Radyum izotopları

Radyumun (88Ra) bilinen izotopları, 202Ra ile 234Ra aralığında ve tamamı radyoaktif olup toplamda 33 tanedir. Yarı ömrü 1600 yıl olan 226Ra en kararlı ve en yaygın bulunan radyum izotopudur. == İzotoplar == Nüklit Tarihî adı Z N İzotop kütlesi (Da) Yarı ömür Bozunma türü Yavru izotop Spin ve parite İzotop çokluğu 202Ra 88 114 202,00989(7) 2,6(21) ms [0,7(+33-3) ms] 0+ 203Ra 88 115 203,00927(9) 4(3) ms α 199Rn (3/2-) 203Ra 88 115 203,00927(9) 4(3) ms β+ (nadir) 203Fr (3/2-) 203mRa 220(90) keV 41(17) ms α 199Rn (13/2+) 203mRa 220(90) keV 41(17) ms β+ (nadir) 203Fr (13/2+) 204Ra 88 116 204,006500(17) 60(11) ms [59(+12-9) ms] α (%99,7) 200Rn 0+ 204Ra 88 116 204,006500(17) 60(11) ms [59(+12-9) ms] β+ (%0,3) 204Fr 0+ 205Ra 88 117 205,00627(9) 220(40) ms [210(+60-40) ms] α 201Rn (3/2-) 205Ra 88 117 205,00627(9) 220(40) ms [210(+60-40) ms] β+ (nadir) 205Fr (3/2-) 205mRa 310(110)# keV 180(50) ms [170(+60-40) ms] α 201Rn (13/2+) 205mRa 310(110)# keV 180(50) ms [170(+60-40) ms] İG (nadir) 205Ra (13/2+) 206Ra 88 118 206,003827(19) 0,24(2) s α 202Rn 0+ 207Ra 88 119 207,00380(6) 1,3(2) s α (%90) 203Rn (5/2-, 3/2-) 207Ra 88 119 207,00380(6) 1,3(2) s β+ (%10) 207Fr (5/2-, 3/2-) 207mRa 560(50) keV 57(8) ms İG (%85) 207Ra (13/2+) 207mRa 560(50) keV 57(8) ms α (%15) 203Rn (13/2+) 207mRa 560(50) keV 57(8) ms β+ (%0,55) 207Fr (13/2+) 208Ra 88 120 208,001840(17) 1,3(2) s α (%95) 204Rn 0+ 208Ra 88 120 208,001840(17) 1,3(2) s β+ (%5) 208Fr 0+ 208mRa 1800(200) keV 270 ns (8+) 209Ra 88 121 209,00199(5) 4,6(2) s α (%90) 205Rn 5/2- 209Ra 88 121 209,00199(5) 4,6(2) s β+ (%10) 209Fr 5/2- 210Ra 88 122 210,000495(16) 3,7(2) s α (%96) 206Rn 0+ 210Ra 88 122 210,000495(16) 3,7(2) s β+ (%4) 210Fr 0+ 210mRa 1800(200) keV 2,24 μs (8+) 211Ra 88 123 211,000898(28) 13(2) s α (%97) 207Rn 5/2(-) 211Ra 88 123 211,000898(28) 13(2) s β+ (%3) 211Fr 5/2(-) 212Ra 88 124 211,999794(12) 13,0(2) s α (%85) 208Rn 0+ 212Ra 88 124 211,999794(12) 13,0(2) s β+ (%15) 212Fr 0+ 212m1Ra 1958,4(5) keV 10,9(4) μs (8)+ 212m2Ra 2613,4(5) keV 0,85(13) μs (11)- 213Ra 88 125 213,000384(22) 2,74(6) dk α (%80) 209Rn 1/2- 213Ra 88 125 213,000384(22) 2,74(6) dk β+ (%20) 213Fr 1/2- 213mRa 1769(6) keV 2,1(1) ms İG (%99) 213Ra 17/2-# 213mRa 1769(6) keV 2,1(1) ms α (%1) 209Rn 17/2-# 214Ra 88 126 214,000108(10) 2,46(3) s α (%99,94) 210Rn 0+ 214Ra 88 126 214,000108(10) 2,46(3) s β+ (%0,06) 214Fr 0+ 215Ra 88 127 215,002720(8) 1,55(7) ms α 211Rn (9/2+)# 215m1Ra 1877,8(5) keV 7,1(2) μs (25/2+) 215m2Ra 2246,9(5) keV 1,39(7) μs (29/2-) 215m3Ra 3756,6(6)+X keV 0,555(10) μs (43/2-) 216Ra 88 128 216,003533(9) 182(10) ns α 212Rn 0+ 216Ra 88 128 216,003533(9) 182(10) ns EY (%1×10−8) 216Fr 0+ 217Ra 88 129 217,006320(9) 1,63(17) μs α 213Rn (9/2+) 218Ra 88 130 218,007140(12) 25,2(3) μs α 214Rn 0+ 218Ra 88 130 218,007140(12) 25,2(3) μs β+β+ (nadir) 218Rn 0+ 219Ra 88 131 219,010085(9) 10(3) ms α 215Rn (7/2)+ 220Ra 88 132 220,011028(10) 17,9(14) ms α 216Rn 0+ 221Ra 88 133 221,013917(5) 28(2) s α 217Rn 5/2+ Eser 221Ra 88 133 221,013917(5) 28(2) s KB (%1,2×10−10) 207Pb 14C 5/2+ Eser 222Ra 88 134 222,015375(5) 38,0(5) s α 218Rn 0+ 222Ra 88 134 222,015375(5) 38,0(5) s KB (%3×10−8) 208Pb 14C 0+ 223Ra Actinium X 88 135 223,0185022(27) 11,43(5) g α 219Rn 3/2+ Eser 223Ra Actinium X 88 135 223,0185022(27) 11,43(5) g KB (%6,4×10−8) 209Pb 14C 3/2+ Eser 224Ra Thorium X 88 136 224,0202118(24) 3,6319(23) g α 220Rn 0+ Eser 224Ra Thorium X 88 136 224,0202118(24) 3,6319(23) g KB (%4,3×10−9) 210Pb 14C 0+ Eser 225Ra 88 137 225,023612(3) 14,9(2) g β- 225Ac 1/2+ Eser 226Ra Radyum 88 138 226,0254098(25) 1600(7) y α 222Rn 0+ Eser 226Ra Radyum 88 138 226,0254098(25) 1600(7) y β-β- (nadir) 226Th 0+ Eser 226Ra Radyum 88 138 226,0254098(25) 1600(7) y KB (%2,6×10−9) 212Pb 14C 0+ Eser 227Ra 88 139 227,0291778(25) 42,2(5) dk β- 227Ac 3/2+ 228Ra Mezotoryum 1 88 140 228,0310703(26) 5,75(3) y β- 228Ac 0+ Eser 229Ra 88 141 229,034958(20) 4,0(2) dk β- 229Ac 5/2(+) 230Ra 88 142 230,037056(13) 93(2) dk β- 230Ac 0+ 231Ra 88 143 231,04122(32)# 103(3) s β- 231Ac (5/2+) 231mRa 66,21(9) keV ~53 μs (1/2+) 232Ra 88 144 232,04364(30)# 250(50) s β- 232Ac 0+ 233Ra 88 145 233,04806(50)# 30(5) s β- 233Ac 1/2+# 234Ra 88 146 234,05070(53)# 30(10) s β- 234Ac 0+ == Notlar == * # ile işaretlenen değerler tamamen deneyler sonucu elde edilen veriler değildir ve kısmen sistematik eğilimle göre belirlenmiştir. == Kaynakça == Kategori:İzotoplar İzotop