鉕的同位素

**主要的鉕同位素**
←Nd（60）	Sm（62）→
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钷没有稳定同位素。

圖表编辑

符號	Z（ p ）	N（ n ）	同位素質量（u）	半衰期	衰變方式^[1]^{[n 1]}	衰變產物^{[n 2]}	原子核自旋	相對豐度（莫耳分率）
符號	激發能量			半衰期	衰變方式^[1]^{[n 1]}	衰變產物^{[n 2]}	原子核自旋	相對豐度（莫耳分率）
¹²⁶Pm	61	65	125.95752(54)#	0.5# s
¹²⁷Pm	61	66	126.95163(64)#	1# s			5/2+#
¹²⁸Pm	61	67	127.94842(43)#	1.0(3) s	β⁺	¹²⁸Nd	6+#
¹²⁸Pm	61	67	127.94842(43)#	1.0(3) s	p	¹²⁷Nd	6+#
¹²⁹Pm	61	68	128.94316(43)#	3# s [>200 ns]	β⁺	¹²⁹Nd	5/2+#
¹³⁰Pm	61	69	129.94045(32)#	2.6(2) s	β⁺	¹³⁰Nd	(5+,6+,4+)
¹³⁰Pm	61	69	129.94045(32)#	2.6(2) s	β⁺, p （不常見）	¹²⁹Pr	(5+,6+,4+)
¹³¹Pm	61	70	130.93587(21)#	6.3(8) s	β⁺, p	¹³⁰Pr	5/2+#
¹³¹Pm	61	70	130.93587(21)#	6.3(8) s	β⁺	¹³¹Nd	5/2+#
¹³²Pm	61	71	131.93375(21)#	6.2(6) s	β⁺	¹³²Nd	(3+)
¹³²Pm	61	71	131.93375(21)#	6.2(6) s	β⁺, p (5×10⁻⁵%)	¹³¹Pr	(3+)
¹³³Pm	61	72	132.92978(5)	15(3) s	β⁺	¹³³Nd	(3/2+)
^133mPm	130.4(10) keV			10# s	β⁺	¹³³Nd	(11/2-)
^133mPm	130.4(10) keV			10# s	IT	¹³³Pm	(11/2-)
¹³⁴Pm	61	73	133.92835(6)	22(1) s	β⁺	¹³⁴Nd	(5+)
^134mPm	0(100)# keV			~5 s	IT	¹³⁴Pm	(2+)
¹³⁵Pm	61	74	134.92488(6)	49(3) s	β⁺	¹³⁵Nd	(5/2+,3/2+)
^135mPm	50(100)# keV			40(3) s	β⁺	¹³⁵Nd	(11/2-)
¹³⁶Pm	61	75	135.92357(8)	107(6) s	β⁺	¹³⁶Nd	(5-)
^136mPm	130(120) keV			47(2) s	β⁺	¹³⁶Nd	(2+)
¹³⁷Pm	61	76	136.920479(14)	2# min	β⁺	¹³⁷Nd	5/2+#
^137mPm	150(50) keV			2.4(1) min	β⁺	¹³⁷Nd	11/2-
¹³⁸Pm	61	77	137.919548(30)	10(2) s	β⁺	¹³⁸Nd	1+#
^138mPm	30(30) keV			3.24(5) min	β⁺	¹³⁸Nd	5-#
¹³⁹Pm	61	78	138.916804(14)	4.15(5) min	β⁺	¹³⁹Nd	(5/2)+
^139mPm	188.7(3) keV			180(20) ms	IT (99.83%)	¹³⁹Pm	(11/2)-
^139mPm	188.7(3) keV			180(20) ms	β⁺ (.17%)	¹³⁹Nd	(11/2)-
¹⁴⁰Pm	61	79	139.91604(4)	9.2(2) s	β⁺	¹⁴⁰Nd	1+
^140mPm	420(40) keV			5.95(5) min	β⁺	¹⁴⁰Nd	8-
¹⁴¹Pm	61	80	140.913555(15)	20.90(5) min	β⁺	¹⁴¹Nd	5/2+
^141m1Pm	628.40(10) keV			630(20) ns			11/2-
^141m2Pm	2530.9(5) keV			>2 µs
¹⁴²Pm	61	81	141.912874(27)	40.5(5) s	β⁺	¹⁴²Nd	1+
^142mPm	883.17(16) keV			2.0(2) ms	IT	¹⁴²Pm	(8)-
¹⁴³Pm	61	82	142.910933(4)	265(7) d	β⁺	¹⁴³Nd	5/2+
¹⁴⁴Pm	61	83	143.912591(3)	363(14) d	β⁺	¹⁴⁴Nd	5-
^144m1Pm	840.90(5) keV			780(200) ns			(9)+
^144m2Pm	8595.8(22) keV			~2.7 µs			(27+)
¹⁴⁵Pm	61	84	144.912749(3)	17.7(4) a	ε	¹⁴⁵Nd	5/2+
¹⁴⁵Pm	61	84	144.912749(3)	17.7(4) a	α (2.8×10⁻⁷%)	¹⁴¹Pr	5/2+
¹⁴⁶Pm	61	85	145.914696(5)	5.53(5) a	ε (66%)	¹⁴⁶Nd	3-
¹⁴⁶Pm	61	85	145.914696(5)	5.53(5) a	β⁻ (34%)	¹⁴⁶Sm	3-
¹⁴⁷Pm^{[n 3]}	61	86	146.9151385(26)	2.6234(2) a	β⁻	¹⁴⁷Sm	7/2+	痕量^{[n 4]}
¹⁴⁸Pm	61	87	147.917475(7)	5.368(2) d	β⁻	¹⁴⁸Sm	1-
^148mPm	137.9(3) keV			41.29(11) d	β⁻ (95%)	¹⁴⁸Sm	5-,6-
^148mPm	137.9(3) keV			41.29(11) d	IT (5%)	¹⁴⁸Pm	5-,6-
¹⁴⁹Pm^{[n 3]}	61	88	148.918334(4)	53.08(5) h	β⁻	¹⁴⁹Sm	7/2+
^149mPm	240.214(7) keV			35(3) µs			11/2-
¹⁵⁰Pm	61	89	149.920984(22)	2.68(2) h	β⁻	¹⁵⁰Sm	(1-)
¹⁵¹Pm^{[n 3]}	61	90	150.921207(6)	28.40(4) h	β⁻	¹⁵¹Sm	5/2+
¹⁵²Pm	61	91	151.923497(28)	4.12(8) min	β⁻	¹⁵²Sm	1+
^152m1Pm	140(90) keV			7.52(8) min			4-
^152m2Pm	250(150)# keV			13.8(2) min			(8)
¹⁵³Pm	61	92	152.924117(12)	5.25(2) min	β⁻	¹⁵³Sm	5/2-
¹⁵⁴Pm	61	93	153.92646(5)	1.73(10) min	β⁻	¹⁵⁴Sm	(0,1)
^154mPm	120(120) keV			2.68(7) min	β⁻	¹⁵⁴Sm	(3,4)
¹⁵⁵Pm	61	94	154.92810(3)	41.5(2) s	β⁻	¹⁵⁵Sm	(5/2-)
¹⁵⁶Pm	61	95	155.93106(4)	26.70(10) s	β⁻	¹⁵⁶Sm	4-
¹⁵⁷Pm	61	96	156.93304(12)	10.56(10) s	β⁻	¹⁵⁷Sm	(5/2-)
¹⁵⁸Pm	61	97	157.93656(14)	4.8(5) s	β⁻	¹⁵⁸Sm
¹⁵⁹Pm	61	98	158.93897(21)#	7000164800000000000♠1.648+0.43 −0.42 s^[2]	β⁻	¹⁵⁹Sm	5/2−#
¹⁶⁰Pm	61	99	159.94299(32)#	6999874000000000000♠874+16 −12 ms^[2]	β⁻	¹⁶⁰Sm
¹⁶¹Pm	61	100	160.94586(54)#	6999724000000000000♠724+20 −12 ms^[2]	β⁻ (98.91%)	¹⁶¹Sm	5/2−#
¹⁶¹Pm	61	100	160.94586(54)#	6999724000000000000♠724+20 −12 ms^[2]	β⁻, n (1.09%)	¹⁶⁰Sm	5/2−#
¹⁶²Pm	61	101	161.95029(75)#	6999467000000000000♠467+38 −18 ms^[2]	β⁻ (98.21%)	¹⁶²Sm
¹⁶²Pm	61	101	161.95029(75)#	6999467000000000000♠467+38 −18 ms^[2]	β⁻, n (1.79%)	¹⁶¹Sm
¹⁶³Pm	61	102	162.95368(86)#	6999362000000000000♠362+42 −30 ms^[2]	β⁻ (95%)	¹⁶³Sm	5/2−#
¹⁶³Pm	61	102	162.95368(86)#	6999362000000000000♠362+42 −30 ms^[2]	β⁻, n (1.79%)	¹⁶²Sm	5/2−#
¹⁶⁴Pm	61	103		6999280000000000000♠280+38 −33 ms^[2]	β⁻ (93.82%)	¹⁶⁴Sm
¹⁶⁴Pm	61	103		6999280000000000000♠280+38 −33 ms^[2]	β⁻, n (6.18%)	¹⁶³Sm
¹⁶⁵Pm	61	104		6999297000000000000♠297+111 −101 ms^[2]	β⁻ (86.74%)	¹⁶⁵Sm
¹⁶⁵Pm	61	104		6999297000000000000♠297+111 −101 ms^[2]	β⁻, n (13.26%)	¹⁶⁴Sm
¹⁶⁶Pm	61	105		6999228000000000000♠228+131 −112 ms^[2]	β⁻	¹⁶⁶Sm
¹⁶⁶Pm	61	105		6999228000000000000♠228+131 −112 ms^[2]	β⁻, n	¹⁶⁵Sm

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	→
釹的同位素	钷的同位素	釤的同位素

註釋编辑

^ 縮寫的涵義：
ε：电子俘获
 IT：核異構轉變
 β⁺：正电子发射
 β⁻：貝他衰變
^ 稳定同位素以粗体显示，半衰期超过宇宙年龄的同位素以粗斜体显示
^ ^3.0 ^3.1 ^3.2 裂变产物
^ 裂变产物，也是¹⁵¹Eu的衰变产物

参考文獻编辑

^ Universal Nuclide Chart . nucleonica. [2015-09-20]. （原始内容存档于2017-02-19）.
^ ^2.0 ^2.1 ^2.2 ^2.3 ^2.4 ^2.5 ^2.6 ^2.7 Kiss, G. G.; Vitéz-Sveiczer, A.; Saito, Y.; et al. Measuring the β-decay properties of neutron-rich exotic Pm, Sm, Eu, and Gd isotopes to constrain the nucleosynthesis yields in the rare-earth region. The Astrophysical Journal. 2022, 936 (107): 107. Bibcode:2022ApJ...936..107K. doi:10.3847/1538-4357/ac80fc  .

Isotope masses from Ame2003 Atomic Mass Evaluation by G. Audi, A.H. Wapstra, C. Thibault, J. Blachot and O. Bersillon in Nuclear Physics A729 (2003).
Half-life, spin, and isomer data selected from these sources. Editing notes on this article's talk page.
- Audi, Bersillon, Blachot, Wapstra. The Nubase2003 evaluation of nuclear and decay properties （页面存档备份，存于互联网档案馆）, Nuc. Phys. A 729, pp. 3-128 (2003).
- National Nuclear Data Center, Brookhaven National Laboratory. Information extracted from the NuDat 2.1 database （页面存档备份，存于互联网档案馆） (retrieved Sept. 2005).
- David R. Lide (ed.), Norman E. Holden in CRC Handbook of Chemistry and Physics, 85th Edition, online version. CRC Press. Boca Raton, Florida (2005). Section 11, Table of the Isotopes.

[2] 縮寫的涵義：
ε：电子俘获
IT：核異構轉變
β⁺：正电子发射
β⁻：貝他衰變

[3] 稳定同位素以粗体显示，半衰期超过宇宙年龄的同位素以粗斜体显示

[FP-4] 3.0 ^3.1 ^3.2 裂变产物

[5] 裂变产物，也是¹⁵¹Eu的衰变产物

[iso_data-1] Universal Nuclide Chart . nucleonica. [2015-09-20]. （原始内容存档于2017-02-19）.

[Ln922-6] 2.0 ^2.1 ^2.2 ^2.3 ^2.4 ^2.5 ^2.6 ^2.7 Kiss, G. G.; Vitéz-Sveiczer, A.; Saito, Y.; et al. Measuring the β-decay properties of neutron-rich exotic Pm, Sm, Eu, and Gd isotopes to constrain the nucleosynthesis yields in the rare-earth region. The Astrophysical Journal. 2022, 936 (107): 107. Bibcode:2022ApJ...936..107K. doi:10.3847/1538-4357/ac80fc  .

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