矽的同位素

**主要的矽同位素**
標準原子質量 (Ar, 標準)	[28.084, 28.086][1]; 傳統: 28.085;
←Al（13）	P（15）→

矽（原子量：28.0855(3)）共有23個同位素，其中有3個同位素是穩定的。

圖表

符號	Z（p ）	N（n ）	同位素質量（u）	半衰期	衰變方式[2]	衰變產物[n 1]	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）
²²Si	14	8	22.03453(22)#	29(2) ms	β⁺ (68%)	²²Al	0+
²²Si	14	8	22.03453(22)#	29(2) ms	β⁺, p (32%)	²¹Mg	0+
²³Si	14	9	23.02552(21)#	42.3(4) ms	β⁺	²³Al	3/2+#
²⁴Si	14	10	24.011546(21)	140(8) ms	β⁺ (92%)	²⁴Al	0+
²⁴Si	14	10	24.011546(21)	140(8) ms	β⁺, p (8%)	²³Mg	0+
²⁵Si	14	11	25.004106(11)	220(3) ms	β⁺ (63.19%)	²⁵Al	5/2+
²⁵Si	14	11	25.004106(11)	220(3) ms	β⁺, p (36.8%)	²⁴Mg	5/2+
²⁶Si	14	12	25.992330(3)	2.234(13) s	β⁺	²⁶Al	0+
²⁷Si	14	13	26.98670491(16)	4.16(2) s	β⁺	²⁷Al	5/2+
²⁸Si	14	14	27.9769265325(19)	稳定			0+	0.92223(19)	0.92205–0.92241
²⁹Si	14	15	28.976494700(22)	穩定			1/2+	0.04685(8)	0.04678–0.04692
³⁰Si	14	16	29.97377017(3)	穩定			0+	0.03092(11)	0.03082–0.03102
³¹Si	14	17	30.97536323(4)	157.3(3) min	β⁻	³¹P	3/2+
³²Si	14	18	31.97414808(5)	153(19) y	β⁻	³²P	0+	痕量或天然放射性	宇宙成因
³³Si	14	19	32.978000(17)	6.18(18) s	β⁻	³³P	(3/2+)
³⁴Si	14	20	33.978576(15)	2.77(20) s	β⁻	³⁴P	0+
³⁵Si	14	21	34.98458(4)	780(120) ms	β⁻ (94.74%)	³⁵P	7/2−#
³⁵Si	14	21	34.98458(4)	780(120) ms	β⁻, n (5.26%)	³⁴P	7/2−#
³⁶Si	14	22	35.98660(13)	0.45(6) s	β⁻ (88%)	³⁶P	0+
³⁶Si	14	22	35.98660(13)	0.45(6) s	β⁻, n (12%)	³⁵P	0+
³⁷Si	14	23	36.99294(18)	90(60) ms	β⁻ (83%)	³⁷P	(7/2−)#
³⁷Si	14	23	36.99294(18)	90(60) ms	β⁻, n (17%)	³⁶P	(7/2−)#
³⁸Si	14	24	37.99563(15)	90# ms [>1 µs]	β⁻, n	³⁷P	0+
³⁸Si	14	24	37.99563(15)	90# ms [>1 µs]	β⁻	³⁸P	0+
³⁹Si	14	25	39.00207(36)	47.5(20) ms	β⁻	³⁹P	7/2−#
⁴⁰Si	14	26	40.00587(60)	33.0(10) ms	β⁻	⁴⁰P	0+
⁴¹Si	14	27	41.01456(198)	20.0(25) ms	β⁻	⁴¹P	7/2−#
⁴²Si	14	28	42.01979(54)#	13(4) ms	β⁻	⁴²P	0+
⁴³Si	14	29	43.02866(75)#	15# ms [>260 ns]			3/2−#
⁴⁴Si	14	30	44.03526(86)#	10# ms			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	→
鋁的同位素	矽的同位素	磷的同位素

註釋

Bold for stable isotopes

參考文獻

Meija, Juris; 等. . Pure and Applied Chemistry. 2016, 88 (3): 265–91. doi:10.1515/pac-2015-0305.
. Nucleonica. [2014-12-02]. （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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[3] Bold for stable isotopes

[CIAAW2013-1] Meija, Juris; 等. . Pure and Applied Chemistry. 2016, 88 (3): 265–91. doi:10.1515/pac-2015-0305.

[2] . Nucleonica. [2014-12-02]. （原始内容存档于2017-02-19）. .