鈣的同位素

鈣 (原子質量單位:40.078(4) )共有24個同位素，其中有3個是穩定的。

圖表[编辑]

符號	Z(p)	N(n)	質量(原子質量單位)	半衰期	原子核自旋	相對豐度	相對豐度的變化率
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: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

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.