THE ABSOLUTE ISOTOPIC COMPOSITION OF CERIUM

被引：18

作者：

CHANG, TL

QIAN, QY

ZHAO, MT

WANG, J

LANG, QY

机构：

[1] NATL RES CTR CERTIFIED REFERENCE MAT,BEIJING 100013,PEOPLES R CHINA

[2] CHINESE ACAD GEOL SCI,INST ROCK & MINERAL ANAL,BEIJING 100037,PEOPLES R CHINA

来源：

INTERNATIONAL JOURNAL OF MASS SPECTROMETRY AND ION PROCESSES | 1995年 / 142卷 / 1-2期

基金：

中国国家自然科学基金;

关键词：

ATOMIC WEIGHT; CERIUM; ISOTOPIC ABUNDANCE; THERMAL IONIZATION;

D O I：

10.1016/0168-1176(95)90677-A

中图分类号：

O64 [物理化学（理论化学）、化学物理学]; O56 [分子物理学、原子物理学];

学科分类号：

070203 ; 070304 ; 081704 ; 1406 ;

摘要：

Calibrated mass spectrometric measurements on highly enriched isotopes of cerium in the form of oxides of well-defined purity were carried out using a thermal ionization mass spectrometer, yielding an absolute isotopic composition of 0.186(1) at.% Ce-136, 0.251(1) at.% Ce-138, 88.449(34) at.% Ce-140 and 11.114(34) at.% Ce-142, and the atomic weight of cerium as 140.1157(8) with an error given as 2 sigma. No isotopic fractionation was found in terrestrial normal cerium materials.

引用

页码：125 / 131

页数：7