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鉻的同位素
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標準原子質量 (Ar, 標準) |
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鉻(原子質量單位:50.9415(1))共有28個同位素,其中有3個是穩定的。
圖表
符號 | Z( p ) |
N( n ) |
同位素質量(u) | 半衰期 |
衰變 方式 |
衰變 產物 |
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 | |||||||||
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) | 觀測上穩定 | 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) | 穩定 | 3/2− | 0.09501(17) | 0.09501–0.09553 | ||
54Cr | 24 | 30 | 53.9388804(8) | 穩定 | 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−# |
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 | → |
釩的同位素 | 鉻的同位素 | 錳的同位素 |
註釋
参考文獻
- 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.