鉀嘅同位素

鉀有28個同位素，其中兩個係穩定嘅。

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
符號	激發能量			半衰期	原子核自旋	相對豐度	相對豐度嘅變化率
³²K	19	13	32.02192(54)#		1+#
^32mK	950(100)# keV			?	4+#
³³K	19	14	33.00726(21)#	<25 ns	(3/2+)#
³⁴K	19	15	33.99841(32)#	<40 ns	1+#
³⁵K	19	16	34.988010(21)	178(8) ms	3/2+
³⁶K	19	17	35.981292(8)	342(2) ms	2+
³⁷K	19	18	36.97337589(10)	1.226(7) s	3/2+
³⁸K	19	19	37.9690812(5)	7.636(18) min	3+
^38m1K	130.50(28) keV			924.2(3) ms	0+
^38m2K	3458.0(2) keV			21.98(11) µs	(7+),(5+)
³⁹K	19	20	38.96370668(20)	穩定	3/2+	0.932581(44)
⁴⁰K	19	21	39.96399848(21)	1.248(3)E+9 a	4-	0.000117(1)
^40mK	1643.639(11) keV			336(12) ns	0+
⁴¹K	19	22	40.96182576(21)	穩定	3/2+	0.067302(44)
⁴²K	19	23	41.96240281(24)	12.360(12) h	2-
⁴³K	19	24	42.960716(10)	22.3(1) h	3/2+
⁴⁴K	19	25	43.96156(4)	22.13(19) min	2-
⁴⁵K	19	26	44.960699(11)	17.3(6) min	3/2+
⁴⁶K	19	27	45.961977(17)	105(10) s	2(-)
⁴⁷K	19	28	46.961678(9)	17.50(24) s	1/2+
⁴⁸K	19	29	47.965514(26)	6.8(2) s	(2-)
⁴⁹K	19	30	48.96745(8)	1.26(5) s	(3/2+)
⁵⁰K	19	31	49.97278(30)	472(4) ms	(0-,1,2-)
⁵¹K	19	32	50.97638(54)#	365(5) ms	3/2+#
⁵²K	19	33	51.98261(75)#	105(5) ms	(2-)#
⁵³K	19	34	52.98712(75)#	30(5) ms	(3/2+)#
⁵⁴K	19	35	53.99420(97)#	10(5) ms	2-#
⁵⁵K	19	36	54.99971(107)#	3# ms	3/2+#

備註：畫上#號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。

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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