Difference between revisions of "Run6973 BckGrd"

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<math>{152 \atop \; }Eu \rightarrow {152 \atop \; }Sm^* + e^+ + \gamma</math> with a half life of 13 years.
+
<math>{152 \atop \; }Eu \rightarrow {152 \atop \; }Sm + e^+ + \gamma</math> with a half life of 13 years.
  
 
gamma lines are at : 386, 493
 
gamma lines are at : 386, 493

Revision as of 22:58, 26 December 2013

Run 6973

The following lines were observed by the HpGe detector.

387, 583, 609, 1273, 1456, 1591, 2103

R6973 HpGe raw.pngR6973 NaI raw.png


NaI 511 coincidence cut

Place a cut around the 511 keV photons seen in the NaI detector yields the following lines observed by the HpGe detector as shown below.

(386, 438, 491, 511, 582, 950, 1255, 1273, 1591, 2103 keV)

R6973 HpGe NaI511CoinCut.pngR6973 HpGe NaI511CoinCutLog.png


[math]{152 \atop \; }Eu \rightarrow {152 \atop \; }Sm + e^+ + \gamma[/math] with a half life of 13 years.

gamma lines are at : 386, 493

NaI 2103 Coincidence cut

Place a cut around the 2103 keV photons seen in the NaI detector yields a 511 and a 583 keV line observed by the HpGe detector as shown below.

R6973 HpGe NaI2103CoinCut.png A line at 388 keV

Possible Isotopes
U-235 (388 - 142,64.5)
Cf-249 (many coincidence lines)

A clear 511 line

NaI cut on 2100 keV intensifies 511 keV line,

ntuple->Draw("ADC7*0.604262-54.0539-ADC7*ADC7*5.62792e-07 >>(2200,0,4400)","ADC3>1600 & ADC3<1800")

A line at 609 keV

Possible isotopes
Pa-231


A line at 1273 keV

A line at 1593 keV


A line at 2105 keV


PAA_11-11-13#Background_coincidence_lines