铬的同位素
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| 标准原子质量 (Ar, 标准) |
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铬（原子质量单位：50.9415(1)）共有28个同位素，其中有4个是稳定的。
图表
[编辑]| 符号 | Z | N | 同位素质量（u） [n 1][n 2] |
半衰期 [n 1][n 2] |
衰变 方式[2] |
衰变 产物 [n 3] |
原子核 自旋[n 1] |
相对丰度 （莫耳分率）[n 2] |
相对丰度 的变化量 （莫耳分率） |
|---|---|---|---|---|---|---|---|---|---|
| 激发能量[n 1][n 2] | |||||||||
| 42Cr | 24 | 18 | 42.00643(32)# | 14(3) ms [13(+4-2) ms] |
β+ (>99.9%) | 42V | 0+ | ||
| 2p (<.1%) | 40Ti | ||||||||
| 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+ | ||
| β+, p (7%) | 43Ti | ||||||||
| 45Cr | 24 | 21 | 44.97964(54) | 50(6) ms | β+ (73%) | 45V | 7/2−# | ||
| β+, p (27%) | 44Ti | ||||||||
| 45mCr | 50(100)# keV | 1# ms | IT | 45Cr | 3/2+# | ||||
| β+ | 45V | ||||||||
| 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 4] | 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−# | ||
| β−, n (<.1%) | 60Mn | ||||||||
| 62Cr | 24 | 38 | 61.95661(36) | 199(9) ms | β− (>99.9%) | 62Mn | 0+ | ||
| β−, n | 61Mn | ||||||||
| 63Cr | 24 | 39 | 62.96186(32)# | 129(2) ms | β− | 63Mn | (1/2−)# | ||
| β−, n | 62Mn | ||||||||
| 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 5] | 68Mn | 0+ | ||
| β−, n?[n 5] | 67Mn | ||||||||
| β−, 2n?[n 5] | 66Mn | ||||||||
| 69Cr[4] | 24 | 45 | 68.98966(54)# | 6# ms (>620 ns) |
β−?[n 5] | 69Mn | 7/2+# | ||
| β−, n?[n 5] | 68Mn | ||||||||
| β−, 2n?[n 5] | 67Mn | ||||||||
| 70Cr[4] | 24 | 46 | 69.99395(64)# | 6# ms (>620 ns) |
β−?[n 5] | 70Mn | 0+ | ||
| β−, n?[n 5] | 69Mn | ||||||||
| β−, 2n?[n 5] | 68Mn | ||||||||
- ^ 1.0 1.1 1.2 1.3 画上#号的数据代表没有经过实验的证明，仅为理论推测。
- ^ 2.0 2.1 2.2 2.3 用括号括起来的数据代表不确定性。
- ^ 稳定的衰变产物以粗体表示。
- ^ 理论上可以双电子捕获成50Ti，半衰期超过1.3×1018年
- ^ 5.0 5.1 5.2 5.3 5.4 5.5 5.6 5.7 5.8 理论上可以发生，但仍未被观测到
| ← | 同位素列表 | → |
| 钒的同位素 | 铬的同位素 | 锰的同位素 |
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.