发明名称 |
Method and apparatus for measuring stable isotopes |
摘要 |
Spectroscopic measurements of stable isotopes are performed using a tunable lead salt diode laser. The design of the system is based upon the optimization of isotopic spectral lines from two different path lengths in an absorption cell using a single gaseous sample. A short path cell to measure the more abundant species and a long path cell to measure the less abundant species are used. A micrometer adjustment of a path length is used for equalizing spectral line intensities to obtain a measure of isotope enrichment or of absolute isotopic concentration.
|
申请公布号 |
US4684805(A) |
申请公布日期 |
1987.08.04 |
申请号 |
US19850767742 |
申请日期 |
1985.08.21 |
申请人 |
GENERAL MOTORS CORPORATION |
发明人 |
SHU-TI LEE, PETER;MAJKOWSKI, RICHARD F.;PARTIN, DALE L. |
分类号 |
G01N21/39;(IPC1-7):G01J1/00 |
主分类号 |
G01N21/39 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|