Difference between revisions of "Au-196 Foil-08-22-13"

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=Gold irradiation physics=
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Knock a neutron out of natural gold such that an excited state of Au-196 remains that will undergo electron capture to Pt-196 with a half life of 6 days or 2% of the time it can be left in a meta stable state with two possible half lifes of 8 seconds or 9 hours.
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<math>{197 \atop\; }Au (\gamma,n){196 \atop \; }Au</math>
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The 8 sec metastable state of Au-196 decays through the emission of only one 84.66 keV photon.
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The 9.6 hour metastable state has high intensity gamma lines at 147.81 keV and 188.27 keV. The 147.81 and the 188.27 are in coincidence.
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<math>{196 \atop \; }Au \rightarrow {196 \atop \; }Pt^* </math> with a half life of 6 days.
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The Pt-196 has a 355.73 dominant (100% relative intensity) gamma line that goes to the 256.2 state giving off a 97.3 keV photon
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=Irradiation of foil 130100-009=
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Irradiation finished at August 22, 2013 1:52:41 PM MDT(unix seconds = 1377201161)
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== Half life measurement==
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The 6.1 day half life isotope emits a 333.02 and a 355.73 keV  in coincidence.
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{| border="1"  |cellpadding="20" cellspacing="0
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|-
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|  Run Number || Date (Seconds since 1970)|| Sec since irradiation|| Running Time (sec) || 333.02 Rate || 355.73 rate ||Calibration Desc
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|-
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|5838 || August 26, 2013 11:34:58 AM MDT (1377538498)|| 337337|| 477 || 22 +/- 4 ||  73 +/- 13 || OR, Au Foil 130100-009, only counting with detector 180-3 (no TDC) 8 min 1sec long, 808 Hz, Det B HV OFF, ntuple->Draw("-25.6847+ADC5*0.359504>>(4096,0,4096)")
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|-
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|5852 ||August 27, 2013 4:24:43 PM MDT(1377642283)  ||441122 || 512 || 17 +/- 3 || 58 +/- 8  || Gold Foil 130100-009, only counting with detector 180-3 (no TDC)  7 min 34 sec long,  716 Hz, Det B HV ''' OFF''', ntuple->Draw("-25.6847+ADC5*0.359504>>(4096,0,4096)")
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|-
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|5916 || September 5, 2013 9:14:14 AM MDT (1378394054)|| 1192893|| 620|| 7.5 +/- 1 || 35 +/- 4  || Au foil 130100-009, Using only Det 180-2 (Det B warm), 10 min 25 sec long, 388 Hz
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|-
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|}
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[[File:Au196_halfLife_8-22-13Irad.png | 200 px]]
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[[Media:Au196_halfLife_8-22-13Irad.xmgrace.txt]]
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==Amount of Au-196 produced==
  
  
  
 
[[PAA_8-22-13#Gold_Foil]]
 
[[PAA_8-22-13#Gold_Foil]]

Latest revision as of 22:47, 6 November 2013

Gold irradiation physics

Knock a neutron out of natural gold such that an excited state of Au-196 remains that will undergo electron capture to Pt-196 with a half life of 6 days or 2% of the time it can be left in a meta stable state with two possible half lifes of 8 seconds or 9 hours.

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

The 8 sec metastable state of Au-196 decays through the emission of only one 84.66 keV photon.

The 9.6 hour metastable state has high intensity gamma lines at 147.81 keV and 188.27 keV. The 147.81 and the 188.27 are in coincidence.

[math]{196 \atop \; }Au \rightarrow {196 \atop \; }Pt^* [/math] with a half life of 6 days.

The Pt-196 has a 355.73 dominant (100% relative intensity) gamma line that goes to the 256.2 state giving off a 97.3 keV photon

Irradiation of foil 130100-009

Irradiation finished at August 22, 2013 1:52:41 PM MDT(unix seconds = 1377201161)

Half life measurement

The 6.1 day half life isotope emits a 333.02 and a 355.73 keV in coincidence.

Run Number Date (Seconds since 1970) Sec since irradiation Running Time (sec) 333.02 Rate 355.73 rate Calibration Desc
5838 August 26, 2013 11:34:58 AM MDT (1377538498) 337337 477 22 +/- 4 73 +/- 13 OR, Au Foil 130100-009, only counting with detector 180-3 (no TDC) 8 min 1sec long, 808 Hz, Det B HV OFF, ntuple->Draw("-25.6847+ADC5*0.359504>>(4096,0,4096)")
5852 August 27, 2013 4:24:43 PM MDT(1377642283) 441122 512 17 +/- 3 58 +/- 8 Gold Foil 130100-009, only counting with detector 180-3 (no TDC) 7 min 34 sec long, 716 Hz, Det B HV OFF, ntuple->Draw("-25.6847+ADC5*0.359504>>(4096,0,4096)")
5916 September 5, 2013 9:14:14 AM MDT (1378394054) 1192893 620 7.5 +/- 1 35 +/- 4 Au foil 130100-009, Using only Det 180-2 (Det B warm), 10 min 25 sec long, 388 Hz

Au196 halfLife 8-22-13Irad.png

Media:Au196_halfLife_8-22-13Irad.xmgrace.txt

Amount of Au-196 produced

PAA_8-22-13#Gold_Foil

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