Results 111 to 120 of about 44,713 (249)

New theoretical method for calculating the radiative association cross section of a triatomic molecule: Application to N2-H-

open access: yes, 2013
We present a new theoretical method to treat the atom diatom radiative association within a time independent approach. This method is an adaptation of the driven equations method developed for photodissociation.
Hochlaf, M., Lique, F., Stoecklin, T.
core   +4 more sources

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

The chemistry of fluorine-bearing molecules in diffuse and dense interstellar gas clouds

open access: yes, 2005
We present a theoretical investigation of the chemistry of fluorine-bearing molecules in diffuse and dense interstellar gas clouds. The chemistry of interstellar fluorine is qualitatively different from that of any other element, because - unlike the ...
Neufeld, David A.   +2 more
core   +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

Cosmological Constraints on the Scale of Supersymmetry Breaking

open access: yes, 1995
We consider the cosmological and astrophysical constraints on the decay of massive $E_8 \times E_8^\prime$ superstring axions associated with the hidden sector.
Abbott   +26 more
core   +1 more source

Hydroxyl super rotors from vacuum ultraviolet photodissociation of water

open access: yesNature Communications, 2019
Free electron lasers provide a state-of-the-art tool to investigate the photochemistry of water. Here, the authors show that highly rotationally excited hydroxyl radicals, so-called “super rotors” existing above the bond dissociation energy, are observed
Yao Chang   +16 more
doaj   +1 more source

Chemistry and radiative shielding in star forming galactic disks

open access: yes, 2016
To understand the conditions under which dense, molecular gas is able to form within a galaxy, we post-process a series of three-dimensional galactic-disk-scale simulations with ray-tracing based radiative transfer and chemical network integration to ...
Kim, Chang-Goo   +7 more
core   +1 more source

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