鈣嘅同位素

鈣有24個同位素，其中3個係穩定嘅。

圖表

符號	Z（p）	N（n）	質量（u）	半衰期	原子核自旋	相對豐度	相對豐度嘅變化率
34Ca	20	14	34.01412(32)#	<35 ns	0+
35Ca	20	15	35.00494(21)#	25.7(2) ms	1/2+#
36Ca	20	16	35.99309(4)	102(2) ms	0+
37Ca	20	17	36.985870(24)	181.1(10) ms	(3/2+)
38Ca	20	18	37.976318(5)	440(8) ms	0+
39Ca	20	19	38.9707197(20)	859.6(14) ms	3/2+
40Ca	20	20	39.96259098(22)	穩定 [>5.9×1021 a]	0+	0.96941(156)	0.96933-0.96947
41Ca	20	21	40.96227806(26)	1.02(7)×105 a	7/2-
42Ca	20	22	41.95861801(27)	穩定	0+	0.00647(23)	0.00646-0.00648
43Ca	20	23	42.9587666(3)	穩定	7/2-	0.00135(10)	0.00135-0.00135
44Ca	20	24	43.9554818(4)	穩定	0+	0.02086(110)	0.02082-0.02092
45Ca	20	25	44.9561866(4)	162.67(25) d	7/2-
46Ca	20	26	45.9536926(24)	穩定 [>100×1015 a]	0+	0.00004(3)	0.00004-0.00004
47Ca	20	27	46.9545460(24)	4.536(3) d	7/2-
48Ca	20	28	47.952534(4)	4.3(38)×1021 a	0+	0.00187(21)	0.00186-0.00188
49Ca	20	29	48.955674(4)	8.718(6) min	3/2-
50Ca	20	30	49.957519(10)	13.9(6) s	0+
51Ca	20	31	50.9615(1)	10.0(8) s	(3/2-)#
52Ca	20	32	51.96510(75)	4.6(3) s	0+
53Ca	20	33	52.97005(54)#	90(15) ms	3/2-#
54Ca	20	34	53.97435(75)#	50# ms [>300 ns]	0+
55Ca	20	35	54.98055(75)#	30# ms [>300 ns]	5/2-#
56Ca	20	36	55.98557(97)#	10# ms [>300 ns]	0+
57Ca	20	37	56.99236(107)#	5# ms	5/2-#

備註：有#嘅數據代表冇經過實驗嘅證明，只係理論推測，而用咗括號括係代表數據唔確定。

參攷

• 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). Pure Appl. Chem. Vol. 75, No. 6, pp. 683-800, (2003) and Atomic Weights Revised (2005).
• 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, Nuc. Phys. A 729, pp. 3-128 (2003).
  • National Nuclear Data Center, Brookhaven National Laboratory. Information extracted from the NuDat 2.1 database (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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