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Isotopes of zinc



Naturally occurring zinc (30Zn) is composed of the 5 stable isotopes Zn, Zn, Zn, Zn, and Zn with Zn being the most abundant (48.6% natural abundance). Twenty-five radioisotopes have been characterised with the most abundant and stable being Zn with a half-life of 244.26 days, and Zn with a half-life of 46.5 hours. All of the remaining radioactive isotopes have half-lives that are less than 14 hours and the majority of these have half-lives that are less than 1 second. This element also has 10 meta states.

Zinc has been proposed as a "salting" material for nuclear weapons. A jacket of isotopically enriched Zn, irradiated by the intense high-energy neutron flux from an exploding thermonuclear weapon, would transmute into the radioactive isotope Zn with a half-life of 244 days and produce approximately 1.115 MeV of gamma radiation, significantly increasing the radioactivity of the weapon's fallout for several years. Such a weapon is not known to have ever been built, tested, or used.

List of isotopes



|- | Zn | style="text-align:right" | 30 | style="text-align:right" | 24 | 53.99295(43)# | | 2p | Ni | 0+ | | |- | rowspan=2|Zn | rowspan=2 style="text-align:right" | 30 | rowspan=2 style="text-align:right" | 25 | rowspan=2|54.98398(27)# | rowspan=2|20# ms [>1.6 μs] | 2p | Ni | rowspan=2|5/2−# | rowspan=2| | rowspan=2| |- | β | Cu |- | Zn | style="text-align:right" | 30 | style="text-align:right" | 26 | 55.97238(28)# | 36(10) ms | β | Cu | 0+ | | |- | rowspan=2|Zn | rowspan=2 style="text-align:right" | 30 | rowspan=2 style="text-align:right" | 27 | rowspan=2|56.96479(11)# | rowspan=2|38(4) ms | β, p (65%) | Ni | rowspan=2|7/2−# | rowspan=2| | rowspan=2| |- | β (35%) | Cu |- | rowspan=2|Zn | rowspan=2 style="text-align:right" | 30 | rowspan=2 style="text-align:right" | 28 | rowspan=2|57.95459(5) | rowspan=2|84(9) ms | β, p (60%) | Ni | rowspan=2|0+ | rowspan=2| | rowspan=2| |- | β (40%) | Cu |- | rowspan=2|Zn | rowspan=2 style="text-align:right" | 30 | rowspan=2 style="text-align:right" | 29 | rowspan=2|58.94926(4) | rowspan=2|182.0(18) ms | β (99%) | Cu | rowspan=2|3/2− | rowspan=2| | rowspan=2| |- | β, p (1%) | Ni |- | Zn | style="text-align:right" | 30 | style="text-align:right" | 30 | 59.941827(11) | 2.38(5) min | β | Cu | 0+ | | |- | Zn | style="text-align:right" | 30 | style="text-align:right" | 31 | 60.939511(17) | 89.1(2) s | β | Cu | 3/2− | | |- | style="text-indent:1em" | Zn | colspan="3" style="text-indent:2em" | 88.4(1) keV | <430 ms | | | 1/2− | | |- | style="text-indent:1em" | Zn | colspan="3" style="text-indent:2em" | 418.10(15) keV | 140(70) ms | | | 3/2− | | |- | style="text-indent:1em" | Zn | colspan="3" style="text-indent:2em" | 756.02(18) keV | <130 ms | | | 5/2− | | |- | Zn | style="text-align:right" | 30 | style="text-align:right" | 32 | 61.934330(11) | 9.186(13) h | β | Cu | 0+ | | |- | Zn | style="text-align:right" | 30 | style="text-align:right" | 33 | 62.9332116(17) | 38.47(5) min | β | Cu | 3/2− | | |- | Zn | style="text-align:right" | 30 | style="text-align:right" | 34 | 63.9291422(7) | colspan=3 align=center|Observationally Stable | 0+ | 0.4917(75) | |- | Zn | style="text-align:right" | 30 | style="text-align:right" | 35 | 64.9292410(7) | 243.66(9) d | β | Cu | 5/2− | | |- | style="text-indent:1em" | Zn | colspan="3" style="text-indent:2em" | 53.928(10) keV | 1.6(6) μs | | | (1/2)− | | |- | Zn | style="text-align:right" | 30 | style="text-align:right" | 36 | 65.9260334(10) | colspan=3 align=center|Stable | 0+ | 0.2773(98) | |- | Zn | style="text-align:right" | 30 | style="text-align:right" | 37 | 66.9271273(10) | colspan=3 align=center|Stable | 5/2− | 0.0404(16) | |- | Zn | style="text-align:right" | 30 | style="text-align:right" | 38 | 67.9248442(10) | colspan=3 align=center|Stable | 0+ | 0.1845(63) | |- | Zn | style="text-align:right" | 30 | style="text-align:right" | 39 | 68.9265503(10) | 56.4(9) min | β | Ga | 1/2− | | |- | rowspan=2 style="text-indent:1em" | Zn | rowspan=2 colspan="3" style="text-indent:2em" | 438.636(18) keV | rowspan=2|13.76(2) h | IT (96.7%) | Zn | rowspan=2|9/2+ | rowspan=2| | rowspan=2| |- | β (3.3%) | Ga |- | Zn | style="text-align:right" | 30 | style="text-align:right" | 40 | 69.9253193(21) | colspan=3 align=center|Observationally Stable | 0+ | 0.0061(10) | |- | Zn | style="text-align:right" | 30 | style="text-align:right" | 41 | 70.927722(11) | 2.45(10) min | β | Ga | 1/2− | | |- | rowspan=2 style="text-indent:1em" | Zn | rowspan=2 colspan="3" style="text-indent:2em" | 157.7(13) keV | rowspan=2|3.96(5) h | β (99.95%) | Ga | rowspan=2|9/2+ | rowspan=2| | rowspan=2| |- | IT (.05%) | Zn |- | Zn | style="text-align:right" | 30 | style="text-align:right" | 42 | 71.926858(7) | 46.5(1) h | β | Ga | 0+ | | |- | Zn | style="text-align:right" | 30 | style="text-align:right" | 43 | 72.92978(4) | 23.5(10) s | β | Ga | (1/2)− | | |- | style="text-indent:1em" | Zn | colspan="3" style="text-indent:2em" | 195.5(2) keV | 13.0(2) ms | | | (5/2+) | | |- | rowspan=2 style="text-indent:1em" | Zn | rowspan=2 colspan="3" style="text-indent:2em" | 237.6(20) keV | rowspan=2|5.8(8) s | β | Ga | rowspan=2|(7/2+) | rowspan=2| | rowspan=2| |- | IT | Zn |- | Zn | style="text-align:right" | 30 | style="text-align:right" | 44 | 73.92946(5) | 95.6(12) s | β | Ga | 0+ | | |- | Zn | style="text-align:right" | 30 | style="text-align:right" | 45 | 74.93294(8) | 10.2(2) s | β | Ga | (7/2+)# | | |- | Zn | style="text-align:right" | 30 | style="text-align:right" | 46 | 75.93329(9) | 5.7(3) s | β | Ga | 0+ | | |- | Zn | style="text-align:right" | 30 | style="text-align:right" | 47 | 76.93696(13) | 2.08(5) s | β | Ga | (7/2+)# | | |- | rowspan=2 style="text-indent:1em" | Zn | rowspan=2 colspan="3" style="text-indent:2em" | 772.39(12) keV | rowspan=2|1.05(10) s | IT (50%) | Zn | rowspan=2|1/2−# | rowspan=2| | rowspan=2| |- | β (50%) | Ga |- | Zn | style="text-align:right" | 30 | style="text-align:right" | 48 | 77.93844(10) | 1.47(15) s | β | Ga | 0+ | | |- | style="text-indent:1em" | Zn | colspan="3" style="text-indent:2em" | 2673(1) keV | 319(9) ns | | | (8+) | | |- | rowspan=2|Zn | rowspan=2 style="text-align:right" | 30 | rowspan=2 style="text-align:right" | 49 | rowspan=2|78.94265(28)# | rowspan=2|0.995(19) s | β (98.7%) | Ga | rowspan=2|(9/2+) | rowspan=2| | rowspan=2| |- | β, n (1.3%) | Ga |- | rowspan=2|Zn | rowspan=2 style="text-align:right" | 30 | rowspan=2 style="text-align:right" | 50 | rowspan=2|79.94434(18) | rowspan=2|545(16) ms | β (99%) | Ga | rowspan=2|0+ | rowspan=2| | rowspan=2| |- | β, n (1%) | Ga |- | rowspan=2|Zn | rowspan=2 style="text-align:right" | 30 | rowspan=2 style="text-align:right" | 51 | rowspan=2|80.95048(32)# | rowspan=2|290(50) ms | β (92.5%) | Ga | rowspan=2|5/2+# | rowspan=2| | rowspan=2| |- | β, n (7.5%) | Ga |- | Zn | style="text-align:right" | 30 | style="text-align:right" | 52 | 81.95442(54)# | 100# ms [>300 ns] | β | Ga | 0+ | | |- | Zn | style="text-align:right" | 30 | style="text-align:right" | 53 | 82.96103(54)# | 80# ms [>300 ns] | | | 5/2+# | |