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@inproceedings{rodin:ipac2021-wepab213, author = {V. Rodin and A. Farricker and N. Kumar and C.P. Welsch}, title = {{Optimization of Antiproton-Atom Collision Studies Using GEANT4}}, booktitle = {Proc. IPAC'21}, pages = {3126--3129}, eid = {WEPAB213}, language = {english}, keywords = {proton, antiproton, experiment, simulation, bunching}, venue = {Campinas, SP, Brazil}, series = {International Particle Accelerator Conference}, number = {12}, publisher = {JACoW Publishing, Geneva, Switzerland}, month = {08}, year = {2021}, issn = {2673-5490}, isbn = {978-3-95450-214-1}, doi = {10.18429/JACoW-IPAC2021-WEPAB213}, url = {https://jacow.org/ipac2021/papers/wepab213.pdf}, note = {https://doi.org/10.18429/JACoW-IPAC2021-WEPAB213}, abstract = {{The interaction between antiprotons and hydrogen or helium atoms is a fundamental problem in many-particle atomic physics, attracting strong interest from both theory and experiments. Atomic collisions are ideal to study the three and four-body Coulomb problem as the number of possible reaction channels is limited. Currently, only the total cross-sections of such interactions have been measured in an energy range between keV and a few MeV. This contribution investigates the discrepancies between different theories and available experimental data. It also describes a pathway for obtaining differential cross-sections. A purpose-designed experimental setup is presented and detailed Geant4 simulations provide an insight into the interaction between short (ns) antiproton bunches and a dense gas-jet target.}}, }