Abstract
The energy loss of deuterons in 3He gas was measured at E d = 15 to 100 keV using the 3He pressure dependence of the 3He(d,p)4He cross-section at a given incident energy. At the highest energies, the observed energy loss is in good agreement with a standard compilation. However, with decreasing energy the experimental values drop steadily below the theoretical values and near E d = 18 keV they drop sharply (within 1 keV) reaching the domain of nuclear stopping power. This threshold behavior is due to the minimum 1s → 2s electron excitation of the He target atoms, i.e. it is a quantum effect. Some consequences are discussed.
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Communicated by B. Povh
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Formicola, A., Aliotta, M., Gyürky, G. et al. Energy loss of deuterons in 3He gas: a threshold effect. Eur. Phys. J. A 8, 443–446 (2000). https://doi.org/10.1007/s100530050054
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DOI: https://doi.org/10.1007/s100530050054