鍶的同位素

鍶（Sr，原子量：87.62(1)）共有39個同位素，其中有4個同位素是稳定的。

圖表

符號	Z（ p ）	N（ n ）	同位素質量（u）	半衰期	衰變方式^[1]^{[n 1]}	衰變產物^{[n 2]}	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）
符號	激發能量			半衰期	衰變方式^[1]^{[n 1]}	衰變產物^{[n 2]}	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）
73 Sr	38	35	72.96597(64)#	>25 ms	β⁺ (>99.9%)	⁷³Rb	1/2-#
73 Sr	38	35	72.96597(64)#	>25 ms	β⁺, p (<.1%)	⁷²Kr	1/2-#
⁷⁴Sr	38	36	73.95631(54)#	50# ms [>1.5 µs]	β⁺	⁷⁴Rb	0+
⁷⁵Sr	38	37	74.94995(24)	88(3) ms	β⁺ (93.5%)	⁷⁵Rb	(3/2-)
⁷⁵Sr	38	37	74.94995(24)	88(3) ms	β⁺, p (6.5%)	⁷⁴Kr	(3/2-)
⁷⁶Sr	38	38	75.94177(4)	7.89(7) s	β⁺	⁷⁶Rb	0+
⁷⁷Sr	38	39	76.937945(10)	9.0(2) s	β⁺ (99.75%)	⁷⁷Rb	5/2+
⁷⁷Sr	38	39	76.937945(10)	9.0(2) s	β⁺, p (.25%)	⁷⁶Kr	5/2+
⁷⁸Sr	38	40	77.932180(8)	159(8) s	β⁺	⁷⁸Rb	0+
⁷⁹Sr	38	41	78.929708(9)	2.25(10) min	β⁺	⁷⁹Rb	3/2(-)
⁸⁰Sr	38	42	79.924521(7)	106.3(15) min	β⁺	⁸⁰Rb	0+
⁸¹Sr	38	43	80.923212(7)	22.3(4) min	β⁺	⁸¹Rb	1/2-
⁸²Sr	38	44	81.918402(6)	25.36(3) d	ε	⁸²Rb	0+
⁸³Sr	38	45	82.917557(11)	32.41(3) h	β⁺	⁸³Rb	7/2+
^83mSr	259.15(9) keV			4.95(12) s	IT	⁸³Sr	1/2-
⁸⁴Sr	38	46	83.913425(3)	觀測上穩定^{[n 3]}			0+	0.0056(1)	0.0055-0.0058
⁸⁵Sr	38	47	84.912933(3)	64.853(8) d	ε	⁸⁵Rb	9/2+
^85mSr	238.66(6) keV			67.63(4) min	IT (86.6%)	⁸⁵Sr	1/2-
^85mSr	238.66(6) keV			67.63(4) min	β⁺ (13.4%)	⁸⁵Rb	1/2-
⁸⁶Sr	38	48	85.9092607309(91)	稳定			0+	0.0986(1)	0.0975-0.0999
^86mSr	2955.68(21) keV			455(7) ns			8+
⁸⁷Sr^{[n 4]}	38	49	86.9088774970(91)	稳定			9/2+	0.0700(1)	0.0694-0.0714
^87mSr	388.533(3) keV			2.815(12) h	IT (99.7%)	⁸⁷Sr	1/2-
^87mSr	388.533(3) keV			2.815(12) h	ε (.3%)	⁸⁷Rb	1/2-
88 Sr ^{[n 5]}	38	50	87.9056122571(97)	稳定			0+	0.8258(1)	0.8229-0.8275
⁸⁹Sr^{[n 5]}	38	51	88.9074507(12)	50.57(3) d	β⁻	⁸⁹Y	5/2+
90 Sr ^{[n 5]}	38	52	89.907738(3)	28.90(3) y	β⁻	⁹⁰Y	0+
⁹¹Sr	38	53	90.910203(5)	9.63(5) h	β⁻	⁹¹Y	5/2+
⁹²Sr	38	54	91.911038(4)	2.66(4) h	β⁻	⁹²Y	0+
⁹³Sr	38	55	92.914026(8)	7.423(24) min	β⁻	⁹³Y	5/2+
⁹⁴Sr	38	56	93.915361(8)	75.3(2) s	β⁻	⁹⁴Y	0+
⁹⁵Sr	38	57	94.919359(8)	23.90(14) s	β⁻	⁹⁵Y	1/2+
⁹⁶Sr	38	58	95.921697(29)	1.07(1) s	β⁻	⁹⁶Y	0+
⁹⁷Sr	38	59	96.926153(21)	429(5) ms	β⁻ (99.95%)	⁹⁷Y	1/2+
⁹⁷Sr	38	59	96.926153(21)	429(5) ms	β⁻, n (.05%)	⁹⁶Y	1/2+
^97m1Sr	308.13(11) keV			170(10) ns			(7/2)+
^97m2Sr	830.8(2) keV			255(10) ns			(11/2-)#
⁹⁸Sr	38	60	97.928453(28)	0.653(2) s	β⁻ (99.75%)	⁹⁸Y	0+
⁹⁸Sr	38	60	97.928453(28)	0.653(2) s	β⁻, n (.25%)	⁹⁷Y	0+
⁹⁹Sr	38	61	98.93324(9)	0.269(1) s	β⁻ (99.9%)	⁹⁹Y	3/2+
⁹⁹Sr	38	61	98.93324(9)	0.269(1) s	β⁻, n (.1%)	⁹⁸Y	3/2+
¹⁰⁰Sr	38	62	99.93535(14)	202(3) ms	β⁻ (99.02%)	¹⁰⁰Y	0+
¹⁰⁰Sr	38	62	99.93535(14)	202(3) ms	β⁻, n (.98%)	⁹⁹Y	0+
¹⁰¹Sr	38	63	100.94052(13)	118(3) ms	β⁻ (97.63%)	¹⁰¹Y	(5/2-)
¹⁰¹Sr	38	63	100.94052(13)	118(3) ms	β⁻, n (2.37%)	¹⁰⁰Y	(5/2-)
¹⁰²Sr	38	64	101.94302(12)	69(6) ms	β⁻ (94.5%)	¹⁰²Y	0+
¹⁰²Sr	38	64	101.94302(12)	69(6) ms	β⁻, n (5.5%)	¹⁰¹Y	0+
¹⁰³Sr	38	65	102.94895(54)#	50# ms [>300 ns]	β⁻	¹⁰³Y
¹⁰⁴Sr	38	66	103.95233(75)#	30# ms [>300 ns]	β⁻	¹⁰⁴Y	0+
¹⁰⁵Sr	38	67	104.95858(75)#	20# ms [>300 ns]

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	→
銣的同位素	鍶的同位素	釔的同位素

註釋

^ Abbreviations:
ε: Electron capture
IT: Isomeric transition
^ Bold for stable isotopes, bold italic for nearly-stable isotopes (half-life longer than the age of the universe)
^ Believed to decay by β⁺β⁺ to ⁸⁴Kr
^ Used in rubidium-strontium dating
^ ^5.0 ^5.1 ^5.2 Fission product

参考文獻

^ http://www.nucleonica.net/unc.aspx

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.

[2] Abbreviations:
ε: Electron capture
IT: Isomeric transition

[3] Bold for stable isotopes, bold italic for nearly-stable isotopes (half-life longer than the age of the universe)

[4] Believed to decay by β⁺β⁺ to ⁸⁴Kr

[5] Used in rubidium-strontium dating

[FP-6] 5.0 ^5.1 ^5.2 Fission product

[1] ttp://www.nucleonica.net/unc.aspx

[1]

[n 1]

[n 2]

[n 3]

[n 4]

[n 5]