Difference between revisions of "DeepBlueMarin 04222013"

From New IAC Wiki
Jump to navigation Jump to search
Line 39: Line 39:
  
 
;Gold lines
 
;Gold lines
 +
 +
Consider the neutron knock out reaction on Gold
 +
 +
<math>{197 \atop\; }Au (\gamma,n){196 \atop \; }Au</math>
 +
 +
Au-196 decays with a half life 6.183 days of by electron capture to Platinum (Pt-196) 92% of the time.
 +
 +
There are two dominant photon energies of 333.03 keV and 355.73 keV.  67% of the time Au-196 goes to the 2+ excited state of Pt-196 after  34.15 ps .  24.7%  of the time it decays to the next higher energy 2+  state of Pt-196  after 33.8 ps and then proceeds to emitt a 333.03 keV photon as it transitions to the lower 2+ state where it will emitt a 355.73 keV photon on its way to the ground state.
 +
 +
  
 
[[File:GoldLinesS333_04222013.png| 200 px]]
 
[[File:GoldLinesS333_04222013.png| 200 px]]

Revision as of 18:08, 9 May 2013

Irradiation of Silver coins from Deep Blue Marin performed on April 22, 2013

Large Coin

Raw Spectrum

04222013 LargeCoin Raw.png

Calibration

04222013 LargeCoin Cal.png 04222013 LargeCoin RawMainPeak.png 04222013 LargeCoin CalMainPeak.png
Linear fit using several sources Zoom in to the most intense line The most intense line seems to be from positron annihilation


Energy Calibrated spectrum

04222013 LargeCoin EnergySpectrum.png


Peak Ratios

Ratio of 511 and

Silver lines
Coin Size 511/451 ratio 511/748 ratio 511/1046 ratio
Large 87740/6639 =13.2 87740/2962=29.6 87740/2803 = 31.3
Medium 31950/2938 =10.9 31950/1239 =25.8 31950/1283=24.9
Small 87090/8184=10.6 87090/3790 =22.98 87090/3578=24.34


Gold lines

Consider the neutron knock out reaction on Gold

[math]{197 \atop\; }Au (\gamma,n){196 \atop \; }Au[/math]

Au-196 decays with a half life 6.183 days of by electron capture to Platinum (Pt-196) 92% of the time.

There are two dominant photon energies of 333.03 keV and 355.73 keV. 67% of the time Au-196 goes to the 2+ excited state of Pt-196 after 34.15 ps . 24.7% of the time it decays to the next higher energy 2+ state of Pt-196 after 33.8 ps and then proceeds to emitt a 333.03 keV photon as it transitions to the lower 2+ state where it will emitt a 355.73 keV photon on its way to the ground state.


GoldLinesS333 04222013.png

Coin Size 333 keV 356 keV 333/356 ratio
Large L333 04222013.png L356 04222013.png 5397/3672=1.47
Medium M333 04222013.png M356 04222013.png 2062/1432=1.44
Small S333 04222013.png S356 04222013.png 5552/3956 =1.40

Rate normalized spectrum

PAA_DeepBlueMarine