Science. 1976 Jan 9;191(4222):79-81. doi: 10.1126/science.191.4222.79.
The occurrence of positive and negative (26)Mg anomalies in inclusions of the Allende meteorite is explained in terms of proton bombardment of a gas of solar composition. A significant fraction of (26)Mg in the irradiated gas is stored temporarily in the form of radioactive (26)Al by the reaction (26)Mg(p,n) (26)Al. Proton fluxes of 10(17) to 10(19) protons per square centimeter per year at l million electron volts are inferred. Aluminum-rich materials condensing from the gas phase have positive (26)Mg anomalies, whereas magnesium-rich materials have negative (26)Mg anomalies. The proton flux required to account for the observed magnesium anomalies is used to investigate possible isotopic anomalies in the elements from oxygen to argon. Detectable isotopic anomalies are predicted only for neon. The anomalous neon is virtually pure (22)Ne from (22)Na decay. The predicted amount of anomalous (22)Ne is about 10(-8) cubic centimeter (at standard temperature and pressure) per milligram of sodium.
在 Allende 陨石包体中出现正、负（26）Mg 异常，可用质子辐照太阳组成气体来解释。在辐照气体中，（26）Mg 的很大一部分通过反应（26）Mg(p,n)（26）Al 暂时以放射性（26）Al 的形式储存。推断出在 100 万电子伏特时每平方厘米每年有 10（17）到 10（19）个质子的质子通量。从气相冷凝的富铝材料具有正（26）Mg 异常，而富镁材料具有负（26）Mg 异常。为了说明观察到的镁异常，需要用到所要求的质子通量来研究从氧到氩的元素可能存在的同位素异常。仅预测到氖有可探测到的同位素异常。异常氖几乎是纯（22）Ne，来自（22）Na 的衰变。预测的异常（22）Ne 量约为每毫克钠 10（-8）立方厘米（标准温度和压力下）。
