Science. 1970 Jan 30;167(3918):577-80. doi: 10.1126/science.167.3918.577.
The (7)Be, (22)Na, (26)Al, (44)Ti, (46)SC, (48)V (51)Cr, (54)Mn, (56)Co, (57)Co, (57)CO, (40)K, (238)U, and (232)Th were measured in lunar fines and portions of three rocks. Major production of cosmogenic radionuclides is due to solar protons, thus their concentrations are far different than those in meteorites. Surface exposures of the rocks and fines are long compared with the 0.74 million year half-life of (26)Al. Lunar fines show substantially higher concentrations of low energy reaction products. The ratios of thorium to uranium are extremely constant at 3.8, which indicates very little geochemical differentiation and are in good agreement with a common nucleosynthesis for lunar and earth materials.
（7）Be、（22）Na、（26）Al、（44）Ti、（46）SC、（48）V、（51）Cr、（54）Mn、（56）Co、（57）Co、（57）CO、（40）K、（238）U 和（232）Th 均在月球尘埃和 3 块岩石的部分样本中进行了测量。宇宙成因放射性核素的主要产生源于太阳质子，因此它们的浓度与陨石中的浓度大不相同。与半衰期为 0.74 百万年的（26）Al 相比，这些岩石和尘埃的表面暴露时间长得多。月球尘埃显示出高浓度的低能反应产物。钍与铀的比值极其稳定，为 3.8，这表明月球和地球物质的核合成过程几乎没有地球化学差异，这与核合成过程非常吻合。
