放射性核素衰变表格

1、1 放射性核素衰变表3h35S32P125 i131 i1时间（年）剩余活性（%）时间（年）剩余活性（%）时间（年）剩余活性（%）时间（年）剩余活性（%）时间（年）剩余活性（%）194.5298.4195.3495.50.298.3289.3596.1290.8891.20.496.6384.41092.3386.51287.10.695.0479.81588.7482.51683.11.0191.8575.42085.3578.52079.41.687.2671.32582.0674.82475.82.381.2767.43178.1771.22872.43.176.7863.73774.5

2、867.83269.14.071.0960.24371.0964.73666.05.065.21056.95067.01061.24063.06.159.31153.85763.61158.74460.27.353.41250.96559.61255.94857.48.150.012.350.07356.01353.25254.88152.51450.75652.4187.150.014.350.06050.01 2.放射性测定单位单位定义换算吸收放射线剂量（拉得 rad ）100尔格/克（电离辐射传给单位质量物质 的能量）0.87rad=1r伦琴（r）使1克空气产生1.6 X1012离子对的

3、X或Y-射线的照射剂量r/0.87=1rad居里（Ci）每秒放射性衰变3.7 X1010个原子的量1Ci=103mCi=10 gCi毫居（mCi）千分之一居里1mCi=103Ci=103gCi微居（卩Ci）百万分之一居里（每分钟衰变2.2 X106次）1 2=10 -6Ci=10-3MCi伯克莱尔（Bq）每秒衰变1个原子的量1Bq=3.7X10 -10Ci千伯克莱尔（kBq）31kBq=10 Bq百万伯克莱尔（MBq1MBq=10Bq兆伯克莱尔（GBq1GBq=10Bq每分钟衰变数（dpn）每分钟衰变的原子数2.2 X106dpm=1gCi每分钟计数（cpm）测量仪测岀每分钟 3粒子数Cpm=

4、dpm计数器效率卜一、原子量符号原子序数原子量辛阿(actinium )Ac89227.02辛吕(aluminium )Al1326.98镅(americium )Am95(243)锑(antimony )Sb51121.75氩(argon)Ar1839.94砷(arsenic )As3374.92砹(astatine )At85(210)钡(barium )Ba56137.33锫(berkelium )Bk97(247)1铍(beryllium )Be49.01铋(bismuth )Bi83208.98硼( boron)B510.81溴(bromine )Br3579.90镉(cadmium

5、)Cd48112.41钙(calcium )Ca2040.08锎1( californium )Cf98(251)碳(carbon )C612.01铈(cerium )Ce58140.12铯(cesium)Cs55132.90氯(chlorine )Cl1735.45铬(chromium)Cr2451.99钻(cobalt )Co2758.93铜(copper)Cu2963.54锔(curium )Cm96(247)镝(dysprosium )Dy66162.50锿(einsteinium )Es99(252)铒(erbium )Er68167.26铕(euroqium )Eu63151.96

6、镄(fermium )Fm100(257)1氟(fluorine )F918.99钫(francium )Fr87(223)钆(gadolinium )Gd64157.52镓(galium )Ga3169.72锗(germanium)Ge3272.59金( gold )Au79196.96铪(hafnium )Hf72178.49氦(helium )He24.00钦(holmium)Ho67164.93氢(hydrogen )H11.00铟1( indium )In49114.82碘(iodine )I53126.90铱(iridium )Ir77192.22 ”铁(iron )Fe26155

7、.84氪(krypton )Kr3683.80镧(lanthanum )La57139.90铹(Lawrencium)Lr103(260)铅(lead )Pb82207.2锂(lithium )Li36.94镥(lutetium )Lu71174.96镁(Magnesium)Mg1224.30锰(manganse)Mn2554.93钔1( mendelevium)Md101(258)汞( molybdenum)Hg80200.59钼1( molybdenum)Mo4295.94钕(neodymium)Nd60144.24氖(neon)Ne1020.17镎(neptunium )Np93237.

8、04镍(nickel )Ni2858.69铌(niobium )Nb4192.00氮(nitrogen )N714.00锘(nobelium )No102(259)锇(osmium)Os76190.2氧(oxygen)O815.99卡巴(palladium )Pd46106.42磷(phosphorus )P1530.94铂(platium )Pt78195.08钚(piutonium )Pu94(244)钋(polonium )Po84(209)钾(potassium )K1939.09镨(praseodymium)Pr59140.90钜(promethium )Pm61(145)镤(pro

9、tactinium )Pa91231.03镭(radium )Ra88226.02氡(radon)Rn86(222)铼(rhenium )Re75186.20铑(rhodium )Rh45102.90 ”铷(rubidium )Rb37185.46钉(ruthenium )Ru44101.07钐(samarium)Sm62150.36钪(scandium)Sc2144.95硒(sillicon )Se3478.96硅( sillicon )Si1428.08银(sliver )Ag47107.86钠(sodium)Na1122.98锶(strontium )Sr3887.62硫( sulfur

10、 )S1632.06钽(tantalum )Ta73180.94锝(technetium )Tc43(98)碲(tellurium )Te52127.60铽(terbium )Tb65158.92铊(thallium )Tl81204.38钍(thorium )Th90232.03锡(tin )Sn50118.69铥(thulium )Tm69168.93钛(titanium )Ti2247.88钨(tungsten )W74183.85unhilhexium(Unh)106(263)unnilpentium(Unp)105(262)unnilquadium(Unq)104(261)unnilseptium(Uns)107(262)铀(