# Liste der Isotope/Ordnungszahl 11 bis Ordnungszahl 20

Liste der Isotope ist die Übersichtsseite, um komfortabel auf alle Elemente zugreifen zu können. Dort wird auch der Aufbau erklärt und die Legende zur Tabelle ist auch dort zu finden. Zerfallsenergien wurden mit den angegebenen Massen und dem Masse-Energie-Äquivalent von $\textstyle \Delta m=931{,}4940954{\frac {\mathrm {MeV} }{\mathrm {u} }}$ neu berechnet.

## $_{11}$ Natrium

| Iso­top | Halbwerts­zeit | Zerfallsenergie (MeV) | Spin / Parität | Zerfallsart(en) (%) | NH (%) | Masse (u) |
| $^{18}$Na | 1,3·10$^{−21}$ s | 1,249 | 1− | p | | 18,026 88(12) |
| $^{19}$Na | < 40 ns | 0,3225 | 5/2+ | p | | 19,013 880(11) |
| $^{20}$Na | 447,9 ms | 13,893 (β$^+$), 9,163 (β$^+$α) | 2+ | β$^+$ = 79,95, β$^+$α = 20,05 | | 20,007 3544(12) |
| $^{21}$Na | 22,49 s | 3,547 | 3/2+ | β$^+$ | | 20,997 654 69(30) |
| $^{22}$Na | 2,6027 a | 2,843 | 3+ | β$^+$ | | 21,994 437 41(18) |
| $^{22m1}$Na | 244 ns | 0,5825 | 1+ | IT | | 21,995 062 77 |
| $^{23}$Na | stabil | | 3/2+ | | 100 | 22,989 769 2820(19) |
| $^{24}$Na | 14,997 h | 5,5156 | 4+ | β$^−$ | | 23,990 962 950(38) |
| $^{24m1}$Na | 20,18 ms | 0,472 (IT), 5,988 (β$^−$) | 1+ | IT = 99,95, β$^−$ = 0,05 | | 23,991 469 83 |
| $^{25}$Na | 59,1 s | 3,835 | 5/2+ | β$^−$ | | 24,989 9540(13) |
| $^{26}$Na | 1,07128 s | 9,353 | 3+ | β$^−$ | | 25,992 6346(38) |
| $^{27}$Na | 301 ms | 9,069 (β$^−$), 2,626 (β$^−$n) | 5/2+ | β$^−$ = 99,87, β$^−$n = 0,13 | | 26,994 0765(40) |
| $^{28}$Na | 30,5 ms | 14,03 (β$^−$), 5,527 (β$^−$n) | 1+ | β$^−$ = 99,42, β$^−$n = 0,58 | | 27,998 939(11) |
| $^{29}$Na | 44,9 ms | 13,283 (β$^−$), 9,627 (β$^−$n) | 3/2+ | β$^−$ = 78,5, β$^−$n = 21,5 | | 29,002 8771(79) |
| $^{30}$Na | 48 ms | 17,358 (β$^−$), 11,007 (β$^−$n), 7,351 (β$^−$2n), 5,57 (β$^−$α) | 2+ | β$^−$ = 68,85, β$^−$n = 30, β$^−$2n = 1,17, β$^−$α = 5,5·10$^{−5}$ | | 30,009 0979(51) |
| $^{31}$Na | 17 ms | 15,384 (β$^−$), 13,074 (β$^−$n), 6,722 (β$^−$2n), 3,066 (β$^−$3n) | 3/2+ | β$^−$ = 61,93, β$^−$n = 37, β$^−$2n = 0,87, β$^−$3n = 0,2 | | 31,013 163(25) |
| $^{32}$Na | 13,2 ms | 19,636 (β$^−$), 13,858 (β$^−$n), 11,548 (β$^−$2n) | 3− | β$^−$ = 68, β$^−$n = 24, β$^−$2n = 8 | | 32,020 19(13) |
| $^{33}$Na | 8 ms | 19,005 (β$^−$), 16,725 (β$^−$n), 10,947 (β$^−$2n) | 3/2+ | β$^−$ = 40, β$^−$n = 47, β$^−$2n = 13 | | 33,025 73(64#) |
| $^{34}$Na | 5,5 ms | 22,966 (β$^−$), 18,255 (β$^−$n), 15,975 (β$^−$2n) | | β$^−$ = 35, β$^−$n ≈ 15, β$^−$2n ≈ 50 | | 34,033 59(54#) |
| $^{35}$Na | 1,5 ms | 22,198 (β$^−$), 21,443 (β$^−$n) | | β$^−$ = 50, β$^−$n = 50 | | 35,040 62(63#) |
| $^{36}$Na | < 180 ns | 0,00474 | 1+ | n | | 36,049 29(64#) |
| $^{37}$Na | > 60 ns | 24,852 (β$^−$), 24,689 (β$^−$n) | 3/2+ | β$^−$ = ?, β$^−$n = ? | | 37,057 05(65#) |
| $^{39}$Na | 1 ms | | 3/2+ | | | 39,07512(80) |

## $_{12}$ Magnesium

| Iso­top | Halbwerts­zeit | Zerfallsenergie (MeV) | Spin / Parität | Zerfallsart(en) (%) | NH (%) | Masse (u) |
| $^{19}$Mg | 4 ps | 0,7498 | 1/2− | 2p | | 19,034 169(54) |
| $^{20}$Mg | 90,8 ms | 10,708 (β$^+$), 8,518 (β$^+$p) | 0+ | β$^+$ = 73, β$^+$p = 27 | | 20,018 850(29) |
| $^{21}$Mg | 122 ms | 13,098 (β$^+$), 10,666 (β$^+$p), 6,537 (β$^+$α) | 5/2+ | β$^+$ = 66,9, β$^+$p = 32,6, β$^+$α = 0,5 | | 21,011 716(18) |
| $^{22}$Mg | 3,8755 s | 4,782 | 0+ | β$^+$ | | 21,999 570 65(34) |
| $^{23}$Mg | 11,317 s | 4,057 | 5/2+ | ε | | 22,994 124 21(74) |
| $^{23m1}$Mg | 15·10$^{−15}$ s | 9,596 (IT), 2,016 (p) | 3/2+ | IT = ?, p = ? | | 23,004 426 22 |
| $^{24}$Mg | stabil | | 0+ | | 078,99 | 23,985 041 697(14) |
| $^{25}$Mg | stabil | | 5/2+ | | 010,00 | 24,985 836 976(50) |
| $^{26}$Mg | stabil | | 0+ | | 011,01 | 25,982 592 968(31) |
| $^{27}$Mg | 9,458 min | 2,61 | 1/2+ | β$^−$ | | 26,984 340 624(53) |
| $^{28}$Mg | 20,915 h | 1,832 | 0+ | β$^−$ | | 27,983 8767(22) |
| $^{29}$Mg | 1,3 s | 7,601 | 3/2+ | β$^−$ | | 28,988 617(12) |
| $^{30}$Mg | 335 ms | 6,989 | 0+ | β$^−$ | | 29,990 4629(37) |
| $^{31}$Mg | 232 ms | 11,833 (β$^−$), 4,679 (β$^−$n) | 1/2+ | β$^−$ = 98,3, β$^−$n = 1,7 | | 30,996 6480(33) |
| $^{32}$Mg | 86 ms | 10,27 (β$^−$), 6,055 (β$^−$n) | 0+ | β$^−$ = 94,5, β$^−$n = 5,5 | | 31,999 1102(34) |
| $^{33}$Mg | 90,5 ms | 13,43 (β$^−$), 7,99 (β$^−$n) | 3/2+ | β$^−$ = 83, β$^−$n = 17 | | 33,005 3271(31) |
| $^{34}$Mg | 20 ms | 11,392 (β$^−$), 8,72 (β$^−$n) | 0+ | β$^−$ = 90, β$^−$n = 10 | | 34,008 935(31) |
| $^{35}$Mg | 70 ms | 15,86 (β$^−$), 10,638 (β$^−$n) | 7/2− | β$^−$ = 48, β$^−$n = 52 | | 35,016 79(19) |
| $^{36}$Mg | 3,9 ms | 14,429 (β$^−$), 12,53 (β$^−$n) | 0+ | β$^−$ = 60, β$^−$n = 40 | | 36,021 88(49) |
| $^{37}$Mg | 40 ms | 18,48 (β$^−$), 14,266 (β$^−$n) | 7/2− | β$^−$ < 100, β$^−$n = ? | | 37,030 37(54#) |
| $^{38}$Mg | 1 ms | 17,866 (β$^−$), 16,194 (β$^−$n) | 0+ | β$^−$ = ?, β$^−$n = ? | | 38,036 58(54#) |
| $^{39}$Mg | < 180 ns | 0,1258 | 7/2− | n | | 39,045 38(55#) |
| $^{40}$Mg | 1 ms | 20,633 (β$^−$), 19,538 (β$^−$n) | 0+ | β$^−$ = ?, β$^−$n = ? | | 40,052 18(64#) |

## $_{13}$ Aluminium

| Iso­top | Halbwerts­zeit | Zerfallsenergie (MeV) | Spin / Parität | Zerfallsart(en) (%) | NH (%) | Masse (u) |
| $^{21}$Al | 100 ps | 2,318 | 5/2+ | p | | 21,028 97(43#) |
| $^{22}$Al | 91,1 ms | 18,601 (β$^+$), 13,097 (εp), 10,665 (ε2p), 10,459 (εα) | 3+ | β$^+$ = 44,36, εp =54,5, ε2p =1,1, εα = 0,04 | | 22,019 54(43#) |
| $^{23}$Al | 446 ms | 12,221 (β$^+$), 4,641 (β$^+$p) | 5/2+ | β$^+$ = 99,53, β$^+$p = 0,47 | | 23,007 244 35(37) |
| $^{23m1}$Al | 6,2·10$^{−18}$ s | 0,43 (p), 0,571 (IT) | 1/2+ | p ≈ 100, IT = 8,5·10$^{−7}$ | | 23, 007 857 27 |
| $^{24}$Al | 2,053 s | 13,886 (β$^+$), 2,193 (εp), 4,569 (εα) | 4+ | β$^+$ = 99,96, εp = 0,0016, εα = 0,0384 | | 23,999 9489(12) |
| $^{24m1}$Al | 130 ms | 0,417 (IT), 14,303 (β$^+$), 4,987 (εα) | 1+ | IT = 82,5, β$^+$ = 17,47, εα = 0,03 | | 24,000 397 |
| $^{25}$Al | 7,183 s | 4,277 | 5/2+ | β$^+$ | | 24,990 428 10(51) |
| $^{26}$Al | 7,17·10$^5$ a | 4,004 | 5+ | ε | | 25,986 891 904(69) |
| $^{26m1}$Al | 6,3464 s | 4,233 | 0+ | ε | | 25,987 136 79 |
| $^{27}$Al | stabil | | 5/2+ | | 100 | 26,981 538 53(11) |
| $^{28}$Al | 2,2414 min | 4,642 | 3+ | β$^−$ | | 27,981 910 21(13) |
| $^{29}$Al | 6,56 min | 3,69 | 5/2+ | β$^−$ | | 28,980 4565(10) |
| $^{30}$Al | 3,62 s | 8,56 | 3+ | β$^−$ | | 29,982 960(15) |
| $^{31}$Al | 644 ms | 7,994 | 5/2+ | β$^−$ | | 30,983 945(22) |
| $^{32}$Al | 33 ms | 12,979 | 1+ | β$^−$ | | 31,988 085(13) |
| $^{32m1}$Al | 200 ns | 0,99435 | 4+ | IT | | 31,989 152 48 |
| $^{33}$Al | 41,7 ms | 12,046 (β$^−$), 7,538 (β$^−$n) | 5/2+ | β$^−$ = 91,5, β$^−$n = 8,5 | | 32,990 909(81) |
| $^{34}$Al | 42 ms | 16,887 (β$^−$), 9,374 (β$^−$n) | 4− | β$^−$ = 73, β$^−$n = 27 | | 33,996 705(74) |
| $^{35}$Al | 37,2 ms | 14,141 (β$^−$), 11,665 (β$^−$n) | 5/2+ | β$^−$ = 59, β$^−$n = 41 | | 34,999 764(75) |
| $^{36}$Al | 90 ms | 18,346 (β$^−$), 12,242 (β$^−$n) | | β$^−$ = 70, β$^−$n = 30 | | 36,006 39(11) |
| $^{37}$Al | 10,7 ms | 16,403 (β$^−$), 14,131 (β$^−$n) | | β$^−$ = 85, β$^−$n = 15 | | 37,010 53(13) |
| $^{38}$Al | 7,6 ms | 20,378 (β$^−$), 14,731 (β$^−$n) | | β$^−$ = ?, β$^−$n = ? | | 38,017 40(27) |
| $^{39}$Al | 7,6 ms | 18,676 (β$^−$), 17,095 (β$^−$n) | | β$^−$ = ?, β$^−$n = ? | | 39,022 54(54#) |
| $^{40}$Al | > 260 ns | 22,542 (β$^−$), 17,581 (β$^−$n) | | β$^−$ = ?, β$^−$n = ? | | 40,030 03(54#) |
| $^{41}$Al | > 260 ns | 21,769 (β$^−$), 20,386 (β$^−$n) | | β$^−$ = ?, β$^−$n = ? | | 41,036 38(64#) |
| $^{42}$Al | > 170 ns | 24,275 (β$^−$), 20,647 (β$^−$n) | | β$^−$ = ?, β$^−$n = ? | | 42,043 84(64#) |
| $^{43}$Al | > 170 ns | 24,843 (β$^−$), 23,311 (β$^−$n) | | β$^−$ = ?, β$^−$n = ? | | 43,051 47(75#) |

## $_{14}$ Silicium

| Iso­top | Halbwerts­zeit | Zerfallsenergie (MeV) | Spin / Parität | Zerfallsart(en) (%) | NH (%) | Masse (u) |
| $^{22}$Si | 29 ms | 15,137 (β$^+$), 15,136 (εp) | 0+ | β$^+$ = 68, εp = 32 | | 22,035 79(54#) |
| $^{23}$Si | 42,3 ms | 16,949 (β$^+$), 16,808 (εp), 11,304 (ε2p) | 5/2+ | β$^+$ = 25,4, εp = 71, ε2p = 3,6 | | 23,025 44(54#) |
| $^{24}$Si | 140,5 ms | 10,792 (β$^+$), 8,929 (εp) | 0+ | β$^+$ = 62, εp = 38 | | 24,011 535(21) |
| $^{25}$Si | 220 ms | 12,744 (β$^+$), 10,472 (β$^+$p) | 5/2+ | β$^+$ = 65, β$^+$p = 35 | | 25,004 109(11) |
| $^{26}$Si | 2,229 s | 5,069 | 0+ | β$^+$ | | 25,992 333 84(11) |
| $^{27}$Si | 4,15 s | 4,812 | 5/2+ | ε | | 26,986 704 81(15) |
| $^{28}$Si | stabil | | 0+ | | 092,223 | 27,976 926 534 65(44) |
| $^{29}$Si | stabil | | 1/2+ | | 004,685 | 28,976 494 664 90(52) |
| $^{30}$Si | stabil | | 0+ | | 003,092 | 29,973 770 136(23) |
| $^{31}$Si | 157,3 min | 1,492 | 3/2+ | β$^−$ | | 30,975 363 194(46) |
| $^{32}$Si | 153 a | 0,227 | 0+ | β$^−$ | | 31,974 151 54(32) |
| $^{33}$Si | 6,11 s | 5,823 | 3/2+ | β$^−$ | | 32,977 976 96(75) |
| $^{34}$Si | 2,77 s | 4,592 | 0+ | β$^−$ | | 33,978 576(15) |
| $^{35}$Si | 0,78 s | 10,197 | 7/2− | β$^−$ | | 34,984 583(41) |
| $^{36}$Si | 0,45 s | 7,857 (β$^−$), 4,393 (β$^−$n) | 0+ | β$^−$ > 90, β$^−$n < 10 | | 35,986 695(77) |
| $^{37}$Si | 90 ms | 12,402 (β$^−$), 5,585 (β$^−$n) | 7/2− | β$^−$ = 83, β$^−$n = 17 | | 36,992 921(89) |
| $^{38}$Si | > 1 μs | 10,499 (β$^−$), 6,754 (β$^−$n) | 0+ | β$^−$ = ?, β$^−$n = ? | | 37,995 523(75) |
| $^{39}$Si | 47,5 ms | 15,15 (β$^−$), 8,918 (β$^−$n) | 5/2− | β$^−$ = ?, β$^−$n = ? | | 39,002 491(97) |
| $^{40}$Si | 33 ms | 13,507 (β$^−$), 10,189 (β$^−$n) | 0+ | β$^−$ = ?, β$^−$n = ? | | 40,005 83(25) |
| $^{41}$Si | 20 ms | 17,099 (β$^−$), 12,123 (β$^−$n) | | β$^−$ = ?, β$^−$n = ? | | 41,013 01(40) |
| $^{42}$Si | 12,5 ms | 15,556 (β$^−$), 13,47 (β$^−$n) | 0+ | β$^−$ = ?, β$^−$n = ? | | 42,017 78(54#) |
| $^{43}$Si | > 60 ns | 18,425 (β$^−$), 14,024 (β$^−$n) | | β$^−$ = ?, β$^−$n = ? | | 43,024 80(64#) |
| $^{44}$Si | > 360 ns | 18,071 (β$^−$), 15,766 (β$^−$n) | 0+ | β$^−$ = ?, β$^−$n = ? | | 44,030 61(64#) |
| $^{45}$Si | | | | | | 45,039 95(75#) |

## $_{15}$ Phosphor

| Iso­top | Halbwerts­zeit | Zerfallsenergie (MeV) | Spin / Parität | Zerfallsart(en) (%) | NH (%) | Masse (u) |
| $^{24}$P | | 2,333 | 1+ | p | | 24,035 77(54#) |
| $^{25}$P | < 30 ns | 1,705 | 1/2+ | p | | 25,021 19(43#) |
| $^{26}$P | 43,7 ms | 18,112 (ε), 12,6 (εp), 1,329 (β$^+$2p) | 3+ | ε = 61,04, εp = 36,8, β$^+$2p = 2,16 | | 26,011 78(21#) |
| $^{27}$P | 260 ms | 11,662 (β$^+$), 4,199 (β$^+$p) | 1/2+ | β$^+$ = 99,93, β$^+$p = 0,07 | | 26,999 224(28) |
| $^{28}$P | 270,3 ms | 14,345 (ε), 2,76 (β$^+$p), 4,361 (β$^+$α) | 3+ | ε = 99,999, β$^+$p = 1,3·10$^{−3}$, β$^+$α = 8,6·10$^{−4}$ | | 27,992 3266(12) |
| $^{29}$P | 4,142 s | 4,943 | 1/2+ | β$^+$ | | 28,981 800 79(60) |
| $^{30}$P | 2,498 min | 4,232 | 1+ | β$^+$ | | 29,978 313 75(34) |
| $^{31}$P | stabil | | 1/2+ | | 100 | 30,973 761 998 42(70) |
| $^{32}$P | 14,262 d | 1,711 | 1+ | β$^−$ | | 31,973 907 643(42) |
| $^{33}$P | 25,35 d | 0,249 | 1/2+ | β$^−$ | | 32,971 7257(12) |
| $^{34}$P | 12,43 s | 5,383 | 1+ | β$^−$ | | 33,973 645 89(87) |
| $^{35}$P | 47,3 s | 3,989 | 1/2+ | β$^−$ | | 34,973 3141(20) |
| $^{36}$P | 5,6 s | 10,413 | 4− | β$^−$ | | 35,978 260(14) |
| $^{37}$P | 2,31 s | 7,9 | 1/2+ | β$^−$ | | 36,979 607(41) |
| $^{38}$P | 0,64 s | 12,192 (β$^−$), 4,156 (β$^−$n) | 4− | β$^−$ = 88, β$^−$n = 12 | | 37,984 252(93) |
| $^{39}$P | 0,28 s | 10,333 (β$^−$), 5,96 (β$^−$n) | 1/2+ | β$^−$ = 74, β$^−$n = 26 | | 38,986 227(98) |
| $^{40}$P | 125 ms | 14,762 (β$^−$), 7,015 (β$^−$n) | 2− | β$^−$ = 84,2, β$^−$n = 15,8 | | 39,991 33(12) |
| $^{41}$P | 100 ms | 14,029 (β$^−$), 9,787 (β$^−$n) | 1/2+ | β$^−$ = 70, β$^−$n = 30 | | 40,994 654(86) |
| $^{42}$P | 48,5 ms | 18,644 (β$^−$), 11,943 (β$^−$n) | | β$^−$ = 50, β$^−$n = 50 | | 42,001 08(23) |
| $^{43}$P | 36,5 ms | 14,246 | 1/2+ | β$^−$n | | 43,005 02(40) |
| $^{44}$P | 18,5 ms | 19,646 (β$^−$), 14,566 (β$^−$n) | 3/2− | β$^−$ = ?, β$^−$n = ? | | 44,011 21(54#) |
| $^{45}$P | > 200 ns | 19,31 | | β$^−$ | | 45,016 45(64#) |
| $^{46}$P | > 200 ns | 22,747 | | β$^−$ | | 46,024 46(75#) |
| $^{47}$P | | | | | | 47,031 39(86#) |

## $_{16}$ Schwefel

| Iso­top | Halbwerts­zeit | Zerfallsenergie (MeV) | Spin / Parität | Zerfallsart(en) (%) | NH (%) | Masse (u) |
| $^{26}$S | 79 ns | 1,756 | 0+ | 2p | | 26,029 07(64#) |
| $^{27}$S | 15,5 ms | 17,751 (β$^+$), 16,88 (β$^+$p), 11,366 (β$^+$2p) | 5/2+ | β$^+$ = 96,6, β$^+$p = 2,3, β$^+$2p = 1,1 | | 27,018 28(43#) |
| $^{28}$S | 125 ms | 11,218 (β$^+$), 9,167 (β$^+$p) | 0+ | β$^+$ = 79,3, β$^+$p = 20,7 | | 28,004 37(17) |
| $^{29}$S | 187 ms | 13,796 (β$^+$), 11,047 (β$^+$p) | 5/2+ | β$^+$ = 53, β$^+$p = 47 | | 28,996 611(54) |
| $^{30}$S | 1,178 s | 6,142 | 0+ | β$^+$ | | 29,984 907 03(40) |
| $^{31}$S | 2,572 s | 5,398 | 1/2+ | ε | | 30,979 557 01(25) |
| $^{32}$S | stabil | | 0+ | | 094,99 | 31,972 071 1744(14) |
| $^{33}$S | stabil | | 3/2+ | | 000,75 | 32,971 458 9098(15) |
| $^{34}$S | stabil | | 0+ | | 004,25 | 33,967 867 004(47) |
| $^{35}$S | 87,37 d | 0,167 | 3/2+ | β$^−$ | | 34,969 032 310(43) |
| $^{36}$S | stabil | | 0+ | | 000,01 | 35,967 080 71(20) |
| $^{37}$S | 5,05 min | 4,865 | 7/2− | β$^−$ | | 36,971 125 51(21) |
| $^{38}$S | 170,3 min | 2,937 | 0+ | β$^−$ | | 37,971 1633(77) |
| $^{39}$S | 11,5 s | 6,638 | 7/2− | β$^−$ | | 38,975 134(54) |
| $^{40}$S | 8,8 s | 4,72 | 0+ | β$^−$ | | 39,975 4826(43) |
| $^{41}$S | 1,99 s | 8,298 | 7/2− | β$^−$ | | 40,979 5935(44) |
| $^{42}$S | 1,03 s | 7,278 (β$^−$) | 0+ | β$^−$ | | 41,981 0651(30) |
| $^{43}$S | 0,28 s | 12,126 (β$^−$), 4,651 (β$^−$n) | 3/2− | β$^−$ = 60, β$^−$n = 40 | | 42,986 9076(53) |
| $^{43m1}$S | 480 ns | 0,54929 | 7/2− | IT | | 42,987 497 29 |
| $^{44}$S | 100 ms | 11,41 (β$^−$), 7,046 (β$^−$n) | 0+ | β$^−$ = 82, β$^−$n = 18 | | 43,990 1188(56) |
| $^{45}$S | 68 ms | 14,373 (β$^−$), 8,556 (β$^−$n) | | β$^−$ = 46, β$^−$n = 54 | | 44,995 72(74) |
| $^{46}$S | 50 ms | 13,851 | 0+ | β$^−$ | | 46,000 04(54#) |
| $^{47}$S | 20 ms | 17,503 (β$^−$), 13,148 (β$^−$n) | 3/2− | β$^−$ = ?, β$^−$n = ? | | 47,007 95(54#) |
| $^{48}$S | > 200 ns | 16,823 | 0+ | β$^−$ | | 48,013 70(64#) |
| $^{49}$S | < 200 ns | 0,36802 | 3/2− | n | | 49,022 76(72#) |

## $_{17}$ Chlor

| Iso­top | Halbwerts­zeit | Zerfallsenergie (MeV) | Spin / Parität | Zerfallsart(en) (%) | NH (%) | Masse (u) |
| $^{28}$Cl | | 3,12 | 1+ | p | | 28,029 54(64#) |
| $^{29}$Cl | < 20 ns | 2,408 | 3/2+ | p | | 29,014 78(43#) |
| $^{30}$Cl | < 30 ns | 0,31109 | 3+ | p | | 30,004 77(21#) |
| $^{31}$Cl | 150 ms | 11,976 (ε), 5,845 (β$^+$p) | 3/2+ | ε = 99,3, β$^+$p = 0,7 | | 30,992 414(54) |
| $^{32}$Cl | 298 ms | 12,681 (ε), 3,817 (εp), 5,733 (β$^+$α) | 1+ | ε = 99,92, εp = 0,3, β$^+$α = 0,05 | | 31,985 684 64(60) |
| $^{33}$Cl | 2,511 s | 5,583 | 3/2+ | ε | | 32,977 451 99(42) |
| $^{34}$Cl | 1,5264 s | 5,492 | 0+ | ε | | 33,973 762 485(52) |
| $^{34m1}$Cl | 32 min | 5,639 (ε), 0,14749 (IT) | 3+ | ε = 55,4, IT = 44,6 | | 33,973 920 82 |
| $^{35}$Cl | stabil | | 3/2+ | | 075,76 | 34,968 852 682(37) |
| $^{36}$Cl | 3,01·10$^5$ a | 0,70952 (β$^−$), 1,142 (ε) | 2+ | β$^−$ = 98,1, ε = 1,9 | | 35,968 306 809(38) |
| $^{37}$Cl | stabil | | 3/2+ | | 024,24 | 36,965 902 602(55) |
| $^{38}$Cl | 37,24 min | 4,917 | 2− | β$^−$ | | 37,968 010 44(11) |
| $^{38m1}$Cl | 715 ms | 0,671 | 5− | IT | | 37,968 731 31 |
| $^{39}$Cl | 55,6 min | 3,422 | 3/2+ | β$^−$ | | 38,968 0082(19) |
| $^{40}$Cl | 1,35 min | 7,482 | 2− | β$^−$ | | 39,970 415(34) |
| $^{41}$Cl | 38,4 s | 5,761 | 1/2+ | β$^−$ | | 40,970 685(74) |
| $^{42}$Cl | 6,8 s | 9,505 | 2− | β$^−$ | | 41,973 25(15) |
| $^{43}$Cl | 3,13 s | 7,688 | 1/2+ | β$^−$ | | 42,973 89(10) |
| $^{44}$Cl | 0,56 s | 12,059 (β$^−$), 3,325 (β$^−$n) | 2− | β$^−$ = 92, β$^−$n = 8 | | 43,977 87(20) |
| $^{45}$Cl | 413 ms | 11,411 (β$^−$), 6,242 (β$^−$n) | 1/2+ | β$^−$ = 76, β$^−$n = 24 | | 44,980 29(11) |
| $^{46}$Cl | 232 ms | 15,916 (β$^−$), 7,885 (β$^−$n) | 2− | β$^−$ = 40, β$^−$n = 60 | | 45,985 17(17) |
| $^{47}$Cl | 101 ms | 15,113 (β$^−$), 11,562 (β$^−$n) | | β$^−$ > 97, β$^−$n < 3 | | 46,989 16(43#) |
| $^{48}$Cl | > 200 ns | 18,378 | | β$^−$ | | 47,995 64(54#) |
| $^{49}$Cl | > 170 ns | 18,006 | | β$^−$ | | 49,001 23(64#) |
| $^{50}$Cl | 20 ms | 21,35 (β$^−$), 17,219 (β$^−$n) | | β$^−$ = ?, β$^−$n = ? | | 50,009 05(64#) |
| $^{51}$Cl | > 200 ns | 20,344 | 3/2+ | β$^−$ | | 51,015 54(75#) |

## $_{18}$ Argon

| Iso­top | Halbwerts­zeit | Zerfallsenergie (MeV) | Spin / Parität | Zerfallsart(en) (%) | NH (%) | Masse (u) |
| $^{30}$Ar | 20 ns | 0,43311 | 0+ | p | | 30,023 07(54#) |
| $^{31}$Ar | 14,4 ms | 18,4 (ε), 18,3 (β$^+$p), 13,7 (β$^+$2p), 10,9 (β$^+$3p), 9,6 (εα), 8,72 (εpα) | 5/2+ | ε = 29,39, β$^+$p = 63, β$^+$2p = 7,2, β$^+$3p = 0,001, εα = 0,03, εpα = 0,38 | | 31,012 12(22#) |
| $^{32}$Ar | 100,5 ms | 11,134 (ε), 9,553 (εp) | 0+ | ε = 57, εp = 43 | | 31,997 6378(19) |
| $^{33}$Ar | 173 ms | 11,619 (ε), 9,342 (εp) | 1/2+ | ε = 61,3, εp = 38,7 | | 32,989 925 55(43) |
| $^{34}$Ar | 844,5 ms | 6,062 | 0+ | ε | | 33,980 270 090(83) |
| $^{35}$Ar | 1,7756 s | 5,966 | 3/2+ | ε | | 34,975 257 59(80) |
| $^{36}$Ar | stabil $^{2ε}$ | | 0+ | | 000,3336 | 35,967 545 105(28) |
| $^{37}$Ar | 35,04 d | 0,81387 | 3/2+ | ε | | 36,966 776 33(22) |
| $^{38}$Ar | stabil | | 0+ | | 000,0629 | 37,962 732 11(21) |
| $^{39}$Ar | 269 a | 0,56496 | 7/2− | β$^−$ | | 38,964 3130(54) |
| $^{40}$Ar | stabil | | 0+ | | 099,6035 | 39,962 383 1237(24) |
| $^{41}$Ar | 109,61 min | 2,492 | 7/2− | β$^−$ | | 40,964 500 57(37) |
| $^{42}$Ar | 32,9 a | 0,59931 | 0+ | β$^−$ | | 41,963 0457(62) |
| $^{43}$Ar | 5,37 min | 4,566 | 5/2− | β$^−$ | | 42,965 6361(57) |
| $^{44}$Ar | 11,87 min | 3,108 | 0+ | β$^−$ | | 43,964 9238(17) |
| $^{45}$Ar | 21,48 s | 6,845 | 5/2− | β$^−$ | | 44,968 039 73(55) |
| $^{46}$Ar | 8,4 s | 5,683 | 0+ | β$^−$ | | 45,968 083(44) |
| $^{47}$Ar | 1,23 s | 10,501 (β$^−$), 2,132 (β$^−$n) | 3/2− | β$^−$ > 99,8, β$^−$n < 0,2 | | 46,972 935(96) |
| $^{48}$Ar | 475 ms | 9,845 | 0+ | β$^−$ | | 47,975 91(32#) |
| $^{49}$Ar | 170 ms | 12,752 (β$^−$), 7,353 (β$^−$n) | 3/2− | β$^−$ = 35, β$^−$n = 65 | | 48,981 90(43#) |
| $^{50}$Ar | 85 ms | 12,808 (β$^−$), 8,62 (β$^−$n) | 0+ | β$^−$ = 65, β$^−$n = 35 | | 49,986 13(54#) |
| $^{51}$Ar | > 200 ns | 16,648 | 5/2− | β$^−$ | | 50,993 70(64#) |
| $^{52}$Ar | 10 ms | 15,575 | 0+ | β$^−$ | | 51,998 96(64#) |
| $^{53}$Ar | 3 ms | 18,472 | 5/2− | β$^−$ | | 53,007 29(75#) |

## $_{19}$ Kalium

| Iso­top | Halbwerts­zeit | Zerfallsenergie (MeV) | Spin / Parität | Zerfallsart(en) (%) | NH (%) | Masse (u) |
| $^{32}$K | | 2,52 | | p | | 32,022 65(54#) |
| $^{33}$K | < 25 ns | 1,954 | 3/2+ | p | | 33,007 56(21#) |
| $^{34}$K | < 25 ns | 0,87506 | 1+ | p | | 33,998 69(32#) |
| $^{35}$K | 178 ms | 11,875 (ε), 5,978 (εp) | 3/2+ | ε = 99,63, εp = 0,37 | | 34,988 005 41(55) |
| $^{36}$K | 342 ms | 12,815 (ε), 4,308 (εp), 6,174 (εα) | 2+ | ε = 99,95, εp = 0,05, εα = 0,0034 | | 35,981 302 01(37) |
| $^{37}$K | 1,226 s | 6,148 | 3/2+ | ε | | 36,973 375 89(10) |
| $^{38}$K | 7,636 min | 5,914 | 3+ | ε | | 37,969 081 12(21) |
| $^{38m1}$K | 924,3 ms | 6,045 | 0+ | ε | | 37,969 221 92 |
| $^{38m2}$K | 22 µs | 3,459 | 7+ | IT | | 37,972 794 35 |
| $^{39}$K | stabil | | 3/2+ | | 093,2581 | 38,963 706 4864(49) |
| $^{40}$K | 1,248·10$^9$ a | 1,311 (β$^−$), 1,504 (ε) | 4− | β$^−$ = 89,28, ε = 10,72 | 000,0117 | 39,963 998 166(60) |
| $^{40m1}$K | 336 ns | 1,644 | 0 | IT | | 39,965 763 07 |
| $^{41}$K | stabil | | 3/2+ | | 006,7302 | 40,961 825 2579(41) |
| $^{42}$K | 12,321 h | 3,525 | 2− | β$^−$ | | 41,962 402 31(11) |
| $^{43}$K | 22,3 h | 1,833 | 3/2+ | β$^−$ | | 42,960 734 70(44) |
| $^{44}$K | 22,13 min | 5,687 | 2− | β$^−$ | | 43,961 586 99(45) |
| $^{45}$K | 17,81 min | 4,197 | 3/2+ | β$^−$ | | 44,960 691 49(56) |
| $^{46}$K | 105 s | 7,725 | 2− | β$^−$ | | 45,961 981 59(78) |
| $^{47}$K | 17,5 s | 6,632 | 1/2+ | β$^−$ | | 46,961 6616(15) |
| $^{48}$K | 6,8 s | 11,94 (β$^−$), 1,988 (β$^−$n) | 2− | β$^−$ = 98,86, β$^−$n = 1,14 | | 47,965 341 19(83) |
| $^{49}$K | 1,26 s | 11,688 (β$^−$), 6,542 (β$^−$n) | 3/2+ | β$^−$ = 14, β$^−$n = 86 | | 48,968 210 75(86) |
| $^{50}$K | 472 ms | 13,861 (β$^−$), 7,501 (β$^−$n) | 2− | β$^−$ = 71, β$^−$n = 29 | | 49,972 3800(83) |
| $^{51}$K | 365 ms | 13,822 (β$^−$), 9,002 (β$^−$n) | 3/2+ | β$^−$ = 53, β$^−$n = 47 | | 50,975 828(14) |
| $^{52}$K | 118 ms | 17,72 (β$^−$), 11,724 (β$^−$n) | 2− | β$^−$ = 36, β$^−$n = 64 | | 51,982 24(43#) |
| $^{53}$K | 30 ms | 16,776 (β$^−$), 14,511 (β$^−$n), 8,515 (β$^−$2n) | 3/2+ | β$^−$ = 16, β$^−$n = 67, β$^−$2n = 17 | | 52,987 46(54#) |
| $^{54}$K | 10 ms | 19,776 (β$^−$), 15,384 (β$^−$n) | 2− | β$^−$ = ?, β$^−$n = ? | | 53,994 63(64#) |
| $^{55}$K | 3 ms | 19,058 (β$^−$), 17,414 (β$^−$n) | 3/2+ | β$^−$ = ?, β$^−$n = ? | | 55,000 76(75#) |
| $^{56}$K | > 620 ns | 21,825 | | β$^−$ | | 56,008 51(86#) |

## $_{20}$ Calcium

| Iso­top | Halbwerts­zeit | Zerfallsenergie (MeV) | Spin / Parität | Zerfallsart(en) (%) | NH (%) | Masse (u) |
| $^{34}$Ca | < 35 ns | 1,474 | 0+ | p | | 34,014 87(32#) |
| $^{35}$Ca | 25,7 ms | 15,877 (εp), 11,213 (ε2p) | 3/2+ | εp = 95,9, ε2p = 4,1 | | 35,005 14(21#) |
| $^{36}$Ca | 102 ms | 10,966 (ε), 9,307 (εp) | 0+ | ε = 45,7, εp = 54,3 | | 35,993 074(43) |
| $^{37}$Ca | 181,1 ms | 11,664 (ε), 9,807 (εp) | 3/2+ | ε = 18,9, εp = 82,1 | | 36,985 897 85(68) |
| $^{38}$Ca | 440 ms | 6,742 | 0+ | ε | | 37,976 319 22(21) |
| $^{39}$Ca | 859,6 ms | 6,525 | 3/2+ | ε | | 38,970 710 81(64) |
| $^{40}$Ca | stabil $^{2ε}$ | 0,19351 | 0+ | 2ε | 096,941 | 39,962 590 863(22) |
| $^{41}$Ca | 1,02·10$^5$ a | 0,422 | 7/2− | ε | | 40,962 277 92(15) |
| $^{42}$Ca | stabil | | 0+ | | 000,647 | 41,958 617 83(16) |
| $^{43}$Ca | stabil | | 7/2− | | 000,135 | 42,958 766 44(24) |
| $^{44}$Ca | stabil | | 0+ | | 002,086 | 43,955 481 56(35) |
| $^{45}$Ca | 162,61 d | 0,25902 | 7/2− | β$^−$ | | 44,956 186 35(39) |
| $^{46}$Ca | stabil $^{2β}$ | 0,98858 | 0+ | 2β | 000,004 | 45,953 6890(24) |
| $^{47}$Ca | 4,536 d | 1,992 | 7/2− | β$^−$ | | 46,954 5424(24) |
| $^{48}$Ca | > 6,4·10$^{19}$ a | 0,27867 (β$^−$), 4,267 (2β) | 0+ | β$^−$ = 25, 2β = 75 | 000,187 | 47,952 522 76(13) |
| $^{49}$Ca | 8,718 min | 5,261 | 3/2− | β$^−$ | | 48,955 662 74(23) |
| $^{50}$Ca | 13,9 s | 4,959 | 0+ | β$^−$ | | 49,957 4992(17) |
| $^{51}$Ca | 10 s | 6,89 | 3/2− | β$^−$ | | 50,960 989(24) |
| $^{52}$Ca | 4,6 s | 5,903 (β$^−$), 0,89431 (β$^−$n) | 0+ | β$^−$ = 98, β$^−$n = 2 | | 51,963 217(64) |
| $^{53}$Ca | 90 ms | 9,65 (β$^−$), 3,638 (β$^−$n) | 3/2− | β$^−$ = 70, β$^−$n = 30 | | 52,969 45(43#) |
| $^{54}$Ca | 86 ms | 9,442 | 0+ | β$^−$ | | 53,973 40(54#) |
| $^{55}$Ca | 22 ms | 11,625 | 5/2− | β$^−$ | | 54,980 30(54#) |
| $^{56}$Ca | 11 ms | 10,833 (β$^−$), 8,006 (β$^−$n) | 0+ | β$^−$ = ?, β$^−$n = ? | | 55,985 08(64#) |
| $^{57}$Ca | 5 ms | 13,833 (β$^−$), 9,786 (β$^−$n) | | β$^−$ = ?, β$^−$n = ? | | 56,992 62(64#) |
| $^{58}$Ca | > 620 ns | 12,957 (β$^−$), 10,717 (β$^−$n) | 0+ | β$^−$ = ?, β$^−$n = ? | | 57,997 94(75#) |
Siehe auch Liste der Isotope#Weblinks