Difference between revisions of "Cf252 NaI detector test. 12 Apr 2012"

Revision as of 19:04, 12 April 2012

NaI detector, -1030V, 300 mV threshold on gate channel, signal ADC4

Run #	source	shielding	cnts	rate	Comments
2775	Co-60 some distance away from NaI	2" Pb around, no front shielding
2776	bkgd	2" Pb around, no front shielding
2777	Co-60 on NaI taped	2" Pb around, no front shielding			clear 2 big 1.2 and 1.4 MeV peaks, small peak around 4.3 MeV Calibration 1.4 MeV/575 cnls = 0.00243 MeV/cnl
2778	bkgd	2" Pb around, no front shielding		41.75 Hz
2779	bkgd	all around 2" Pb around		15.74 Hz	good area around 2000-3800 channels
2780	Cf252	all around 2" Pb around		12 kHz	Cf252 just in front of NaI
2781	Cf252	all around 2" Pb around		5.4 kHz	Cf252 about 15 cm away from NaI
2782	Cf252	all around 2" Pb around		1.1 kHz	Cf252 17" away from NaI
2784	Cf252	all around 2" Pb around	1,372,745	1,140 Hz	20 min run
2785	Cf252	all around 2" Pb around	153,508	129.5 Hz	20 min run. 2" Pb just after Cf252
2787	Cf252	all around 2" Pb around	1,231,537	1,024 Hz	20 min run. 2" Borated Poly just after Cf252
2788	Cf252	all around 2" Pb around	1,225,232	1,020 Hz	20 min run. 2" NoBorated Poly just after Cf252
2789	Cf252	all around 2" Pb around			20 min run. 2" Pb, 2" Borated Poly just after Cf252

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	[[File:Cf 2inchBoratedPoly infront.eps]]		[[File:Cf 2inchBoratedPoly infront.eps]]