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Author Singh, Amrit ♦ Dhaliwal, A. S.
Source United States Department of Energy Office of Scientific and Technical Information
Content type Text
Language English
Subject Keyword NUCLEAR PHYSICS AND RADIATION PHYSICS ♦ BETA PARTICLES ♦ BETHE-HEITLER THEORY ♦ BREMSSTRAHLUNG ♦ COMPARATIVE EVALUATIONS ♦ ELECTRON REACTIONS ♦ KEV RANGE ♦ LI-DRIFTED SI DETECTORS ♦ MOLYBDENUM ISOTOPES ♦ PHOTONS ♦ PLATINUM ISOTOPES ♦ POLARIZATION ♦ RELATIVISTIC RANGE ♦ STRONTIUM 90
Abstract Bremsstrahlung spectra in thick targets of Mo and Pt, produced by beta emitter {sup 90}Sr (end point energy = 546 keV) have been studied in the photon energy range of 1-100 keV. The experimentally measured bremsstrahlung spectra measured with Si(Li) detector were compared with the theoretical spectral distributions calculated from Elwert corrected (non relativistic) Bethe-Heitler [EBH] theory, modified Elwert factor (relativistic) Bethe-Heitler (F{sub mod}BH) theory for ordinary bremsstrahlung (OB) and the modified Elwert factor (relativistic) Bethe-Heitler (F{sub mod}BH+PB) theory, which includes the polarization bremsstrahlung (PB) into total bremsstrahlung (BS). The present results indicate the correctness of F{sub mod}BH+PB theory in the low energy region, where the contributions of PB into BS are dominant, which is described in terms of stripped atom (SA) approximation. But at the middle and higher energy region of the bremsstrahlung spectrum, where the contribution of PB is negligible, the F{sub mod}BH theory is more close to the experimental results. Hence, it is clear that the production of PB in the low energy region, due to the dynamic response of the target atom suppresses the production of bremsstrahlung at higher energy ends.
ISSN 0094243X
Educational Use Research
Learning Resource Type Article
Publisher Date 2015-08-28
Publisher Place United States
Volume Number 1675
Issue Number 1


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