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- Critical Temperature of Gold
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Gd
Gadolinium
39 known isotopes (6 stable,
33 radioactive)
134Gd
Mass
133.955416 u
Abundance —
Half-life Unknown
Spin/Parity 0+
Decay Mode(s) Unknown
135Gd
Mass
134.952496 u
Abundance —
Half-life 1.1 seconds
Spin/Parity (5/2+)
Decay Mode(s) EC/β⁺ (100%), ECP (2%)
136Gd
Mass
135.947300 u
Abundance —
Half-life 200 nanoseconds
Spin/Parity 0+
Decay Mode(s) Unknown
137Gd
Mass
136.945020 u
Abundance —
Half-life 2.2 seconds
Spin/Parity (7/2)
Decay Mode(s) EC/β⁺ (100%)
138Gd
Mass
137.940247 u
Abundance —
Half-life 4.7 seconds
Spin/Parity 0+
Decay Mode(s) EC/β⁺ (100%)
139Gd
Mass
138.938130 u
Abundance —
Half-life 5.8 seconds
Spin/Parity (9/2-)
Decay Mode(s) EC/β⁺ (100%), ECP (0%)
140Gd
Mass
139.933674 u
Abundance —
Half-life 15.8 seconds
Spin/Parity 0+
Decay Mode(s) EC/β⁺ (100%)
141Gd
Mass
140.932126 u
Abundance —
Half-life 14 seconds
Spin/Parity 1/2+
Decay Mode(s) EC/β⁺ (100%), β⁺p (0.03%)
142Gd
Mass
141.928116 u
Abundance —
Half-life 70.2 seconds
Spin/Parity 0+
Decay Mode(s) EC/β⁺ (100%)
143Gd
Mass
142.926751 u
Abundance —
Half-life 39 seconds
Spin/Parity (1/2)+
Decay Mode(s) EC/β⁺ (100%)
144Gd
Mass
143.922963 u
Abundance —
Half-life 4.47 m
Spin/Parity 0+
Decay Mode(s) EC/β⁺ (100%)
145Gd
Mass
144.921710 u
Abundance —
Half-life 23.0 m
Spin/Parity 1/2+
Decay Mode(s) EC/β⁺ (100%)
146Gd
Mass
145.918319 u
Abundance —
Half-life 48.27 d
Spin/Parity 0+
Decay Mode(s) EC/β⁺ (100%)
147Gd
Mass
146.919101 u
Abundance —
Half-life 38.06 h
Spin/Parity 7/2-
Decay Mode(s) EC/β⁺ (100%)
148Gd
Mass
147.918121 u
Abundance —
Half-life 71.1 years
Spin/Parity 0+
Decay Mode(s) α (100%)
149Gd
Mass
148.919348 u
Abundance —
Half-life 9.28 d
Spin/Parity 7/2-
Decay Mode(s) EC/β⁺ (100%), α (0.00043%)
150Gd
Mass
149.918664 u
Abundance —
Half-life 1.79E+6 years
Spin/Parity 0+
Decay Mode(s) α (100%)
151Gd
Mass
150.920355 u
Abundance —
Half-life 123.9 d
Spin/Parity 7/2-
Decay Mode(s) Electron capture (100%), α (8e-7%)
152Gd
Mass
151.919798 u
Abundance 0.2000%
Half-life 1.08E14 years
Spin/Parity 0+
Decay Mode(s) α (100%)
153Gd
Mass
152.921757 u
Abundance —
Half-life 240.4 d
Spin/Parity 3/2-
Decay Mode(s) Electron capture (100%)
154Gd Stable
Mass
153.920873 u
Abundance 2.1800%
Half-life Stable
Spin/Parity 0+
Decay Mode(s) —
155Gd Stable
Mass
154.922629 u
Abundance 14.8000%
Half-life Stable
Spin/Parity 3/2-
Decay Mode(s) —
156Gd Stable
Mass
155.922130 u
Abundance 20.4700%
Half-life Stable
Spin/Parity 0+
Decay Mode(s) —
157Gd Stable
Mass
156.923967 u
Abundance 15.6500%
Half-life Stable
Spin/Parity 3/2-
Decay Mode(s) —
158Gd Stable
Mass
157.924111 u
Abundance 24.8400%
Half-life Stable
Spin/Parity 0+
Decay Mode(s) —
159Gd
Mass
158.926396 u
Abundance —
Half-life 18.479 h
Spin/Parity 3/2-
Decay Mode(s) β⁻ (100%)
160Gd Stable
Mass
159.927061 u
Abundance 21.8600%
Half-life Stable
Spin/Parity 0+
Decay Mode(s) —
161Gd
Mass
160.929676 u
Abundance —
Half-life 3.66 m
Spin/Parity 5/2-
Decay Mode(s) β⁻ (100%)
162Gd
Mass
161.930992 u
Abundance —
Half-life 8.4 m
Spin/Parity 0+
Decay Mode(s) β⁻ (100%)
163Gd
Mass
162.934097 u
Abundance —
Half-life 68 seconds
Spin/Parity (5/2- 7/2+)
Decay Mode(s) β⁻ (100%)
164Gd
Mass
163.935916 u
Abundance —
Half-life 45 seconds
Spin/Parity 0+
Decay Mode(s) β⁻ (100%)
165Gd
Mass
164.939317 u
Abundance —
Half-life 10.3 seconds
Spin/Parity —
Decay Mode(s) β⁻ (100%)
166Gd
Mass
165.941630 u
Abundance —
Half-life 4.8 seconds
Spin/Parity 0+
Decay Mode(s) β⁻ (100%)
167Gd
Mass
166.945490 u
Abundance —
Half-life 4.26 seconds
Spin/Parity (5/2-)
Decay Mode(s) β⁻ (100%)
168Gd
Mass
167.948309 u
Abundance —
Half-life 3.03 seconds
Spin/Parity 0+
Decay Mode(s) β⁻ (100%)
169Gd
Mass
168.952882 u
Abundance —
Half-life 0.75 seconds
Spin/Parity (7/2-)
Decay Mode(s) β⁻ (100%)
170Gd
Mass
169.956146 u
Abundance —
Half-life 0.41 seconds
Spin/Parity 0+
Decay Mode(s) β⁻ (100%)
171Gd
Mass
170.961127 u
Abundance —
Half-life Unknown
Spin/Parity —
Decay Mode(s) β⁻ (100%)
172Gd
Mass
171.964605 u
Abundance —
Half-life Unknown
Spin/Parity 0+
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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