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Ionization Energy Losses of Low-Energy Alpha Particles in Methylal

This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Submitted: 2026-07-20
CC BY-NC 4.0 This work is licensed under Creative Commons Attribution–NonCommercial International License (CC BY-NC 4.0).

Abstract

The energy losses of alpha particles have been measured in Methylal gas and compared with the Stopping and Range of Ions in Matter SRIM-2008. The alpha particle energy losses have been experimentally determined for 239Pu α-particle source using a dedicated experimental setup based on low-pressure multi-wire proportional chambers (LPMWPC); such losses are observed to deviate significantly from the calculated ones. The deviations suggested that in the low (≤ 1 MeV) energy region the stopping powers given by SRIM-2013 might be too high of about 5-10%.

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