釤的同位素

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原子量:150.36(2))的同位素,其中有5個同位素是在觀測上穩定的。

圖表[编辑]

符號 Z(p N(n 同位素質量(u 半衰期[n 1] 衰變
方式
[1][n 2]
衰變
產物
[n 3]
原子核
自旋
相對豐度
莫耳分率)
相對豐度
的變化量
莫耳分率)
激發能量
128Sm 62 66 127.95808(54)# 0.5# s 0+
129Sm 62 67 128.95464(54)# 550(100) ms 5/2+#
130Sm 62 68 129.94892(43)# 1# s β+ 130Pm 0+
131Sm 62 69 130.94611(32)# 1.2(2) s β+ 131Pm 5/2+#
β+, p (不常見) 130Nd
132Sm 62 70 131.94069(32)# 4.0(3) s β+ 132Pm 0+
β+, p 131Nd
133Sm 62 71 132.93867(21)# 2.90(17) s β+ 133Pm (5/2+)
β+, p 132Nd
134Sm 62 72 133.93397(21)# 10(1) s β+ 134Pm 0+
135Sm 62 73 134.93252(17) 10.3(5) s β+ (99.98%) 135Pm (7/2+)
β+, p (.02%) 134Nd
135mSm 0(300)# keV 2.4(9) s β+ 135Pm (3/2+,5/2+)
136Sm 62 74 135.928276(13) 47(2) s β+ 136Pm 0+
136mSm 2264.7(11) keV 15(1) µs (8-)
137Sm 62 75 136.92697(5) 45(1) s β+ 137Pm (9/2-)
137mSm 180(50)# keV 20# s β+ 137Pm 1/2+#
138Sm 62 76 137.923244(13) 3.1(2) min β+ 138Pm 0+
139Sm 62 77 138.922297(12) 2.57(10) min β+ 139Pm 1/2+
139mSm 457.40(22) keV 10.7(6) s IT (93.7%) 139Sm 11/2-
β+ (6.3%) 139Pm
140Sm 62 78 139.918995(13) 14.82(12) min β+ 140Pm 0+
141Sm 62 79 140.918476(9) 10.2(2) min β+ 141Pm 1/2+
141mSm 176.0(3) keV 22.6(2) min β+ (99.69%) 141Pm 11/2-
IT (.31%) 141Sm
142Sm 62 80 141.915198(6) 72.49(5) min β+ 142Pm 0+
143Sm 62 81 142.914628(4) 8.75(8) min β+ 143Pm 3/2+
143m1Sm 753.99(16) keV 66(2) s IT (99.76%) 143Sm 11/2-
β+ (.24%) 143Pm
143m2Sm 2793.8(13) keV 30(3) ms 23/2(-)
144Sm 62 82 143.911999(3) 觀測上穩定[n 4] 0+ 0.0307(7)
144mSm 2323.60(8) keV 880(25) ns 6+
145Sm 62 83 144.913410(3) 340(3) d ε 145Pm 7/2-
145mSm 8786.2(7) keV 990(170) ns
[0.96(+19-15) µs]
(49/2+)
146Sm[n 5] 62 84 145.913041(4) 1.03(5)×108 a α 142Nd 0+ Trace
147Sm[n 5][n 6][n 7] 62 85 146.9148979(26) 1.06(2)×1011 a α 143Nd 7/2- 0.1499(18)
148Sm[n 5] 62 86 147.9148227(26) 7(3)×1015 a α 144Nd 0+ 0.1124(10)
149Sm[n 6][n 8] 62 87 148.9171847(26) 觀測上穩定[n 9] 7/2- 0.1382(7)
150Sm 62 88 149.9172755(26) 觀測上穩定[n 10] 0+ 0.0738(1)
151Sm[n 6][n 8] 62 89 150.9199324(26) 88.8(24) a β 151Eu 5/2-
151mSm 261.13(4) keV 1.4(1) µs (11/2)-
152Sm[n 6] 62 90 151.9197324(27) 觀測上穩定[n 11] 0+ 0.2675(16)
153Sm[n 6] 62 91 152.9220974(27) 46.284(4) h β 153Eu 3/2+
153mSm 98.37(10) keV 10.6(3) ms IT 153Sm 11/2-
154Sm[n 6] 62 92 153.9222093(27) 觀測上穩定[n 12] 0+ 0.2275(29)
155Sm 62 93 154.9246402(28) 22.3(2) min β 155Eu 3/2-
156Sm 62 94 155.925528(10) 9.4(2) h β 156Eu 0+
156mSm 1397.55(9) keV 185(7) ns 5-
157Sm 62 95 156.92836(5) 8.03(7) min β 157Eu (3/2-)
158Sm 62 96 157.92999(8) 5.30(3) min β 158Eu 0+
159Sm 62 97 158.93321(11) 11.37(15) s β 159Eu 5/2-
160Sm 62 98 159.93514(21)# 9.6(3) s β 160Eu 0+
161Sm 62 99 160.93883(32)# 4.8(8) s β 161Eu 7/2+#
162Sm 62 100 161.94122(54)# 2.4(5) s β 162Eu 0+
163Sm 62 101 162.94536(75)# 1# s β 163Eu 1/2-#
164Sm 62 102 163.94828(86)# 500# ms β 164Eu 0+
165Sm 62 103 164.95298(97)# 200# ms β 165Eu 5/2-#

備註:畫上#號的數據代表沒有經過實驗的証明,只是理論推測而已,而用括號括起來的代表數據不確定性。


同位素列表
钷的同位素 釤的同位素 銪的同位素

註釋[编辑]

  1. ^ Bold for isotopes with half-lives longer than the age of the universe (nearly stable)
  2. ^ Abbreviations:
    ε: Electron capture
    IT: Isomeric transition
  3. ^ Bold for stable isotopes, bold italics for nearly stable isotopes (half-life longer than the age of the universe)
  4. ^ Believed to undergo α decay to 140Nd or β+β+ decay to 144Nd
  5. ^ 5.0 5.1 5.2 Primordial radioisotope
  6. ^ 6.0 6.1 6.2 6.3 6.4 6.5 Fission product
  7. ^ Used in Samarium-neodymium dating
  8. ^ 8.0 8.1 Neutron poison in reactors
  9. ^ Believed to undergo α decay to 145Nd with a half-life over 2×1015 years
  10. ^ Believed to undergo α decay to 146Nd
  11. ^ Believed to undergo α decay to 148Nd
  12. ^ Believed to undergo ββ decay to 154Gd with a half-life over 2.3×1018 years

参考文獻[编辑]