Critical fields for ionization of the hydrogen molecule and the molecular hydrogen ion

1997 ◽  
Vol 85 (3) ◽  
pp. 447-450 ◽  
Author(s):  
M. B. Smirnov ◽  
V. P. Krainov
Keyword(s):  
Molecular Hydrogen ◽  
Hydrogen Molecule ◽  
Hydrogen Ion ◽  
Critical Fields

EFFECTS OF COMPLEXING ON THE HOMOGENEOUS REDUCTION OF MERCURIC SALTS IN AQUEOUS SOLUTION BY MOLECULAR HYDROGEN

1956 ◽  
Vol 34 (10) ◽  
pp. 1372-1381 ◽  
Author(s):  
G. J. Korinek ◽  
J. Halpern
Keyword(s):  
Aqueous Solution ◽  
Molecular Hydrogen ◽  
Hydrogen Molecule ◽  
Bimolecular Reaction ◽  
Mercury Atom ◽  
Complexing Agents ◽  
Mercuric Ion ◽  
Rate Determining Step ◽  
Homogeneous Reduction

The effects of various complexing agents on the homogeneous reduction of mercuric salts by molecular hydrogen in aqueous solution were determined. In all cases the kinetics suggest that the rate-determining step is a bimolecular reaction between a mercuric ion or complex and a hydrogen molecule, probably leading to the formation of an intermediate mercury atom. The reactivity of various mercuric complexes was found to decrease in the following order: HgSO4 > Hg++ > HgAc2, HgPr2 > HgCl2 > HgBr2 > Hg(EDA)2++. Addition of anions such as OH−, CO3=, Ac−, Pr−, and Cl−, in excess of the amounts required to form stable mercuric complexes, was found to increase the rate. An interpretation of these effects is given.

scholarly journals The band spectrum of hydrogen

1924 ◽  
Vol 106 (735) ◽  
pp. 69-82 ◽  
Keyword(s):  
Molecular Hydrogen ◽  
Hydrogen Molecule ◽  
Spectral Lines ◽  
Wave Number ◽  
Band Spectrum ◽  
Wave Numbers ◽  
Experimental Side ◽  
The Subject ◽  
The Moment ◽  
Theoretical Side

Many attempts have been made to detect regularities amongst the numerous lines which constitute the secondary or many-lined spectrum of hydrogen. The extreme complexity of the spectrum may be realised from the fact that in the Bakerian Lecture of 1922 Merton and Barratt record some 750 lines in the interval between Hα (wave-number v = 5233.216) and Hβ ( v = 20564.793). Three methods of investigation may be employed in the search for regularities. (1) The lines may be classified according to their physical characteristics, such as intensity or mode of excitation, as in the tables of Merton and Barrat ( loc. cit .). (2) Lines may be grouped together by the discovery of relations between their wave-lengths or wave-numbers, as in the important groups of lines which have been arranged in bands by Fulcher. (3) Lastly, the question may be attacked from the theoretical side, and a model of the hydrogen molecule may be imagined, which will give rise to the emission of certain characteristic spectral lines. Thus Sutherland, working on the foundation of the classical mechanical laws, more than twenty years ago, came to the conclusion that spectral series must arise from kinematical considera­tions, and explained them by considering the nodal sub-divisions of a circle. At the present time we may expect more successful results to follow from the application of the quantum theory, and in this paper an endeavour will be made to examine the secondary spectrum of hydrogen, and more particularly the Fulcher bands, from this standpoint. I may add that my interest in the subject was aroused when attempting to construct a model of the hydrogen molecule, for it seemed that the most likely method of obtaining reliable information from the experimental side as to the moment of inertia of the molecule would be from a study of the spectrum of molecular hydrogen.

The Influence Of Silicon Orientation On Surface Blistering Behaviors for Molecular Hydrogen Ion Implantation

2019 ◽  
Vol 34 (1) ◽  
pp. 1159-1164
Author(s):  
Yu Cheng Hsiao ◽  
Jenq-Horng Liang ◽  
Chih-Ming Lin
Keyword(s):  
Ion Implantation ◽  
Molecular Hydrogen ◽  
Hydrogen Ion ◽  
Hydrogen Ion Implantation

scholarly journals Spectroscopy of a rotating hydrogen molecule in carbon nanotubes

2019 ◽  
Vol 21 (7) ◽  
pp. 3423-3430 ◽  
Author(s):  
María Pilar de Lara-Castells ◽  
Alexander O. Mitrushchenkov
Keyword(s):  
Carbon Nanotubes ◽  
Molecular Hydrogen ◽  
Hydrogen Molecule ◽  
Energy Levels

Computing the energy levels of molecular hydrogen rotating in carbon nanotubes of increasing size.

scholarly journals First-Principles Study of Molecular Adsorption of Hydrogen/s on Co-Adatom Graphene

2020 ◽  
Vol 25 (1) ◽  
pp. 15-23
Author(s):  
Nurapati Pantha ◽  
Saroj Thapa ◽  
Narayan Prasad Adhikari
Keyword(s):  
Magnetic Properties ◽  
Binding Energy ◽  
First Principles ◽  
Molecular Hydrogen ◽  
Density Functional ◽  
Hydrogen Molecule ◽  
Cobalt Atom ◽  
Electronic Charge ◽  
Practical Applications ◽  
Electronic And Magnetic Properties

The study of graphene and its allotropes help to understand fundamental science and their role in the industry. The adsorption of transition metal adatom on mono-layer graphene can tune the geometrical, electronic, and magnetic properties of the material according to the requirement for the practical applications. In the present work, the geometrical stability, electronic and magnetic properties, and also the redistribution of electronic charge of single cobalt atom (Co) adsorbed graphene with reference to pure graphene have been investigated to develop a model system for the effective storage of hydrogen. The density functional theory (DFT) based first-principles calculations by incorporating van der Waals (VDW) interactions within DFT-D2 levels of approximation implemented in the quantum ESPRESSO package was used. The band structure and density of states of cobalt-adatom graphene show that the material is metallic and magnetic with a total magnetic moment of 1.55 μB. The change in the electronic distribution of Co-adatom graphene has been found favorable for adsorbing molecular hydrogen/s with greater strength. The increasing number of adsorbed molecular hydrogen/s (n=1 to 7) onto the substrate shows varying binding energy per hydrogen molecule, high enough at low concentration (n=1, 2, and 3), and then decreases slowly on increasing the value of n. The nature of adsorption and binding energy per hydrogen molecule (with a range of 0.116 - 0.731 eV/ H2) are found useful to meet a standard target for hydrogen storage in such materials.

Dynamic dressing of molecular hydrogen ion in intense femtosecond laser pulses

2003 ◽  
Vol 50 (3-4) ◽  
pp. 485-495 ◽  
Author(s):  
L. J. Frasinski ◽  
C. R. Courtney ◽  
K. Codling
Keyword(s):  
Femtosecond Laser ◽  
Molecular Hydrogen ◽  
Laser Pulses ◽  
Femtosecond Laser Pulses ◽  
Hydrogen Ion

scholarly journals Extracting the Ionization Rate From Photoelectron Momentum Distribution Induced by Circularly Polarized Laser Pulse

10.29007/62hv ◽  
2020 ◽  
Author(s):  
Nguyen Thanh Vinh Pham ◽  
Oleg I. Tolstikhin ◽  
Toru Morishita
Keyword(s):  
Laser Pulse ◽  
Momentum Distribution ◽  
Laser Field ◽  
Molecular Hydrogen ◽  
Molecular System ◽  
Ionization Rate ◽  
Transverse Plane ◽  
Hydrogen Ion ◽  
Circularly Polarized ◽  
Adiabatic Theory

In this paper, the adiabatic theory is implemented to consider the ionization process of molecular system exposed to circularly polarized laser pulse. The photoelectron momentum distribution exhibits strong evidence of the properties of the molecular orbital. We also present the possibility to retrieve the ionization rate of the ionized electron from photoelectron momentum distribution in the transverse plane respecting to the polarized plane of the laser field. These results are vital in the viewpoint of the experiment. Several states of molecular hydrogen ion are considered for illustration.

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