Nuclear data explorer · compound nucleus

⁵⁷Fe

⁵⁷Fe is formed when ⁵⁶Fe + n fuse. Its levels just above each threshold are the resonances that set those reactions' rates.

⁵⁶Fe(n,γ)⁵⁷Fe

Channels and what has been measured

Every EXFOR reaction that forms ⁵⁷Fe: entrance pair (rows) and the quantities measured (columns), with the energies covered.

Every EXFOR reaction that forms ⁵⁷Fe: entrance pair (rows) and the quantities measured (columns), with the energies covered.
Reaction	Datasets	σ	σ→Eₓ	dσ/dΩ	Ay	Y	ωγ	MACS	other
⁵⁶Fe(n,γ)⁵⁷Fe	83	107.2 meV – 14 MeV	125 meV	28.8 MeV – 20 MeV	— (0)	— (0)	4543 eV – 850 keV	95 keV – 75 keV	1625 meV – 540 keV
⁵⁶Fe(n,inl)	304	9520 keV – 17 MeV	135800 keV – 63 MeV	145790 keV – 200 MeV	19.8 MeV	— (0)	— (0)	3	11850 keV – 17 MeV
⁵⁶Fe(n,p)⁵⁶Mn	155	883.4 MeV – 48 MeV	— (0)	713 MeV – 14 MeV	— (0)	— (0)	— (0)	441.3 MeV – 1.5 MeV	16490 keV – 15 MeV
⁵⁶Fe(n,el)	96	1225 meV – 14 MeV	— (0)	2034 keV – 94 MeV	19.8 MeV	— (0)	561.1 keV – 850 keV	— (0)	725 meV – 45 keV
⁵⁶Fe(n,α)⁵³Cr	11	55.4 MeV – 14 MeV	214 MeV	114 MeV	— (0)	— (0)	— (0)	3	— (0)
⁵⁵Mn(d,p)⁵⁶Mn	6	52.2 MeV – 36 MeV	— (0)	— (0)	— (0)	13.9 MeV – 12 MeV	— (0)	— (0)	— (0)
⁵⁶Fe(n,d)⁵⁵Mn	5	115 MeV	115 MeV	314 MeV – 15 MeV	— (0)	— (0)	— (0)	— (0)	— (0)
⁵³Cr(α,p)⁵⁶Mn	4	26.8 MeV – 33 MeV	— (0)	— (0)	— (0)	15.8 MeV – 33 MeV	— (0)	— (0)	1
⁵³Cr(α,el)	3	— (0)	— (0)	32 MeV – 23 MeV	— (0)	— (0)	— (0)	— (0)	— (0)
⁵⁴Cr(³He,n)⁵⁶Fe	2	— (0)	— (0)	214 MeV	— (0)	— (0)	— (0)	— (0)	— (0)
⁵³Cr(α,inl)	1	— (0)	— (0)	123 MeV	— (0)	— (0)	— (0)	— (0)	— (0)
⁵⁴Cr(³He,α)⁵³Cr	1	— (0)	— (0)	117 MeV	— (0)	— (0)	— (0)	— (0)	— (0)
⁵⁴Cr(³He,t)⁵⁴Mn	1	— (0)	— (0)	123 MeV	— (0)	— (0)	— (0)	— (0)	— (0)
⁵⁶Fe(n,t)⁵⁴Mn	1	114 MeV	— (0)	— (0)	— (0)	— (0)	— (0)	— (0)	— (0)

18 more reactions: heavier projectiles, several outgoing particles or inclusive data

18 more reactions: heavier projectiles, several outgoing particles or inclusive data
Reaction	Datasets	σ	σ→Eₓ	dσ/dΩ	Ay	Y	ωγ	MACS	other
⁵⁶Fe(n,x)	65	174.2 MeV – 94 MeV	414 MeV – 15 MeV	1413 MeV – 94 MeV	— (0)	— (0)	— (0)	7	237.9 MeV – 96 MeV
⁵⁶Fe(n,0)	63	— (0)	— (0)	— (0)	— (0)	— (0)	611.1 keV – 430 keV	— (0)	227 keV – 390 keV
⁵⁶Fe(n,2n)	35	912 MeV – 21 MeV	1112 MeV – 63 MeV	1214 MeV – 21 MeV	— (0)	— (0)	— (0)	3	— (0)
⁵⁶Fe(n,tot)	29	157.4 meV – 52 MeV	— (0)	— (0)	— (0)	— (0)	111.1 keV – 220 keV	3	— (0)
⁵⁵Mn(d,x)	12	96.9 MeV – 48 MeV	— (0)	— (0)	— (0)	29.6 MeV – 21 MeV	— (0)	— (0)	16.8 MeV
⁵³Cr(α,x)	11	332 MeV – 43 MeV	— (0)	— (0)	— (0)	— (0)	— (0)	— (0)	825 MeV – 42 MeV
⁵¹V(⁶Li,x)	4	112 MeV – 23 MeV	— (0)	114 MeV – 26 MeV	— (0)	— (0)	— (0)	— (0)	220 MeV – 26 MeV
⁵⁶Fe(n,n+p)	4	213 MeV – 14 MeV	— (0)	114 MeV	— (0)	— (0)	— (0)	— (0)	114 MeV
⁵⁶Fe(n,ths)	3	225 meV	— (0)	— (0)	— (0)	— (0)	— (0)	— (0)	125 meV
⁵⁵Mn(d,2n)	2	— (0)	— (0)	— (0)	— (0)	214 MeV – 21 MeV	— (0)	— (0)	— (0)
⁵⁶Fe(n,sct)	2	— (0)	— (0)	— (0)	— (0)	— (0)	— (0)	2	— (0)
⁵¹V(⁶Li,el)	1	— (0)	— (0)	112 MeV – 23 MeV	— (0)	— (0)	— (0)	— (0)	— (0)
⁵³Cr(α,non)	1	125 MeV	— (0)	— (0)	— (0)	— (0)	— (0)	— (0)	— (0)
⁵⁵Mn(d,2n+α)	1	— (0)	— (0)	— (0)	— (0)	121 MeV	— (0)	— (0)	— (0)
⁵⁶Fe(n,3n)	1	— (0)	— (0)	— (0)	— (0)	— (0)	— (0)	1	— (0)
⁵⁶Fe(n,γ+n)	1	114 MeV	— (0)	— (0)	— (0)	— (0)	— (0)	— (0)	— (0)
⁵⁶Fe(n,n+α)	1	— (0)	— (0)	— (0)	— (0)	— (0)	— (0)	1	— (0)
⁵⁶Fe(n,non)	1	11.9 MeV – 8 MeV	— (0)	— (0)	— (0)	— (0)	— (0)	— (0)	— (0)

Level scheme

Adopted levels of ⁵⁷Fe from ENSDF, with the particle thresholds and the Gamow window of the selected channel drawn across them.

Temperature

Near the thresholdAll 180 levels

level in the window with a measured ωγ
level in the window with no ωγ in EXFOR
Jπ in parentheses or in italics is tentative.

Resonances in the window

Levels between the ⁵⁶Fe(n,γ)⁵⁷Fe threshold (S = 7646.2 keV) and the top of the Gamow window at T₉ = 0.09 (50 keV above it), with the resonance strengths ωγ EXFOR holds for them.

Looking for measured strengths…

Resonances in the window
E (keV)	E_r (keV, c.m.)	Jπ	T½ or Γ	ωγ measured
7646.7 ± 0.7	0.5219	1/2-	–	…

A strength is matched to a level when its resonance energy plus the threshold lies within max(3 keV, 3σ) of the level energy.

Levels of ⁵⁷Fe (180)

Levels of ⁵⁷Fe
E (keV)	Jπ	T½ or Γ	γ branches
0	1/2-	–	–
14.4129	3/2-	T½ = 98.3 ns	→ 0 (100 %)
136.474	5/2-	T½ = 8.7 ns	→ 14.413 (89 %), → 0 (11 %)
366.759	3/2-	T½ = 10.5 ps	→ 136.47 (7.2 %), → 14.413 (79 %), → 0 (14 %)
706.416	5/2-	T½ = 4.1 ps	→ 366.76 (1.4 %), → 136.47 (9.3 %), → 14.413 (84 %), → 0 (4.8 %)
1007.13	7/2-	T½ = 130 fs	→ 366.76 (3 %), → 136.47 (64 %), → 14.413 (33 %)
1139.9	–	–	–
1197.81	9/2-	T½ = 2.9 ps	→ 136.47 (100 %)
1265.52	1/2-	T½ = 82 fs	→ 366.76 (93 %), → 14.413 (4.5 %), → 0 (2.5 %)
1356.83	7/2-	T½ = 180 fs	→ 706.42 (55 %), → 366.76 (23 %), → 14.413 (22 %)
1627.26	3/2-	T½ = 56 fs	→ 706.42 (8.6 %), → 366.76 (28 %), → 14.413 (61 %), → 0 (2.4 %)
1725.38	3/2-	T½ = 31 fs	→ 1265.5 (0.33 %), → 706.42 (19 %), → 366.76 (9.8 %), → 14.413 (2.7 %), → 0 (68 %)
1976.63	(1/2-,3/2,5/2-)	–	→ 1725.4 (17 %), → 136.47 (67 %), → 0 (16 %)
1989.66	9/2-	T½ = 180 fs	→ 1197.8 (27 %), → 1007.1 (32 %), → 706.42 (41 %)
1991	1/2-,3/2-	–	–
2113.11	(1/2,3/2,5/2-)	–	→ 1265.5 (21 %), → 0 (79 %)
2118.6	5/2-	T½ = 46 fs	→ 1007.1 (15 %), → 706.42 (51 %), → 14.413 (35 %)
2206.88	5/2-	T½ = 10 fs	→ 1265.5 (3.4 %), → 1007.1 (18 %), → 366.76, → 14.413 (43 %), → 0 (36 %)
2217.66	(5/2+)	–	→ 366.76 (21 %), → 136.47 (35 %), → 14.413 (45 %)
2220.2	(7/2-)	T½ = > 300 fs	→ 366.76 (4.9 %), → 136.47 (46 %), → 14.413 (49 %)
2330.41	(1/2,3/2,5/2+)	–	→ 1627.3 (100 %)
2355.96	(11/2)-	T½ = 60 fs	→ 1197.8 (29 %), → 1007.1 (71 %)
2358	1/2-,3/2-	–	–
2455.55	9/2+	T½ = > 1.4 ps	→ 1007.1 (100 %)
2456	1/2+,7/2+,9/2+	–	–
2505.29	5/2+	T½ = 78 fs	→ 1725.4 (2.8 %), → 706.42 (5.6 %), → 366.76 (56 %), → 136.47 (26 %), → 14.413 (10 %)
2564.22	3/2-	–	→ 1725.4 (64 %), → 0 (36 %)
2574.5	(1/2,3/2,5/2-)	T½ = 18 fs	→ 366.76 (28 %), → 0 (72 %)
2593.6	(3/2-,5/2-)	T½ = 37 fs	→ 1007.1 (41 %), → 706.42 (50 %), → 0 (9 %)
2599.4	(1/2,3/2,5/2+)	–	→ 136.47 (70 %), → 0 (30 %)
2697.17	1/2-	T½ = 6 fs	→ 706.42 (3.7 %), → 366.76 (8 %), → 14.413 (53 %), → 0 (35 %)
2758.3	–	–	→ 1265.5 (21 %), → 366.76 (79 %)
2821.07	(1/2,3/2,5/2+)	T½ = 60 fs	→ 2217.7 (69 %), → 1007.1 (31 %)
2835.89	3/2,5/2	–	→ 2113.1 (0.6 %), → 1007.1 (1.8 %), → 706.42 (40 %), → 366.76 (36 %), → 14.413 (6 %), → 0 (15 %)
2855	–	–	–
2878.7	(13/2)-	T½ = < 140 fs	→ 1197.8 (100 %)
2904.28	–	–	→ 706.42 (68 %), → 366.76 (32 %)
2921.2	1/2-,3/2-	T½ = 33 fs	→ 1265.5 (19 %), → 706.42, → 366.76 (14 %), → 14.413 (21 %), → 0 (46 %)
2970.89	(1/2,3/2,5/2+)	–	→ 366.76 (100 %)
2987.95	(1/2,3/2,5/2+)	–	→ 2330.4 (40 %), → 1265.5 (52 %), Eγ 2618.9 (7.9 %)
3059.1	1/2+	–	→ 366.76 (33 %), → 136.47 (67 %)
3098.95	–	–	→ 1007.1 (100 %)
3110	–	–	–
3122.76	–	–	→ 366.76 (100 %)
3134.8	(15/2)-	T½ = 160 ps	→ 2878.7 (100 %)
3182.77	1/2-,3/2-	–	→ 2970.9 (16 %), → 2206.9 (9.7 %), → 1725.4 (7.9 %), → 1356.8 (18 %), → 366.76 (18 %), → 14.413 (31 %)
3205.6	5/2-,7/2-	–	→ 2217.7 (100 %)
3239.89	1/2+	–	→ 2505.3 (2.1 %), → 2217.7 (2.7 %), → 1976.6 (5.3 %), → 366.76 (20 %), → 136.47 (36 %), → 14.413 (16 %), → 0 (19 %)
3269.26	(13/2)+	T½ = 370 fs	→ 2455.6 (33 %), → 2356 (67 %)
3284	–	–	–
3301.77	(5/2-,7/2-)	–	→ 1627.3 (30 %), → 1197.8 (52 %), → 366.76 (19 %)
3322.48	1/2-,3/2-	–	→ 2758.3 (33 %), → 2206.9 (14 %), → 1976.6 (9.2 %), → 1356.8 (44 %)
3336.59	–	–	→ 366.76 (100 %)
3340.33	–	–	→ 2455.6 (100 %)
3345	7/2+,9/2+	–	–
3371.11	3/2-	–	→ 2330.4 (6.9 %), → 1725.4 (16 %), → 14.413 (77 %)
3427.68	3/2-	T½ = 3 fs	→ 706.42 (40 %), → 366.76 (4.4 %), → 136.47 (8.9 %), → 14.413 (47 %)
3452	–	–	–
3473	5/2-,7/2-	–	–
3513.8	(17/2)	T½ = < 140 fs	→ 3134.8 (100 %)
3535	7/2+,9/2+	–	–
3535.92	–	–	→ 1725.4 (100 %)
3548	7/2+,9/2+	–	–
3561.34	–	–	→ 2758.3 (72 %), → 2113.1 (28 %)
3608	7/2+,9/2+	–	–
3608.51	–	–	→ 1627.3 (100 %)
3661	–	–	–
3752	7/2+,9/2+	–	–
3784	7/2+,9/2+	–	–
3791.59	3/2+	–	→ 2330.4 (5.8 %), → 2206.9 (5.1 %), → 1725.4 (36 %), → 1627.3 (15 %), → 1265.5 (21 %), → 14.413 (5.7 %), → 0 (12 %)
3827	5/2-,7/2-	–	–
3862.42	–	–	→ 2206.9 (100 %)
3881	–	–	–
3902	5/2-,7/2-	–	–
3926	(1/2,3/2,5/2-)	–	–
3936.1	5/2-,7/2-	–	→ 14.413 (100 %)
3981.18	3/2-	T½ = 7 fs	→ 2821.1 (5.6 %), → 2697.2 (29 %), → 2599.4 (37 %), → 366.76, → 0 (29 %)
4042.6	5/2-,7/2-	–	→ 1627.3 (100 %)
4081	–	–	–
4093	–	–	–
4136.62	(1/2,3/2,5/2+)	–	→ 3561.3 (24 %), → 3301.8 (27 %), → 3059.1 (5.1 %), → 2921.2 (13 %), → 2855 (12 %), → 2835.9 (12 %), → 2206.9 (7.8 %)
4138.57	5/2+	T½ = 15 fs	→ 2505.3 (45 %), → 1356.8 (37 %), Eγ 3774 (10 %), → 136.47 (7.7 %)
4144.3	(1/2,3/2,5/2+)	–	→ 1627.3 (100 %)
4209.59	(3/2)-	–	→ 3608.5 (10 %), → 3182.8 (3.7 %), → 3098.9 (3.7 %), → 2904.3 (5.2 %), → 2505.3 (8.2 %), → 2113.1 (3.7 %), → 1627.3 (6.7 %), → 1265.5 (6.1 %), → 366.76 (22 %), → 136.47 (16 %), → 14.413 (9.8 %), → 0 (5.2 %)
4239	3/2+,5/2+	–	–
4316	7/2+,9/2+	–	–
4363	5/2-,7/2-	–	–
4378.68	(1/2,3/2,5/2-)	–	→ 4042.6 (13 %), → 3371.1 (10 %), → 3122.8 (6.9 %), → 1725.4 (16 %), → 0 (53 %)
4379.44	(1/2,3/2,5/2-)	T½ = 3 fs	→ 2921.2 (16 %), → 2697.2 (9 %), → 366.76 (75 %)
4432.4	–	T½ = < 140 fs	→ 3134.8 (100 %)
4459.7	5/2-,7/2-	–	→ 3340.3 (2.2 %), → 3110 (5.4 %), → 2758.3 (12 %), → 2113.1 (6.4 %), → 1725.4 (16 %), → 1627.3 (58 %)
4492	5/2+	–	–
4525	7/2+,9/2+	–	–
4525.54	(17/2+)	T½ = 290 fs	→ 3269.3 (100 %)
4544	1/2+	–	–
4572.8	1/2+	–	→ 2599.4 (100 %)
4597.4	5/2+	T½ = 5 fs	→ 2564.2 (100 %), → 1725.4
4652	5/2-,7/2-	–	–
4680	–	–	–
4691.75	(5/2+)	–	→ 3336.6 (21 %), → 3322.5 (21 %), → 3205.6 (4.8 %), → 2855 (9.6 %), → 2835.9 (9.6 %), → 2505.3 (6.5 %), → 2206.9 (13 %), → 136.47 (14 %)
4719	–	–	–
4753	5/2-,7/2-	–	–
4771	3/2+,5/2+	–	–
4823.9	–	T½ = < 10 fs	→ 3239.9 (100 %)
4902	–	–	–
4922.9	5/2+	T½ = 7 fs	→ 2505.3 (59 %), → 1356.8 (41 %)
4970	(5/2-,7/2-)	–	–
4976	3/2+,5/2+	–	–
5019	5/2-,7/2-	–	–
5064	(1/2+)&(7/2-)	–	–
5085	–	–	–
5099	–	–	–
5115	1/2+	–	–
5140.25	(1/2,3/2,5/2+)	–	→ 3239.9 (22 %), → 2564.2 (39 %), → 2113.1 (39 %)
5178.44	1/2+	–	→ 3981.2 (60 %), → 2697.2 (10 %), → 136.47 (30 %)
5195	–	–	–
5221.6	(1/2-,3/2,5/2+)	–	→ 2835.9 (29 %), → 2206.9 (39 %), → 366.76 (32 %)
5238.7	(1/2,3/2,5/2+)	–	–
5250	1/2+	–	–
5271	1/2+	–	–
5289	5/2+	–	–
5334	7/2+,9/2+	–	–
5362.1	5/2+	T½ = 6 fs	→ 2505.3 (100 %)
5404	–	–	–
5422	3/2+,5/2+	–	–
5445	7/2+,9/2+	–	–
5472	3/2+,5/2+	–	–
5500	1/2+	–	–
5512	–	–	–
5525	1/2+	–	–
5545	–	–	–
5564	3/2+,5/2+	–	–
5590	–	–	–
5623	–	–	–
5641	–	–	–
5675	–	–	–
5688	–	–	–
5721	1/2+&(7/2+,9/2+)	–	–
5737	1/2+	–	–
5769	–	–	–
5802	3/2+,5/2+	–	–
5825	3/2+,5/2+	–	–
5844	1/2+	–	–
5864	3/2+,5/2+	–	–
5900	–	–	–
5918	–	–	–
5936	–	–	–
5956	3/2+,5/2+	–	–
5983	3/2+ TO (9/2+)	–	–
6025	3/2+,5/2+	–	–
6044	3/2+,5/2+	–	–
6083	–	–	–
6103	7/2+,9/2+	–	–
6130	1/2+	–	–
6148	–	–	–
6171	3/2+,5/2+	–	–
6187.1	(21/2+)	T½ = 110 fs	→ 4525.5 (100 %)
6194	7/2+,9/2+	–	–
6212	1/2+	–	–
6230	3/2+,5/2+	–	–
6252	7/2+,9/2+	–	–
6270	7/2+,9/2+	–	–
6305	–	–	–
6323	–	–	–
6340	–	–	–
6370	3/2+,5/2+	–	–
6408	3/2+,5/2+	–	–
6427	3/2+,5/2+	–	–
6496	–	–	–
6512	3/2+,5/2+	–	–
6542	1/2+	–	–
6571	3/2+,5/2+	–	–
6589	3/2+,5/2+	–	–
6640	3/2+,5/2+	–	–
6672	3/2+,5/2+	–	–
6703	3/2+,5/2+	–	–
6725	–	–	–
7646.7	1/2-	–	→ 4379.4 (0.9 %), → 3926 (0.9 %), → 3791.6 (0.9 %), → 3427.7 (0.57 %), → 3371.1 (0.8 %), → 3239.9 (0.61 %), → 3182.8 (2.6 %), → 2835.9 (0.71 %), → 2697.2 (2.4 %), → 1725.4 (2.6 %), → 1627.3 (0.52 %), → 1265.5 (17 %), → 1139.9, → 366.76 (0.9 %), → 136.47 (2.5 %), → 14.413 (47 %), → 0 (19 %)
8323	(25/2+)	T½ = < 140 fs	→ 6187.1 (100 %)
10450	(7/2-)	–	–