{{위키데이터 속성 추적}}
자연계에 존재하는 [[사마륨]]의 동위 원소는 <sup>144</sup>Sm, <sup>144</sup>Sm, <sup>147</sup>Sm, <sup>148</sup>Sm, <sup>149</sup>Sm, <sup>150</sup>Sm, <sup>152</sup>Sm, <sup>154</sup>Sm이 존재한다.

이들 중 <sup>147</sup>Sm과 <sup>148</sup>Sm은 방사성 동위 원소로 <sup>147</sup>Sm은 사마륨-네오디뮴 연대 측정에 이용된다.
<sup>146</sup>Sm은 반감기가 1.03 x 10<sup>8</sup> 년으로 매우 짧기 때문에 대부분 다 붕괴하고 현재는 매우 극미량이 존재한다

<sup>149</sup>Sm은 중성자 흡수율이 매우 높아 중성자 흡수재로 이용된다.

== 표 ==
{| class="wikitable" style="font-size:95%; white-space:nowrap"
! rowspan="2" | 핵자<br />수
! Z([[양성자|p]])
! N([[중성자|n]])
! &nbsp;<br />동위 원소 질량 (u)<br />&nbsp;
! rowspan="2" | 반감기<ref group="n">안정 동위 원소는 굵은체로 표기, 우주의 나이보다 반감기가 긴 동위 원소의 반감기는 굵은 흘림체로 표기</ref>
! rowspan="2" | 붕괴<br />방식<ref>http://www.nucleonica.net/unc.aspx</ref><ref group="n">약어:<br />ε: [[전자 포획]]<br />IT: [[이성질핵 전이]]</ref>
! rowspan="2" | 붕괴 생성<br />동위 원소<ref group="n">안정 동위 원소는 굵은 글씨로 표기, 우주의 나이보다 반감기가 긴 동위 원소는 굵은 흘림체로 표기</ref>
! rowspan="2" | 핵<br />스핀
! rowspan="2" | 자연계에 존재하는<br />동위 원소<br />범위<br />(몰 분율)
! rowspan="2" | 자연계에 존재하는<br />최대 범위<br />(몰 분율)
|-
! colspan="3" | 들뜬 에너지
|-
| <sup>128</sup>Sm
| style="text-align:right" | 62
| style="text-align:right" | 66
| 127.95808(54)#
| 0.5# s
|
|
| 0+
|
|
|-
| <sup>129</sup>Sm
| style="text-align:right" | 62
| style="text-align:right" | 67
| 128.95464(54)#
| 550(100) ms
|
|
| 5/2+#
|
|
|-
| <sup>130</sup>Sm
| style="text-align:right" | 62
| style="text-align:right" | 68
| 129.94892(43)#
| 1# s
| [[베타 붕괴|β<sup>+</sup>]]
| <sup>130</sup>Pm
| 0+
|
|
|-
| rowspan=2|<sup>131</sup>Sm
| rowspan=2 style="text-align:right" | 62
| rowspan=2 style="text-align:right" | 69
| rowspan=2|130.94611(32)#
| rowspan=2|1.2(2) s
| β<sup>+</sup>
| <sup>131</sup>Pm
| rowspan=2|5/2+#
| rowspan=2|
| rowspan=2|
|-
| β<sup>+</sup>, [[양성자 방출|p]] (드묾)
| <sup>130</sup>Nd
|-
| rowspan=2|<sup>132</sup>Sm
| rowspan=2 style="text-align:right" | 62
| rowspan=2 style="text-align:right" | 70
| rowspan=2|131.94069(32)#
| rowspan=2|4.0(3) s
| β<sup>+</sup>
| <sup>132</sup>Pm
| rowspan=2|0+
| rowspan=2|
| rowspan=2|
|-
| β<sup>+</sup>, p
| <sup>131</sup>Nd
|-
| rowspan=2|<sup>133</sup>Sm
| rowspan=2 style="text-align:right" | 62
| rowspan=2 style="text-align:right" | 71
| rowspan=2|132.93867(21)#
| rowspan=2|2.90(17) s
| β<sup>+</sup>
| <sup>133</sup>Pm
| rowspan=2|(5/2+)
| rowspan=2|
| rowspan=2|
|-
| β<sup>+</sup>, p
| <sup>132</sup>Nd
|-
| <sup>134</sup>Sm
| style="text-align:right" | 62
| style="text-align:right" | 72
| 133.93397(21)#
| 10(1) s
| β<sup>+</sup>
| <sup>134</sup>Pm
| 0+
|
|
|-
| rowspan=2|<sup>135</sup>Sm
| rowspan=2 style="text-align:right" | 62
| rowspan=2 style="text-align:right" | 73
| rowspan=2|134.93252(17)
| rowspan=2|10.3(5) s
| β<sup>+</sup> (99.98%)
| <sup>135</sup>Pm
| rowspan=2|(7/2+)
| rowspan=2|
| rowspan=2|
|-
| β<sup>+</sup>, p (0.02%)
| <sup>134</sup>Nd
|-
| style="text-indent:1em" | <sup>135m</sup>Sm
| colspan="3" style="text-indent:2em" | 0(300)# keV
| 2.4(9) s
| β<sup>+</sup>
| <sup>135</sup>Pm
| (3/2+,5/2+)
|
|
|-
| <sup>136</sup>Sm
| style="text-align:right" | 62
| style="text-align:right" | 74
| 135.928276(13)
| 47(2) s
| β<sup>+</sup>
| <sup>136</sup>Pm
| 0+
|
|
|-
| style="text-indent:1em" | <sup>136m</sup>Sm
| colspan="3" style="text-indent:2em" | 2264.7(11) keV
| 15(1) µs
|
|
| (8-)
|
|
|-
| <sup>137</sup>Sm
| style="text-align:right" | 62
| style="text-align:right" | 75
| 136.92697(5)
| 45(1) s
| β<sup>+</sup>
| <sup>137</sup>Pm
| (9/2-)
|
|
|-
| style="text-indent:1em" | <sup>137m</sup>Sm
| colspan="3" style="text-indent:2em" | 180(50)# keV
| 20# s
| β<sup>+</sup>
| <sup>137</sup>Pm
| 1/2+#
|
|
|-
| <sup>138</sup>Sm
| style="text-align:right" | 62
| style="text-align:right" | 76
| 137.923244(13)
| 3.1(2) min
| β<sup>+</sup>
| <sup>138</sup>Pm
| 0+
|
|
|-
| <sup>139</sup>Sm
| style="text-align:right" | 62
| style="text-align:right" | 77
| 138.922297(12)
| 2.57(10) min
| β<sup>+</sup>
| <sup>139</sup>Pm
| 1/2+
| 
| 
|-
| rowspan=2 style="text-indent:1em" | <sup>139m</sup>Sm
| rowspan=2 colspan="3" style="text-indent:2em" | 457.40(22) keV
| rowspan=2|10.7(6) s
| [[이성질핵 전이|IT]] (93.7%)
| <sup>139</sup>Sm
| rowspan=2|11/2-
| rowspan=2|
| rowspan=2|
|-
| β<sup>+</sup> (6.3%)
| <sup>139</sup>Pm
|-
| <sup>140</sup>Sm
| style="text-align:right" | 62
| style="text-align:right" | 78
| 139.918995(13)
| 14.82(12) min
| β<sup>+</sup>
| <sup>140</sup>Pm
| 0+
|
|
|-
| <sup>141</sup>Sm
| style="text-align:right" | 62
| style="text-align:right" | 79
| 140.918476(9)
| 10.2(2) min
| β<sup>+</sup>
| <sup>141</sup>Pm
| 1/2+
|
|
|-
| rowspan=2 style="text-indent:1em" | <sup>141m</sup>Sm
| rowspan=2 colspan="3" style="text-indent:2em" | 176.0(3) keV
| rowspan=2|22.6(2) min
| β<sup>+</sup> (99.69%)
| <sup>141</sup>Pm
| rowspan=2|11/2-
| rowspan=2|
| rowspan=2|
|-
| IT (0.31%)
| <sup>141</sup>Sm
|-
| <sup>142</sup>Sm
| style="text-align:right" | 62
| style="text-align:right" | 80
| 141.915198(6)
| 72.49(5) min
| β<sup>+</sup>
| <sup>142</sup>Pm
| 0+
|
|
|-
| <sup>143</sup>Sm
| style="text-align:right" | 62
| style="text-align:right" | 81
| 142.914628(4)
| 8.75(8) min
| β<sup>+</sup>
| <sup>143</sup>Pm
| 3/2+
|
|
|-
| rowspan=2 style="text-indent:1em" | <sup>143m1</sup>Sm
| rowspan=2 colspan="3" style="text-indent:2em" | 753.99(16) keV
| rowspan=2|66(2) s
| IT (99.76%)
| <sup>143</sup>Sm
| rowspan=2|11/2-
| rowspan=2|
| rowspan=2|
|-
| β<sup>+</sup> (0.24%)
| <sup>143</sup>Pm
|-
| style="text-indent:1em" | <sup>143m2</sup>Sm
| colspan="3" style="text-indent:2em" | 2793.8(13) keV
| 30(3) ms
|
|
| 23/2(-)
|
|
|-
| <sup>144</sup>Sm
| style="text-align:right" | 62
| style="text-align:right" | 82
| 143.911999(3)
| colspan=3 align=center|'''[[안정 동위 원소|안정]]'''<ref group="n">[[알파 붕괴]]를 통해 <sup>140</sup>Nd으로 붕괴하거나 또는 β<sup>+</sup>β<sup>+</sup> 붕괴를 통해 '''''<sup>144</sup>Nd'''''으로 붕괴할 수 있다.</ref>
| 0+
| 0.0307(7)
|
|-
| style="text-indent:1em" | <sup>144m</sup>Sm
| colspan="3" style="text-indent:2em" | 2323.60(8) keV
| 880(25) ns
|
|
| 6+
|
|
|-
| <sup>145</sup>Sm
| style="text-align:right" | 62
| style="text-align:right" | 83
| 144.913410(3)
| 340(3) d
| [[전자 포획|ε]]
| <sup>145</sup>Pm
| 7/2-
|
|
|-
| style="text-indent:1em" | <sup>145m</sup>Sm
| colspan="3" style="text-indent:2em" | 8786.2(7) keV
| 990(170) ns<br />[0.96(+19-15) µs]
|
|
| (49/2+)
|
|
|-
| <sup>146</sup>Sm<ref group="n" name="PN">태양계 초창기부터 존재해 왔었던 방사성 핵자</ref>
| style="text-align:right" | 62
| style="text-align:right" | 84
| 145.913041(4)
| 1.03(5)×10<sup>8</sup> a
| [[알파 붕괴|α]]
| '''<sup>142</sup>Nd'''
| 0+
| 미량
|
|-
| <sup>147</sup>Sm<ref group="n" name="PN" /><ref group="n" name="FP">핵분열 생성물</ref><ref group="n">사마륨-네오디뮴 연대 측정에 이용</ref>
| style="text-align:right" | 62
| style="text-align:right" | 85
| 146.9148979(26)
| '''1.06(2)×10<sup>11</sup> a'''
| α
| '''<sup>143</sup>Nd'''
| 7/2-
| 0.1499(18)
|
|-
| <sup>148</sup>Sm<ref group="n" name="PN" />
| style="text-align:right" | 62
| style="text-align:right" | 86
| 147.9148227(26)
| '''7(3)×10<sup>15</sup> a'''
| α
| '''''<sup>144</sup>Nd'''''
| 0+
| 0.1124(10)
|
|-
| <sup>149</sup>Sm<ref group="n" name="FP" /><ref group="n" name="NP">중성자 흡수제로 이용</ref>
| style="text-align:right" | 62
| style="text-align:right" | 87
| 148.9171847(26)
| colspan=3 align=center|'''관찰 안정'''<ref group="n">알파 붕괴를 통해 '''<sup>145</sup>Nd'''으로 붕괴할 수 있으며 반감기는 5.2×10<sup>19</sup> 년을 초과할 것으로 예상된다.</ref>
| 7/2-
| 0.1382(7)
|
|-
| <sup>150</sup>Sm
| style="text-align:right" | 62
| style="text-align:right" | 88
| 149.9172755(26)
| colspan=3 align=center|'''안정'''<ref group="n">α 붕괴를 통해 '''<sup>146</sup>Nd'''으로 붕괴할 수 있다.</ref>
| 0+
| 0.0738(1)
|
|-
| <sup>151</sup>Sm<ref group="n" name="FP" /><ref group="n" name="NP" />
| style="text-align:right" | 62
| style="text-align:right" | 89
| 150.9199324(26)
| 90(8) a
| β<sup>-</sup>
| '''''<sup>151</sup>Eu'''''
| 5/2-
|
|
|-
| style="text-indent:1em" | <sup>151m</sup>Sm
| colspan="3" style="text-indent:2em" | 261.13(4) keV
| 1.4(1) µs
|
|
| (11/2)-
|
|
|-
| <sup>152</sup>Sm<ref group="n" name="FP" />
| style="text-align:right" | 62
| style="text-align:right" | 90
| 151.9197324(27)
| colspan=3 align=center|'''안정'''<ref group="n">α 붕괴를 통해 '''<sup>148</sup>Nd'''으로 붕괴할 수 있다.</ref>
| 0+
| 0.2675(16)
|
|-
| <sup>153</sup>Sm<ref group="n" name="FP" />
| style="text-align:right" | 62
| style="text-align:right" | 91
| 152.9220974(27)
| 46.284(4) h
| β<sup>-</sup>
| '''<sup>153</sup>Eu'''
| 3/2+
|
|
|-
| style="text-indent:1em" | <sup>153m</sup>Sm
| colspan="3" style="text-indent:2em" | 98.37(10) keV
| 10.6(3) ms
| IT
| <sup>153</sup>Sm
| 11/2-
|
|
|-
| <sup>154</sup>Sm<ref group="n" name="FP" />
| style="text-align:right" | 62
| style="text-align:right" | 92
| 153.9222093(27)
| colspan=3 align=center|'''관찰 안정'''<ref group="n">β<sup>-</sup>β<sup>-</sup> 붕괴를 통해 '''<sup>154</sup>Gd'''으로 붕괴할 수 있으며 반감기는 1.4×10<sup>21</sup> 년을 초과할 것으로 예상된다.</ref>
| 0+
| 0.2275(29)
|
|-
| <sup>155</sup>Sm
| style="text-align:right" | 62
| style="text-align:right" | 93
| 154.9246402(28)
| 22.3(2) min
| β<sup>-</sup>
| <sup>155</sup>Eu
| 3/2-
|
|
|-
| <sup>156</sup>Sm
| style="text-align:right" | 62
| style="text-align:right" | 94
| 155.925528(10)
| 9.4(2) h
| β<sup>-</sup>
| <sup>156</sup>Eu
| 0+
|
|
|-
| style="text-indent:1em" | <sup>156m</sup>Sm
| colspan="3" style="text-indent:2em" | 1397.55(9) keV
| 185(7) ns
|
|
| 5-
|
|
|-
| <sup>157</sup>Sm
| style="text-align:right" | 62
| style="text-align:right" | 95
| 156.92836(5)
| 8.03(7) min
| β<sup>-</sup>
| <sup>157</sup>Eu
| (3/2-)
|
|
|-
| <sup>158</sup>Sm
| style="text-align:right" | 62
| style="text-align:right" | 96
| 157.92999(8)
| 5.30(3) min
| β<sup>-</sup>
| <sup>158</sup>Eu
| 0+
|
|
|-
| <sup>159</sup>Sm
| style="text-align:right" | 62
| style="text-align:right" | 97
| 158.93321(11)
| 11.37(15) s
| β<sup>-</sup>
| <sup>159</sup>Eu
| 5/2-
|
|
|-
| <sup>160</sup>Sm
| style="text-align:right" | 62
| style="text-align:right" | 98
| 159.93514(21)#
| 9.6(3) s
| β<sup>-</sup>
| <sup>160</sup>Eu
| 0+
|
|
|-
| <sup>161</sup>Sm
| style="text-align:right" | 62
| style="text-align:right" | 99
| 160.93883(32)#
| 4.8(8) s
| β<sup>-</sup>
| <sup>161</sup>Eu
| 7/2+#
|
|
|-
| <sup>162</sup>Sm
| style="text-align:right" | 62
| style="text-align:right" | 100
| 161.94122(54)#
| 2.4(5) s
| β<sup>-</sup>
| <sup>162</sup>Eu
| 0+
|
|
|-
| <sup>163</sup>Sm
| style="text-align:right" | 62
| style="text-align:right" | 101
| 162.94536(75)#
| 1# s
| β<sup>-</sup>
| <sup>163</sup>Eu
| 1/2-#
|
|
|-
| <sup>164</sup>Sm
| style="text-align:right" | 62
| style="text-align:right" | 102
| 163.94828(86)#
| 500# ms
| β<sup>-</sup>
| <sup>164</sup>Eu
| 0+
|
|
|-
| <sup>165</sup>Sm
| style="text-align:right" | 62
| style="text-align:right" | 103
| 164.95298(97)#
| 200# ms
| β<sup>-</sup>
| <sup>165</sup>Eu
| 5/2-#
|
|
|}
{{각주|group="n"}}

== 각주 ==
{{각주}}

{{동위 원소 색인}}

[[분류:사마륨|동위 원소]]
[[분류:사마륨 동위 원소| ]]
[[분류:원소별 동위 원소 목록]]