nucdata.tools
Viewer·NJOY Generator·AI Review
37 isotopes · 2 libraryies

Nuclear data
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Modern browser-native viewer for evaluated cross sections. Resonance-aware plots, group-mesh overlays, and reactor-physicist AI reads.

Open the Viewer →U-238 capture · ENDF vs JEFF
Isotopes covered
Hover any element — lit cells have cross-section data.
1
H
2
He
1
3
Li
4
Be
5
B
2
6
C
1
7
N
8
O
1
9
F
10
Ne
11
Na
1
12
Mg
13
Al
14
Si
1
15
P
16
S
17
Cl
18
Ar
19
K
20
Ca
21
Sc
22
Ti
1
23
V
24
Cr
4
25
Mn
1
26
Fe
4
27
Co
28
Ni
5
29
Cu
30
Zn
31
Ga
32
Ge
33
As
34
Se
35
Br
36
Kr
37
Rb
38
Sr
39
Y
40
Zr
41
Nb
42
Mo
7
43
Tc
44
Ru
45
Rh
46
Pd
47
Ag
48
Cd
49
In
50
Sn
51
Sb
52
Te
53
I
54
Xe
55
Cs
56
Ba
57
La
58
Ce
59
Pr
60
Nd
61
Pm
62
Sm
63
Eu
64
Gd
65
Tb
66
Dy
67
Ho
68
Er
69
Tm
70
Yb
71
Lu
72
Hf
73
Ta
74
W
75
Re
76
Os
77
Ir
78
Pt
79
Au
80
Hg
81
Tl
82
Pb
83
Bi
84
Po
85
At
86
Rn
87
Fr
88
Ra
89
Ac
90
Th
91
Pa
92
U
2
93
Np
94
Pu
5
95
Am
1
96
Cm
97
Bk
98
Cf
99
Es
100
Fm
101
Md
102
No
103
Lr
104
Rf
105
Db
106
Sg
107
Bh
108
Hs
109
Mt
110
Ds
111
Rg
112
Cn
113
Nh
114
Fl
115
Mc
116
Lv
117
Ts
118
Og
57–71
89–103

Explore

Instant log-log plots with resonance-peak annotations. Multi-library overlay. Sharable deep links.

Overlay

Drop SHEM-315, WIMS-69, XMAS-172 on any cross section. See how many resonance peaks your mesh actually resolves — in real time.

Read

Click to get a reactor-physicist read: resonance structure, self-shielding pitfalls, group-mesh bias, library-difference patterns. Claude-powered.