1) Isotopic shift of oxygen
氧同位素漂移
2) oxygen isotopes
氧同位素
1.
Through testing 45 carbonate samples collected from PermoCarboniferous caol measures of the Hedong coalfield,the distributions characteristics of carbon and oxygen isotopes in sequences are analyzed,whose feasibilities for sequence subdivision and correlation,as well as for study of relative sea level variations and late Paleozoic facies are also discussed.
系统分析了河东煤田上石炭统（Ｃ２）—下二叠统下部（Ｐ１１）４５个碳酸盐岩样品的碳氧同位素在层序中的分布特征，探讨了碳氧同位素应用于层序划分及对比、相对海平面变化研究及晚古生代地层沉积相研究的可能性。
2.
They are among the few minerals that show mass independent fractionation of oxygen isotopes.
硫酸盐不仅是常见矿物,还是自然界少数几个具有氧同位素非质量分馏效应的矿物之一。
3.
In order to analyse the regulation of past global changes in the low latitude and high elevation region,based on the fundamental of the high precision and high resolution thermal ionization mass spectrometry uranium(TIMS-U) series dating and the oxygen isotopes,taking a stalagmite from Qixing Cave in Guizhou Province for example,a time sequence of the paleoclimatic changes was established from 43.
为了研究过去全球变化在我国高海拔低纬度地区的变化规律,在高精度、高分辨率热电离质谱铀(TIMS-U)系定年和氧同位素基本原理的基础上,以贵州都匀七星洞一石笋为例,建立了43。
3) oxygen isotope
氧同位素
1.
Oxygen isotope geochemistry of UHP metamorphic rocks at Taohang in the Sulu terrane and its constraints on radiometric dating.;
胶南桃行超高压变质岩的氧同位素地球化学及其年代学制约
2.
Kinetics of oxygen isotope exchange between water and minerals of miarolitic alkaline granite from Nianzishan;
碾子山晶洞碱性花岗岩矿物-水氧同位素交换反应动力学
3.
Carbon and oxygen isotope geochemistry of carbonatite dykes from Bayan Obo, Nei Mongol;
白云鄂博碳酸岩墙碳氧同位素地球化学
4) isotope shift
同位素位移
1.
The isotope shifts, hyperfine structure, spontaneous emission branch ratio of the first excited level and Doppler width of the atom vapor beam were measured using laser induced fluorescence.
采用原子蒸气束激光诱导荧光法测量钆原子的第一激发态的同位素位移及超精细结构、原子跃迁自发辐射的分支比和原子蒸气束的多普勒宽度。
2.
And the influence of the Hg isotope shifts and hyperfine structure on relative intensity of the Zeeman effect is analyzed.
1 nm绿谱线Zeeman效应相对强度的理论计算和实验值,分析了Hg同位素位移及超精细结构对Hg的 Zeeman效应相对强度的影响。
5) isotope shifts
同位素位移
1.
The isotope shifts between all seven stable isotopes ()~(142～146,148,150)Nd~+ and hyperfine structure spectra of()~(143,145)Nd()~+are measured by using collinear fast-ion-beam laser spectroscopy.
利用共线快离子束-激光光谱学方法测量了钕离子所有7个稳定同位素(A=142～146,148,150)之间的同位素位移和两个奇同位素(A=143,145)的超精细结构分裂。
2.
In atomic spectroscopy, the subject of isotope shifts is one of the few problems that links atomic and nuclear physics.
原子光谱中 ,同位素位移是少数几个能够将原子物理学和原子核物理学这两个不同的物理学分支联系起来的课题之一 。
6) isotope shift
同位素移位
1.
A high-resolution isotope shift measurement of lithium isotopes in a suitable transition, combined with an accurate theoretical evaluation of the mass-shift contribution in the corresponding transition, can be used to determine the root-mean-square nuclear charge radii of these isotopes.
选择锂的合适跃迁 ,利用激光光谱技术高精度测量该跃迁的同位素移位 ,并扣除精确理论计算的质量移位贡献值 ,可以用来确定有关同位素的核电荷均方根半径 。
补充资料：氢同位素动力学同位素效应
分子式：
CAS号：
性质：在化学反应过程中反应物本身因同位素取代而改变能态，引起化学反应速度的差异。氢同位素动力学同位素效应很大，α=kH/kD可达2～10左右。0℃时Al4C3与水反应α=3.9，30℃时Fe与H2SO4反应α=6.6。轻水电解时比重水分解速度快，动力学同位素效应随电极材料、电解条件而变，氢-氘的α在3～12之间。当前采用减容电解来制取终浓重水。
CAS号：
性质：在化学反应过程中反应物本身因同位素取代而改变能态，引起化学反应速度的差异。氢同位素动力学同位素效应很大，α=kH/kD可达2～10左右。0℃时Al4C3与水反应α=3.9，30℃时Fe与H2SO4反应α=6.6。轻水电解时比重水分解速度快，动力学同位素效应随电极材料、电解条件而变，氢-氘的α在3～12之间。当前采用减容电解来制取终浓重水。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条