Difference between revisions of "Doppler Broadening"
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=Theory of Dopler Broadening= | =Theory of Dopler Broadening= | ||
== Photon emmision along direction of fission fragment velocit== | == Photon emmision along direction of fission fragment velocit== |
Revision as of 23:06, 6 October 2008
Spent fuel casket density:
Theory of Dopler Broadening
Photon emmision along direction of fission fragment velocit
= amount of energy the gamma ray was shifted by
where
=- for an excited fragment in det-2
is the polar emission angle of excited fragment and the fragment velocity
Our Calculations
For example for energy E=2617 keV and the fragment velocity v=
We obtained the following results for different angles between the direction of the fission fragment propagation and the direction of the gamma emission
(i)
(ii)
(iii)
FWHM(for energy 2617 keV)=2.5 keV(experimental data)
Energy difference
Photon emission off fission fragment velocity axis
Cf-252 Fission
The table below from http://www-aix.gsi.de/~wolle/ identifies gamma energies (in keV) for several fission fragments of Cf-252.
Photon Spectra from Cf-252
Measurements in the Beam test lab with HpGe and BC408
June 15,2007 Cf-252 measurements with HpGe & neutron sensitive scintillators in coincidence
June 19,2007 Cf-252 measurements with HpGe & neutron sensitive scintillators in coincidence
June 19,2007 Cf-252 measurements of gamma-spectrum using HpGe ungated
June 19, gamma-singles spectra of a Cf-252 source
June 25,2007 Cf-252 measurements of gamma-spectrum using HpGe ungated
June 25,2007 Cf-252 measurements of total gamma-spectrum using HpGe ungated
June 27,2007 Cf-252 measurements with HpGe detector and BC408
July 3,2007 Cf-252 without lead container measurements with HpGe & fast plastic scintillators in coincidence
July 6, 2007 Neutron Capture in lead
July 10, 2007 Division of gated to ungated spectra of Cf-252
July 11, 2007 Experimental setup
Measurements at the IAC
File:HuntsIACgraphs.pdf
File:Promptg02 cf252 IAC.pdf
Details of Cf-252 Source
The manufacturers description of the source File:CF-252-Description.pdf
Gamma and Neutron activity curvesFile:CF-252-gamma-n-activitycurves.pdf