more source

Optical signatures of molecular particles via mass-selected cluster spectroscopy [PDF]

open access: yes, 1990
A new molecular beam apparatus was developed to study optical absorption in cold (less than 100 K) atomic clusters and complexes produced by their condensation with simple molecular gases.
Duncan, Michael A.
core   +1 more source

Impacts Into Titan's Methane‐Clathrate Crust as a Source of Atmospheric Methane

open access: yesJournal of Geophysical Research: Planets, Volume 130, Issue 4, April 2025.
Abstract Titan is the only icy satellite in the solar system with a dense atmosphere. This atmosphere is composed primarily of nitrogen with a few percent methane, which supports an active, methane‐based hydrological cycle on Titan. The presence of methane, however, is intriguing, as its lifetime is likely much shorter than the age of the solar system ...
S. Wakita   +7 more
wiley   +1 more source

The Molecular Cloud Life Cycle. I. Constraining H2 Formation and Dissociation Rates with Observations

open access: yesThe Astrophysical Journal
Molecular clouds (MCs) are the birthplaces of new stars in galaxies. A key component of MCs are photodissociation regions (PDRs), where far-ultraviolet radiation plays a crucial role in determining the gas’s physical and chemical state.
Shmuel Bialy   +11 more
doaj   +1 more source

Global Sensitivity Analysis of Nitric Oxide‐Related Chemical Reaction Rates in the Global Ionosphere Thermosphere Model

open access: yesSpace Weather, Volume 23, Issue 4, April 2025.
Abstract Accurate modeling of thermospheric impact of high solar and geomagnetic activities is crucial for safeguarding our space‐based infrastructure. However, current modeling capabilities are still unable to accurately predict thermospheric density, which is a key parameter for calculating satellite drags.
Atishnal E. Chand   +3 more
wiley   +1 more source

Dynamic Stark shift of the 3R1 Rydberg state of CH3I

open access: yesEPJ Web of Conferences, 2013
Stark shift of the 3R1 Rydberg state of CH3I is measured for different Stark field intensities. Photodissociation products, generated after predissociation of the state, were detected when the molecules were excited with photons resonant with the energy ...
Loriot V.   +7 more
doaj   +1 more source

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