水对圣卡洛斯橄榄石α-β相变动力学的影响

在压力为13.5 GPa 和温度为1030℃的实验中,水的存在极大地提高了由橄榄石的相变形成的瓦兹利石的生长速率。有水时,瓦兹利石具有低位错密度和亚晶界。水促进了瓦兹利石的位错恢复,引起了与相变伴随的局部压力降的非弹性张弛,从而增加了生长速率。这些结果说明,很少量的水(重量的0.05%)也能够弱化地幔中的瓦兹利石。

《AIJ钢筋混凝土建筑设计指南》简介

1 概述 日本的第一本建筑规范《城市建筑规程》是1919年颁布的,其目的是要让六个主要城市的建筑规范化。在1920年的《城市建筑规程实施规则》中,概要提出了基于容许应力法的结构设计准则。1923年关东地震后,在1924年的《城市建筑规程实施规则》中引入了采用地震系数为0.1的抗震设计思想。其后,《城市建筑规程》

丰质子同位素^(65)As的初步观察

使用20.11A MeV ^(64)Zn束轰击17.2 mg/cm^2的Be靶,初步观察到了丰质子同位素^(65)As。采用由磁分析器、PPAC、电离室和PSSD组成的探测系统,成功地鉴別了反应产物的电荷态、原子系数和质量数。

NIRS的ECR离子源现状(英文)

Four ECR ion sources have been operated in National Institute of Radiological Sciences（NIRS）. Two ECR ion sources supply various ion species for the Heavy Ion Medical Accelerator in Chiba（HIMAC）. The 10GHz NIRS-ECR ion source mainly produces C2+ ions for the heavy-ion therapy.Ions of Si,Ar,Fe,Kr and Xe are usually produced by the 18GHz NIRS-HEC ion source for physical and biological experiments.The other two compact ECR ion sources with all permanent magnet configuration have been developed for the new generation carbon therapy facility.One of these,the Kei-source,is a prototype which has been installed to the NIRS-930 cyclotron for axial injection.The other source,Kei2-source,is a demonstration source and utilized for the new generation Linac.In addition,both Kei sources have been used to study fundamental properties. In this paper,present status of the ion sources and recent developments are reported.