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Cu
Copper
31 known isotopes (2 stable,
29 radioactive)
53Cu
Mass
52.985894 u
Abundance —
Half-life 130 nanoseconds
Spin/Parity —
Decay Mode(s) Unknown
54Cu
Mass
53.977198 u
Abundance —
Half-life 75 nanoseconds
Spin/Parity 3+
Decay Mode(s) Unknown
55Cu
Mass
54.966038 u
Abundance —
Half-life 55.9 milliseconds
Spin/Parity (3/2-)
Decay Mode(s) EC/β⁺ (100%)
56Cu
Mass
55.958529 u
Abundance —
Half-life 80.4 milliseconds
Spin/Parity (4+)
Decay Mode(s) EC/β⁺ (100%), ECP (0.4%)
57Cu
Mass
56.949212 u
Abundance —
Half-life 196.3 milliseconds
Spin/Parity 3/2-
Decay Mode(s) EC/β⁺ (100%)
58Cu
Mass
57.944532 u
Abundance —
Half-life 3.204 seconds
Spin/Parity 1+
Decay Mode(s) EC/β⁺ (100%)
59Cu
Mass
58.939497 u
Abundance —
Half-life 81.5 seconds
Spin/Parity 3/2-
Decay Mode(s) EC/β⁺ (100%)
60Cu
Mass
59.937364 u
Abundance —
Half-life 23.7 m
Spin/Parity 2+
Decay Mode(s) EC/β⁺ (100%)
61Cu
Mass
60.933457 u
Abundance —
Half-life 3.339 h
Spin/Parity 3/2-
Decay Mode(s) EC/β⁺ (100%)
62Cu
Mass
61.932595 u
Abundance —
Half-life 9.67 m
Spin/Parity 1+
Decay Mode(s) EC/β⁺ (100%)
63Cu Stable
Mass
62.929597 u
Abundance 69.1500%
Half-life Stable
Spin/Parity 3/2-
Decay Mode(s) —
64Cu
Mass
63.929764 u
Abundance —
Half-life 12.7006 h
Spin/Parity 1+
Decay Mode(s) EC/β⁺ (61.5%), β⁻ (38.5%)
65Cu Stable
Mass
64.927789 u
Abundance 30.8500%
Half-life Stable
Spin/Parity 3/2-
Decay Mode(s) —
66Cu
Mass
65.928869 u
Abundance —
Half-life 5.120 m
Spin/Parity 1+
Decay Mode(s) β⁻ (100%)
67Cu
Mass
66.927729 u
Abundance —
Half-life 61.83 h
Spin/Parity 3/2-
Decay Mode(s) β⁻ (100%)
68Cu
Mass
67.929611 u
Abundance —
Half-life 30.9 seconds
Spin/Parity 1+
Decay Mode(s) β⁻ (100%)
69Cu
Mass
68.929429 u
Abundance —
Half-life 2.85 m
Spin/Parity 3/2-
Decay Mode(s) β⁻ (100%)
70Cu
Mass
69.932392 u
Abundance —
Half-life 44.5 seconds
Spin/Parity 6-
Decay Mode(s) β⁻ (100%)
71Cu
Mass
70.932677 u
Abundance —
Half-life 19.4 seconds
Spin/Parity 3/2(-)
Decay Mode(s) β⁻ (100%)
72Cu
Mass
71.935820 u
Abundance —
Half-life 6.63 seconds
Spin/Parity (2)
Decay Mode(s) β⁻ (100%)
73Cu
Mass
72.936674 u
Abundance —
Half-life 4.2 seconds
Spin/Parity 3/2-
Decay Mode(s) β⁻ (100%)
74Cu
Mass
73.939875 u
Abundance —
Half-life 1.63 seconds
Spin/Parity 2-
Decay Mode(s) β⁻ (100%), β⁻n (0%)
75Cu
Mass
74.941524 u
Abundance —
Half-life 1.224 seconds
Spin/Parity 5/2(-)
Decay Mode(s) β⁻ (100%), β⁻n (3.5%)
76Cu
Mass
75.945269 u
Abundance —
Half-life 0.641 seconds
Spin/Parity —
Decay Mode(s) β⁻ (100%), β⁻n (3%)
77Cu
Mass
76.947544 u
Abundance —
Half-life 469.8 milliseconds
Spin/Parity 5/2-
Decay Mode(s) β⁻ (100%), β⁻n (30.1%)
78Cu
Mass
77.951917 u
Abundance —
Half-life 335 milliseconds
Spin/Parity (4- 5- 6-)
Decay Mode(s) β⁻ (100%), β⁻n (65%)
79Cu
Mass
78.954473 u
Abundance —
Half-life 241.0 milliseconds
Spin/Parity —
Decay Mode(s) β⁻ (100%), β⁻n (66%)
80Cu
Mass
79.960623 u
Abundance —
Half-life 113.6 milliseconds
Spin/Parity —
Decay Mode(s) β⁻ (100%)
81Cu
Mass
80.965743 u
Abundance —
Half-life 73.2 milliseconds
Spin/Parity —
Decay Mode(s) β⁻ (100%)
82Cu
Mass
81.972378 u
Abundance —
Half-life 33 milliseconds
Spin/Parity —
Decay Mode(s) β⁻ (100%)
83Cu
Mass
82.978110 u
Abundance —
Half-life Unknown
Spin/Parity —
Decay Mode(s) β⁻ (100%)
Decay mode abbreviations:
β⁻ = Beta minus decay, β⁺ = Beta plus decay, EC = Electron capture, α = Alpha decay
n = Neutron emission, p = Proton emission, SF = Spontaneous fission, IT = Isomeric transition
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