铬的同位素

**主要的铬同位素**
标准原子质量（英语：Standard atomic weight） (Ar, 标准)	51.9961(6);
←V（23）	Mn（25）→
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铬（原子质量单位：50.9415(1)）共有28个同位素，其中有3个是稳定的。

图表[编辑]

符号	Z（ p ）	N（ n ）	同位素质量（u）	半衰期	衰变方式^[2]	衰变产物^{[n 1]}	原子核自旋	相对丰度（莫耳分率）	相对丰度的变化量（莫耳分率）
符号	激发能量			半衰期	衰变方式^[2]	衰变产物^{[n 1]}	原子核自旋	相对丰度（莫耳分率）	相对丰度的变化量（莫耳分率）
⁴²Cr	24	18	42.00643(32)#	14(3) ms [13(+4-2) ms]	β⁺ (>99.9%)	⁴²V	0+
⁴²Cr	24	18	42.00643(32)#	14(3) ms [13(+4-2) ms]	2p (<.1%)	⁴⁰Ti	0+
⁴³Cr	24	19	42.99771(24)#	21.6(7) ms	β⁺ (71%)	⁴³V	(3/2+)
					β⁺, p (23%)	⁴²Ti
					β⁺, 2p (6%)	⁴¹Sc
					β⁺, α (<.1%)	³⁹Sc
⁴⁴Cr	24	20	43.98555(5)#	54(4) ms [53(+4-3) ms]	β⁺ (93%)	⁴⁴V	0+
⁴⁴Cr	24	20	43.98555(5)#	54(4) ms [53(+4-3) ms]	β⁺, p (7%)	⁴³Ti	0+
⁴⁵Cr	24	21	44.97964(54)	50(6) ms	β⁺ (73%)	⁴⁵V	7/2−#
⁴⁵Cr	24	21	44.97964(54)	50(6) ms	β⁺, p (27%)	⁴⁴Ti	7/2−#
^45mCr	50(100)# keV			1# ms	IT	⁴⁵Cr	3/2+#
^45mCr	50(100)# keV			1# ms	β⁺	⁴⁵V	3/2+#
⁴⁶Cr	24	22	45.968359(21)	0.26(6) s	β⁺	⁴⁶V	0+
⁴⁷Cr	24	23	46.962900(15)	500(15) ms	β⁺	⁴⁷V	3/2−
⁴⁸Cr	24	24	47.954032(8)	21.56(3) h	β⁺	⁴⁸V	0+
⁴⁹Cr	24	25	48.9513357(26)	42.3(1) min	β⁺	⁴⁹V	5/2−
⁵⁰Cr	24	26	49.9460442(11)	观测上稳定^{[n 2]}			0+	0.04345(13)	0.04294–0.04345
⁵¹Cr	24	27	50.9447674(11)	27.7025(24) d	ε	⁵¹V	7/2−
52 Cr	24	28	51.9405075(8)	稳定			0+	0.83789(18)	0.83762–0.83790
⁵³Cr	24	29	52.9406494(8)	稳定			3/2−	0.09501(17)	0.09501–0.09553
⁵⁴Cr	24	30	53.9388804(8)	稳定			0+	0.02365(7)	0.02365–0.02391
⁵⁵Cr	24	31	54.9408397(8)	3.497(3) min	β⁻	⁵⁵Mn	3/2−
⁵⁶Cr	24	32	55.9406531(20)	5.94(10) min	β⁻	⁵⁶Mn	0+
⁵⁷Cr	24	33	56.943613(2)	21.1(10) s	β⁻	⁵⁷Mn	(3/2−)
⁵⁸Cr	24	34	57.94435(22)	7.0(3) s	β⁻	⁵⁸Mn	0+
⁵⁹Cr	24	35	58.94859(26)	460(50) ms	β⁻	⁵⁹Mn	5/2−#
^59mCr	503.0(17) keV			96(20) µs			(9/2+)
⁶⁰Cr	24	36	59.95008(23)	560(60) ms	β⁻	⁶⁰Mn	0+
⁶¹Cr	24	37	60.95472(27)	261(15) ms	β⁻ (>99.9%)	⁶¹Mn	5/2−#
⁶¹Cr	24	37	60.95472(27)	261(15) ms	β⁻, n (<.1%)	⁶⁰Mn	5/2−#
⁶²Cr	24	38	61.95661(36)	199(9) ms	β⁻ (>99.9%)	⁶²Mn	0+
⁶²Cr	24	38	61.95661(36)	199(9) ms	β⁻, n	⁶¹Mn	0+
⁶³Cr	24	39	62.96186(32)#	129(2) ms	β⁻	⁶³Mn	(1/2−)#
⁶³Cr	24	39	62.96186(32)#	129(2) ms	β⁻, n	⁶²Mn	(1/2−)#
⁶⁴Cr	24	40	63.96441(43)#	43(1) ms	β⁻	⁶⁴Mn	0+
⁶⁵Cr	24	41	64.97016(54)#	27(3) ms	β⁻	⁶⁵Mn	(1/2−)#
⁶⁶Cr	24	42	65.97338(64)#	10(6) ms	β⁻	⁶⁶Mn	0+
⁶⁷Cr	24	43	66.97955(75)#	10# ms [>300 ns]	β⁻	⁶⁷Mn	1/2−#
⁶⁸Cr^[3]	24	44	67.98316(54)#	10# ms (>620 ns)	β⁻?^{[n 3]}	⁶⁸Mn	0+
					β⁻, n?^{[n 3]}	⁶⁷Mn
					β⁻, 2n?^{[n 3]}	⁶⁶Mn
⁶⁹Cr^[4]	24	45	68.98966(54)#	6# ms (>620 ns)	β⁻?^{[n 3]}	⁶⁹Mn	7/2+#
					β⁻, n?^{[n 3]}	⁶⁸Mn
					β⁻, 2n?^{[n 3]}	⁶⁷Mn
⁷⁰Cr^[4]	24	46	69.99395(64)#	6# ms (>620 ns)	β⁻?^{[n 3]}	⁷⁰Mn	0+
					β⁻, n?^{[n 3]}	⁶⁹Mn
					β⁻, 2n?^{[n 3]}	⁶⁸Mn

备注：画上#号的数据代表没有经过实验的证明，只是理论推测而已，而用括号括起来的代表数据不确定性。

←	同位素列表	→
钒的同位素	铬的同位素	锰的同位素

注释[编辑]

^ 稳定同位素以粗体显示
^ 理论上可以双电子捕获成⁵⁰Ti，半衰期超过1.3×10¹⁸年
^ ^3.0 ^3.1 ^3.2 ^3.3 ^3.4 ^3.5 ^3.6 ^3.7 ^3.8 理论上可以发生，但仍未被观测到

参考文献[编辑]

^ Meija, Juris; et al. Atomic weights of the elements 2013 (IUPAC Technical Report). Pure and Applied Chemistry. 2016, 88 (3): 265–91. doi:10.1515/pac-2015-0305.
^ Universal Nuclide Chart. nucleonica. [2015-09-12]. （原始内容存档于2017-02-19）.
^ Tarasov, O. B.; et al. Evidence for a Change in the Nuclear Mass Surface with the Discovery of the Most Neutron-Rich Nuclei with 17 ≤ Z ≤ 25. Physical Review Letters. April 2009, 102 (14): 142501 [3 January 2023]. PMID 19392430. S2CID 42329617. arXiv:0903.1975 . doi:10.1103/PhysRevLett.102.142501.
^ ^4.0 ^4.1 Tarasov, O. B.; et al. Production cross sections from 82 Se fragmentation as indications of shell effects in neutron-rich isotopes close to the drip-line. Physical Review C. May 2013, 87 (5): 054612. doi:10.1103/PhysRevC.87.054612 .

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).
Isotopic compositions and standard atomic masses from Atomic weights of the elements. Review 2000 (IUPAC Technical Report) （页面存档备份，存于互联网档案馆）. Pure Appl. Chem. Vol. 75, No. 6, pp. 683-800, (2003) and Atomic Weights Revised (2005) （页面存档备份，存于互联网档案馆）.
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.

[3] 稳定同位素以粗体显示

[4] 理论上可以双电子捕获成⁵⁰Ti，半衰期超过1.3×10¹⁸年

[decay_mode_1-6] 3.0 ^3.1 ^3.2 ^3.3 ^3.4 ^3.5 ^3.6 ^3.7 ^3.8 理论上可以发生，但仍未被观测到

[CIAAW2013-1] Meija, Juris; et al. Atomic weights of the elements 2013 (IUPAC Technical Report). Pure and Applied Chemistry. 2016, 88 (3): 265–91. doi:10.1515/pac-2015-0305.

[2] Universal Nuclide Chart. nucleonica. [2015-09-12]. （原始内容存档于2017-02-19）.

[5] Tarasov, O. B.; et al. Evidence for a Change in the Nuclear Mass Surface with the Discovery of the Most Neutron-Rich Nuclei with 17 ≤ Z ≤ 25. Physical Review Letters. April 2009, 102 (14): 142501 [3 January 2023]. PMID 19392430. S2CID 42329617. arXiv:0903.1975 . doi:10.1103/PhysRevLett.102.142501.

[Tarasov_1-7] 4.0 ^4.1 Tarasov, O. B.; et al. Production cross sections from 82 Se fragmentation as indications of shell effects in neutron-rich isotopes close to the drip-line. Physical Review C. May 2013, 87 (5): 054612. doi:10.1103/PhysRevC.87.054612 .

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