Development of a Rapid Radiochemical Procedure for the Separation of
Development of a Rapid Radiochemical Procedure for the Separation of

Author:

Publisher:

Published: 1987

Total Pages:

ISBN-13:

DOWNLOAD EBOOK

We have developed a rapid radiochemical procedure for the isolation and purification of /sup 235m/U (t12 = 26 minutes) from 239Pu samples up to 250 mg. Purpose of developing the procedure was to measure the thermal neutron fission cross section of the isomeric meta state of 235U. We used rapid small-scale anion exchange columns that absorbed uranium in concentrated HBr but did not absorb plutonium. Uranium was easily eluted with very dilute HF. The separation time required 25 to 35 minutes. We were able to attain a separation factor of uranium from plutonium of approximately 1 x 101° with samples ranging from 1 x 101° to 3 x 1011. The ratio of the fission cross sections for the meta to ground state was measured to be 1.42. 4 figs., 1 tab.

Radiochemical Method Development
Radiochemical Method Development

Author:

Publisher:

Published: 1994

Total Pages: 8

ISBN-13:

DOWNLOAD EBOOK

The authors have developed methods for chemical characterization of the environment under a multitask project that focuses on improvement of radioanalytical methods with an emphasis on faster and cheaper routine methods. The authors have developed improved methods for separation of environmental levels of technetium-99, radium, and actinides from soil and water; separation of actinides from soil and water matrix interferences; and isolation of strontium. They are also developing methods for simultaneous detection of multiple isotopes (including nonradionuclides) by using a new instrumental technique, inductively coupled plasma-mass spectrometry (ICP-MS). The new ICP-MS methods have greater sensitivity and efficiency and could replace many radiometric techniques. They are using flow injection analysis to integrate and automate the separation methods with the ICP-MS methodology. The final product of all activities will be methods that are available (published in the U.S. Department of Energy's analytical methods compendium) and acceptable for use in regulatory situations.