YorkSpace
YorkSpace is York University's Institutional Repository. It supports York University's Senate Policy on Open Access by providing York community members with a place to preserve their research online in an institutional context.
Communities in YorkSpace
Select a community to browse its collections.
- Previously Faculty of Environmental Studies (FES)
- The Global Labour Research Centre (GLRC) engages in the study of work, employment and labour in the context of a constantly changing global economy.
- Lives Outside the Lines: a Symposium in Honour of Marlene Kadar
- Used only for SWORD Deposit by Adminstrator
- Welcome to WILAA, a gathering place for materials related to research projects that explore work-integrated learning and disability-related accessibility and accommodations.
Recent Submissions
Item type: Item , Access status: Open Access , Distorted-wave models in positron impact ionization of atoms(Elsevier, 2002-05) Campeanu, Radu I.; McEachran, R. P.; Stauffer, Allan DanielThis paper compares the best distorted-wave model results with the most recent experimental data in positron ionization of atomic hydrogen and noble gases. The re-calibration of the experimental measurements yields good agreement with our DCPE5 model at high energies for all the target atoms studied.Item type: Item , Access status: Open Access , Few Body Effects in the Electron and Positron Impact Ionization of Atoms(MDPI, 2021-06-09) Campeanu, Radu I.; Parkin, D. T.Triple differential cross sections (TDCS) are presented for the electron and positron impact ionization of inert gas atoms in a range of energy sharing geometries where a number of significant few body effects compete to define the shape of the TDCS. Using both positrons and electrons as projectiles has opened up the possibility of performing complementary studies which could effectively isolate competing interactions that cannot be separately detected in an experiment with a single projectile. Results will be presented in kinematics where the electron impact ionization appears to be well understood and using the same kinematics positron cross sections will be presented. The kinematics are then varied in order to focus on the role of distortion, post collision interaction (pci), and interference effects.Item type: Item , Access status: Open Access , Electron and Positron Impact Ionization of Molecules(MDPI, 2024-07-23) Nagy, Ladislau; Tóth, István; Campeanu, Radu I.We review our group’s most significant results concerning the collision of positrons and electrons with small molecules. Total and triple differential cross sections for the ionization of these targets were calculated in the distorted wave Born approximation using Gaussian molecular orbitals. Different models were tested. The obtained theoretical results reproduced, in most cases, the features observed in the experimental data.Item type: Item , Access status: Open Access , Triple-Differential Cross-Section Calculations for Positron Impact Ionization of Argon(MDPI, 2025-05-04) Campeanu, Radu I.; Bálint, Zsuzsánna; Nagy, LadislauTriple-differential cross-sections for the positron impact ionization of argon were calculated using a distorted-wave Born approximation (DWBA) convoluted to the experimental uncertainties. In almost all of the cases studied, our results agree well with the positions and heights of the experimental peaks.Item type: Item , Access status: Open Access , Electron Impact Ionization of Krypton at Intermediate Energies(MDPI, 2026-07-17) Campeanu, Radu I.; Nagy, LadislauThe distorted-wave approach is applied to electron impact single ionization of krypton. We find that our models CPE4 and DW2 give results which are in fair agreement with the experiments. Both models contain a final state representation which includes the electrostatic repulsion between the ejected electron and the scattered electron.