scholarly journals Electron and photon scattering on three-nucleon bound states

2005 ◽  
Vol 415 (2-3) ◽  
pp. 89-205 ◽  
Author(s):  
J. Golak ◽  
R. Skibiński ◽  
H. Witała ◽  
W. Glöckle ◽  
A. Nogga ◽  
...  
Keyword(s):  
Bound States ◽  
Photon Scattering ◽  
Electron And Photon

A unified description of spectroscopic interferences in predissociation

1977 ◽  
Vol 55 (1) ◽  
pp. 1-22 ◽  
Author(s):  
Jean-Pierre Laplante ◽  
André D. Bandrauk ◽  
Cosmo Carlone
Keyword(s):  
General Theory ◽  
Cross Sections ◽  
Scattering Theory ◽  
Bound States ◽  
Total Absorption ◽  
Photon Scattering ◽  
Simple Method ◽  
Complex Eigenvalues ◽  
Unified Description

A general theory of spectroscopic interferences for predissociating systems is developed using scattering theory. The introduction of complex bound states with complex eigenvalues results in a simple method for the derivation of total absorption, predissociation, and photon scattering (Raman) cross sections. The validity of other formalisms for these interferences, including Fano lineshapes, is examined and cases of spectroscopic interest are pointed out.

scholarly journals Cherenkov radiation from electrons passing through human tissue

2017 ◽  
Vol 10 (01) ◽  
pp. 1650055 ◽  
Author(s):  
Pavel Lukin ◽  
Izmail Batkin ◽  
Alexandr N. Almaliev ◽  
Tatyana A. Churakova ◽  
Mikhail A. Dolgopolov ◽  
...  
Keyword(s):  
Monte Carlo Simulation ◽  
Monte Carlo ◽  
Optical Properties ◽  
Cherenkov Radiation ◽  
Photon Emission ◽  
Relativistic Electrons ◽  
Human Tissues ◽  
Photon Scattering ◽  
Electron And Photon ◽  
Visible Photon

A method for investigating the optical properties of human tissues is suggested. The method is based on the measurement of Cherenkov radiation produced by relativistic electrons passing through the tissue. Monte-Carlo simulation of visible photon emission and propagation is carried out taking into account multiple electron and photon scattering processes. Sensitivity of the Cherenkov radiation to the optical characteristics of human tissues is demonstrated.

scholarly journals Probing electronic and vibrational dynamics in molecules by time-resolved photoelectron, Auger-electron, and X-ray photon scattering spectroscopy

2015 ◽  
Vol 177 ◽  
pp. 405-428 ◽  
Author(s):  
Kochise Bennett ◽  
Markus Kowalewski ◽  
Shaul Mukamel
Keyword(s):  
Degrees Of Freedom ◽  
Golden Rule ◽  
Photoelectron Spectra ◽  
Photon Scattering ◽  
Vibrational Dynamics ◽  
Time Resolved ◽  
Limiting Case ◽  
Electron And Photon ◽  
Unified Description ◽  
Different Levels

We present a unified description for time-resolved electron and photon scattering spectroscopies from molecules prepared in nonstationary states. Signals are expressed in terms of superoperator Green's functions and a systematic procedure for treating various degrees of freedom consistently at different levels of theory is developed. The standard Fermi Golden Rule expressions for photoelectron spectra, which are limited to broad, slowly-varying signals, are obtained as a limiting case of our more general theory that applies to broader parameter regimes.

Recent Radiative and Collisional Atomic Data of Astrophysical Interest

1988 ◽  
Vol 102 ◽  
pp. 129-132
Author(s):  
K.L. Baluja ◽  
K. Butler ◽  
J. Le Bourlot ◽  
C.J. Zeippen
Keyword(s):  
Mass Production ◽  
Bound States ◽  
Physical Models ◽  
Impact Excitation ◽  
Electron Impact Excitation ◽  
Atomic Data ◽  
Isoelectronic Sequence ◽  
Astrophysical Interest ◽  
Radiative Transitions ◽  
Forbidden Transitions

SummaryUsing sophisticated computer programs and elaborate physical models, accurate radiative and collisional atomic data of astrophysical interest have been or are being calculated. The cases treated include radiative transitions between bound states in the 2p4and 2s2p5configurations of many ions in the oxygen isoelectronic sequence, the photoionisation of the ground state of neutral iron, the electron impact excitation of the fine-structure forbidden transitions within the 3p3ground configuration of CℓIII, Ar IV and K V, and the mass-production of radiative data for ions in the oxygen and fluorine isoelectronic sequences, as part of the international Opacity Project.

Radiation-induced surface decomposition

1983 ◽  
Vol 41 ◽  
pp. 368-369
Author(s):  
M. L. Knotek
Keyword(s):  
Ionizing Radiation ◽  
Atomic Structure ◽  
Chemical Bonding ◽  
Neutral Species ◽  
Radiation Induced ◽  
Physical And Chemical ◽  
Surface Decomposition ◽  
The Relationship ◽  
Electron And Photon ◽  
Surface Bond

Modern surface analysis is based largely upon the use of ionizing radiation to probe the electronic and atomic structure of the surfaces physical and chemical makeup. In many of these studies the ionizing radiation used as the primary probe is found to induce changes in the structure and makeup of the surface, especially when electrons are employed. A number of techniques employ the phenomenon of radiation induced desorption as a means of probing the nature of the surface bond. These include Electron- and Photon-Stimulated Desorption (ESD and PSD) which measure desorbed ionic and neutral species as they leave the surface after the surface has been excited by some incident ionizing particle. There has recently been a great deal of activity in determining the relationship between the nature of chemical bonding and its susceptibility to radiation damage.

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