Difference between revisions of "R5718-5716 Ba133Analysis"
| Line 29: | Line 29: | ||
|- | |- | ||
|} | |} | ||
| − | |||
| − | |||
| − | |||
| − | |||
| − | |||
| − | |||
=Run list= | =Run list= | ||
Revision as of 19:06, 20 August 2013
Ba-133 source lines
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 |
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 |
| 510 | Weak |
| 584 | |
| 609 | |
| 913 | |
| 970 | |
| 913 | |
| 970 | |
| 911 | |
| 970 | |
| 1121 | |
| 1277 | |
| 1417 |
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
The 83, 276, 302, and 356 lines are 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)