QCYK Reference material - 0 to 200 keV -Practical Gamma-Ray Spectrometry

QCYK Reference material - 0 to 200 keV

This spectrum was measured using a 45% n-type detector, mounted in a standard 10cm thick cylindrical graded shield. The source was the QCYK reference material evaporated onto a 5 cm diameter filter paper placed, within a polystyrene counting container, at the centre of the detector face. Such a counting position invites true coincidence summing! Peak attributions below 50 keV are tentative at best. There are many overlapping X-rays, which GammaVision has not necessarily deconvoluted correctly.

Examples Page | 200 - 700 keV | 700 - 1200 keV | 1200 - 2000 keV

	Measured Energy (keV)	True energy (keV)	Relative Count rate	Nuclide	DK Mode	Attribution	Emmission Probability (%)
1	11.79	11.8455	24.869	²⁰³Hg	`b`-	Tl L	5.43
		11.89		²⁴¹Am	`a`	Np Ll	0.848
2	13.78	13.9	52.365	²⁴¹Am	`a`	Np L`a`	13.03
		14.098		⁸⁸Y	EC	Sr K`a`2	17.3
3	15.74	15.8359	8.942	⁸⁸Y	EC	Sr K`b`1	8.21
4	17.54	17.81	9.393	²⁴¹Am	`a`	Np L`bh`	18.86
5	21.96	21.9906	367.016	¹⁰⁹Cd	EC	Ag K`a`2	28.99
		22.1632		¹⁰⁹Cd	EC	Ag K`a`1	54.7
6	24.07	24.002	1	¹¹³Sn	EC	In K`a`2	27.85
		24.2097		¹¹³Sn	EC	In K`a`1	52.2
7	24.93	25.029	71.55	¹⁰⁹Cd	EC	Ag K`b`1	15.14
		25.4845		¹⁰⁹Cd	EC	Ag K`b`2	2.63
8	27.27	27.3685	10.316	¹¹³Sn	EC	In K`b`1	14.6
9	31.95	31.8174	4.798	¹³⁷Cs	`b`-	Ba K`a`2	1.95
		32.1939		¹³⁷Cs	`b`-	Ba K`a`1	3.59
10	33.3	33.0344	9.857	¹³⁹Ce	EC	La K`a`2	22.5
		33.1963		²⁴¹Am	`a`	FEP	0.121
		33.4421		¹³⁹Ce	EC	La K`a`1	41.2
11	36.27	36.49	0.907	¹³⁷Cs	`b`-	Ba K`b`1	1.055
12	37.67	37.345	2.189	¹³⁷Cs	`b`-	Ba K`b`2	0.266
		37.908		¹³⁹Ce	EC	La K`b`1	12.3
13	43.6		0.246			Random summing`a`
14	46.35	46.54	0.073	²¹⁰Pb	`b`-	FEP - Background
15	48.57		0.406			??
16	49.67	49.6519	0.621	²⁴¹Am	`a`	Ge esc
17	59.52	59.5409	35.111	²⁴¹Am	`a`	FEP	35.78
18	66.62		0.408			??
19	70.82	70.8325	1.25	²⁰³Hg	`b`-	Tl K`a`2	3.75
20	72.91	72.8725	2.133	²⁰³Hg	`b`-	Tl K`a`1	6.33
21	74.99	74.82	0.108	²¹²Pb	`b`-	Bi K`a`2 - Background
22	77.41	77.11	0.099	²¹²Pb	`b`-	Bi K`a`1 - Background
23	82.48	82.6165	0.636	²⁰³Hg	`b`-	Tl K`b`1	2.15
24	84.99	85.184	0.27	²⁰³Hg	`b`-	Tl K`b`2	0.64
25	88.06	88.0336	18.255	¹⁰⁹Cd	EC	FEP	3.626
26	92.75	92.58	0.05	²³⁴Th	`b`-	FEP - Background
27	122.09	122.06065	14.38	⁵⁷Co	EC	FEP	85.51
28	136.49	136.47356	1.86	⁵⁷Co	EC	FEP	10.71
29	143.86	143.76	0.038	²³⁵U	`a`	FEP - Background
30	165.87	165.8575	11.745	¹³⁹Ce	EC	FEP	79.9
31	188.98	189.4146	0.052	¹³⁹Ce	EC	K`a`1 sum then Ge esc
32	199.13	199.2996	1.048	¹³⁹Ce	EC	K`a`1 sum

This website was created by Dr Gordon Gilmore for the benefit of readers of Practical Gamma-Ray Spectrometry (3rd Edition).

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