Isotopes of hafnium

More information Nuclide, Z ...

Nuclide ^{[n 1]}	Z	N	Isotopic mass (Da)^[7] ^{[n 2]}^{[n 3]}	Half-life^[1] ^{[n 4]}^{[n 5]}	Decay mode^[1] ^{[n 6]}	Daughter isotope ^{[n 7]}	Spin and parity^[1] ^{[n 8]}^{[n 5]}	Natural abundance (mole fraction)
Nuclide ^{[n 1]}	Excitation energy^{[n 5]}			Half-life^[1] ^{[n 4]}^{[n 5]}	Decay mode^[1] ^{[n 6]}	Daughter isotope ^{[n 7]}	Spin and parity^[1] ^{[n 8]}^{[n 5]}	Normal proportion^[1]	Range of variation
¹⁵³Hf	72	81	152.97069(32)#	400# ms [>200 ns]			1/2+#
¹⁵⁴Hf	72	82	153.96486(32)#	2(1) s	β⁺	¹⁵⁴Lu	0+
¹⁵⁴Hf	72	82	153.96486(32)#	2(1) s	α (rare)	¹⁵⁰Yb	0+
^154mHf	2721(50)# keV			9(4) μs	IT	¹⁵⁴Hf	(10+)
¹⁵⁵Hf	72	83	154.96317(32)#	843(30) ms	β⁺	¹⁵⁵Lu	7/2−#
¹⁵⁶Hf	72	84	155.95940(16)	23(1) ms	α	¹⁵²Yb	0+
^156mHf	1958.8(10) keV			480(40) μs	α	¹⁵²Yb	(8+)
¹⁵⁷Hf	72	85	156.95829(22)#	115(1) ms	α (94%)	¹⁵³Yb	7/2−
¹⁵⁷Hf	72	85	156.95829(22)#	115(1) ms	β⁺ (6%)	¹⁵⁷Lu	7/2−
¹⁵⁸Hf	72	86	157.954801(19)	2.85(7) s	β⁺ (55.7%)	¹⁵⁸Lu	0+
¹⁵⁸Hf	72	86	157.954801(19)	2.85(7) s	α (44.3%)	¹⁵⁴Yb	0+
¹⁵⁹Hf	72	87	158.953996(18)	5.20(10) s	β⁺ (65%)	¹⁵⁹Lu	7/2−
¹⁵⁹Hf	72	87	158.953996(18)	5.20(10) s	α (35%)	¹⁵⁵Yb	7/2−
¹⁶⁰Hf	72	88	159.950683(10)	13.6(2) s	β⁺ (99.3%)	¹⁶⁰Lu	0+
¹⁶⁰Hf	72	88	159.950683(10)	13.6(2) s	α (0.7%)	¹⁵⁶Yb	0+
¹⁶¹Hf	72	89	160.950278(25)	18.4(4) s	β⁺ (99.71%)	¹⁶¹Lu	(7/2−)
¹⁶¹Hf	72	89	160.950278(25)	18.4(4) s	α (0.29%)	¹⁵⁷Yb	(7/2−)
^161mHf	329.0(5) keV			4.8(2) μs	IT	¹⁶¹Hf	(13/2+)
¹⁶²Hf	72	90	161.9472155(96)	39.4(9) s	β⁺ (99.99%)	¹⁶²Lu	0+
¹⁶²Hf	72	90	161.9472155(96)	39.4(9) s	α (0.008%)	¹⁵⁸Yb	0+
¹⁶³Hf	72	91	162.947107(28)	40.0(6) s	β⁺	¹⁶³Lu	(5/2−)
¹⁶⁴Hf	72	92	163.944371(17)	111(8) s	β⁺	¹⁶⁴Lu	0+
¹⁶⁵Hf	72	93	164.944567(30)	76(4) s	β⁺	¹⁶⁵Lu	(5/2−)
¹⁶⁶Hf	72	94	165.942180(30)	6.77(30) min	β⁺	¹⁶⁶Lu	0+
¹⁶⁷Hf	72	95	166.942600(30)	2.05(5) min	β⁺	¹⁶⁷Lu	(5/2)−
¹⁶⁸Hf	72	96	167.940568(30)	25.95(20) min	EC (98%)	¹⁶⁸Lu	0+
¹⁶⁸Hf	72	96	167.940568(30)	25.95(20) min	β⁺ (2%)	¹⁶⁸Lu	0+
¹⁶⁹Hf	72	97	168.941259(30)	3.24(4) min	β⁺	¹⁶⁹Lu	(5/2−)
¹⁷⁰Hf	72	98	169.939609(30)	16.01(13) h	EC	¹⁷⁰Lu	0+
¹⁷¹Hf	72	99	170.940492(31)	12.1(4) h	β⁺	¹⁷¹Lu	7/2+
^171mHf	21.93(9) keV			29.5(9) s	IT	¹⁷¹Hf	1/2−
¹⁷²Hf	72	100	171.939450(26)	1.87(3) y	EC	¹⁷²Lu	0+
^172mHf	2005.84(11) keV			163(3) ns	IT	¹⁷²Hf	(8−)
¹⁷³Hf	72	101	172.940513(30)	23.6(1) h	β⁺	¹⁷³Lu	1/2−
^173m1Hf	107.16(5) keV			180(8) ns	IT	¹⁷³Hf	5/2−
^173m2Hf	197.47(10) keV			160(40) ns	IT	¹⁷³Hf	7/2+
¹⁷⁴Hf^{[n 9]}	72	102	173.9400484(24)	3.8+1.7 −0.9×10¹⁶ y^[2]	α^{[n 10]}	¹⁷⁰Yb	0+	0.0016(12)
^174m1Hf	1549.26(4) keV			138(4) ns	IT	¹⁷⁴Hf	6+
^174m2Hf	1797.59(7) keV			2.39(4) μs	IT	¹⁷⁴Hf	8−
^174m3Hf	3312.07(6) keV			3.7(2) μs	IT	¹⁷⁴Hf	14+
¹⁷⁵Hf	72	103	174.9415114(25)	69.90(7) d^[3]	EC	¹⁷⁵Lu	5/2−
^175m1Hf	125.89(12) keV			53.7(15) μs	IT	¹⁷⁵Hf	1/2−
^175m2Hf	1433.41(12) keV			1.10(8) μs	IT	¹⁷⁵Hf	19/2+
^175m3Hf	3015.6(4) keV			1.21(15) μs	IT	¹⁷⁵Hf	35/2−
^175m4Hf	4636.2(12) keV			1.9(1) μs	IT	¹⁷⁵Hf	45/2+
¹⁷⁶Hf^{[n 11]}	72	104	175.9414098(16)	Observationally Stable^{[n 12]}			0+	0.0526(70)
^176m1Hf	1333.07(7) keV			9.6(3) μs	IT	¹⁷⁶Hf	6+
^176m2Hf	1559.31(9) keV			9.9(2) μs	IT	¹⁷⁶Hf	8−
^176m3Hf	2865.8(7) keV			401(6) μs	IT	¹⁷⁶Hf	14−
^176m4Hf	4863.6(9) keV			43(4) μs	IT	¹⁷⁶Hf	22−
¹⁷⁷Hf	72	105	176.9432302(15)	Observationally Stable^{[n 13]}			7/2−	0.1860(16)
^177m1Hf	1315.4502(8) keV			1.09(5) s	IT	¹⁷⁷Hf	23/2+
^177m2Hf	1342.4(10) keV			55.9(12) μs	IT	¹⁷⁷Hf	(19/2−)
^177m3Hf	2740.02(15) keV			51.4(5) min	IT	¹⁷⁷Hf	37/2−
¹⁷⁸Hf	72	106	177.9437083(15)	Observationally Stable^{[n 14]}			0+	0.2728(28)
^178m1Hf	1147.416(6) keV			4.0(2) s	IT	¹⁷⁸Hf	8−
^178m2Hf	2446.09(8) keV			31(1) y	IT	¹⁷⁸Hf	16+
^178m3Hf	2572.4(3) keV			68(2) μs	IT	¹⁷⁸Hf	14−
¹⁷⁹Hf	72	107	178.9458257(15)	Observationally Stable^{[n 15]}			9/2+	0.1362(11)
^179m1Hf	375.0352(25) keV			18.67(4) s	IT	¹⁷⁹Hf	1/2−
^179m2Hf	1106.412(33) keV			25.00(17) d	IT	¹⁷⁹Hf	25/2−
^179m3Hf	3775.2(21) keV			15(5) μs	IT	¹⁷⁹Hf	(43/2+)
¹⁸⁰Hf	72	108	179.9465595(15)	Observationally Stable^{[n 16]}			0+	0.3508(33)
^180m1Hf	1141.552(15) keV			5.53(2) h	IT (99.69%)	¹⁸⁰Hf	8−
^180m1Hf	1141.552(15) keV			5.53(2) h	β⁻ (0.31%)	^180m1Ta^[8]	8−
^180m2Hf	1374.36(4) keV			570(20) μs	IT	¹⁸⁰Hf	4−
^180m3Hf	2485.5(5) keV			0.94(11) μs	IT	¹⁸⁰Hf	12+
^180m4Hf	3599.0(10) keV			90(10) μs	IT	¹⁸⁰Hf	(18−)
¹⁸¹Hf	72	109	180.9491108(15)	42.39(6) d	β⁻	¹⁸¹Ta	1/2−
^181m1Hf	595.27(4) keV			80(5) μs	IT	¹⁸¹Hf	(9/2+)
^181m2Hf	1043.5(8) keV			~100 μs	IT	¹⁸¹Hf	(17/2+)
^181m3Hf	1741.9(13) keV			1.5(5) ms	IT	¹⁸¹Hf	(25/2−)
¹⁸²Hf^{[n 17]}	72	110	181.9505637(66)	8.90(9)×10⁶ y	β⁻	¹⁸²Ta	0+
^182m1Hf	1172.87(18) keV			61.5(15) min	β⁻ (54%)	¹⁸²Ta	8−
^182m1Hf	1172.87(18) keV			61.5(15) min	IT (46%)	¹⁸²Hf	8−
^182m2Hf	2571.3(12) keV			40(10) μs	IT	¹⁸²Hf	(13+)
¹⁸³Hf	72	111	182.953533(32)	1.018(2) h	β⁻	¹⁸³Ta	(3/2−)
^183mHf	1464(64) keV			40(30) s	IT	¹⁸³Hf	27/2−#
¹⁸⁴Hf	72	112	183.955449(43)	4.12(5) h	β⁻	¹⁸⁴Ta	0+
^184m1Hf	1272.2(4) keV			48(10) s	IT	¹⁸⁴Hf	8−
^184m2Hf	2477(10) keV			16(7) min			15+#
¹⁸⁵Hf	72	113	184.958862(69)	3.5(6) min	β⁻	¹⁸⁵Ta	(9/2−)
¹⁸⁶Hf	72	114	185.960897(55)	2.6(12) min	β⁻	¹⁸⁶Ta	0+
^186mHf	2968(43) keV			>20 s			17+#
¹⁸⁷Hf	72	115	186.96457(22)#	14# s [>300 ns]			9/2−#
^187mHf	500(300)# keV			270(80) ns	IT	¹⁸⁷Hf	3/2−#
¹⁸⁸Hf	72	116	187.96690(32)#	7# s [>300 ns]			0+
¹⁸⁹Hf	72	117	188.97085(32)#	400# ms [>300 ns]			3/2−#
¹⁹⁰Hf	72	118	189.97338(43)#	600# ms [>300 ns]			0+
¹⁹¹Hf^[9]	72	119
¹⁹²Hf^[9]	72	120					0+
This table header & footer: view

[1]
^mHf – Excited nuclear isomer.
[2]
( ) – Uncertainty (1σ) is given in concise form in parentheses after the corresponding last digits.
[3]
# – Atomic mass marked #: value and uncertainty derived not from purely experimental data, but at least partly from trends from the Mass Surface (TMS).
[4]
Bold half-life – nearly stable, half-life longer than age of universe.
[5]
# – Values marked # are not purely derived from experimental data, but at least partly from trends of neighboring nuclides (TNN).
[6]
Modes of decay:

EC: Electron capture

IT: Isomeric transition
[7]
Bold symbol as daughter – Daughter product is stable.
[8]
( ) spin value – Indicates spin with weak assignment arguments.
[9]
primordial radionuclide
[10]
Theorized to also undergo β⁺β⁺ decay to ¹⁷⁴Yb
[11]
Used in lutetium-hafnium dating
[12]
Believed to undergo α decay to ¹⁷²Yb
[13]
Believed to undergo α decay to ¹⁷³Yb with a half-life over 1.3×10¹⁸ y.
[14]
Believed to undergo α decay to ¹⁷⁴Yb
[15]
Believed to undergo α decay to ¹⁷⁵Yb
[16]
Believed to undergo α decay to ¹⁷⁶Yb
[17]
Extinct radionuclide, used in hafnium–tungsten dating^[6]

Isotopes of hafnium

List of isotopes

See also

References

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