Isotopen van krypton

Het chemisch element krypton (Kr), met een atoommassa van 83,798(2) u, bezit 6 stabiele isotopen: 78Kr, 80Kr, 82Kr, 83Kr, 84Kr en 86Kr, waarvan 84Kr het meest abundant is (ongeveer 57%). De overige 25 radio-isotopen zijn onstabiel en hebben een relatief korte halveringstijd (de meeste minder dan een seconde).

De kortstlevende isotoop van krypton is 100Kr, met een halfwaardetijd van ongeveer 10 milliseconden. De langstlevende is 81Kr, met een halfwaardetijd van ongeveer 229.000 jaar. Krypton-81 wordt gebruikt om zeer oud grondwater (50.000 - 800.000 jaar) te dateren.[1]

Overzicht

Nuclide Z (p) N (n) Isotopische massa (u) Halveringstijd Radioactief verval VP Kernspin Isotopische verhouding
(molfractie)
Natuurlijk voorkomen
(molfractie)
Excitatie-energie
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
β+, p (5,2%) 70Se
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
β+, p (0,68%) 72Se
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) uur β+ 76Br 0+
77Kr 36 41 76,9246700(21) 74,4(6) min β+ 77Br 5/2+
78Kr 36 42 77,9203648(12) stabiel 0+ 0,00355(3)
79Kr 36 43 78,920082(4) 35,04(10) uur β+ 79Br 1/2
79mKr 129,77(5) keV 50(3) s 7/2+
80Kr 36 44 79,9163790(16) stabiel 0+ 0,02286(10)
81Kr 36 45 80,9165920(21) 229.110 jaar EV 81Br 7/2+
81mKr 190,62(4) keV 13,10(3) s IT (99,975%) 81Kr 1/2
EV (0,025%) 81Br
82Kr 36 46 81,9134836(19) stabiel 0+ 0,11593(31)
83Kr 36 47 82,914136(3) stabiel 9/2+ 0,11500(19)
83m1Kr 9,4053(8) keV 154,4(11) ns 7/2+
83m2Kr 41,5569(10) keV 1,83(2) uur IT 83Kr 1/2
84Kr 36 48 83,911507(3) stabiel 0+ 0,56987(15)
84mKr 3236,02(18) keV 1,89(4) µs 8+
85Kr 36 49 84,9125273(21) 10,776(3) jaar β 85Rb 9/2+
85m1Kr 304,871(20) keV 4,480(8) uur β (78,6%) 85Rb 1/2
IT (21,4%) 85Kr
85m2Kr 1991,8(13) keV 1,6(7) µs (17/2+)
86Kr 36 50 85,91061073(11) stabiel 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) uur β 88Rb 0+
89Kr 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 36 56 91,926156(13) 1,840(8) s β (99,96%) 92Rb 0+
β, n (0,033%) 91Rb
93Kr 36 57 92,93127(11) 1,286(10) s β (98,05%) 93Rb 1/2+
β, n (1,95%) 92Rb
94Kr 36 58 93,93436(32) 210(4) ms β (94,3%) 94Rb 0+
β, n (5,7%) 93Rb
95Kr 36 59 94,93984(43) 114(3) ms β 95Rb 1/2+
96Kr 36 60 95,94307(54) 80(7) ms β 96Rb 0+
97Kr 36 61 96,94856(54) 63(4) ms β 97Rb 3/2+
β, n 96Rb
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 0+

Overzicht van isotopen per element

1 18
1 H 2 Periodiek systeem 13 14 15 16 17 He
2 Li Be De links verwijzen naar isotopen per element B C N O F Ne
3 Na Mg 3 4 5 6 7 8 9 10 11 12 Al Si P S Cl Ar
4 K Ca Sc Ti V Cr Mn Fe Co Ni Cu Zn Ga Ge As Se Br Kr
5 Rb Sr Y Zr Nb Mo Tc Ru Rh Pd Ag Cd In Sn Sb Te I Xe
6 Cs Ba Hf Ta W Re Os Ir Pt Au Hg Tl Pb Bi Po At Rn
7 Fr Ra ↓↓ Rf Db Sg Bh Hs Mt Ds Rg Cn Nh Fl Mc Lv Ts Og
 
Lanthaniden La Ce Pr Nd Pm Sm Eu Gd Tb Dy Ho Er Tm Yb Lu
Actiniden Ac Th Pa U Np Pu Am Cm Bk Cf Es Fm Md No Lr

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