Cf252 runs with HPGe - Revision history

Burgjeff: /* search for fission fragment gammas */

2017-01-19T06:45:29Z

search for fission fragment gammas

2017-01-19T06:45:03Z

search for fission fragment gammas

2017-01-19T06:42:32Z

search for fission fragment gammas

2017-01-19T06:36:11Z

search for fission fragment gammas

2017-01-19T06:29:49Z

RunPlan

2017-01-19T06:26:31Z

01/12/17 - 01/18/17

2017-01-19T06:23:35Z

01/12/17 - 01/18/17

2017-01-19T03:03:00Z

01/12/17 - 01/18/17

2017-01-19T03:00:01Z

01/12/17 - 01/18/17

2017-01-19T02:58:45Z

01/12/17 - 01/18/17

@@ Line 73: / Line 73: @@
 == search for fission fragment gammas ==
-I completed a run with the CF252 source where all events were 3-fold coinc between the HPGe detector, a small timing scintillator nearby the source, and a hit in at least one neutron detector (run 5743). Neutrons were then discriminated in software by ToF, made possible by means of the timing scintillator.
+I completed a run with the CF252 source where all events were 3-fold coinc between the HPGe detector, a small timing scintillator nearby the source, and a hit in at least one neutron detector (run 5743). Neutrons were then discriminated in software by ToF, which is made possible by means of the timing scintillator.
 I compared the photon energies of events with a neutron hit, to energies from a non-coincidence background subtracted CF252 spectrum (runs 5775 & 5773). I made a histogram for both cases and normalized the integrals to unity in oder to allow me to search for gammas that occur overwhelmingly when a neutron is coincident.  I failed to see any pronounced energies occurring only when in coincidence with a neutron.

@@ Line 73: / Line 73: @@
 == search for fission fragment gammas ==
-I completed a run with the CF252 source where all events were 3-fold coinc. between the HPGe detector, a small timing scintillator nearby the source, and a hit in any neutron detector (run 5743). Neutrons are then discriminated in software by ToF, which is possible by means of the timing scintillator.
+I completed a run with the CF252 source where all events were 3-fold coinc between the HPGe detector, a small timing scintillator nearby the source, and a hit in at least one neutron detector (run 5743). Neutrons were then discriminated in software by ToF, made possible by means of the timing scintillator.
-I compared the photon energies of events with a neutron hit, to the energies from non-coincidence background subtracted CF252. I made a histogram for both cases and normalized the integrals to unity in oder to allow easy searching of gammas that occur overwhelmingly when a neutron is coincident.  I failed to see any pronounced energies which occurred only when coincident with a neutron.
+I compared the photon energies of events with a neutron hit, to energies from a non-coincidence background subtracted CF252 spectrum (runs 5775 & 5773). I made a histogram for both cases and normalized the integrals to unity in oder to allow me to search for gammas that occur overwhelmingly when a neutron is coincident.  I failed to see any pronounced energies occurring only when in coincidence with a neutron.

← Older revision		Revision as of 06:42, 19 January 2017
Line 73:		Line 73:

	== search for fission fragment gammas ==		== search for fission fragment gammas ==
−	I completed a run with the CF252 source where all events ~~are triple coincidences~~ between the HPGe detector, a small timing scintillator nearby the source, and a ~~neutron~~ hit in any ~~one of our neutrons detectors~~ (run 5743). I compared photon ~~energy~~ from ~~this run to a~~ coincidence background subtracted ~~run with the~~ CF252. I normalized the integrals ~~of both histograms~~ to unity in oder to allow easy searching of gammas that occur overwhelmingly when a neutron is coincident. I failed to see any pronounced ~~gamma energy lines that~~ only ~~occurred~~ coincident with a neutron ~~event~~.	+	I completed a run with the CF252 source where all events were 3-fold coinc. between the HPGe detector, a small timing scintillator nearby the source, and a hit in any neutron detector (run 5743). Neutrons are then discriminated in software by ToF, which is possible by means of the timing scintillator.
		+
		+	I compared the photon energies of events with a neutron hit, to the energies from non-coincidence background subtracted CF252. I made a histogram for both cases and normalized the integrals to unity in oder to allow easy searching of gammas that occur overwhelmingly when a neutron is coincident. I failed to see any pronounced energies which occurred only when coincident with a neutron.

@@ Line 73: / Line 73: @@
 == search for fission fragment gammas ==
-[[File:CoincVSNONCoinceCF252.png| 750px]]
+I completed a run with the CF252 source where all events are triple coincidences between the HPGe detector, a small timing scintillator nearby the source, and a neutron hit in any one of our neutrons detectors (run 5743).  I compared photon energy from this run to a coincidence background subtracted run with the CF252. I normalized the integrals of both histograms to unity in oder to allow easy searching of gammas that occur overwhelmingly when a neutron is coincident.  I failed to see any pronounced gamma energy lines that only occurred coincident with a neutron event.
 ==Estimate run time for efficiency measurement==

← Older revision		Revision as of 06:29, 19 January 2017
Line 71:		Line 71:

	[[File:HPGe timing.png\|700px]]		[[File:HPGe timing.png\|700px]]
		+
		+	== search for fission fragment gammas ==
		+	[[File:CoincVSNONCoinceCF252.png\| 750px]]

	==Estimate run time for efficiency measurement==		==Estimate run time for efficiency measurement==

@@ Line 128: / Line 128: @@
 | 5766 || 1546 || 6000 || 224000|| CF252 src. 4" Poly. '''2-fold''' coincidence between timing scint and  HPGe  || -
 |-
-| 5773 || 780  ||rowspan="4" | 0|| rowspan="4" | 224000 || CF252 src.  4" Poly. '''no coincidence'''|| -
+| 5773 || 780  || 3000 || 227000 || CF252 src.  4" Poly. '''no coincidence'''|| -
 |-
-| 5775 || 780 || N/A  || '''No src'''. 4" Poly. no coincidence|| Background run
+| 5775 || 780 || N/A  ||rowspan="3" | 0|| rowspan="3"| 227000 || '''No src'''. 4" Poly. no coincidence|| Background run
 |-
 | 5769 ||21097  || rowspan="2" | 10  ||'''Na-22'''. 4" Poly. '''2-fold''' coincidence between timing scint and  HPGe|| Na-22 calibration run

@@ Line 128: / Line 128: @@
 | 5766 || 1546 || 6000 || 224000|| CF252 src. 4" Poly. '''2-fold''' coincidence between timing scint and  HPGe  || -
 |-
-| 5767 || 17 ||-|| - || CF252 src.  4" Poly. '''no coincidence'''|| - ||
+| 5767 || 17 ||rowspan="4" | 0|| rowspan="4" | 224000 || CF252 src.  4" Poly. '''no coincidence'''|| -
 |-
-| 5768 || 116 || N/A ||-|| - || '''No src'''. 4" Poly. no coincidence|| '''Background run'''
+| 5768 || 116 || N/A  || '''No src'''. 4" Poly. no coincidence|| Background run
 |-
-| 5769 ||21097  || rowspan="2" | 10 ||-|| - ||'''Na-22'''. 4" Poly. '''2-fold''' coincidence between timing scint and  HPGe|| Na-22 calibration run
+| 5769 ||21097  || rowspan="2" | 10  ||'''Na-22'''. 4" Poly. '''2-fold''' coincidence between timing scint and  HPGe|| Na-22 calibration run
 |-
-| 5770 || 1211 ||-|| - ||'''C0-60'''. 4" Poly.  2-fold coincidence between timing scint and  HPGe|| Co-22 calibration run
+| 5770 || 1211 ||'''C0-60'''. 4" Poly.  2-fold coincidence between timing scint and  HPGe|| Co-22 calibration run