Initial Tests of Accelerator Mass Spectrometry with the Argonne Gas Filled Analyzer (AGFA) and the commissioning of the MONICA detector

Miss Lauren Callahan1, Dr Philippe Collon, Dr Michael Paul, Dr Melina Avila Coronado, Dr Birger Back, Mr Thomas Bailey, Mr Adam Clark, Mr John Greene, Dr Heshani Jayatissa, C.L. Jiang, Dr Yoav Kashiv, Mr Austin Nelson, Dr Richard Pardo, Dr David Potterveld, Dr K. Ernst Rehm, Dr Rudra Sahoo, Robert Scott, Dr Dariusz Seweryniak, Dr Ivan Tolstukhin, Richard Vondrasek, Dr Anton Wallner

1University Of Notre Dame, South Bend, United States

As the scope of Accelerator Mass Spectrometry (AMS) expands, there is an increased need to research isobaric separation in the medium-heavy mass region. Existing AMS facilities are limited in their ability to separate medium to heavy radioactive nuclei of interest from their neighboring stable isobars, as such measurements require higher energies than available in most facilities. The Argonne Tandem Linac Accelerator System (ATLAS) at Argonne National Laboratory (ANL) can accelerate isotopes to the energies required for the separation of high mass isobars, and the Argonne Gas-Filled Analyzer (AGFA) setup at ATLAS, specifically designed to study heavy, rare isotopes, has the necessary magnetic rigidity to facilitate their measurement. AGFA was commissioned to perform AMS measurements in November, 2019, and successfully separated the stable isobars 92Zr and 92Mo. This measurement demonstrated that this setup can be used successfully for AMS measurements. Since that time, MONICA, an 8-anode ionization chamber that measures both energy loss and position with two sets of split anodes, has been developed to aid in the study of AMS at AGFA and has undergone four commissioning runs at the Nuclear Science Laboratory at the University of Notre Dame utilizing Si, Fe, Zr, and Mn beams. This report will present the 11/2019 AGFA AMS run and the subsequent commissioning runs of the MONICA detector. This work was supported by the U.S. Department of Energy, Office of Nuclear Physics, under Contract No. DE-AC02-06CH11357. This research used resources of ANL’s ATLAS facility, which is a DOE Office of Science User Facility.

This work is supported by the National Science Foundation, Grant No. NSF PHY-2011890 and
Israel Science Foundation, Grant No. 876/19.


Biog to Come

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Nov 17 2021


10:00 am - 10:55 am