Difference between revisions of "R5718-5716 Ba133Analysis"

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=Coincidence lines for Ba-133=
+
=Ba-133 source lines=
  
−
#276 && 306 keV lines  http://www.nndc.bnl.gov/nsr/nsrlink.jsp?1995JU02
+
 
−
#Ba-132 83 && 360 http://www.nndc.bnl.gov/nsr/nsrlink.jsp?1996KU01        http://www.nndc.bnl.gov/nsr/nsrlink.jsp?2002GA01
+
[[File:Ba-133_ecapture.png| 400 px]]
−
#Ba-132 383 && 515 http://www.nndc.bnl.gov/nsr/nsrlink.jsp?1975GI11
+
 
 +
Ba-133 undergoes electron capture to Cs-133.  86% of the time it ends up in the 1/2+ , 437 keV excited state of Cs-133.
 +
 
 +
{| border="1"  |cellpadding="20" cellspacing="0
 +
|-
 +
|  Energy(keV)  ||  Intensity(rel)
 +
|-
 +
| 53.1625( 6)  ||2.199(22)
 +
|-
 +
| 79.6139(13)  || 2.62( 6)
 +
|-
 +
| 80.9971(12) || 34.06(27)
 +
|-
 +
| 160.6109(17)  || 0.645( 8)
 +
|-
 +
| 223.2373(14)  || 0.450( 4)
 +
|-
 +
| 276.3997(13)  || 7.164(22)
 +
|-
 +
| 302.8510( 6)  || 18.33( 6)
 +
|-
 +
| 356.0134( 6) || 62.05(19)
 +
|-
 +
|  383.8480(12)    ||    8.94( 3)
 +
|-
 +
|}
  
 
=Run list=
 
=Run list=
Line 18: Line 43:
 
[[File:r5716-5718_Ba-133Coinc.png | 200 px]]   
 
[[File:r5716-5718_Ba-133Coinc.png | 200 px]]   
  
−
==Singles Run 5718 Analsysis==
+
==Singles Run 5718 Analysis==
  
 
Photons from the source
 
Photons from the source
Line 29: Line 54:
  
  
−
Ba-133 undergoes electron capture to Cs-133.  86% of the time it ends up in the 1/2+ , 437 keV excited state of Cs-133.
 
  
−
  Energy(keV)    Intensity(rel)
 
−
  53.1625( 6)    2.199(22)
 
−
  79.6139(13)      2.62( 6)
 
−
  80.9971(12)    34.06(27)
 
−
  160.6109(17)    0.645( 8)
 
−
  223.2373(14)    0.450( 4)
 
−
  276.3997(13)    7.164(22)
 
−
  302.8510( 6)    18.33( 6)
 
−
  356.0134( 6)    62.05(19)
 
−
  383.8480(12)      8.94( 3)
 
−
  632.5(10)      100   
 
  
 +
Did not observe the 160, 223, lines. The 160 and 223 keV lines have very small relative intensities and are probably in the noise.
  
−
Did not observe the 53,79,160, 223, lines
+
===Lines observed===
  
 
{| border="1"  |cellpadding="20" cellspacing="0  
 
{| border="1"  |cellpadding="20" cellspacing="0  
Line 59: Line 73:
 
|-
 
|-
 
| 384 || Medium, likely the 383.8480 line from the 3/2+ (383 keV) excited state of Cs-133 to the ground state
 
| 384 || Medium, likely the 383.8480 line from the 3/2+ (383 keV) excited state of Cs-133 to the ground state
 +
|-
 +
| 437 ||
 
|-
 
|-
 
| 510 || Weak
 
| 510 || Weak
Line 66: Line 82:
 
| 609 ||  
 
| 609 ||  
 
|-
 
|-
−
| 913 ||  
+
| 911 ||  
 +
|-
 +
| 1121 ||
 +
|-
 +
| 1277 || Possibly Na-22 there is a 511 keV line.
 +
|-
 +
| 1460 || Possibly Eu-148 or Tm-168.  Eu-148 has a very strong line at 630 keV and 550 keV but it is not seen.  Tm-168 has a strong line at 731 but this is not observed.
 +
|-
 +
|}
 +
 
 +
==Coincidence Run 5716 Analysis==
 +
 
 +
 
 +
{| border="1"  |cellpadding="20" cellspacing="0
 
|-
 
|-
−
| 970 ||  
+
| <math>E_{\gamma}</math> || Energy of coincidence photon (decay time in seconds)
 +
|-
 +
|  53.1622|| 79.6142 (2.16E-10), 80.9979 (6.49E-9), 160.6120 (2.16E-10), 223.2368 (4.39E-11), 302.8508 (4.39E-11), 383.8485 (4.39E-11)
 +
|-
 +
|  79.6142 ||53.1622 (2.16E-10), 80.9979 (6.28E-9), 223.2368 (1.72E-10), 276.3989 (1.72E-10)
 
|-
 
|-
−
| 913 ||  
+
|   80.9979 ||53.1622 (6.49E-9), 79.6142 (6.28E-9), 223.2368 (6.45E-9), 276.3989 (6.45E-9), 302.8508 (6.28E-9), 356.0129 (6.28E-9)
 
|-
 
|-
−
| 970 ||  
+
|   160.6120|| 53.1622 (2.16E-10), 223.2368 (1.72E-10), 276.3989 (1.72E-10)
 
|-
 
|-
−
| 911 ||  
+
|   223.2368|| 53.1622 (4.39E-11), 79.6142 (1.72E-10), 80.9979 (6.45E-9), 160.6120 (1.72E-10)
 
|-
 
|-
−
| 970 ||  
+
|   276.3989|| 79.6142 (1.72E-10), 80.9979 (6.45E-9), 160.6120 (1.72E-10)
 
|-
 
|-
−
| 1121 ||  
+
|   302.8508 ||53.1622 (4.39E-11), 80.9979 (6.28E-9)
 
|-
 
|-
−
| 1277 ||  
+
|   356.0129 ||80.9979 (6.28E-9)
 
|-
 
|-
−
| 1417 ||  
+
|   383.8485|| 53.1622 (4.39E-11)
 
|-
 
|-
 
|}
 
|}
  
−
==Coincidence Run 5716 Analysis==
+
===Time Spectrum===
 +
 
 +
;Singles Run 5718
 +
 
 +
[[File:r5718Det180-2Time.png | 200 px]]
 +
 
 +
[[File:r5718TimeDiff.png | 200 px]][[File:r5718TimeDiffZoom.png | 200 px]]
 +
 
 +
;Coincidence Run 5716 (10 nsec timing window)
 +
 
 +
[[File:r5716TimeDiff.png | 200 px]][[File:r5716TimeDiffZoom.png | 200 px]]
 +
 
 +
===Photons in Coincidence ===
 +
 
 +
 
 +
The 81 keV and 356 keV lines are the strongest and, when they occur in coincidence, they represent the transition from the 436 keV excited state of Cs-133 to the 81 keV excited state and then the ground state.
 +
 
 +
If I put a cut on the strongest line (356 keV) observed by Det B and ask what photon energies are observed in coincidence (timing window of 53 ns) with the other HpGe detector (Detector 180-2) I see the spectrum
 +
 
 +
7 hour Coinc run 5716 (timing window of 10 ns)
 +
 
 +
[[File:r5716_356Coin.png | 200 px]]
 +
[[File:r5716_DetB356Coin.png | 200 px]]
 +
[[File:r5716_356CoinOverlay.png | 200 px]]
 +
 
 +
2 minute Singles Run 5718 (timing window of 53 ns)
 +
 
 +
[[File:r5718_356Coin.png | 200 px]]
 +
 
 +
 
 +
 
 +
Perform a similar analysis but require a 276 keV photon in Det. B.  You should see a 160 keV photon in coincidence come out of the compton scattered photon "background".
 +
 
 +
[[File:r5716_276CoinOverlay.png | 200 px]]
 +
 
 +
Can almost see the 160 keV line (need more statistics)
 +
 
 +
 
 +
 
 +
 
 +
 
 +
 
 +
 
 +
 
 +
#276 && 306 keV lines  http://www.nndc.bnl.gov/nsr/nsrlink.jsp?1995JU02
 +
#Ba-132  83 && 360  http://www.nndc.bnl.gov/nsr/nsrlink.jsp?1996KU01        http://www.nndc.bnl.gov/nsr/nsrlink.jsp?2002GA01
 +
#Ba-132 383 && 515  http://www.nndc.bnl.gov/nsr/nsrlink.jsp?1975GI11
  
−
The 83,
 
  
  
 
[[PAA_CoincidenceCounting#Coincidence_lines_for_Eu-152]]
 
[[PAA_CoincidenceCounting#Coincidence_lines_for_Eu-152]]

Latest revision as of 21:05, 28 August 2013

Ba-133 source lines

Ba-133 ecapture.png

Ba-133 undergoes electron capture to Cs-133. 86% of the time it ends up in the 1/2+ , 437 keV excited state of Cs-133.

Energy(keV) Intensity(rel)
53.1625( 6) 2.199(22)
79.6139(13) 2.62( 6)
80.9971(12) 34.06(27)
160.6109(17) 0.645( 8)
223.2373(14) 0.450( 4)
276.3997(13) 7.164(22)
302.8510( 6) 18.33( 6)
356.0134( 6) 62.05(19)
383.8480(12) 8.94( 3)

Run list

Run Description
5716 Coincidences for Ba-133 10 uCi source. The CFD widths were 10 nsec making the coincidence window 20 nsec. running time 7 hrs , 33 min, 14sec. Rate was 1 Hz
5718 Logic Unit in OR mode for Ba-133 10 uCi source. The CFD widths were 10 nsec making the coincidence window 20 nsec. running time 2 min, 5 sec. Rate was 4 kHz

R5716-5718 Ba-133Coinc.png

Singles Run 5718 Analysis

Photons from the source

ntuple->Draw("(ADC5-62.1537)/2.82207 >>(4096,0,4096)")

ntuple->Draw("(ADC9-39.8)/2.61747 >>(4096,0,4096)")




Did not observe the 160, 223, lines. The 160 and 223 keV lines have very small relative intensities and are probably in the noise.

Lines observed

Photon Energy (keV) Description
82 Strong, probably the 80.9971 line from the 5/2+ to 7/2+ Cs-133 transition
277 Medium, probably the 276.3997 line from the 1/2+(437 keV) to the 5/2+ (161 keV) Cs-133 transition
303 Medium, probably the 302.8510 line from the 3/2+(383 keV) to 5/2+ (81 keV) Cs-133 transition
356 Strong, likely the 356.0134 line from the 1/2+(437 keV) to 5/2+ (81 keV) Cs-133 transition
384 Medium, likely the 383.8480 line from the 3/2+ (383 keV) excited state of Cs-133 to the ground state
437
510 Weak
584
609
911
1121
1277 Possibly Na-22 there is a 511 keV line.
1460 Possibly Eu-148 or Tm-168. Eu-148 has a very strong line at 630 keV and 550 keV but it is not seen. Tm-168 has a strong line at 731 but this is not observed.

Coincidence Run 5716 Analysis

[math]E_{\gamma}[/math] Energy of coincidence photon (decay time in seconds)
53.1622 79.6142 (2.16E-10), 80.9979 (6.49E-9), 160.6120 (2.16E-10), 223.2368 (4.39E-11), 302.8508 (4.39E-11), 383.8485 (4.39E-11)
79.6142 53.1622 (2.16E-10), 80.9979 (6.28E-9), 223.2368 (1.72E-10), 276.3989 (1.72E-10)
80.9979 53.1622 (6.49E-9), 79.6142 (6.28E-9), 223.2368 (6.45E-9), 276.3989 (6.45E-9), 302.8508 (6.28E-9), 356.0129 (6.28E-9)
160.6120 53.1622 (2.16E-10), 223.2368 (1.72E-10), 276.3989 (1.72E-10)
223.2368 53.1622 (4.39E-11), 79.6142 (1.72E-10), 80.9979 (6.45E-9), 160.6120 (1.72E-10)
276.3989 79.6142 (1.72E-10), 80.9979 (6.45E-9), 160.6120 (1.72E-10)
302.8508 53.1622 (4.39E-11), 80.9979 (6.28E-9)
356.0129 80.9979 (6.28E-9)
383.8485 53.1622 (4.39E-11)

Time Spectrum

Singles Run 5718

R5718Det180-2Time.png

R5718TimeDiff.pngR5718TimeDiffZoom.png

Coincidence Run 5716 (10 nsec timing window)

R5716TimeDiff.pngR5716TimeDiffZoom.png

Photons in Coincidence

The 81 keV and 356 keV lines are the strongest and, when they occur in coincidence, they represent the transition from the 436 keV excited state of Cs-133 to the 81 keV excited state and then the ground state.

If I put a cut on the strongest line (356 keV) observed by Det B and ask what photon energies are observed in coincidence (timing window of 53 ns) with the other HpGe detector (Detector 180-2) I see the spectrum

7 hour Coinc run 5716 (timing window of 10 ns)

R5716 356Coin.png R5716 DetB356Coin.png R5716 356CoinOverlay.png

2 minute Singles Run 5718 (timing window of 53 ns)

R5718 356Coin.png


Perform a similar analysis but require a 276 keV photon in Det. B. You should see a 160 keV photon in coincidence come out of the compton scattered photon "background".

R5716 276CoinOverlay.png

Can almost see the 160 keV line (need more statistics)





  1. 276 && 306 keV lines http://www.nndc.bnl.gov/nsr/nsrlink.jsp?1995JU02
  2. Ba-132 83 && 360 http://www.nndc.bnl.gov/nsr/nsrlink.jsp?1996KU01 http://www.nndc.bnl.gov/nsr/nsrlink.jsp?2002GA01
  3. Ba-132 383 && 515 http://www.nndc.bnl.gov/nsr/nsrlink.jsp?1975GI11


PAA_CoincidenceCounting#Coincidence_lines_for_Eu-152

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