Astatin izotopları

Astatinin (85At), tamamı radyoaktif olan ve kütle numaraları 191 ile 229 arasında değişen 39 bilinen izotopu vardır. Bunların yanı sıra 24 bilinen yarı kararlı uyarılmış hâli mevcuttur. Elementin en uzun yarı ömre sahip izotopu olan 210At'nin yarı ömrü 8,1 saatken doğal izotopları arasındaki en uzun yarı ömre sahip olanı ise 56 saniyeyle 219At'dir. == İzotoplar == Nüklit Tarihî adı Z N İzotop kütlesi (Da) Yarı ömür Bozunma türü Yavru izotop Spin ve parite 191At 85 106 1,7(+11-5) ms (1/2+) 191mAt 2,1(+4-3) ms (7/2-) 192At 85 107 192,00314(28) 11,5(0,6) ms α (%99,79) 188Bi 3+# 192At 85 107 192,00314(28) 11,5(0,6) ms β+, SF (%0,21) (various) 3+# 192mAt 330(90)# keV 88(6) ms α (%99,79) 188mBi (9-, 10-) 192mAt 330(90)# keV 88(6) ms β+, SF (%0,21) (various) (9-, 10-) 193At 85 108 192,99984(6) 28(+5-4) ms α 189Bi (1/2+) 193m1At 50 keV 21(5) ms (7/2-) 193m2At 39 keV 27(+4-5) ms (13/2+) 194At 85 109 193,99873(20) 286(7) ms α 190Bi (4-, 5-) 194At 85 109 193,99873(20) 286(7) ms β+ (nadir) 194Po (4-, 5-) 194mAt 480(190) keV 323(7) ms α 190Bi (9-, 10-) 194mAt 480(190) keV 323(7) ms İG (nadir) 194At (9-, 10-) 195At 85 110 194,996268(10) 328(20) ms α (%75) 191Bi (1/2+) 195At 85 110 194,996268(10) 328(20) ms β+ (%25) 195Po (1/2+) 195mAt 34(7) keV 147(5) ms (7/2-) 196At 85 111 195,99579(6) 253(9) ms α (%96) 192Bi (3+) 196At 85 111 195,99579(6) 253(9) ms β+ (%4) 196Po (3+) 196m1At -30(80) keV 20# ms (10-) 196m2At 157,9(1) keV 11 µs (5+) 197At 85 112 196,99319(5) 0,390(16) s α (%96) 193Bi (9/2-) 197At 85 112 196,99319(5) 0,390(16) s β+ (%4,0) 197Po (9/2-) 197mAt 52(10) keV 2,0(2) s (1/2+) 198At 85 113 197,99284(5) 4,2(3) s α (%94) 194Bi (3+) 198At 85 113 197,99284(5) 4,2(3) s β+ (%6) 198Po (3+) 198mAt 330(90)# keV 1,0(2) s (10-) 199At 85 114 198,99053(5) 6,92(13) s α (%89) 195Bi (9/2-) 199At 85 114 198,99053(5) 6,92(13) s β+ (%11) 199Po (9/2-) 200At 85 115 199,990351(26) 43,2(9) s α (%57) 196Bi (3+) 200At 85 115 199,990351(26) 43,2(9) s β+ (%43) 200Po (3+) 200m1At 112,7(30) keV 47(1) s α (%43) 196Bi (7+) 200m1At 112,7(30) keV 47(1) s İG 200At (7+) 200m1At 112,7(30) keV 47(1) s β+ 200Po (7+) 200m2At 344(3) keV 3,5(2) s (10-) 201At 85 116 200,988417(9) 85(3) s α (%71) 197Bi (9/2-) 201At 85 116 200,988417(9) 85(3) s β+ (%29) 201Po (9/2-) 202At 85 117 201,98863(3) 184(1) s β+ (%88) 202Po (2, 3)+ 202At 85 117 201,98863(3) 184(1) s α (%12) 198Bi (2, 3)+ 202m1At 190(40) keV 182(2) s (7+) 202m2At 580(40) keV 460(50) ms (10-) 203At 85 118 202,986942(13) 7,37(13) dk β+ (%69) 203Po 9/2- 203At 85 118 202,986942(13) 7,37(13) dk α (%31) 199Bi 9/2- 204At 85 119 203,987251(26) 9,2(2) dk β+ (%96) 204Po 7+ 204At 85 119 203,987251(26) 9,2(2) dk α (%3,8) 200Bi 7+ 204mAt 587,30(20) keV 108(10) ms İG 204At (10-) 205At 85 120 204,986074(16) 26,2(5) dk β+ (%90) 205Po 9/2- 205At 85 120 204,986074(16) 26,2(5) dk α (%10) 201Bi 9/2- 205mAt 2339,65(23) keV 7,76(14) µs 29/2+ 206At 85 121 205,986667(22) 30,6(13) dk β+ (%99,11) 206Po (5)+ 206At 85 121 205,986667(22) 30,6(13) dk α (%0,9) 202Bi (5)+ 206mAt 807(3) keV 410(80) ns (10)- 207At 85 122 206,985784(23) 1,80(4) h β+ (%91) 207Po 9/2- 207At 85 122 206,985784(23) 1,80(4) h α (%8,6) 203Bi 9/2- 208At 85 123 207,986590(28) 1,63(3) h β+ (%99,5) 208Po 6+ 208At 85 123 207,986590(28) 1,63(3) h α (%0,55) 204Bi 6+ 209At 85 124 208,986173(8) 5,41(5) h β+ (%96) 209Po 9/2- 209At 85 124 208,986173(8) 5,41(5) h α (%4) 205Bi 9/2- 210At 85 125 209,987148(8) 8,1(4) h β+ (%99,8) 210Po (5)+ 210At 85 125 209,987148(8) 8,1(4) h α (%0,18) 206Bi (5)+ 210m1At 2549,6(2) keV 482(6) µs (15)- 210m2At 4027,7(2) keV 5,66(7) µs (19)+ 211At 85 126 210,9874963(30) 7,214(7) h EY (%58,2) 211Po 9/2- 211At 85 126 210,9874963(30) 7,214(7) h α (%42) 207Bi 9/2- 212At 85 127 211,990745(8) 0,314(2) s α (%99,95) 208Bi (1-) 212At 85 127 211,990745(8) 0,314(2) s β+ (%0,05) 212Po (1-) 212At 85 127 211,990745(8) 0,314(2) s β- (%2×10−6) 212Rn (1-) 212m1At 223(7) keV 0,119(3) s α (%99) 208Bi (9-) 212m1At 223(7) keV 0,119(3) s İG (%1) 212At (9-) 212m2At 4771,6(11) keV 152(5) µs (25-) 213At 85 128 212,992937(5) 125(6) ns α 209Bi 9/2- 214At 85 129 213,996372(5) 558(10) ns α 210Bi 1- 214m1At 59(9) keV 265(30) ns 214m2At 231(6) keV 760(15) ns 9- 215At 85 130 214,998653(7) 0,10(2) ms α 211Bi 9/2- Eser 216At 85 131 216,002423(4) 0,30(3) ms α (%99,99) 212Bi 1- 216At 85 131 216,002423(4) 0,30(3) ms β- (%0,006) 216Rn 1- 216At 85 131 216,002423(4) 0,30(3) ms EY (%3×10−7) 216Po 1- 216mAt 413(5) keV 100# µs (9-) 217At 85 132 217,004719(5) 32,3(4) ms α (%99,98) 213Bi 9/2- Eser 217At 85 132 217,004719(5) 32,3(4) ms β- (%0,012) 217Rn 9/2- Eser 218At 85 133 218,008694(12) 1,5(3) s α (%99,9) 214Bi 1-# Eser 218At 85 133 218,008694(12) 1,5(3) s β- (%0,10) 218Rn 1-# Eser 219At 85 134 219,011162(4) 56(3) s α (%97) 215Bi (9/2-) Eser 219At 85 134 219,011162(4) 56(3) s β- (%3) 219Rn (9/2-) Eser 220At 85 135 220,01541(6) 3,71(4) dk β- (%92) 220Rn 3(-#) 220At 85 135 220,01541(6) 3,71(4) dk α (%8) 216Bi 3(-#) 221At 85 136 221,01805(21)# 2,3(2) dk β- 221Rn 3/2-# 222At 85 137 222,02233(32)# 54(10) s β- 222Rn 223At 85 138 223,02519(43)# 50(7) s β- 223Rn 3/2-# 224At 85 139 224,02975(22)# 2,5(1,5) dk β- 224Rn == Notlar == == Kaynakça == Kategori:İzotoplar İzotop