Изотопи на тербиумот

Природниот тербиум (<sub>65</sub>Tb) е составен од еден стабилен изотоп, <sup>159</sup>Tb. Карактеризирани се 37 радиоизотопи, од кои најстабилни се <sup>158</sup> Tb со полуживот од 180 години, <sup>157</sup>Tb со период на полураспаѓање од 71 година и <sup>160</sup> Tb со полуживот од 72,3 дена. Сите преостанати радиоактивни изотопи имаат период на полураспаѓање кој е помал од 6.907 дена, а поголемиот дел од нив имаат полуживот помал од 24 секунди. Овој елемент има и 27 мета состојби, со најстабилни <sup>156m1</sup>Tb (t <sub>1/2</sub> = 24,4 часа), <sup>154m2</sup> Tb (t<sub>1/2</sub> = 22,7 часа) и <sup>154m1</sup> Tb (t<sub>1/2</sub> = 9,4 часа).
Примарниот режим на распаѓање пред најзастапениот стабилен изотоп, <sup>159</sup>Tb, е фаќање електрони, а примарниот режим зад е бета распаѓањето. Примарните производи на распаѓање пред <sup>159</sup> Tb се изотопи на елементот Gd (гадолиниум), а примарните производи по <sup>159</sup> Tb се изотопи на елементот Dy (диспрозиум).
1 Список на изотопи
<sup>135</sup>Tb, 65, 70, 134.96452(43)#, 1.01(28) ms, p, <sup>134</sup>Gd, (7/2−)
<sup>139</sup>Tb, 65, 74, 138.94833(32)#, 1.6(2) s, β<sup>+</sup>, <sup>139</sup>Gd, 5/2−#
<sup>140</sup>Tb, 65, 75, 139.94581(86), 2.29(15) s, β<sup>+</sup> (99.74%), <sup>140</sup>Gd, (7+)
EC (<3%), <sup>140</sup>Gd
β<sup>+</sup>, p (0.26%), <sup>139</sup>Eu
<sup>141</sup>Tb, 65, 76, 140.94145(11), 3.5(2) s, β<sup>+</sup>, <sup>141</sup>Gd, (5/2−)
<sup>141m</sup>Tb, 0(200)# keV, 7.9(6) s, β<sup>+</sup>, <sup>141</sup>Gd, 11/2−#
<sup>142</sup>Tb, 65, 77, 141.93928(75), 597(17) ms, β<sup>+</sup> (96.8%), <sup>142</sup>Gd, 1+
EC (3.2%), <sup>142</sup>Gd
β<sup>+</sup>, p (0.0022%), <sup>141</sup>Eu
<sup>142m1</sup>Tb, 279.7(4) keV, 303(17) ms, IT, <sup>142</sup>Tb, 5−
<sup>142m2</sup>Tb, 652.1(6) keV, 26(1) μs, IT, <sup>142</sup>Tb, 8+
<sup>143</sup>Tb, 65, 78, 142.935137(55), 12(1) s, β<sup>+</sup>, <sup>143</sup>Gd, (11/2−)
<sup>143m</sup>Tb, 0(100)# keV, 17(4) s, 5/2+#
<sup>144</sup>Tb, 65, 79, 143.933045(30), ~1 s, β<sup>+</sup>, <sup>144</sup>Gd, 1+
<sup>144m1</sup>Tb, 396.9(5) keV, 4.25(15) s, IT (66%), <sup>144</sup>Tb, 6−
β<sup>+</sup> (34%), <sup>144</sup>Gd
<sup>144m2</sup>Tb, 476.2(5) keV, 2.8(3) μs, IT, <sup>144</sup>Tb, (8−)
<sup>144m3</sup>Tb, 517.1(5) keV, 670(60) ns, IT, <sup>144</sup>Tb, (9+)
<sup>144m4</sup>Tb, 544.5(6) keV, <300 ns, IT, <sup>144</sup>Tb, (10+)
<sup>145</sup>Tb, 65, 80, 144.92872(12), 30.9(6) s, β<sup>+</sup>, <sup>145</sup>Gd, (11/2−)
<sup>145m</sup>Tb, 860(230) keV, (3/2+)
<sup>146</sup>Tb, 65, 81, 145.927253(48), 8(4) s, β<sup>+</sup>, <sup>146</sup>Gd, 1+
<sup>146m1</sup>Tb, 150(100)# keV, 24.1(5) s, β<sup>+</sup>, <sup>146</sup>Gd, 5−
<sup>146m2</sup>Tb, 930(100)# keV, 1.18(2) ms, IT, <sup>146</sup>Tb, 10+
<sup>147</sup>Tb, 65, 82, 146.9240546(87), 1.64(3) h, β<sup>+</sup>, <sup>147</sup>Gd, (1/2+)
<sup>147m</sup>Tb, 50.6(9) keV, 1.87(5) min, β<sup>+</sup>, <sup>147</sup>Gd, (11/2−)
<sup>148</sup>Tb, 65, 83, 147.924275(13), 60(1) min, β<sup>+</sup>, <sup>148</sup>Gd, 2−
<sup>148m1</sup>Tb, 90.1(3) keV, 2.20(5) min, β<sup>+</sup>, <sup>148</sup>Gd, (9)+
<sup>148m2</sup>Tb, 8618.6(10) keV, 1.310(7) μs, IT, <sup>148</sup>Tb, (27+)
<sup>149</sup>Tb, 65, 84, 148.9232538(39), 4.118(25) h, β<sup>+</sup> (83.3%), <sup>149</sup>Gd, 1/2+
α (16.7%), <sup>145</sup>Eu
<sup>149m</sup>Tb, 35.78(13) keV, 4.16(4) min, β<sup>+</sup> (99.98%), <sup>149</sup>Gd, 11/2−
α (0.022%), <sup>145</sup>Eu
<sup>150</sup>Tb, 65, 85, 149.9236648(79), 3.48(16) h, β<sup>+</sup>, <sup>150</sup>Gd, (2)−
<sup>150m</sup>Tb, 461(27) keV, 5.8(2) min, β<sup>+</sup>, <sup>150</sup>Gd, 9+
<sup>151</sup>Tb, 65, 86, 150.9231090(44), 17.609(1) h, β<sup>+</sup> (99.99%), <sup>151</sup>Gd, 1/2+
α (.0095%), <sup>147</sup>Eu
<sup>151m</sup>Tb, 99.53(5) keV, 25(3) s, IT (93.4%), <sup>151</sup>Tb, 11/2−
β<sup>+</sup> (6.6%), <sup>151</sup>Gd
<sup>152</sup>Tb, 65, 87, 151.924082(43), 17.8784(95) h, EC (83%), ''<sup>152</sup>Gd'', 2−
β<sup>+</sup> (17%)
α (<7×10<sup>−7</sup>%), <sup>148</sup>Eu
<sup>152m1</sup>Tb, 342.15(16) keV, 960(10) ns, IT, <sup>152</sup>Tb, 5−
<sup>152m2</sup>Tb, 501.74(19) keV, 4.2(1) min, IT (78.9%), <sup>152</sup>Tb, 8+
β<sup>+</sup> (21.1%), ''<sup>152</sup>Gd''<sup>153</sup>Tb, 65, 88, 152.9234417(42), 2.34(1) d, β<sup>+</sup>, <sup>153</sup>Gd, 5/2+
<sup>153m</sup>Tb, 163.175(5) keV, 186(4) μs, IT, <sup>153</sup>Tb, 11/2−
<sup>154</sup>Tb, 65, 89, 153.924684(49), 9.994(39) h, β<sup>+</sup>, <sup>154</sup>Gd, 3−
<sup>154m1</sup>Tb, 130(50)# keV, 21.5(4) h, β<sup>+</sup>, <sup>154</sup>Gd, 0−
<sup>154m2</sup>Tb, 200(150)# keV, 22.7(5) h, β<sup>+</sup>, <sup>154</sup>Gd, 7−
<sup>154m3</sup>Tb, 405(150)# keV, 513(42) ns, IT, <sup>154</sup>Tb
<sup>155</sup>Tb, 65, 90, 154.923510(11), 5.32(6) d, EC, <sup>155</sup>Gd, 3/2+
<sup>156</sup>Tb, 65, 91, 155.9247542(40), 5.35(10) d, β<sup>+</sup>, <sup>156</sup>Gd, 3−
<sup>156m1</sup>Tb, 88.4(2) keV, 5.3(2) h, IT, <sup>156</sup>Tb, (0+)
<sup>156m2</sup>Tb, 100(50)# keV, 24.4(10) h, IT, <sup>156</sup>Tb, (7−)
<sup>157</sup>Tb, 65, 92, 156.9240319(11), 71(7) y, EC, <sup>157</sup>Gd, 3/2+
<sup>158</sup>Tb, 65, 93, 157.9254199(14), 180(11) y, β<sup>+</sup> (83.4%), <sup>158</sup>Gd, 3−
β<sup>−</sup> (16.6%), <sup>158</sup>Dy
<sup>158m1</sup>Tb, 110.3(12) keV, 10.70(17) s, IT, <sup>158</sup>Tb, 0−
<sup>158m2</sup>Tb, 388.39(11) keV, 0.40(4) ms, IT, <sup>158</sup>Tb, 7−
<sup>159</sup>Tb, 65, 94, 158.9253537(12), Stable, 3/2+, 1.0000
<sup>160</sup>Tb, 65, 95, 159.9271746(12), 72.3(2) d, β<sup>−</sup>, <sup>160</sup>Dy, 3−
<sup>161</sup>Tb, 65, 96, 160.9275768(13), 6.948(5) d, β<sup>−</sup>, <sup>161</sup>Dy, 3/2+
<sup>162</sup>Tb, 65, 97, 161.9292754(22), 7.60(15) min, β<sup>−</sup>, <sup>162</sup>Dy, (1−)
<sup>162m</sup>Tb, 286(3) keV, 10# min, 4−#
<sup>163</sup>Tb, 65, 98, 162.9306536(44), 19.5(3) min, β<sup>−</sup>, <sup>163</sup>Dy, 3/2+
<sup>164</sup>Tb, 65, 99, 163.9333276(20), 3.0(1) min, β<sup>−</sup>, <sup>164</sup>Dy, (5+)
<sup>164m</sup>Tb, 145(12) keV, 2# min, 2+#
<sup>165</sup>Tb, 65, 100, 164.9349552(17), 2.11(10) min, β<sup>−</sup>, <sup>165</sup>Dy, (3/2+)
<sup>165m</sup>Tb, 207(5) keV, 0.81(8) μs, IT, <sup>165</sup>Tb, (7/2−)
<sup>166</sup>Tb, 65, 101, 165.9379397(16), 27.1(15) s, β<sup>−</sup>, <sup>166</sup>Dy, (1−)
<sup>166m</sup>Tb, 159.0(15) keV, 3.5(4) μs, IT, <sup>166</sup>Tb, 4−#
<sup>167</sup>Tb, 65, 102, 166.9400070(21), 18.9(16) s, β<sup>−</sup>, <sup>167</sup>Dy, (3/2+)
<sup>167m</sup>Tb, 200(6) keV, 1.2(1) μs, IT, <sup>167</sup>Tb, (7/2−)
<sup>168</sup>Tb, 65, 103, 167.9433371(45), 9.4(4) s, β<sup>−</sup>, <sup>168</sup>Dy, (4−)
<sup>168m</sup>Tb, 211(1) keV, 0.71(3) μs, IT, <sup>168</sup>Tb, (6+)
<sup>169</sup>Tb, 65, 104, 168.94581(32)#, 5.13(32) s, β<sup>−</sup>, <sup>169</sup>Dy, 3/2+#
<sup>170</sup>Tb, 65, 105, 169.94986(32)#, 960(78) ms, β<sup>−</sup>, <sup>170</sup>Dy, 2−#
<sup>171</sup>Tb, 65, 106, 170.95301(43)#, 1.23(10) s, β<sup>−</sup>, <sup>171</sup>Dy, 3/2+#
<sup>172</sup>Tb, 65, 107, 171.95739(54)#, 760(190) ms, β<sup>−</sup>, <sup>172</sup>Dy, 6+#
<sup>173</sup>Tb, 65, 108, 172.96081(54)#, 400# ms[>550 ns], 3/2+#
<sup>174</sup>Tb, 65, 109, 173.96568(54)#, 240# ms[>550 ns], 2−#