Krypton-86

Isotopes of krypton (₃₆Kr)
β+	79Br
γ	–
ε	81Br
Standard atomic weight Ar°(Kr)
	83.798±0.002; 83.798±0.002 (abridged);
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Isotopes of krypton

Isotopes of the element Krypton

There are 34 known isotopes of krypton (₃₆Kr) with atomic mass numbers from 69 through 102.^[5]^[6] Naturally occurring krypton is made of five stable isotopes and one (⁷⁸
Kr
) which is slightly radioactive with an extremely long half-life, plus traces of radioisotopes that are produced by cosmic rays in the atmosphere.

Quick Facts Main isotopes, Decay ...

List of isotopes

More information Nuclide, Z ...

Nuclide ^{[n 1]}	Z	N	Isotopic mass (Da) ^{[n 2]}^{[n 3]}	Half-life ^{[n 4]}^{[n 5]}	Decay mode ^{[n 6]}	Daughter isotope ^{[n 7]}^{[n 8]}	Spin and parity ^{[n 9]}^{[n 5]}	Natural abundance (mole fraction)
Nuclide ^{[n 1]}	Excitation energy			Half-life ^{[n 4]}^{[n 5]}	Decay mode ^{[n 6]}	Daughter isotope ^{[n 7]}^{[n 8]}	Spin and parity ^{[n 9]}^{[n 5]}	Normal proportion	Range of variation
⁶⁹Kr	36	33	68.96518(43)#	32(10) ms	β⁺	⁶⁹Br	5/2−#
⁷⁰Kr	36	34	69.95526(41)#	52(17) ms	β⁺	⁷⁰Br	0+
⁷¹Kr	36	35	70.94963(70)	100(3) ms	β⁺ (94.8%)	⁷¹Br	(5/2)−
⁷¹Kr	36	35	70.94963(70)	100(3) ms	β⁺, p (5.2%)	⁷⁰Se	(5/2)−
⁷²Kr	36	36	71.942092(9)	17.16(18) s	β⁺	⁷²Br	0+
⁷³Kr	36	37	72.939289(7)	28.6(6) s	β⁺ (99.32%)	⁷³Br	3/2−
⁷³Kr	36	37	72.939289(7)	28.6(6) s	β⁺, p (.68%)	⁷²Se	3/2−
^73mKr	433.66(12) keV			107(10) ns			(9/2+)
⁷⁴Kr	36	38	73.9330844(22)	11.50(11) min	β⁺	⁷⁴Br	0+
⁷⁵Kr	36	39	74.930946(9)	4.29(17) min	β⁺	⁷⁵Br	5/2+
⁷⁶Kr	36	40	75.925910(4)	14.8(1) h	β⁺	⁷⁶Br	0+
⁷⁷Kr	36	41	76.9246700(21)	74.4(6) min	β⁺	⁷⁷Br	5/2+
⁷⁸Kr^{[n 10]}	36	42	77.9203648(12)	9.2 ^+5.5 _−2.6 ±1.3×10²¹ y^[2]	Double EC	⁷⁸Se	0+	0.00355(3)
⁷⁹Kr	36	43	78.920082(4)	35.04(10) h	β⁺	⁷⁹Br	1/2−
^79mKr	129.77(5) keV			50(3) s			7/2+
⁸⁰Kr	36	44	79.9163790(16)	Stable			0+	0.02286(10)
⁸¹Kr^{[n 11]}	36	45	80.9165920(21)	2.29(11)×10⁵ y	EC	⁸¹Br	7/2+	trace
^81mKr	190.62(4) keV			13.10(3) s	IT (99.975%)	⁸¹Kr	1/2−
^81mKr	190.62(4) keV			13.10(3) s	EC (.025%)	⁸¹Br	1/2−
⁸²Kr	36	46	81.9134836(19)	Stable			0+	0.11593(31)
⁸³Kr^{[n 12]}	36	47	82.914136(3)	Stable			9/2+	0.11500(19)
^83m1Kr	9.4053(8) keV			154.4(11) ns			7/2+
^83m2Kr	41.5569(10) keV			1.83(2) h	IT	⁸³Kr	1/2−
⁸⁴Kr^{[n 12]}	36	48	83.911507(3)	Stable			0+	0.56987(15)
^84mKr	3236.02(18) keV			1.89(4) µs			8+
⁸⁵Kr^{[n 12]}	36	49	84.9125273(21)	10.776(3) y	β⁻	⁸⁵Rb	9/2+	trace
^85m1Kr	304.871(20) keV			4.480(8) h	β⁻ (78.6%)	⁸⁵Rb	1/2−
^85m1Kr	304.871(20) keV			4.480(8) h	IT (21.4%)	⁸⁵Kr	1/2−
^85m2Kr	1991.8(13) keV			1.6(7) µs [1.2(+10-4) µs]			(17/2+)
⁸⁶Kr^{[n 13]}^{[n 12]}	36	50	85.91061073(11)	Observationally Stable^{[n 14]}			0+	0.17279(41)
⁸⁷Kr	36	51	86.91335486(29)	76.3(5) min	β⁻	⁸⁷Rb	5/2+
⁸⁸Kr	36	52	87.914447(14)	2.84(3) h	β⁻	⁸⁸Rb	0+
⁸⁹Kr^{[n 12]}	36	53	88.91763(6)	3.15(4) min	β⁻	⁸⁹Rb	3/2(+#)
⁹⁰Kr	36	54	89.919517(20)	32.32(9) s	β⁻	^90mRb	0+
⁹¹Kr	36	55	90.92345(6)	8.57(4) s	β⁻	⁹¹Rb	5/2(+)
⁹²Kr^{[n 12]}	36	56	91.926156(13)	1.840(8) s	β⁻ (99.96%)	⁹²Rb	0+
⁹²Kr^{[n 12]}	36	56	91.926156(13)	1.840(8) s	β⁻, n (.033%)	⁹¹Rb	0+
⁹³Kr	36	57	92.93127(11)	1.286(10) s	β⁻ (98.05%)	⁹³Rb	1/2+
⁹³Kr	36	57	92.93127(11)	1.286(10) s	β⁻, n (1.95%)	⁹²Rb	1/2+
⁹⁴Kr	36	58	93.93436(32)#	210(4) ms	β⁻ (94.3%)	⁹⁴Rb	0+
⁹⁴Kr	36	58	93.93436(32)#	210(4) ms	β⁻, n (5.7%)	⁹³Rb	0+
⁹⁵Kr	36	59	94.93984(43)#	114(3) ms	β⁻	⁹⁵Rb	1/2(+)
⁹⁶Kr	36	60	95.942998(62)^[7]	80(7) ms	β⁻	⁹⁶Rb	0+
⁹⁷Kr	36	61	96.94856(54)#	63(4) ms	β⁻	⁹⁷Rb	3/2+#
⁹⁷Kr	36	61	96.94856(54)#	63(4) ms	β⁻, n	⁹⁶Rb	3/2+#
⁹⁸Kr	36	62	97.95191(64)#	46(8) ms			0+
⁹⁹Kr	36	63	98.95760(64)#	40(11) ms			(3/2+)#
¹⁰⁰Kr	36	64	99.96114(54)#	10# ms [>300 ns]			0+
¹⁰¹Kr	36	65	unknown	>635 ns	β⁻, 2n	⁹⁹Rb	unknown
					β⁻, n	¹⁰⁰Rb
					β⁻	¹⁰¹Rb
¹⁰²Kr^[8]	36	66					0+
This table header & footer: view

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

n: Neutron emission
[n 7]
Bold italics symbol as daughter – Daughter product is nearly stable.
[n 8]
Bold symbol as daughter – Daughter product is stable.
[n 9]
( ) spin value – Indicates spin with weak assignment arguments.
[N 10]
Primordial radionuclide
[N 11]
Used to date groundwater
[N 12]
Fission product
[N 13]
Formerly used to define the meter
[N 14]
Believed to decay by β⁻β⁻ to ⁸⁶Sr

The isotopic composition refers to that in air.

Notable isotopes

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This article uses material from the Wikipedia article Krypton-86, and is written by contributors. Text is available under a CC BY-SA 4.0 International License; additional terms may apply. Images, videos and audio are available under their respective licenses.

[7] [n 1]
^mKr – Excited nuclear isomer.

[8] [n 2]
( ) – Uncertainty (1σ) is given in concise form in parentheses after the corresponding last digits.

[TMS-9] [n 3]
# – Atomic mass marked #: value and uncertainty derived not from purely experimental data, but at least partly from trends from the Mass Surface (TMS).

[10] [n 4]
Bold half-life – nearly stable, half-life longer than age of universe.

[TNN-11] [n 5]
# – Values marked # are not purely derived from experimental data, but at least partly from trends of neighboring nuclides (TNN).

[12] [n 6]
Modes of decay:

n: Neutron emission

[13] [n 7]
Bold italics symbol as daughter – Daughter product is nearly stable.

[14] [n 8]
Bold symbol as daughter – Daughter product is stable.

[15] [n 9]
( ) spin value – Indicates spin with weak assignment arguments.

[16] [N 10]
Primordial radionuclide

[17] [N 11]
Used to date groundwater

[FP-18] [N 12]
Fission product

[19] [N 13]
Formerly used to define the meter

[20] [N 14]
Believed to decay by β⁻β⁻ to ⁸⁶Sr

[NUBASE2020-1] [1]
Kondev, F. G.; Wang, M.; Huang, W. J.; Naimi, S.; Audi, G. (2021). "The NUBASE2020 evaluation of nuclear properties" (PDF). Chinese Physics C. 45 (3): 030001. doi:10.1088/1674-1137/abddae.

[Patrignani2016-2] [2]
Patrignani, C.; et al. (Particle Data Group) (2016). "Review of Particle Physics". Chinese Physics C. 40 (10): 100001. Bibcode:2016ChPhC..40j0001P. doi:10.1088/1674-1137/40/10/100001. See p. 768

[3] [3]
"Standard Atomic Weights: Krypton". CIAAW. 2001.

[CIAAW2021-4] [4]
Prohaska, Thomas; Irrgeher, Johanna; Benefield, Jacqueline; Böhlke, John K.; Chesson, Lesley A.; Coplen, Tyler B.; Ding, Tiping; Dunn, Philip J. H.; Gröning, Manfred; Holden, Norman E.; Meijer, Harro A. J. (2022-05-04). "Standard atomic weights of the elements 2021 (IUPAC Technical Report)". Pure and Applied Chemistry. doi:10.1515/pac-2019-0603. ISSN 1365-3075.

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"Chart of Nuclides". Brookhaven National Laboratory. Archived from the original on 2017-10-18. Retrieved 2011-11-21.

[6] [6]
Sumikama, T.; et al. (2021). "Observation of new neutron-rich isotopes in the vicinity of Zr110". Physical Review C. 103 (1): 014614. Bibcode:2021PhRvC.103a4614S. doi:10.1103/PhysRevC.103.014614. hdl:10261/260248. S2CID 234019083.

[21] [7]
Smith, Matthew B.; Murböck, Tobias; Dunling, Eleanor; Jacobs, Andrew; Kootte, Brian; Lan, Yang; Leistenschneider, Erich; Lunney, David; Lykiardopoulou, Eleni Marina; Mukul, Ish; Paul, Stefan F.; Reiter, Moritz P.; Will, Christian; Dilling, Jens; Kwiatkowski, Anna A. (2020). "High-precision mass measurement of neutron-rich 96Kr". Hyperfine Interactions. 241 (1): 59. Bibcode:2020HyInt.241...59S. doi:10.1007/s10751-020-01722-2. S2CID 220512482.

[101Br-aps-22] [8]
Sumikama, T.; et al. (2021). "Observation of new neutron-rich isotopes in the vicinity of Zr110". Physical Review C. 103 (1): 014614. Bibcode:2021PhRvC.103a4614S. doi:10.1103/PhysRevC.103.014614. hdl:10261/260248. S2CID 234019083.

[cosmo-23] [9]
Leya, I.; Gilabert, E.; Lavielle, B.; Wiechert, U.; Wieler, W. (2004). "Production rates for cosmogenic krypton and argon isotopes in H-chondrites with known ³⁶Cl-³⁶Ar ages" (PDF). Antarctic Meteorite Research. 17: 185–199. Bibcode:2004AMR....17..185L.

[24] [10]
N. Thonnard; L. D. MeKay; T. C. Labotka (2001). Development of Laser-Based Resonance Ionization Techniques for 81-Kr and 85-Kr Measurements in the Geosciences (PDF) (Report). University of Tennessee, Institute for Rare Isotope Measurements. pp. 4–7. doi:10.2172/809813.

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"Resources on Isotopes". U.S. Geological Survey. Archived from the original on 2001-09-24. Retrieved 2007-03-20.

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Krypton-86

Isotopes of krypton

List of isotopes

Notable isotopes

Krypton-81

Krypton-85

Atmospheric concentration

Krypton-86

Others

References

Sources

External links

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