Polonyum izotopları

Polonyum (84Po), kütle numaraları 186 ile 227 arasında değişen ve tamamı radyoaktif olan 42 izotopa sahiptir. Bunların içinden 138,376 günlük yarı ömre sahip 210Po, doğal olarak oluşan polonyumlar arasındaki en uzun yarı ömre sahip izotoptur. 209Po ise 125 yıllık yarı ömrüyle tüm polonyum izotopları arasında en uzun yarı ömre sahip olan izotop konumundadır. 209Po ile 208Po, bir siklotronda, bizmutun proton bombardımanına maruz bırakılmasıyla üretilebilmektedir. == İzotoplar == Nüklit Tarihî adı Z N İzotop kütlesi (Da) Yarı ömür Bozunma türü Yavru izotop Spin ve parite İzotop çokluğu 186Po 84 102 186,0044(18) 34(12) μs α 182Pb 0+ 187Po 84 103 187,00304(30) 1,40(0,25) ms α 183Pb (1/2-), (5/2-) 187mPo 4(27) keV 0,5 ms 13/2+# 188Po 84 104 187,999422(21) 430(180) μs [0,40(+20-15) ms] α 184Pb 0+ 189Po 84 105 188,998481(24) 5(1) ms α 185Pb 3/2-# 190Po 84 106 189,995101(14) 2,46(5) ms α (%99,9) 186Pb 0+ 190Po 84 106 189,995101(14) 2,46(5) ms β+ (%0,1) 190Bi 0+ 191Po 84 107 190,994574(12) 22(1) ms α 187Pb 3/2-# 191Po 84 107 190,994574(12) 22(1) ms β+ (nadir) 191Bi 3/2-# 191mPo 130(21) keV 93(3) ms (13/2+) 192Po 84 108 191,991335(13) 32,2(3) ms α (%99) 188Pb 0+ 192Po 84 108 191,991335(13) 32,2(3) ms β+ (%1) 192Bi 0+ 192mPo 2600(500)# keV ~1 μs 12+# 193Po 84 109 192,99103(4) 420(40) ms [370(+46-40) ms] α 189Pb 3/2-# 193Po 84 109 192,99103(4) 420(40) ms [370(+46-40) ms] β+ (nadir) 193Bi 3/2-# 193mPo 100(30)# keV 240(10) ms [243(+11-10) ms] α 189Pb (13/2+) 193mPo 100(30)# keV 240(10) ms [243(+11-10) ms] β+ (nadir) 193Bi (13/2+) 194Po 84 110 193,988186(13) 0,392(4) s α 190Pb 0+ 194Po 84 110 193,988186(13) 0,392(4) s β+ (nadir) 194Bi 0+ 194mPo 2525(2) keV 15(2) μs (11-) 195Po 84 111 194,98811(4) 4,64(9) s α (%75) 191Pb 3/2-# 195Po 84 111 194,98811(4) 4,64(9) s β+ (%25) 195Bi 3/2-# 195mPo 110(50) keV 1,92(2) s α (%90) 191Pb 13/2+# 195mPo 110(50) keV 1,92(2) s β+ (%10) 195Bi 13/2+# 195mPo 110(50) keV 1,92(2) s İG (%0,01) 195Po 13/2+# 196Po 84 112 195,985535(14) 5,56(12) s α (%94) 192Pb 0+ 196Po 84 112 195,985535(14) 5,56(12) s β+ (%6) 196Bi 0+ 196mPo 2490,5(17) keV 850(90) ns (11-) 197Po 84 113 196,98566(5) 53,6(10) s β+ (%54) 197Bi (3/2-) 197Po 84 113 196,98566(5) 53,6(10) s α (%44) 193Pb (3/2-) 197mPo 230(80)# keV 25,8(1) s α (%84) 193Pb (13/2+) 197mPo 230(80)# keV 25,8(1) s β+ (%16) 197Bi (13/2+) 197mPo 230(80)# keV 25,8(1) s İG (%0,01) 197Po (13/2+) 198Po 84 114 197,983389(19) 1,77(3) dk α (%57) 194Pb 0+ 198Po 84 114 197,983389(19) 1,77(3) dk β+ (%43) 198Bi 0+ 198m1Po 2565,92(20) keV 200(20) ns 11- 198m2Po 2691,86(20) keV 750(50) ns 12+ 199Po 84 115 198,983666(25) 5,48(16) dk β+ (%92,5) 199Bi (3/2-) 199Po 84 115 198,983666(25) 5,48(16) dk α (%7,5) 195Pb (3/2-) 199mPo 312,0(28) keV 4,17(4) dk β+ (%73,5) 199Bi 13/2+ 199mPo 312,0(28) keV 4,17(4) dk α (%24) 195Pb 13/2+ 199mPo 312,0(28) keV 4,17(4) dk İG (%2,5) 199Po 13/2+ 200Po 84 116 199,981799(15) 11,5(1) dk β+ (%88,8) 200Bi 0+ 200Po 84 116 199,981799(15) 11,5(1) dk α (%11,1) 196Pb 0+ 201Po 84 117 200,982260(6) 15,3(2) dk β+ (%98,4) 201Bi 3/2- 201Po 84 117 200,982260(6) 15,3(2) dk α (%1,6) 197Pb 3/2- 201mPo 424,1(24) keV 8,9(2) dk İG (%56) 201Po 13/2+ 201mPo 424,1(24) keV 8,9(2) dk EC (%41) 201Bi 13/2+ 201mPo 424,1(24) keV 8,9(2) dk α (%2,9) 197Pb 13/2+ 202Po 84 118 201,980758(16) 44,7(5) dk β+ (%98) 202Bi 0+ 202Po 84 118 201,980758(16) 44,7(5) dk α (%2) 198Pb 0+ 202mPo 2626,7(7) keV >200 ns 11- 203Po 84 119 202,981420(28) 36,7(5) dk β+ (%99,89) 203Bi 5/2- 203Po 84 119 202,981420(28) 36,7(5) dk α (%0,11) 199Pb 5/2- 203m1Po 641,49(17) keV 45(2) s İG (%99,96) 203Po 13/2+ 203m1Po 641,49(17) keV 45(2) s α (%0,04) 199Pb 13/2+ 203m2Po 2158,5(6) keV >200 ns 204Po 84 120 203,980318(12) 3,53(2) sa β+ (%99,33) 204Bi 0+ 204Po 84 120 203,980318(12) 3,53(2) sa α (%0,66) 200Pb 0+ 205Po 84 121 204,981203(21) 1,66(2) sa β+ (%99,96) 205Bi 5/2- 205Po 84 121 204,981203(21) 1,66(2) sa α (%0,04) 201Pb 5/2- 205m1Po 143,166(17) keV 310(60) ns 1/2- 205m2Po 880,30(4) keV 645 μs 13/2+ 205m3Po 1461,21(21) keV 57,4(9) ms İG 205Po 19/2- 205m4Po 3087,2(4) keV 115(10) ns 29/2- 206Po 84 122 205,980481(9) 8,8(1) g β+ (%94,55) 206Bi 0+ 206Po 84 122 205,980481(9) 8,8(1) g α (%5,45) 202Pb 0+ 206m1Po 1585,85(11) keV 222(10) ns (8+)# 206m2Po 2262,22(14) keV 1,05(6) μs (9-)# 207Po 84 123 206,981593(7) 5,80(2) sa β+ (%99,97) 207Bi 5/2- 207Po 84 123 206,981593(7) 5,80(2) sa α (%0,021) 203Pb 5/2- 207m1Po 68,573(14) keV 205(10) ns 1/2- 207m2Po 1115,073(16) keV 49(4) μs 13/2+ 207m3Po 1383,15(6) keV 2,79(8) s İG 207Po 19/2- 208Po 84 124 207,9812457(19) 2,898(2) y α (%99,99) 204Pb 0+ 208Po 84 124 207,9812457(19) 2,898(2) y β+ (%0,00277) 208Bi 0+ 209Po 84 125 208,9824304(20) 125,2(3,3) y α (%99,52) 205Pb 1/2- 209Po 84 125 208,9824304(20) 125,2(3,3) y β+ (%0,48) 209Bi 1/2- 210Po Radyum F 84 126 209,9828737(13) 138,376(2) g α 206Pb 0+ Eser 210mPo 5057,61(4) keV 263(5) ns 16+ 211Po Actinium C' 84 127 210,9866532(14) 0,516(3) s α 207Pb 9/2+ Eser 211m1Po 1462(5) keV 25,2(6) s α (%99,98) 207Pb (25/2+) 211m1Po 1462(5) keV 25,2(6) s İG (%0,016) 211Po (25/2+) 211m2Po 2135,7(9) keV 243(21) ns (31/2-) 211m3Po 4873,3(17) keV 2,8(7) μs (43/2+) 212Po Thorium C' 84 128 211,9888680(13) 299(2) ns α 208Pb 0+ Eser 212mPo 2911(12) keV 45,1(6) s α (%99,93) 208Pb (18+) 212mPo 2911(12) keV 45,1(6) s İG (%0,07) 212Po (18+) 213Po 84 129 212,992857(3) 3,65(4) μs α 209Pb 9/2+ Eser 214Po Radyum C' 84 130 213,9952014(16) 164,3(20) μs α 210Pb 0+ Eser 215Po Actinium A 84 131 214,9994200(27) 1,781(4) ms α (%99,99) 211Pb 9/2+ İz 215Po Actinium A 84 131 214,9994200(27) 1,781(4) ms β- (%2,3×10−4) 215At 9/2+ İz 216Po Toryum A 84 132 216,0019150(24) 0,145(2) s α 212Pb 0+ İz 216Po Toryum A 84 132 216,0019150(24) 0,145(2) s β-β- (nadir) 216Rn 0+ İz 217Po 84 133 217,006335(7) 1,47(5) s α (%95) 213Pb 5/2+# 217Po 84 133 217,006335(7) 1,47(5) s β- (%5) 217At 5/2+# 218Po Radyum A 84 134 218,0089730(26) 3,10(1) dk α (%99,98) 214Pb 0+ İz 218Po Radyum A 84 134 218,0089730(26) 3,10(1) dk β- (%0,02) 218At 0+ İz 219Po 84 135 219,01361(16) 10,3(1) dk α (%28,2) 215Pb 9/2+# 219Po 84 135 219,01361(16) 10,3(1) dk β- (%71,8) 219At 9/2+# 220Po 84 136 220,0164(18) 40# s [>300 ns] β- 220At 0+ 221Po 84 137 221,02123(20) 2,2(0,7) min β- 221At 9/2+# 222Po 84 138 222,024144(40) 9,1(7,2) min β- 222At 0+ == Notlar == == Kaynakça == Kategori:İzotoplar İzotop