A simple method for absolute normalization of (e, 2e) cross sections

2010 ◽  
Vol 21 (5) ◽  
pp. 055112 ◽  
Author(s):  
L R Hargreaves ◽  
M A Stevenson ◽  
B Lohmann
Keyword(s):  
Cross Sections ◽  
Simple Method ◽  
Absolute Normalization

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 ESTIMATION OF GROSS-STRUCTURE PARAMETERS OF GIANT DIPOLE RESONANCE: 1. A METHOD

2021 ◽  
pp. 104-108
Author(s):  
V.L. Uvarov ◽  
A.A. Zakharchenko
Keyword(s):  
Cross Sections ◽  
Giant Dipole Resonance ◽  
Theoretical Models ◽  
Structure Parameters ◽  
Isotope Production ◽  
Simple Method ◽  
New Approach ◽  
X Ray ◽  
Dipole Resonance ◽  
Considerable Spread

Available data on photonuclear cross-sections, both measured experimentally and obtained on the basis of theoretical models, are characterized sometimes by a considerable spread. In work, a simple method for the estimation of width (FWHM) and maximum (σmax) of excitation function of a reaction with dominant giant dipole resonance, is given. An analytical model is developed for the description of isotope production in an X-ray beam. It is shown, that the established yield of the reaction in a thin target, overlapping completely the beam with known end-point photon energy makes it possible to estimate the σmax and FWHM values. The possibilities of new approach are demonstrated by a numerical experiment on the reference reactions.

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