scholarly journals 50 years of electron biprism -50 years of exciting electron physics-

2004 ◽  
Vol 2 ◽  
pp. 52-55
Author(s):  
Hannes Lichte
Keyword(s):  
Exciting Electron

THE EXCITATION OF BAND SPECTRA—ROTATIONAL STRUCTURE

1935 ◽  
Vol 12 (1) ◽  
pp. 6-13 ◽  
Author(s):  
G. O. Langstroth
Keyword(s):  
Excitation Energy ◽  
Electronic Configuration ◽  
Rotational Structure ◽  
Molecular Field ◽  
Exciting Electron ◽  
Band Spectra

An examination of the intensity contours of three second positive nitrogen bands excited by electrons of 14, 15, 16 and 18 electron volts energy, indicates that the contours change in shape as the energy of the exciting electrons is varied. These results and their relation to those of other investigators can be understood if there is a definite probability that an impinging electron will excite the electronic configuration of a molecule and then interact with the rotation before escaping from the molecular field. As might be expected, this probability is appreciable only when the energy of the exciting electron is nearly equal to the excitation energy.

scholarly journals Direct observation of large electron–phonon interaction effect on phonon heat transport

2020 ◽  
Vol 11 (1) ◽  
Author(s):  
Jiawei Zhou ◽  
Hyun D. Shin ◽  
Ke Chen ◽  
Bai Song ◽  
Ryan A. Duncan ◽  
...  
Keyword(s):  
Heat Transport ◽  
Phonon Scattering ◽  
Crystalline Silicon ◽  
Substantial Reduction ◽  
Phonon Transport ◽  
Phonon Interaction ◽  
Electron Phonon Interaction ◽  
Exciting Electron ◽  
Energy Conversion Devices ◽  
The Impact

AbstractAs a foundational concept in many-body physics, electron–phonon interaction is essential to understanding and manipulating charge and energy flow in various electronic, photonic, and energy conversion devices. While much progress has been made in uncovering how phonons affect electron dynamics, it remains a challenge to directly observe the impact of electrons on phonon transport, especially at environmental temperatures. Here, we probe the effect of charge carriers on phonon heat transport at room temperature, using a modified transient thermal grating technique. By optically exciting electron-hole pairs in a crystalline silicon membrane, we single out the effect of the phonon–carrier interaction. The enhanced phonon scattering by photoexcited free carriers results in a substantial reduction in thermal conductivity on a nanosecond timescale. Our study provides direct experimental evidence of the elusive role of electron–phonon interaction in phonon heat transport, which is important for understanding heat conduction in doped semiconductors. We also highlight the possibility of using light to dynamically control thermal transport via electron–phonon coupling.

scholarly journals Revealing the Phenomena of Heat and Photon Energy on Dealing Matter at Atomic Level

2017 ◽  
Author(s):  
Mubarak Ali
Keyword(s):  
Photon Energy ◽  
Atomic Level ◽  
Heat Energy ◽  
Visible Range ◽  
State Electron ◽  
Electron Transitions ◽  
Excitation Period ◽  
Exciting Electron ◽  
Understanding Of Science ◽  
Inter State

Technology is in the way to reach in its climax but the basic understanding of science in many phenomena is still awaited despite the fact that nature witnesses. Scientific research reveals strong analogy between electron and photon. Atoms of solid state behavior that execute suitable electron transitions excite electron at target while absorbing heat energy at shunt level. De-excitation of electron under the pulling force of nearby unfilled state available at bare surface of atom results into depicting force energy shape-like Gaussian distribution called unit photon where inertia involved at each stage of changing state. The continuous cycles of excitation and de-excitation of electron confined within inter-state (filled to unfilled and unfilled to filled) result into generate force energy in wave-like fashion propagating in the inter-state electron’s gap of adjacent atoms in the lattice; in each unit photon, the force energy configures under electron’s trajectory while excitation period is due to inertia-levitation-inertia behaviors and force energy configures under electron’s trajectory while de-excitation period is due to inertia-gravitation-inertia behaviors. Silicon atom is considered as a model system of it. Uninterrupted confined inter-state electron-dynamics results into configure force energy that can travel immeasurable length where interruption from the point of generation termed it an overt photon –a long length photon. Such photons increase wavelength under decreasing energy when travelling in the medium other than inter-state electron’s gap where light glow is observed on attaining wavelength of their certain density in the visible range. They act as merged photons or squeezed photons while interacting (coordinating) to suitable medium, thus, on merging or squeezing convert into heat energy where atoms like silicon again configure them into force energy under the trajectory of electrons. Thus, heat energy dealing to suitable matter at atomic level transforms into photon energy. Involving levitation behavior in the course of exciting electron and gravitation behavior in the course of de-exciting electron validates that force of repulsion or attraction in certain materials engages the phenomenon of levitism or gravitism where inertia is exempted. Here, heat energy and photon energy explore matter at electron level. Thus, devise science to describe.

scholarly journals Excitation and emission in the nitrogen band spectrum

1935 ◽  
Vol 150 (870) ◽  
pp. 371-381 ◽  
Keyword(s):  
Energy Separation ◽  
Band Spectrum ◽  
Electronic Impact ◽  
Exciting Electron ◽  
Molecular Excitation ◽  
Relative Excitation

It has previously been shown that the relative intensities of the 0 → 2, 1 → 3, and 2 → 4 second positive nitrogen bands excited by electronic impact are not changed when the energy of the exciting electrons is varied between 30 and 160 electron volts. The observed variations for energies between 14 and 30 electron volts were quantitatively explained by taking into consideration the effect of the energy separation of the initial vibration levels. A theory of molecular excitation by electronic impact was developed (II), and calculations of the relative excitation and emission probabilities were made. These were based on Hutchisson’s treatment of the harmonic oscillator. The “complete” intensities obtained by combining the two probabilities agreed quite well with the observed values. This article gives the results of measurements of the intensities of nine additional second positive bands for various exciting electron energies between 14 and 160 electron volts.

Charged particles accelerated by wake fields in a dielectric resonator with exciting electron bunch channel

2003 ◽  
Vol 29 (7) ◽  
pp. 589-591 ◽  
Author(s):  
V. A. Balakirev ◽  
I. N. Onishchenko ◽  
D. Yu. Sidorenko ◽  
G. V. Sotnikov
Keyword(s):  
Dielectric Resonator ◽  
Electron Bunch ◽  
Charged Particles ◽  
Exciting Electron ◽  
Wake Fields

scholarly journals New Emission Resonances in Laser-Produced Plasmas on Cesium, Barium and the Lanthanides

1977 ◽  
Vol 43 ◽  
pp. 21-21
Author(s):  
P.K. Carrol ◽  
E.T. Kennedy ◽  
G.D. O'Sullivan
Keyword(s):  
Characteristic Feature ◽  
Emission Spectra ◽  
Strong Emission ◽  
Emission Maximum ◽  
Exciting Electron

Emission spectra of laser-produced plasmas on targets of Cs, Ba and the lanthanides have been studied systematically in the region from 40 - 300Å. In the lighter of these elements the most characteristic feature is a strong emission maximum consisting of a mixture of continuum and discrete lines. The maximum is centered at 102 Å for cesium and moves to shorter wavelength with increasing Z. At praeseodymium a second maximum appears at longer wavelengths and with increasing Z both maxima broaden and eventually form a single continuum. The resonances are interpreted as excitation of 4d10 4fN9 to 4d 4fN+1 followed by re-emission modified by the presence of the exciting electron. The extensive continua which appear with the progressive filling of the f shell, are attributed to brehmstrahlung radiation.

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