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== | ||
| − | <math>E_{shift} = E_{photon} \frac{1-\beta \cos(\theta_{photon}^i)}{\sqrt{1-\beta_i^2}} = amount of energy the gamma ray was shifted by | + | <math>E_{shift} = E_{photon} \frac{1-\beta \cos(\theta_{photon}^i)}{\sqrt{1-\beta_i^2}}</math> = amount of energy the gamma ray was shifted by |
where <math>E_{photon}</math> is the Doppler-shifted <math>\gamma</math>-ray energy which was measured<br> | where <math>E_{photon}</math> is the Doppler-shifted <math>\gamma</math>-ray energy which was measured<br> | ||
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| − | <math>cos\theta_{photon}^i</math>=-<math>cos\theta_{i}</math> for an excited fragment in det-1= angle between momentum of fragment i and the emitted photon<br> | + | <math>cos\theta_{photon}^i</math>=-<math>cos\theta_{i}</math> for an excited fragment in det-1= angle between momentum of fragment <math>i</math> and the emitted photon<br> |
<math>cos\theta_{photon2}</math>=-<math>cos\theta_{2}</math> for an excited fragment in det-2<br> | <math>cos\theta_{photon2}</math>=-<math>cos\theta_{2}</math> for an excited fragment in det-2<br> | ||
Revision as of 02:38, 24 June 2007
Theory of Dopler Broadening
Photon emmision along direction of fission fragment velocit
= amount of energy the gamma ray was shifted by
where is the Doppler-shifted -ray energy which was measured
=- for an excited fragment in det-1= angle between momentum of fragment and the emitted photon
=- for an excited fragment in det-2
is the polar emission angle of excited fragment and the fragment velocity
Photon emission off fission fragment velocity axis
Cf-252 Fission
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