鈣的同位素
鈣（原子量：40.078(4)）共有24個同位素，其中有5個是穩定的。
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| 標準原子質量 (Ar, 標準) |
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圖表
| 符號 | Z（ p ） |
N（ n ） |
同位素質量（u） | 半衰期[n 1] | 衰變 方式[2][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） |
|---|---|---|---|---|---|---|---|---|---|
| 34 Ca |
20 | 14 | 34.01412(32)# | <35 ns | p | 33K | 0+ | ||
| 35 Ca |
20 | 15 | 35.00494(21)# | 25.7(2) ms | β+ (>99.9%) | 35K | 1/2+# | ||
| β+, p (<.1%) | 34Ar | ||||||||
| 36 Ca |
20 | 16 | 35.99309(4) | 102(2) ms | β+, p (56.8%) | 35Ar | 0+ | ||
| β+ (43.2%) | 36K | ||||||||
| 37 Ca |
20 | 17 | 36.985870(24) | 181.1(10) ms | β+, p (74.5%) | 36Ar | (3/2+) | ||
| β+ (25.5%) | 37K | ||||||||
| 38 Ca |
20 | 18 | 37.976318(5) | 440(8) ms | β+ | 38K | 0+ | ||
| 39 Ca |
20 | 19 | 38.9707197(20) | 859.6(14) ms | β+ | 39K | 3/2+ | ||
| 40 Ca [n 4] |
20 | 20 | 39.96259098(22) | 觀測上穩定[n 5] | 0+ | 0.96941(156) | 0.96933–0.96947 | ||
| 41 Ca |
20 | 21 | 40.96227806(26) | 1.02(7)×105 y | ε | 41K | 7/2− | 痕量[n 6] | |
| 42 Ca |
20 | 22 | 41.95861801(27) | 穩定 | 0+ | 0.00647(23) | 0.00646–0.00648 | ||
| 43 Ca |
20 | 23 | 42.9587666(3) | 穩定 | 7/2− | 0.00135(10) | 0.00135–0.00135 | ||
| 44 Ca |
20 | 24 | 43.9554818(4) | 穩定 | 0+ | 0.02086(110) | 0.02082–0.02092 | ||
| 45 Ca |
20 | 25 | 44.9561866(4) | 162.67(25) d | β− | 45Sc | 7/2− | ||
| 46 Ca |
20 | 26 | 45.9536926(24) | 觀測上穩定[n 7] | 0+ | 4(3)×10−5 | 4×10−5–4×10−5 | ||
| 47 Ca |
20 | 27 | 46.9545460(24) | 4.536(3) d | β− | 47Sc | 7/2− | ||
| 48 Ca [n 8] |
20 | 28 | 47.952534(4) | 43(38)×1018 y | β−β−[n 9] | 48Ti | 0+ | 0.00187(21) | 0.00186–0.00188 |
| 49 Ca |
20 | 29 | 48.955674(4) | 8.718(6) min | β− | 49Sc | 3/2− | ||
| 50 Ca |
20 | 30 | 49.957519(10) | 13.9(6) s | β− | 50Sc | 0+ | ||
| 51 Ca |
20 | 31 | 50.9615(1) | 10.0(8) s | β− (>99.9%) | 51Sc | (3/2−)# | ||
| β−, n (<.1%) | 50Sc | ||||||||
| 52 Ca |
20 | 32 | 51.96510(75) | 4.6(3) s | β− (98%) | 52Sc | 0+ | ||
| β−, n (2%) | 51Sc | ||||||||
| 53 Ca |
20 | 33 | 52.97005(54)# | 90(15) ms | β− (70%) | 53Sc | 3/2−# | ||
| β−, n (30%) | 52Sc | ||||||||
| 54 Ca |
20 | 34 | 53.97435(75)# | 50# ms [>300 ns] | β−, n | 53Sc | 0+ | ||
| β− | 54Sc | ||||||||
| 55 Ca |
20 | 35 | 54.98055(75)# | 30# ms [>300 ns] | β− | 55Sc | 5/2−# | ||
| 56 Ca |
20 | 36 | 55.98557(97)# | 10# ms [>300 ns] | β− | 56Sc | 0+ | ||
| 57 Ca |
20 | 37 | 56.99236(107)# | 5# ms | β− | 57Sc | 5/2−# | ||
| β−, n | 56Sc | ||||||||
| 58 Ca |
20 | 38 | (57.962133)# | (0+)# | |||||
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 | → |
| 鉀的同位素 | 鈣的同位素 | 鈧的同位素 |
註釋
参考文獻
- Meija, Juris; et al. . Pure and Applied Chemistry. 2016, 88 (3): 265–91. doi:10.1515/pac-2015-0305.
-
. nucleonica. [2015-09-11]. （原始内容存档于2017-02-19）.
- 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）. Pure Appl. Chem. Vol. 75, No. 6, pp. 683-800, (2003) and Atomic Weights Revised (2005) （页面存档备份，存于）.
- 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）, 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） (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.
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