LB Feb Nickel Consistency Check

This analysis was done on Inv # 170010 which was irradiated in February 2017 with a rotating sample holder. This was a 50% mix of Se and Soil. The mass of the front nickel foil was 0.27 grams and the mass of the rear nickel foil was 0.25 grams. The histograms made were weighted by the time of the run and the mass of the nickel foil.

Front-back foil compaison

Below is a table for the front nickel foil:

	2/14/17 (r5923)	2/15/17 (r5931)	2/17/17 (r5989)	2/18/17 (r6008)	2/19/17 (r6026)	2/21/17 (r6062)	2/22/17 (r6080)	2/23/17 (r6113)	2/24/17 (r6138)	2/25/17 (r6146)	2/26/17 (r6156)
Original Window
Expanded Window
Original Background	0.0.6227 +/- 0.1145	0.659037 +/- 0.114807	0.510516 +/- 0.101046	0.532599 +/- 0.104256	0.6782 +/- 0.1165	0.7647 +/- 0.1237	0.7907 +/- 0.1258	0.453491 +/- 0.0952356	0.295556 +/- 0.0768838	0.17772 +/- 0.0596188	0.132862 +/- 0.0515485
Expanded Background	0.2953 +/- 0.0645	0.370149 +/- 0.0727176	0.313773 +/- 0.0669513	0.2913 +/- 0.0645	0.353323 +/- 0.0710456	0.542389 +/- 0.0880251	0.470052 +/- 0.0819453	0.306094 +/- 0.0661269	0.20074 +/- 0.0535511	0.132969 +/- 0.044	0.101777+/-0.0381308
Signal Background (Take Larger Error)	0.6227 +/- 0.1145	0.659037 +/- 0.114807	0.510516 +/- 0.101046	0.532599 +/- 0.104256	0.6782 +/- 0.1165	0.7647 +/- 0.1237	0.7907 +/- 0.1258	0.453491 +/- 0.0952356	0.295556 +/- 0.0768838	0.17772 +/- 0.0596188	0.132862 +/- 0.0515485
Integrated Background	31.135 +/- 5.73	32.95 +/- 5.74	25.53 +/- 5.05	26.63 +/- 5.21	33.91 +/- 5.82	38.24 +/- 6.19	39.53 +/- 6.29	22.67 +/- 4.76	14.78 +/- 3.84	8.89 +/- 2.98	6.64 +/- 2.58
Signal in Window (Hz)	203.9 +/- 12.14	226.7 +/- 6.039	249.2 +/- 5.683	160.3 +/- 6.606	176.9 +/- 6.908	279.7 +/- 4.56	191.2 +/- 5.269	126.3 +/- 4.943	84.67 +/- 4.5201	53.02 +/- 4.0059	30.51 +/- 2.33
Background Subtracted Signal	172.77 +/- 13.42	193.75 +/- 8.33	223.67 +/- 7.60	133.67 +/- 8.80	142.99 +/- 9.03	241.46 +/- 7.69	151.67 +/- 8.21	103.63 +/- 6.86	69.89 +/- 5.93	44.13 +/- 4.99	23.87 +/- 3.48

Below is a table for the rear nickel foil:

	2/14/17 (r5924)	2/15/17 (r5932)	2/17/17 (r5990)	2/18/17 (r6009)	2/19/17 (r6027)	2/21/17 (r6063)	2/22/17 (r6081)	2/23/17 (r6114)	2/24/17 (r6139)	2/25/17 (r6147)	2/26/17 (r6157)
Original Window
Expanded Window
Original Background	0.712245 +/- 0.119352	0.560274 +/- 0.105856	0.747163 +/- 0.122243	0.948503 +/- 0.137732	0.5559 +/- 0.1054	1.053 +/- 0.145	0.7672 +/- 0.1239	0.69739 +/- 0.118101	0.40956 +/- 0.0896135	0.3712 +/- 0.0862	0.17722 +/- 0.0586795
Expanded Background	0.366691 +/- 0.0723771	0.364745 +/- 0.0721848	0.481813 +/- 0.0829641	0.486985 +/- 0.0834082	0.390681 +/- 0.0747071	0.719033 +/- 0.10135	0.4564 +/- 0.0807	0.427189 +/- 0.0781198	0.293302 +/- 0.0647304	0.2707 +/- 0.0622	0.128385 +/- 0.0428261
Signal Background (Take Larger Error)	0.712245 +/- 0.119352	0.560274 +/- 0.105856	0.747163 +/- 0.122243	0.948503 +/- 0.137732	0.5559 +/- 0.1054	1.053 +/- 0.145	0.7672 +/- 0.1239	0.69739 +/- 0.118101	0.40956 +/- 0.0896135	0.3712 +/- 0.0862	0.17722 +/- 0.0586795
Integrated Background	35.61 +/- 5.97	28.01 +/- 5.29	37.36 +/- 6.11	47.43 +/- 6.89	27.80 +/- 5.27	52.65 +/- 7.25	38.36 +/- 6.20	34.87 +/- 5.90	20.48 +/- 4.48	18.56 +/- 4.31	8.86 +/- 2.93
Signal in Window (Hz)	231.6 +/- 7.356	318.7 +/- 7.242	403.1 +/- 10.34	271.6 +/- 6.24	302.2 +/- 5.59	394.9 +/- 3.39	191.9 +/- 5.64	181.9 +/- 5.666	121.4 +/- 5.058	108.5 +/- 12.31	43.69 +/- 7.20
Background Subtracted Signal	195.99 +/- 9.47	290.69 +/- 8.97	365.74 +/- 12.01	224.17 +/- 9.30	274.4 +/- 7.68	342.25 +/- 8.00	153.54 +/- 8.38	147.03 +/- 8.18	100.92 +/- 6.76	89.94 +/- 13.04	34.83 +/- 7.77

Since the efficiency is unknown I will plot the ratio of the activities so the efficiency cancels out. Below is a table of rations that will be entered into a .dat File after correcting for time to make sure that they are the activities at the same time. The decay constant for Ni-57 is

[math] \lambda = 5.41 \times 10^{-5} \frac{1}{sec} [/math]

	r5924	r5932	r5990	r6009	r6027	r6063	r6081	r6114	r6139	r6147	r6157
Time elapsed (Sec)	751	761	681	835	630	657	731	981	976	1337	1297
Original Activity	195.99 +/- 9.47	290.69 +/- 8.97	365.74 +/- 12.01	224.17 +/- 9.30	274.4 +/- 7.68	342.25 +/- 8.00	153.54 +/- 8.38	147.03 +/- 8.18	100.92 +/- 6.76	89.94 +/- 13.04	34.83 +/- 7.77
Corrected Activity (Hz)	204.12 +/- 9.86	302.91 +/- 9.35	379.46 +/- 12.46	234.53 +/- 9.73	283.91 +/- 7.94	354.63 +/- 8.29	159.73 +/- 8.72	155.04 +/- 8.62	106.39 +/- 7.13	96.69 +/- 14.02	37.36 +/- 8.33
Ratio With Front Foil	0.85 +/- 0.07	0.64 +/- 0.03	0.59 +/- 0.03	0.57 +/- 0.04	0.50 +/- 0.03	0.68 +/- 0.03	0.95 +/- 0.07	0.67 +/- 0.06	0.66 +/- 0.07	0.46 +/- 0.08	0.64 +/- 0.17

Thin Window Method

It would seem according to Se170063 Thin Window Analysis, the thin window method can give answers that we would expect, so I will try that here to see if I can get the ratio of the front and rear nickel foils to be 1.

Below is a table for the front foil information:

	2/14/17 (r5924)	2/15/17 (r5932)	2/17/17 (r5990)	2/18/17 (r6009)	2/19/17 (r6027)	2/21/17 (r6063)	2/22/17 (r6081)	2/23/17 (r6114)	2/24/17 (r6139)	2/25/17 (r6147)	2/26/17 (r6157)
Thin Window
Original Window
Expanded Window
Maximum of Histogram
Original Background
Expanded Background
Signal Background (Take Larger Error)
Integrated Background
Signal in Thin Window (Hz)
Background Subtracted Signal

Below is the table for the rear nickel foil

	2/14/17 (r5924)	2/15/17 (r5932)	2/17/17 (r5990)	2/18/17 (r6009)	2/19/17 (r6027)	2/21/17 (r6063)	2/22/17 (r6081)	2/23/17 (r6114)	2/24/17 (r6139)	2/25/17 (r6147)	2/26/17 (r6157)
Original Window
Expanded Window
Maximum of Histogram
Original Background
Expanded Background
Signal Background (Take Larger Error)
Integrated Background
Signal in Thin Window (Hz)
Background Subtracted Signal