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Different techniques of Glow Discharge AES are described in this paper. The most important parameters at such investigations are: the power of VHF-field, pressure of the inert gas and concentration of the easily ionizable additive, e.g.…

Biological Physics · Physics 2007-07-18 Vasil G. Bregadze , Eteri S. Gelagutashvili , Ketevan J. Tsakadze

We report on thermodynamic and optical measurements of the condensation process of $^4$He in two silica aerogels of same porosity 95%, but different microstructures resulting from different pH during synthesis. For a base-catalyzed aerogel,…

Soft Condensed Matter · Physics 2007-05-23 Thierry Lambert , Florence Despetis , Laurent Puech , Pierre-Etienne Wolf

We investigated the behavior of H$_2$, main constituent of the gas phase in dense clouds, after collision with amorphous solid water (ASW) surfaces, one of the most abundant chemical species of interstellar ices. We developed a general…

Chemical Physics · Physics 2020-03-20 G. Molpeceres , J. Kästner

A new combination of first principle molecular dynamics (MD) simulations with a rate equation model presented in the preceding paper (paper I) is applied to analyze in detail the scattering of argon atoms from a platinum (111) surface. The…

Plasma Physics · Physics 2018-09-10 A Filinov , M Bonitz , D Loffhagen

We probe the physical conditions in high-redshift damped Ly-alpha systems using the observed molecular fraction and the rotational excitation of molecular hydrogen. We report two new detections of H2 at z = 2.402 and 1.989 toward,…

Astrophysics · Physics 2009-11-13 P. Noterdaeme , C. Ledoux , P. Petitjean , F. Le Petit , R. Srianand , A. Smette

We present a study of the adsorption and diffusion of CH4, CO2 and H2 molecules in clathrate hydrates using ab initio van der Waals density functional formalism [Dion et al. Phys. Rev. Lett. 92, 246401 (2004)]. We find that the adsorption…

Materials Science · Physics 2015-05-19 Guillermo Román-Pérez , Mohammed Moiaed , Jose M. Soler , Felix Yndurain

The behavior of silver and lead azides (scaly and threadlike crystals, and compacted powders) in initiation of explosive decomposition by laser pulsed radiation has been investigated. Initiation energy thresholds in irradiation at…

Materials Science · Physics 2010-01-26 G. Damamme , V. M. Lisitsyn , D. Malis , V. P. Tsipilev

Predictions for some experimental physical observables in nucleus-nucleus collisions at RHIC energies are presented. I utilize the previous suggestion that the retarded, by time about 2-3 fm/c, jet absorption in opaque core is a natural…

Nuclear Experiment · Physics 2009-04-29 V. S. Pantuev

We study experimentally fast flames and their transition to detonation in mixtures of methane, ethane, ethylene, acetylene, and propane mixtures with oxygen. Following the interaction of a detonation wave with a column of cylinders of…

Fluid Dynamics · Physics 2015-12-09 Mohamed Saif , Wentian Wang , Andrzej Pekalski , Marc Levin , Matei I. Radulescu

We present observations of methanol lines in a sample of Class 0 low mass protostars. Using a 1-D radiative transfer model, we derive the abundances in the envelopes. In two sources of the sample, the observations can only be reproduced by…

Astrophysics · Physics 2007-05-23 S. Maret , C. Ceccarelli , A. G. G. M. Tielens , E. Caux , B. Lefloch , A. Faure , A. Castets , D. R. Flower

We have observed bursting variability of the 6.7 GHz methanol maser of G33.641-0.228. Five bursts were detected in the observation period of 294 days from 2009 to 2012. The typical burst is a large flux density rise in about one day…

Particle correlation measurements associated with a hard or semi-hard trigger in heavy-ion collisions may reflect Mach cone shockwaves excited in the bulk medium by partonic energy loss. This is of great interest because, when compared with…

Nuclear Theory · Physics 2010-10-27 R. B. Neufeld , Thorsten Renk

We report results of 6.7 GHz methanol maser monitoring of 139 star-forming sites with the Torun 32 m radio telescope from June 2009 to February 2013. The targets were observed at least once a month, with higher cadences of 2-4 measurements…

Astrophysics of Galaxies · Physics 2017-12-20 Marian Szymczak , Mateusz Olech , Rafał Sarniak , Paweł Wolak , Anna Bartkiewicz

Near ultraviolet observations of OH+ and OH in diffuse molecular clouds reveal a preference for different environments. The dominant absorption feature in OH+ arises from a main component seen in CH+ (that with the highest CH+/CH column…

Astrophysics of Galaxies · Physics 2015-06-18 A. J. Porras , S. R. Federman , D. E. Welty , A. M. Ritchey

We present the first study of light induced atom desorption (LIAD) of an alkali atom (Rb) in porous alumina. We observe the variation due to LIAD of the rubidium density in a vapor cell as a function of illumination time, intensity and…

Atomic Physics · Physics 2015-05-14 S. Villalba , H. Failache , A. Lezama

Damped Lyman-$\alpha$ absorbers (DLAs) with molecular hydrogen have been probed in detail through both spectroscopic observations and numerical modelling. However, such H$_2$ absorbers are quite sparse at very high redshifts. We identify…

Astrophysics of Galaxies · Physics 2025-03-20 Aashiya Anitha Shaji , Katherine Rawlins , Pranshu Kurel

Recent observations indicate that organic molecules are prevalent towards starless and prestellar cores. Deuteration of these molecules has not been well-studied during the starless phase. Published observations of singly-deuterated…

Astrophysics of Galaxies · Physics 2020-12-02 Hannah E. Ambrose , Yancy L. Shirley , Samantha Scibelli

The electron assisted low energy $dd$ reactions in deuterized metals are investigated. It is shown that if a metal is irradiated with slow, free deuterons then the $e+d+d\rightarrow e^{\prime }+p+t$ and $e+d+d\rightarrow e^{\prime }+n+$…

General Physics · Physics 2017-01-25 Péter Kálmán , Tamás Keszthelyi

We demonstrate experimentally an enhanced delayed fluorescence in tetracene single crystals strongly coupled to optical modes in open cavities formed by arrays of plasmonic nanoparticles. Hybridization of singlet excitons with collective…

Mesoscale and Nanoscale Physics · Physics 2019-07-23 Matthijs Berghuis , Alexei Halpin , Quynh Le-Van , Mohammad Ramezani , Shaojun Wang , Shunsuke Murai , Jaime Gómez Rivas

We present a numerical study of the structural correlations associated to gas adsorption/desorption in silica aerogels in order to provide a theoretical interpretation of scattering experiments. Following our earlier work, we use a…

Disordered Systems and Neural Networks · Physics 2016-08-31 F. Detcheverry , E. Kierlik , M. L. Rosinberg , G. Tarjus
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