14-17 September 2021
America/Los_Angeles timezone

Measurement of the total neutron cross section on argon in the 30 to 70 keV energy range

15 Sep 2021, 14:45
Signal reconstruction and identification (analysis methods, simulations) Signal Reconstruction (2C)


Tyler Erjavec (University of California Davis)


The use of liquid argon as a detection and shielding medium for neutrino and dark matter experiments has made the precise knowledge of the cross section for neutron interactions on argon an important design and operational parameter. Nevertheless, there has been a lingering discrepancy between the total cross-section in the 30-70 keV region given in the Evaluated Nuclear Data File (ENDF) and the single measurement done in the 1990's by an experiment optimized for higher energy. This discrepancy is significant in that the former predicts a large negative resonance in the region while the measurement did not report such a feature, giving rise to significant uncertainty in the penetration depth of neutrons through liquid argon. This talk presents results from the Argon Resonant Transport Interaction Experiment (ARTIE) at the Los Alamos Neutron Science Center (LANSCE), the first dedicated experiment optimized for this energy region. The ARTIE measurement of the total cross-section as a function of energy confirms the existence of a negative resonance in this region, but not quite as deep as the ENDF prediction.

Primary author

Tyler Erjavec (University of California Davis)


Prof. Bob Svoboda (University of California at Davis) Prof. Emilija Pantic (University of California at Davis) Prof. Jingo Wang (South Dakota School of Mines and Technology) Dr John Ullmann (Los Alamos National Laboratory) Julie He (University of California at Davis) Junying Huang (University of California at Davis) Dr Leon Pickard (University of California at Davis) Dr Luca Pagani (University of California at Davis) Dr Michael Mocko (Los Alamos National Laboratory) Prof. Michael Mulhearn (University of California at Davis) Sofia Andringa (Laborat{\'o}rio de Instrumenta{}{\c c}{\~a}o e F{\'i}sica Experimental de Part{\'i}culas) Yashwanth Bezewada (University of California at Davis)

Presentation Materials