CH Isotope Table

Thermal Neutron Capture Gammas

https://www.nndc.bnl.gov/capgam/indexbyn.html

Sodium & Iodine (NaI Detector)

Isotope Name	Natural Abundance (%)	Thermal Neutron Cross Section (Barnes)	Half Life	Capture Gamma Lines (int > %)
				Energy (KeV)	Intensity
23Na		0.517 b ± 0.004 b	Stable	90.99	49.27
				472.20	100.00
				869.23	22.59
				874.40	15.89
				1636.27	5.24
				2025.09	6.85
				2208.40	5.72
				2414.45	5.32
				2517.71	15.20
				2752.22	13.67
				3587.40	12.48
127I (secondary)			Stable	27.36	23.03
				52.378	11.727
				58.107	19.829
				67.118	7.207
				124.2804	12.623
				133.6106	100
				142.1371	9.638
				147.104	6.802
				153.011	12.516
				156.506	6.269
				160.756	10.554
				193.5634	6.78
				248.742	7.441
				301.897	11.834
				344.757	5.352
				420.843	7.143
129I			1.57 x 107 years	69.59	18.57
				85.1104	8.286
				159.9921	6.286
				184.9756	9.143
				309.794	7.186

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Shielding

Isotope Name	Natural Abundance (%)	Half Life	Capture Gamma Lines (int > %)
			Energy (KeV)	Intensity
27Al		Stable	30.64	100.00
			983.018	15.771
			1013.676	9.677
			1408.3	11.111
			1526.17	6.452
			1589.72	5.735
			1622.87	16.487
			2108.24	10.0358
			2138.828	7.885
			2271.65	7.527
			2282.773	16.846
			2577.725	7.885
			2590.244	14.516
			2821.461	13.978
			3033.893	31.183
			3465.067	25.305
			3591.211	16.846
10B		Stable	2296.63	13.57
			2533.4	21.494
			4444.03	100
			4711.18	39.0244
			6739.53	28.963
			7006.75	84.299
12C		Stable	1261.76	47.96
			3683.921	47.636
			4945.301	100
13C		Stable	495.40	9.52
			1273.81	5.833
			1586.92	10.119
1H		Stable	2223.25	100.00

Converter

Isotope Name	Natural Abundance (%)	Half Life	Capture Gamma Lines (int > %)
			Energy (KeV)	Intensity
152Gd (0.2%)		1.08×1014 y	41.56	87.27
			51.7842	15.818
			87.608	29.636
			88.2962	19.273
			109.7601	100
			141.914	42
			166.908	15.145
			174.436	19.636
			183.467	32
			186.857	16
			195.182	16.727
			206.2667	18.909
			212.004	38.545
			249.546	43.818
			315.077	16.727
			315.199	50.727
			316.026	42.364
			320.089	27.455
			327.844	28
			361.629	20.727
			371.33	17.455
			436.266	35.273
			467.1	23.818
			500.483	15.545
			530.453	16.727
153Gd		240.4 d	123.07	100.00
			247.92	46.145
			692.41	19.818
			873.18	15.236
154Gd (2.18)		Stable	86.55	100.00
			105.309	52.593
			163.311	15.185
			5820.3	17.037
155Gd (14.8)		Stable	88.97	66.14
			199.218994	100
			1065.1781	17.848
			1154.14673	15.823
			1159.031	21.519
			1230.6857	17.595
156Gd (20.47)		Stable	410.75	16.83
			4745.8	16.237
			5550.77	19.57
			5566.29	29.785
			6359.82	100
157Gd (15.65)		Stable	79.51	53.18
			181.943	100
			897.506	17.846
			897.62	16
			944.181	46.667
			962.122	29.744
			977.144	21.0769
			1107.67	24.615
			1119.2	17.0256
			1186.002	23.333
			1187.136	20.564
			6750	15.08
158Gd (24.84)		Stable	95.69	50.00
			146.324	27.692
			466.618	27.5
			507.639	71.154
			507.727	100
			524.77	18.269
			537.86	26.538
			551.385	40
			558.195	51.923
			596.066	15.192
			601.969	82.692
			646.75	25.577
			676.512	32.885
			700.16	19.231
			713.649	18.654
			781.56	18.654
			790.9	29.231
			933.08	23.0769
			963.85	23.0769
			1000.51	15.769
			1028.62	21.731
			1061.63	31.538
			1078.57	19.231
			1095.18	16.154
			1128.47	22.308
			1139.9	37.115
			4802	23.08
			5385	16.54
			5434	30.77
			5942	86.54
160Gd (21.86)		>3.1×1019 y	394.70	91.49
			469	91.49
			804.3	16.81
			1273	21.28
			1490	29.79
			3712	15.11
			3787	23.4
			4227	19.36
			4255	21.28
			4298	34.04
			4324	20.85
			5280	100
			5321	18.51

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Fast Neutron Interactions

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PAS Experiment