|
Home |
| Browse | |
|
|
Communities & Collections |
|
|
Issue Date |
|
|
Author |
|
|
Title |
|
|
Subject |
| Sign on to: | |
|
|
Receive email updates |
|
|
My APO authorized users |
|
|
Edit Profile |
|
|
|
|
|
About DSpace |
ANSTO Publications Online >
Conference Publications >
Conference Publications >
Please use this identifier to cite or link to this item:
http://apo.ansto.gov.au/dspace/handle/10238/4139
|
| Title: | Measurement of Pu and U isotopes on the 1 MV AMS system at the Centro |
| Authors: | Chamizo, E García-León, M García-Tenorio, R Hotchkis, M |
| Keywords: | ISOTOPES URANIUM 236 ACTINIDES Plutonium MASS DISTRIBUTION DETECTION |
| Issue Date: | 24-Mar-2011 |
| Publisher: | 12th International Conference on Accelerator Mass Spectrometry (AMS-12) |
| Citation: | Chamizo, E., García-León, M., García-Tenorio. R, Hotchkis, M., (2011). Measurement of Pu and U isotopes on the 1 MV AMS system at the Centro. 12th International Conference on Accelerator Mass Spectrometry (AMS 12), 20th - 25th March 2011. Museum of New Zealand: Te Papa Tongarewa, Wellington, New Zealand. |
| Abstract: | In the last decade, compact AMS systems have demonstrated their potential to measure actinides (236U, 239,240,244Pu, 237Np). With an appropriate detection system, kinematic filters with enough mass resolution, and a simple chemical procedure, the determination of plutonium isotopes and 237Np at environmental levels is currently possible with this new generation of facilities with even better performance than with conventional AMS systems. However, the measurement of 236U (T1/2=23.4 My), produced by neutron capture on 235U, is still a challenge, due to the interference caused by 235U and 238U. In this work, we will explore the possibilities that the 1 MV AMS system at the CNA offers for the measurement of uranium isotopes at environmental levels, in terms of detection limit, efficiency, and precision. Considering the very promising 239Pu/238U mass suppression factor achieved with our system, of about 10-9, a limiting 236U/238U atomic ratio of about 10-11 was expected, approaching the levels expected in natural uranium. However, to date, only the 10-9 level has been obtained, possibly due to the lack of an appropriate uranium material. Currently, different natural uranium materials are being studied, in order to elucidate the origin of the interference. On the other hand, we will discuss the status of the plutonium measurements at our facility, based on the experience we have accumulated in recent years from the analysis of different matrixes over a wide range of plutonium concentrations.Copyright (c) 2011 AMS12. |
| URI: | http://www.gns.cri.nz/ams12/ams12_programme.html#Schedule http://apo.ansto.gov.au/dspace/handle/10238/4139 |
| Appears in Collections: | Conference Publications |
Files in This Item: There are no files associated with this item. |
Items in APO are protected by copyright, with all rights reserved, unless otherwise indicated.
|
DSpace Software Copyright © 2002-2010 Duraspace - Feedback |