An apparatus for preparing isotopically pure He4
نویسندگان
چکیده
منابع مشابه
An Apparatus for Preparing Isotopically Pure He
The helium extracted from gas wells consists predominantly of He but it also contains traces (a few parts in 10) of the other stable isotope, He. For many purposes, the presence of the He may be neglected. Commercial He, widely used for a variety of cryogenic and other technological applications, usually consists of the two isotopes in their natural relative abundances. There are certain other ...
متن کاملContinuous Flow Apparatus for Preparing Isotopically Pure He
A He isotopic purification cryostat has been developed, capable of sustained operation in continuous flow. Starting from a feedstock of helium of the natural isotopic ratio, He/He = x3 ≈ 10−7, it yields a purified product for which x3 < 5× 10−13 at a production rate of 3.3 STP m h−1. The isotopically purified He is being used for a variety of applications, including quantum evaporation experime...
متن کاملMethods of preparing spectrographically pure praseodymium salts
An ion-exchange process was developed for the separation of spectrographically pure praseodymium salts in kilogram amounts from commercially available concentrates. The application of either 0.5% or 0.1% citrate solutions as eluting agents was show to result in excellent separations of praseodymium from samarium, neodymium, and lanthanum when the mixed rare earths were eluted from Amberlite IR-...
متن کاملPreparing an Outline Before Writing an Article
سخن سردبیر Editorial مجله دانشگاه علوم پزشکی رفسنجان دوره نوزدهم، آبان 1399، 772-771 تهیه چهارچوب مقاله پیش از نگارش آن Preparing an Outline Before Writing an Article محسن رضائیان[1] M. Rezaeian تا کنون در مجله دانشگاه پیرامون نگارش یک مقاله علمی، موضوعات فراوانی را در قالب سخن سردبیری تقدیم خوانندگان فرهیخته نموده‌ایم [5-1]. در این سخن سردبیری، قصد داریم به یک نکته...
متن کاملAn Improved Correlation for Second Virial Coefficients of Pure Fluids
In the present work, a modified correlation is presented for the second virial coefficients of both polar and nonpolar fluids based on the corresponding states principle. The second virial coefficients of gaseous polar and non-polar compounds were calculated and compared with experimental data and with other correlations. Comparisons with the existing correlations show that the present work is ...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Cryogenics
سال: 1978
ISSN: 0011-2275
DOI: 10.1016/0011-2275(78)90002-4