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Isotopes of Zinc

List, data and properties of all known isotopes of Zinc as well as radioactive decay products and intermediate products.

 

Zinc isotopes

All atomic nuclei of the chemical element zinc are summarized under zinc isotopes; these all consist of an atomic nucleus with 30 protons and, in the uncharged state, 30 electrons. The difference between the individual zinc isotopes is based on the number of neutrons in the nucleus.

 

Naturally Occurring Zinc Isotopes

Natural zinc deposits consist of the four stable isotopes Zn-64, Zn-66, Zn-67 and Zn-68 as well as the very long-lived Zn-70. In addition, 25 zinc radioisotopes are known.

The following table provides information about the natural isotopic composition of zinc:

Atomic Mass maQuantityHalf-lifeSpin
Zinc
Isotopic mixture
65,38 u100 %
Isotope 64Zn63,929142(5) u49,17(75) %stable0+
Isotope 66Zn65,926034(6) u27,73(98) %stable0+
Isotope 67Zn66,927128(6) u4,04(16) %stable5/2-
Isotope 68Zn67,924845(6) u18,45(63) %stable0+
Isotope 70Zn69,92532(2) u0,61(10) %3.8 × 1018 a0+

 

Isotope Table: Zinc

 

Atomic Properties

Isotope
Nuclide
ZANNameAtomic Mass
[Nuclear Mass]
{Mass Excess}
Spin I
(h/2π)
μParent
123456789
54Zn305424Zinc-5453.99327(43) u
[53.9768131 u]
{-6.26895 MeV}
0+
55Zn305525Zinc-5554.98436(43) u
[54.9679031 u]
{-14.56857 MeV}
5/2-
56Zn305626Zinc-5655.97274(43) u
[55.9562831 u]
{-25.39253 MeV}
0+
57Zn305727Zinc-5756.96506(21) u
[56.9486031 u]
{-32.5464 MeV}
(7/2-)
58Zn305828Zinc-5857.95459(5) u
[57.9381331 u]
{-42.29914 MeV}
0+
59Zn305929Zinc-5958.9493120(8) u
[58.9328551 u]
{-47.21557 MeV}
3/2-
60Zn306030Zinc-6059.9418414(6) u
[59.9253845 u]
{-54.17439 MeV}
0+60Ga
61Zn306131Zinc-6160.939507(17) u
[60.9230501 u]
{-56.34887 MeV}
3/2-61Ga
62Zn306232Zinc-6261.9343335(7) u
[61.9178766 u]
{-61.16795 MeV}
0+62Ga
63Zn306333Zinc-6362.9332112(17) u
[62.9167543 u]
{-62.21337 MeV}
3/2--0.28164(5)63Ga
64Zn306434Zinc-6463.929142(5) u
[63.9126851 u]
{-66.0038 MeV}
0+64Ga
64Cu
65Zn306535Zinc-6564.9292405(7) u
[64.9127836 u]
{-65.91205 MeV}
5/2-+0.7690(2)65Ga
65mZn306535Zinc-65m64.9292405(7) u
[64.9127836 u]
{-65.91205 MeV}
(1/2)-
66Zn306636Zinc-6665.926034(6) u
[65.9095771 u]
{-68.89889 MeV}
0+66Ga
66Cu
67Zn306737Zinc-6766.927128(6) u
[66.9106711 u]
{-67.87983 MeV}
5/2-+0.875479(9)67Ga
67Cu
67m1Zn306737Zinc-67m166.927128(6) u
[66.9106711 u]
{-67.87983 MeV}
1/2-+0.587(11)
67m2Zn306737Zinc-67m266.927128(6) u
[66.9106711 u]
{-67.87983 MeV}
9/2+-1.097(9)
68Zn306838Zinc-6867.924845(6) u
[67.9083881 u]
{-70.00643 MeV}
0+68Ga
68Cu
69Zn306939Zinc-6968.9265504(9) u
[68.9100935 u]
{-68.41786 MeV}
1/2-+0.557(2)69Cu
69mZn306939Zinc-69m68.9265504(9) u
[68.9100935 u]
{-68.41786 MeV}
9/2+1.157(2)
70Zn307040Zinc-7069.92532(2) u
[69.9088631 u]
{-69.56397 MeV}
0+70Cu
70Ga
71Zn307141Zinc-7170.9277196(28) u
[70.9112627 u]
{-67.32876 MeV}
1/2-+0.551(1)71Cu
71mZn307141Zinc-71m70.9277196(28) u
[70.9112627 u]
{-67.32876 MeV}
9/2+-1.052(6)
72Zn307242Zinc-7271.9268428(23) u
[71.9103859 u]
{-68.14549 MeV}
0+72Cu
73Zn307343Zinc-7372.9295826(20) u
[72.9131257 u]
{-65.59339 MeV}
1/2-+0.5585(5)73Cu
73m1Zn307343Zinc-73m172.9295826(20) u
[72.9131257 u]
{-65.59339 MeV}
5/2+-0.8527(14)
73m2Zn307343Zinc-73m272.9295826(20) u
[72.9131257 u]
{-65.59339 MeV}
(7/2+)-0.8521(14)
74Zn307444Zinc-7473.9294073(27) u
[73.9129504 u]
{-65.75668 MeV}
0+74Cu
75Cu
75Zn307545Zinc-7574.9328402(21) u
[74.9163833 u]
{-62.55895 MeV}
(7/2+)-0.7881(9)76Cu
76Zn307646Zinc-7675.9331150(16) u
[75.9166581 u]
{-62.30298 MeV}
0+76Cu
77Cu
77Zn307747Zinc-7776.9368872(21) u
[76.9204303 u]
{-58.78919 MeV}
(7/2+)-0.9067(1)
77mZn307747Zinc-77m76.9368872(21) u
[76.9204303 u]
{-58.78919 MeV}
(1/2-)+0.562(2)
78Zn307848Zinc-7877.9382892(21) u
[77.9218323 u]
{-57.48324 MeV}
0+79Cu
78mZn307848Zinc-78m77.9382892(21) u
[77.9218323 u]
{-57.48324 MeV}
(8+)
79Zn307949Zinc-7978.9426381(24) u
[78.9261812 u]
{-53.43227 MeV}
9/2+-1.1866(10)79Cu
80Zn308050Zinc-8079.9445529(28) u
[79.928096 u]
{-51.64864 MeV}
0+
81Zn308151Zinc-8180.950403(5) u
[80.9339461 u]
{-46.19931 MeV}
(5/2+)
82Zn308252Zinc-8281.954574(3) u
[81.9381171 u]
{-42.31405 MeV}
0+
83Zn308353Zinc-8382.96104(32) u
[82.9445831 u]
{-36.29101 MeV}
84Zn308454Zinc-8483.96572(43) u
[83.9492631 u]
{-31.93161 MeV}
0+
85Zn308555Zinc-8584.97291(54) u
[84.9564531 u]
{-25.23417 MeV}

 

Radioactive Decay Properties

IsotopeRadioactive DecayAEExtern
Half-lifeDecay ModeProbabilityEnergy
1101112131415
Zn-541.59 ms2p → 52NiAL
Zn-5520 msEC p → 54Ni
β+55Cu
91(5) %
?

17.07(43) MeV
AL
Zn-5630.0(17) msβ+56Cu
ε, p → 55Ni
?
86.0(49) %
13.25(40) MeV
AL
Zn-5740(10) msEC/β+57Cu
β+, p → 56Ni
≤ 35 %
≥ 65 %
14.76(20) MeV
AL
Zn-5886.7(24) msEC/β+58Cu
ε, p → 57Ni
> 97 %
< 3 %
9.37(5) MeV
AL
Zn-59178.6(18) msEC/β+59Cu
ε, p → 58Ni
99.9 %
0.10(3) %
9.1428(9) MeV
AL
Zn-602.38(5) minEC/β+60Cu100 %4.1708(17) MeVAL
Zn-6189.1(2) sEC/β+61Cu100 %5.635(16) MeVAL
Zn-629.193(15) hEC/β+62Cu100 %1.6195(9) MeVAL
Zn-6338.47(5) minEC/β+63Cu100 %3.3664(16) MeVAL
Zn-64stableAL
Zn-65243.93(9) dEC/β+65Cu100 %1.3516(9) MeVAL
Zn-65m1.6(6) μs53.928(10) keV
Zn-66stableAL
Zn-67stableAL
Zn-67m19.07(14) μs93.312(5) keV
Zn-67m2333(14) ns604.48(5) keV
Zn-68stableAL
Zn-6956.4(9) minβ-69Ga100 %0.9100(14) MeVAL
Zn-69m13.756(18) hIso → 69Zn
β-69Ga
99.967(3) %
0.033(3) %

438.636(18) keV
Zn-703.8 × 1018 a2 β- 70Ge100 %AL
Zn-712.45(10) minβ-71Ga100 %2.8104(28) MeVAL
Zn-71m3.96(5) hβ-71Ga
Iso → 71Zn
> 99.95 %
< 0.05 %

157.7(13) keV
Zn-7246.5(1) hβ-72Ga100 %0.4428(23) MeVAL
Zn-7324.5(2) sβ-73Ga100 %4.1059(25) MeVAL
Zn-73m113.0(2) msIso → 73Zn195.5(2) keV
Zn-73m25.8(8) sIso → 73Zn
β-73Ga


237.6(20) keV
Zn-7495.6(12) sβ-74Ga100 %2.293(4) MeVAL
Zn-7510.2(2) sβ-75Ga100 %5.906(3) MeVAL
Zn-765.7(3) sβ-76Ga100 %3.9936(24) MeVAL
Zn-772.08(5) sβ-77Ga100 %7.203(3) MeVAL
Zn-77m1.05(10) sβ-77Ga
Iso → 77Zn
66(7) %
34(7) %

772.440(15) keV
Zn-781.47(15) sβ-78Ga100 %6.2227(27) MeVAL
Zn-78m319(9) nsIso → 78Zn100 %2673.7(10) keV
Zn-79746(42) msβ-79Ga
β-, n → 78Ga
98.3 %
1.7(5) %
9.1154(29) MeV
2.2023(29) MeV
AL
Zn-80561.9(30) msβ-80Ga
β-, n → 79Ga
99 %
1.0(5) %
7.575(4) MeV
2.828(3) MeV
AL
Zn-810.32(5) sβ-81Ga
β-, n → 80Ga
92.5 %
7.5 %
11.428(6) MeV
4.953(6) MeV
AL
Zn-82166(11) msβ-82Ga
β-, n → 81Ga
31 %
69(7) %
10.617(4) MeV
7.243(4) MeV
AL
Zn-83117(20) msβ-83Ga
β-, n → 82Ga
100 %
?
12.97(30) MeV
8.57(30) MeV
AL
Zn-84633 nsβ-84Ga
β-, n → 83Ga
β-, 2n → 82Ga
?
?
?
12.16(45) MeV
9.26(40) MeV
AL
Zn-85637 nsβ-85Ga
β-, n → 84Ga
β-, 2n → 83Ga
?
?
?
14.62(58) MeV
10.79(54) MeV

 

Notes (related to the columns):

1 - nuclide, isotope symbol.
2 - Z = number of protons (atomic number).
3 - Mass number A.
4 - N = number of neutrons.
5 - Identification of the Zinc isotope.
6 - Relative atomic mass of the Zinc isotope (isotopic mass including electrons) and the mass of the atomic nucleus in square brackets (nuclear mass, nuclide mass without electrons), each related to 12C = 12.00000 [2]. In addition, the mass excess is given in MeV.
7 - Nuclear spin I, unit: h/2π.
8 - Nuclear magnetic moment μmag.
9 - Source nuclides: Possible, assumed or actual source nuclides (mother nuclides, parent nuclides). If applicable, the corresponding decay modes can be found in the data for the respective starting nuclide.
10 - Decay: Half-live of the Zinc isotope (a = years; ; d = days; h = hours; min = minutes; s = seconds).
11 - Decay: type of decay into the respective daughter nuclides with n = neutron emission; p = proton emission; α = alpha decay; β- = beta minus decay with electron emission; EC = electron capture; β+ = positron emission; ε = β+ and/or EC; Iso = isomeric transition; CD = cluster decay; SF = spontaneous decay.
12 - Decay percentage in percent (%).
13 - Decay energy; Particle energy related to decay type.
14 - AE = Excitation energy for metastable nuclei.
15 - Other information and notes: AL = Adopted Levels (link to external data [1]).

Miscellaneous:

()- Numbers in brackets: uncertainty to represent the spread of the reported value.
~ - Theoretical values or systematic trends.
  - unlisted-: Nuclides that have already been mentioned in the literature but for some reason can no longer be found in the current nuclide tables because their discovery e.g. has not confirmed.

 

NMR active Zinc nuclides

Nuclide
quantity 1)
spin
Nuclear magnetic
moment
μ/μN
Gyromagnetic
ratio
107 rad T-1 s-1
Quadrupole
moment
Q fm-2
Resonant
frequency
v0 bei 1 T
Relative
sensitivity
H0 = const.
v0 = const. 2)
67Zn
4,04(16) %
5/2-
+0,875479(9)1,6778+ 12,2(10)2,66850,00287
0,7312

1) Quantity Percentage of natural occurrence.

2) Related to 1H = 1,000.

 

Radiation Protection

According to the Radiation Protection Ordinance (StrlSchV 2018, Germany), the following values (columns 1 to 7) apply to the handling of Zinc radionuclides:

NuclideLimit ValueHASS limitSCDaughter NuclidesHalf-life
Zn-62+106 Bq100 Bq/g9.3 h
Zn-63105 Bq10 Bq/g38.4 min
Zn-65106 Bq0,1 Bq/g0,1 TBq1 Bq cm-2244.2 d
Zn-69106 Bq1000 Bq/g30 TBq100 Bq cm-256.4 min
Zn-69m+106 Bq10 Bq/g0,2 TBq10 Bq cm-213.8 h
Zn-71m106 Bq10 Bq/g4.0 h
Zn-72+106 Bq100 Bq/g46.5 h

(HASS = High-Activity Sealed Radioactive Sources; SC = surface contamination)

 

Literature Sources and References

Properties of the Zinc nucleides

[1] - NuDat: National Nuclear Data Center, Brookhaven National Laboratory, based on ENSDF and the Nuclear Wallet Cards.

[2] - G. Audi et. al.: The NUBASE evaluation of nuclear and decay properties. Nuclear Physics, (2003), DOI 10.1016/j.nuclphysa.2003.11.001.

[3] - Live Chart of Nuclides. Nuclear structure and decay data.

Zinc: NMR properties - 67Zn-NMR

[4] - N. J. Stone: Table of nuclear magnetic dipole and electric quadrupole moments. Atomic Data and Nuclear Data Tables, (2005), DOI 10.1016/j.adt.2005.04.001.

[5] - Pekka Pyykkö: Year-2008 nuclear quadrupole moments. Molecular Physics, (2008), DOI 10.1080/00268970802018367.

[6] - Pekka Pyykkö: Year-2017 nuclear quadrupole moments. Molecular Physics, (2018), DOI 10.1080/00268976.2018.1426131.

[7] - N. J. Stone: Table of recommended nuclear magnetic dipole moments. IAEA, (2019).

More sources:

[8] - Isotopic abundances, atomic weights and isotopic masses: see respective keyword.

[9] - Moritz Bigalke:
Copper and zinc stable isotope ratios as tracers of biogeochemical processes, sources and transport of Cu and Zn in soils.
In: Dissertation Biogeochemie, Universität Mainz, (2010), DOI https://nbn-resolving.de/urn:nbn:de:hebis:77-24170.

[10] - J.L. Gross, J. Claes, J. Kathawa, M. Thoennessen:
Discovery of zinc, selenium, bromine, and neodymium isotopes.
In: Atomic Data and Nuclear Data Tables, (2012), DOI 10.1016/j.adt.2011.12.001.

 


Category: Isotopes

Last update: 05.07.2020



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