Prädissoziation im elektrischen Feld — ein neues Phänomen in der Molekülspektroskopie

1970 ◽  
Vol 25 (3) ◽  
pp. 406-411
Author(s):  
F. J. Comes ◽  
U. Wenning
Keyword(s):  
Field Strength ◽  
Electric Field ◽  
Linear Function ◽  
External Electric Field ◽  
Excited States ◽  
Coupling Mechanism ◽  
Molecular Dissociation ◽  
Selection Rules ◽  
Molecular Fields

Molecules in certain excited states can be forced to predissociate in an external electric field. This effect will be shown to occur with H2 and D2. The molecular dissociation is made possible by an altered coupling mechanism as compared to the mechanism considered for the Kronig's selection rules. The interaction is a linear function of the field strength. It is further demonstrated that also molecular fields (van der Waal's fields) may cause the effect which is shown by the collision induced predissociation of the excited molecular states under consideration

Electrostatic Forces on Particles Floating Within the Interface Between Two Immiscible Fluids

2007 ◽  
Author(s):  
Nadine Aubry ◽  
Pushpendra Singh
Keyword(s):  
Dielectric Properties ◽  
Field Strength ◽  
Electric Field ◽  
Electric Field Strength ◽  
External Electric Field ◽  
Capillary Force ◽  
Electrostatic Force ◽  
Immiscible Fluids ◽  
Electrostatic Forces ◽  
Dipole Interactions

The objective of this paper is to study the dependence of the electrostatic force that act on a particle within the interface between two immiscible fluids on the parameters such as the dielectric properties of the fluids and particles, the particle’s position within the interface, and the electric field strength. It is shown that the component of electrostatic force normal to the interface varies as a2, where a is the particle radius, and since in equilibrium it is balanced by the vertical capillary force, the interfacial deformation caused by the particle changes when an external electric field is applied. In addition, there are lateral electrostatic forces among the particles due to the dipole-dipole interactions which, when the distance between two particles is O(a), vary as a2, and remain significant for submicron sized particles.

Resonant Microwave Absorption in an Overdense Plasma Column

1980 ◽  
Vol 35 (3) ◽  
pp. 293-301
Author(s):  
G. Böhm
Keyword(s):  
Field Strength ◽  
Electric Field ◽  
Electric Field Strength ◽  
Plasma Column ◽  
Plasma Waves ◽  
Coupling Mechanism ◽  
Resonant Coupling ◽  
Overdense Plasma ◽  
Full Absorption ◽  
High Electric Field Strength

Abstract A resonant coupling mechanism is presented which leads to nearly full absorption of an electromagnetic wave in an overdense plasma column. In the resonance case a strong enhancement of the electric field strength within the plasma is found. Under certain conditions this high electric field strength causes parametric excitation of plasma waves in the underdense edges of the discharge. It turned out that the occurance of this decay process is mainly determined by the density gradients in the plasma.

scholarly journals Droplets generation conducting during laser-plasma treating of metals in electric field

2021 ◽  
Vol 2064 (1) ◽  
pp. 012097
Author(s):  
A Yu Ivanov ◽  
A L Sitkevich ◽  
S V Vasil’ev
Keyword(s):  
Laser Radiation ◽  
Field Strength ◽  
Electric Field ◽  
External Electric Field ◽  
Short Circuit ◽  
Characteristic Size ◽  
Electric Breakdown ◽  
Laser Plume ◽  
Initial Stage ◽  
The Mean

Abstract Evolution of plasma plume generation on the surface of metal irradiated by laser beam with the mean radiation flux density ~ 106 W/cm2 in the external electric field with different polarity and field strength from 0 to 106 V/m was experimentally investigated. It is shown that the mean size of metal droplets carried out from the irradiated zone of target becomes materially (in several times) smaller when of the external electric field strength amplitude grow, independently to its polarity. It is essential that the mentioned differences (at the considered parameters of laser radiation) are observed only at the initial stage of the laser plume development, because after the steam-plasma cloud reaches the electrode an electric breakdown (short-circuit) occurs, and the external field in the interelectrode gap disappears. Electric breakdown leads to the spasmodic increase of electron density and temperature of plasma and to effective absorption of laser radiation by plasma torch (shielding of the target). In consequence of shielding droplets generation happens only during electric field existence. This explains decrease by several times of the characteristic size of the target substance droplets in spite of short duration of electric field existence.

The Excited States Structure and Spectroscopy Properties for Ti2O4Cluster under an External Electric Field

2015 ◽  
Vol 21 (1) ◽  
pp. 39-43
Author(s):  
郝进欣 HAO Jin-xin ◽  
吴永刚 WU Yong-gang ◽  
李世雄 LI Shi-xiong ◽  
孙光宇 SUN Guang-yu ◽  
令狐荣锋 LINGHU Rong-feng
Keyword(s):  
Electric Field ◽  
External Electric Field ◽  
Excited States

PERTURBED WAVEFUNCTIONS OF THE EXCITED STATES OF HYDROGEN ATOM IN STARK EFFECT

1994 ◽  
Vol 08 (06) ◽  
pp. 727-740 ◽  
Author(s):  
G. K. SAPRA ◽  
V. S. BHASIN ◽  
L. S. KOTHARI
Keyword(s):  
Hydrogen Atom ◽  
Electric Field ◽  
External Electric Field ◽  
Excited States ◽  
Ground State ◽  
Stark Effect ◽  
Second Order ◽  
Electric Polarizability ◽  
Perturbation Equations

We extend the procedure originally suggested by Dalgarno and Lewis in studying the second-order Stark effect for the ground-state hydrogen atom to the excited states. We solve the perturbation equations for the excited states of hydrogen atom placed in an external electric field to obtain expressions for the perturbed wavefunctions. Here the emphasis is on studying in detail the nature of the perturbed wavefunction rather than energy shifts as investigated in most of the attempts made so far. The effect of the electric field on these wavefunctions is analysed and the values of the electric polarizability of the hydrogen atom in the excited states obtained in this way are compared with the earlier work.

scholarly journals Excited states structure for methyl acrylate under external electric field

2011 ◽  
Vol 60 (9) ◽  
pp. 093102
Author(s):  
Zhou Ye-Hong ◽  
He Jian-Yong ◽  
Cai Shao-Hong
Keyword(s):  
Electric Field ◽  
External Electric Field ◽  
Excited States ◽  
Methyl Acrylate

scholarly journals The effect of external electric field on the excited states of plutonium dihydride

2006 ◽  
Vol 55 (5) ◽  
pp. 2180
Author(s):  
Xie An-Dong ◽  
Meng Da-Qiao ◽  
Luo De-Li ◽  
Ma Mei-Zhong ◽  
Zhu Zheng-He
Keyword(s):  
Electric Field ◽  
External Electric Field ◽  
Excited States
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