Isotopes of technetium

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Technetium (Tc) has no stable isotopes. A standard atomic mass cannot be given.

[edit] Table

nuclide symbol	Z(p)	N(n)	isotopic mass (u)	half-life	nuclear spin	representative isotopic composition (mole fraction)	range of natural variation (mole fraction)
nuclide symbol	excitation energy			half-life	nuclear spin	representative isotopic composition (mole fraction)	range of natural variation (mole fraction)
⁸⁵Tc	43	42	84.94883(43)#	<110 ns	1/2-#
⁸⁶Tc	43	43	85.94288(32)#	55(6) ms	(0+)
^86mTc	1500(150) keV			1.11(21) µs	(5+,5-)
⁸⁷Tc	43	44	86.93653(32)#	2.18(16) s	1/2-#
^87mTc	20(60)# keV			2# s	9/2+#
⁸⁸Tc	43	45	87.93268(22)#	5.8(2) s	(2,3)
^88mTc	0(300)# keV			6.4(8) s	(6,7,8)
⁸⁹Tc	43	46	88.92717(22)#	12.8(9) s	(9/2+)
^89mTc	62.6(5) keV			12.9(8) s	(1/2-)
⁹⁰Tc	43	47	89.92356(26)	8.7(2) s	1+
^90mTc	310(390) keV			49.2(4) s	(8+)
⁹¹Tc	43	48	90.91843(22)	3.14(2) min	(9/2)+
^91mTc	139.3(3) keV			3.3(1) min	(1/2)-
⁹²Tc	43	49	91.915260(28)	4.25(15) min	(8)+
^92mTc	270.15(11) keV			1.03(7) µs	(4+)
⁹³Tc	43	50	92.910249(4)	2.75(5) h	9/2+
^93m1Tc	391.84(8) keV			43.5(10) min	1/2-
^93m2Tc	2185.16(15) keV			10.2(3) µs	(17/2)-
⁹⁴Tc	43	51	93.909657(5)	293(1) min	7+
^94mTc	75.5(19) keV			52.0(10) min	(2)+
⁹⁵Tc	43	52	94.907657(6)	20.0(1) h	9/2+
^95mTc	38.89(5) keV			61(2) d	1/2-
⁹⁶Tc	43	53	95.907871(6)	4.28(7) d	7+
^96mTc	34.28(7) keV			51.5(10) min	4+
⁹⁷Tc	43	54	96.906365(5)	4.21(16)E+6 a	9/2+
^97mTc	96.56(6) keV			91.4(8) d	1/2-
⁹⁸Tc	43	55	97.907216(4)	4.2(3)E+6 a	(6)+
^98mTc	90.76(16) keV			14.7(3) µs	(2)-
⁹⁹Tc	43	56	98.9062547(21)	2.111(12)E+5 a	9/2+
^99mTc	142.6832(11) keV			6.0058(12) h	1/2-
¹⁰⁰Tc	43	57	99.9076578(24)	15.8(1) s	1+
^100m1Tc	200.67(4) keV			8.32(14) µs	(4)+
^100m2Tc	243.96(4) keV			3.2(2) µs	(6)+
¹⁰¹Tc	43	58	100.907315(26)	14.22(1) min	9/2+
^101mTc	207.53(4) keV			636(8) µs	1/2-
¹⁰²Tc	43	59	101.909215(10)	5.28(15) s	1+
^102mTc	20(10) keV			4.35(7) min	(4,5)
¹⁰³Tc	43	60	102.909181(11)	54.2(8) s	5/2+
¹⁰⁴Tc	43	61	103.91145(5)	18.3(3) min	(3+)#
^104m1Tc	69.7(2) keV			3.5(3) µs	2(+)
^104m2Tc	106.1(3) keV			0.40(2) µs	(+)
¹⁰⁵Tc	43	62	104.91166(6)	7.6(1) min	(3/2-)
¹⁰⁶Tc	43	63	105.914358(14)	35.6(6) s	(1,2)
¹⁰⁷Tc	43	64	106.91508(16)	21.2(2) s	(3/2-)
^107mTc	65.7(10) keV			184(3) ns	(5/2-)
¹⁰⁸Tc	43	65	107.91846(14)	5.17(7) s	(2)+
¹⁰⁹Tc	43	66	108.91998(10)	860(40) ms	3/2-#
¹¹⁰Tc	43	67	109.92382(8)	0.92(3) s	(2+)
¹¹¹Tc	43	68	110.92569(12)	290(20) ms	3/2-#
¹¹²Tc	43	69	111.92915(13)	290(20) ms	2+#
¹¹³Tc	43	70	112.93159(32)#	170(20) ms	3/2-#
¹¹⁴Tc	43	71	113.93588(64)#	150(30) ms	2+#
¹¹⁵Tc	43	72	114.93869(75)#	100# ms [>300 ns]	3/2-#
¹¹⁶Tc	43	73	115.94337(75)#	90# ms [>300 ns]	2+#
¹¹⁷Tc	43	74	116.94648(75)#	40# ms [>300 ns]	3/2-#
¹¹⁸Tc	43	75	117.95148(97)#	30# ms [>300 ns]	2+#

[edit] Notes

Values marked # are not purely derived from experimental data, but at least partly from systematic trends. Spins with weak assignment arguments are enclosed in parentheses.
Uncertainties are given in concise form in parentheses after the corresponding last digits. Uncertainty values denote one standard deviation, except isotopic composition and standard atomic mass from IUPAC which use expanded uncertainties.

[edit] References

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.