TY - JOUR
T1 - Toward laser ablation Accelerator Mass Spectrometry of actinides
AU - Pardo, R. C.
AU - Kondev, F. G.
AU - Kondrashev, S.
AU - Nair, C.
AU - Palchan, T.
AU - Scott, R.
AU - Seweryniak, D.
AU - Vondrasek, R.
AU - Paul, M.
AU - Collon, P.
AU - Deibel, C.
AU - Youinou, G.
AU - Salvatores, M.
AU - Palmotti, G.
AU - Berg, J.
AU - Fonnesbeck, J.
AU - Imel, G.
PY - 2013/1
Y1 - 2013/1
N2 - A project to measure neutron capture cross sections of a number of actinides in a reactor environment by Accelerator Mass Spectrometry (AMS) at the ATLAS facility of Argonne National Laboratory is underway. This project will require the precise and accurate measurement of produced actinide isotopes in many (>30) samples irradiated in the Advanced Test Reactor at Idaho National Laboratory with neutron fluxes having different energy distributions. The AMS technique at ATLAS is based on production of highly-charged positive ions in an electron cyclotron resonance (ECR) ion source followed by acceleration in the ATLAS linac and mass-to-charge (m/q) measurement at the focus of the Fragment Mass Analyzer. Laser ablation was selected as the method of feeding the actinide material into the ion source because we expect it will have higher efficiency and lower chamber contamination than either the oven or sputtering techniques, because of a much narrower angular distribution of emitted material. In addition, a new multi-sample holder/changer to allow quick change between samples and a computer-controlled routine allowing fast tuning of the accelerator for different beams, are being developed. An initial test run studying backgrounds, detector response, and accelerator scaling repeatability was conducted in December 2010. The project design, schedule, and results of the initial test run to study backgrounds are discussed.
AB - A project to measure neutron capture cross sections of a number of actinides in a reactor environment by Accelerator Mass Spectrometry (AMS) at the ATLAS facility of Argonne National Laboratory is underway. This project will require the precise and accurate measurement of produced actinide isotopes in many (>30) samples irradiated in the Advanced Test Reactor at Idaho National Laboratory with neutron fluxes having different energy distributions. The AMS technique at ATLAS is based on production of highly-charged positive ions in an electron cyclotron resonance (ECR) ion source followed by acceleration in the ATLAS linac and mass-to-charge (m/q) measurement at the focus of the Fragment Mass Analyzer. Laser ablation was selected as the method of feeding the actinide material into the ion source because we expect it will have higher efficiency and lower chamber contamination than either the oven or sputtering techniques, because of a much narrower angular distribution of emitted material. In addition, a new multi-sample holder/changer to allow quick change between samples and a computer-controlled routine allowing fast tuning of the accelerator for different beams, are being developed. An initial test run studying backgrounds, detector response, and accelerator scaling repeatability was conducted in December 2010. The project design, schedule, and results of the initial test run to study backgrounds are discussed.
KW - Accelerator Mass Spectrometry
KW - Actinide Mass Spectrometry
KW - ECR ion source
KW - Integral neutron capture cross-section
KW - Laser ablation
KW - Superconducting linear accelerator
UR - http://www.scopus.com/inward/record.url?scp=84870939962&partnerID=8YFLogxK
U2 - 10.1016/j.nimb.2012.01.047
DO - 10.1016/j.nimb.2012.01.047
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AN - SCOPUS:84870939962
SN - 0168-583X
VL - 294
SP - 281
EP - 286
JO - Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms
JF - Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms
ER -