Difference between revisions of "R5718-5716 Ba133Analysis"

From New IAC Wiki
Jump to navigation Jump to search
Line 71: Line 71:
 
|-
 
|-
 
| 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

Revision as of 20:26, 20 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 Analsysis

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 53,79,160, 223, lines

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

The 81 keV and 356 keV lines are the strongest and, when they occur in coincidence, 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) and ask what photon energies are observed in coincidence with the other HpGe detector I see the spectrum

R5715 356Coin.png


The 83, 276, 302, and 356 lines are observed when a 200 nsec coincidence window is required.

276.3997(13) 7.164(22)

302.8510( 6)     18.33( 6)
356.0134( 6)     62.05(19)



  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