Difference between revisions of "Doppler Broadening"
Jump to navigation
Jump to search
| Line 3: | Line 3: | ||
<math>E_{shift} = E_{photon} \frac{1-\beta \cos(\theta_{photon})}{\sqrt{1-\beta_i^2}}</math> | <math>E_{shift} = E_{photon} \frac{1-\beta \cos(\theta_{photon})}{\sqrt{1-\beta_i^2}}</math> | ||
| − | <math>cos\theta_{photon1}</math> | + | where <math>E_{photon}</math> is the measured Doppler-shifted <math>\gamma</math>-ray energy<br> |
| + | |||
| + | |||
| + | <math>cos\theta_{photon1}</math>=-<math>cos\theta_{1}</math> for an excited fragment in det-1<br> | ||
| + | <math>cos\theta_{photon2}</math>=-<math>cos\theta_{2}</math> for an excited fragment in det-2<br> | ||
| + | |||
| + | |||
| + | <math>\theta_i</math> is the polar emission angle of excited fragment and <math>\beta</math> the fragment velocity<br> | ||
== Photon emission off fission fragment velocity axis== | == Photon emission off fission fragment velocity axis== | ||
Revision as of 01:55, 24 June 2007
Theory of Dopler Broadening
Photon emmision along direction of fission fragment velocit
where is the measured Doppler-shifted -ray energy
=- for an excited fragment in det-1
=- 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