Latest revision as of 21:05, 28 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 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

Coincidence Run 5716 (10 nsec timing window)

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)

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

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".

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

PAA_CoincidenceCounting#Coincidence_lines_for_Eu-152

@@ Line 29: / Line 29: @@
 |-
 |}
-=Coincidence lines for Ba-133=
-#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
 =Run list=
@@ Line 49: / Line 43: @@
 [[File:r5716-5718_Ba-133Coinc.png | 200 px]]
-==Singles Run 5718 Analsysis==
+==Singles Run 5718 Analysis==
 Photons from the source
@@ Line 62: / Line 56: @@
-Did not observe the 53,79,160, 223, lines
+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===
 {| border="1"  |cellpadding="20" cellspacing="0
@@ Line 77: / Line 73: @@
 |-
 | 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
@@ Line 84: / Line 82: @@
 | 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
+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]]
+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)
-The 83, 276, 302, and 356 lines are are observed when a 200 nsec coincidence window is required.
-.3997(13)     7.164(22)
-.8510( 6)     18.33( 6)
-.0134( 6)     62.05(19)
-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
+#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
-[[File:r5715_356Coin.png | 200 px]]
 [[PAA_CoincidenceCounting#Coincidence_lines_for_Eu-152]]

Difference between revisions of "R5718-5716 Ba133Analysis"