Difference between revisions of "Doppler Broadening"

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<math>\theta_i</math> is the polar emission angle of excited fragment and <math>\beta</math> the fragment velocity<br>
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<math>\theta_i</math> is the polar emission angle of excited fragment and <math>\beta_i</math> the fragment velocity<br>
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<math>\beta_i</math>=0.04634{\sqrt{E_i[MeV]}}
  
 
== Photon emission off fission fragment velocity axis==
 
== Photon emission off fission fragment velocity axis==

Revision as of 02:17, 24 June 2007

Theory of Dopler Broadening

Photon emmision along direction of fission fragment velocit

[math]E_{shift} = E_{photon} \frac{1-\beta \cos(\theta_{photon})}{\sqrt{1-\beta_i^2}}[/math]

where [math]E_{photon}[/math] is the measured Doppler-shifted [math]\gamma[/math]-ray energy


[math]cos\theta_{photon1}[/math]=-[math]cos\theta_{1}[/math] for an excited fragment in det-1
[math]cos\theta_{photon2}[/math]=-[math]cos\theta_{2}[/math] for an excited fragment in det-2


[math]\theta_i[/math] is the polar emission angle of excited fragment and [math]\beta_i[/math] the fragment velocity


[math]\beta_i[/math]=0.04634{\sqrt{E_i[MeV]}}

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