Zobrazeno 1 - 10
of 108
pro vyhledávání: '"Babb, James F"'
Autor:
Fuente, Asunción, Roueff, Evelyne, Petit, Franck Le, Bourlot, Jacques Le, Bron, Emeric, Wolfire, Mark G., Babb, James F., Yan, Pei-Gen, Onaka, Takashi, Black, John H., Schroetter, Ilane, Van De Putte, Dries, Sidhu, Ameek, Canin, Amélie, Trahin, Boris, Alarcón, Felipe, Chown, Ryan, Kannavou, Olga, Berné, Olivier, Habart, Emilie, Peeters, Els, Goicoechea, Javier R., Zannese, Marion, Meshaka, Raphael, Okada, Yoko, Röllig, Markus, Gal, Romane Le, Sales, Dinalva A., Palumbo, Maria Elisabetta, Baratta, Giuseppe Antonio, Madden, Suzanne C., Neelamkodan, Naslim, Zhang, Ziwei E., Stancil, P. C.
One of the main problems in astrochemistry is determining the amount of sulfur in volatiles and refractories in the interstellar medium. The detection of the main sulfur reservoirs (icy H$_2$S and atomic gas) has been challenging, and estimates are b
Externí odkaz:
http://arxiv.org/abs/2404.09235
The hyperpolarizability of an atom is a property that describes the nonlinear interaction between an atom and an external electric field leading to a higher-order Stark shift. Accurate evaluations of these coefficients for various systems are crucial
Externí odkaz:
http://arxiv.org/abs/2311.10409
Autor:
Yan, Pei-Gen, Babb, James F.
Using a quantum-mechanical close-coupling method, we calculate cross sections for fine structure excitation and relaxation of Si and S atoms in collisions with atomic hydrogen. Rate coefficients are calculated over a range of temperatures for astroph
Externí odkaz:
http://arxiv.org/abs/2304.02727
Autor:
Yan, Pei-Gen, Babb, James F.
Fine-structure transitions can be involved in various processes including photon absorption, charge transfer and inelastic collision between ions, electrons and neutral atoms. We present fine-structure excitation and relaxation cross sections for the
Externí odkaz:
http://arxiv.org/abs/2211.13103
Publikováno v:
Phys. Rev. A 104, 022807 (2021)
We report a theoretical study on the long-range additive and nonadditive potentials for a three-body hybrid atom-atom-ion system composed of one ground $S$ state Li atom, one excited $P$ state Li atom and one ground $S$ state Li$^+$ ion, Li($2\,^{2}S
Externí odkaz:
http://arxiv.org/abs/2103.13829
Publikováno v:
ApJ 884 (2019), 155
We present calculated cross sections and rate coefficients for the formation of the dicarbon cation (C$_2^+$) by the radiative association process in collisions of a C$(^3P)$ atom and a C$^+(^2P^o)$ ion. Molecular structure calculations for a number
Externí odkaz:
http://arxiv.org/abs/1909.09620
Publikováno v:
Atoms 7 (2019), 54
Fully relativistic calculations have been performed for two multiplets, $3s3p^2\;^4P$ and $3s3p4s\;^4P^o$, in Al I. Wave functions were obtained for all levels of these multiplets using the GRASP programs. Reported are the E1 transitions rates for al
Externí odkaz:
http://arxiv.org/abs/1905.11510
Autor:
McLaughlin, Brendan M, Babb, James F
Publikováno v:
J. Phys. B: At. Mol. Opt. Phys. 52 (2019), 125201
Absolute photoionization cross sections for the Rb$^{2+}$ ion were recently measured at high resolution over the energy range 37.31 eV -- 44.08~eV, with autoionizing Rydberg resonance series identified, using the photon-ion merged-beam setup at the A
Externí odkaz:
http://arxiv.org/abs/1904.10770
Publikováno v:
ApJ 876 (2019), 38
Radiative association cross sections and rates are computed, using a quantum approach, for the formation of C$_2$ molecules (dicarbon) during the collision of two ground state C($^3$P) atoms. We find that transitions originating in the C$\;^1\Pi_g$,
Externí odkaz:
http://arxiv.org/abs/1904.07831
Autor:
McLaughlin, Brendan M., Babb, James F.
Publikováno v:
MNRAS 486, 245 (2019)
Single photoionization cross sections for Kr-like Rb$^+$ ions are reported in the energy (wavelength) range 22 eV (564 \AA) to 46 eV (270 \AA). Theoretical cross section calculations for this {\it trans}-Fe element are compared with measurements from
Externí odkaz:
http://arxiv.org/abs/1903.06032