用~（90）Zr（n，2n）~（89m＋g）Zr和~（93）Nb（n，2n）~（

叙述了用９０Ｚｒ（ｎ，２ｎ）８９ｍ＋ｇＺｒ和９３Ｎｂ（ｎ，２ｎ）９２ｍＮｂ反应截面比测定Ｄ－Ｔ中子平均能量的方法。用硅探测器对中子平均能量进行监测，测量了６个不同能点的铌锆截面比值，得到了铌锆截面比与中子平均能量的关系曲线。     

Preliminary study of microscale zircon oxygen isotopes for Dabie-Sulu metamorphic rocks： Ion probe in situ analyses

151 in situ analyses of oxygen isotopes were carried out by ion micro-probe for zircons from 8 localities of HP-UHP metamorphic rocks including eclogites in the Dabie-Sulu terrane. The results show significant heterogeneity in δ^18O values, with variation in different rocks from -8.5‰ to 9.7‰ and within one sample from 2‰ to 12‰. No measurable difference in δ^18O was observed between protolith magmatic (detrital) zircons and metamorphic recrystallized zircons within analytical uncertainties from the ion micro-probe measurements. This indicates that the metamorphic zircons have inherited the oxygen isotopic compositions of protolith zircons despite the HP to UHP metamorphism. According to their protolith ages from zircon U-Pb in situ dating by the same ion micro-probe, two groups of oxygen isotope composition are recognized, with one having δ^18O values of 6‰-7‰ for old protolith of 1.9-2.5 Ga ages and the other 0‰-2‰ for young protolith of 0.7-0.8 Ga ages. The latter anomalously low δ^18O values of zircons indicate that the magma has had the obvious involvement of meteoric water when forming the young protolith of high-grade metamorphic rocks. This may be correlated with the snowball Earth event occurring in South China and the world elsewhere during the Neoproterozoic.     

微观相互作用玻色子模型中热166,168,170Er核比热容及其相变的数值研究

应用微观相互作用玻色子模型，制备了偶166，168，170Er同位素的零温能谱，其值与最新的实验结果符合得比较好；采用正则系综理论，计算出核的有限温度比热容，基地比热峰是相变信号和对序参量的分析，有可能统一描述核发生的热激发模式相变，核形状相变和从超流相到正常相相变。     

The bio-barite in witherite deposits from Southern Qinling and its significance

Being stratiform or stratoid, the Huangboshuwan witherite deposit at Zhiyang and the Wenyuhe witherite-barite deposit at Zhushan occur in the lower Lower Cambrian siliceous rocks and the orebodies are remarkably controlled by lithological character and petrography. Carbon and oxygen isotopic studies of witherite, barytocalcite and calcite have shown that the carbon, involved in the formation of these minerals, was derived largely from organic carbon resultant from degradation, polycondensation and dehydroxylation of bio-organic matter in sediments at the early stage of diagenesis. Extensive occurrence of bio-barite strongly evidenced that Ba2+ was concentrated and settled down in the form of bio-barite on the seafloor as a result of biological processes, thereafter forming the initially enriched orebodies of barium deposits. The witherite was metasomatic products of bio-barite under the action of sulfate-reducing bacteria and organic and inorganic reduction.     

天然气氦同位素分布与大地构造环境

根据中国大陆主要含油气盆地天然气的＾３Ｈｅ／＾４Ｈｅ数据，首次系统研究了天然气中氦同位素空间分布与中国大地构造环境的关系。中国东部滨太平区＾３Ｈｅ／＾４Ｈｅ平均值Ｒ＝２．０８×１０＾－５＞Ｒａ，为含幔源氦的二元混合型氦；中西部区的Ｒ＝４．９６×１０＾－８，基本为地壳一元放射型氦；华北－中原区的Ｒ＝８．００×１０＾－７，为介于东与中西部之间的过渡型氦。整体而言，＾３Ｈｅ／＾４Ｈｅ值呈自东而西随远离西     

浙西北中生代火山岩的REE地球化学特征与成岩物质来源

研究浙西北中生代火山岩的REE分布和锶同位素组成,得出如下结论:酸性和中酸性火山岩与侵入岩的REE分配型式相似,均为向右倾的、彼此近于平行的V型曲线,具有铕负异常;它们的REE参数〔δEu,Sm/Nb,∑LREE/∑HREE和(La/Yb)_N〕仅存在较小差异;~(??)Sr/~(86)Sr初始比值为0.7056-0.7139。表明火山岩及侵入岩的成岩物质都来源于大陆壳,它们是由同源的陆壳物质重熔所形成的岩浆,经分异、演化,先后侵入或喷出形成的。     

应用双参数法对氦原子基态能级的研究

文章选取具有一定对称性且含有四个常参数的氯原子基态尝试波函数对氮原子的基态能量进行计算，求出基态能量平均值的表达式，然后根据所求得的能量平均值的表达式通过MATLAB程序进行最优化处理求其最小值，这一最小值就是我们所要求的氯原子基态能量．同时，由所算出的参数值确定波函数．