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Bound state properties, positron annihilation and hyperfine structure splittings in the four-body positron-helium $$e^{+} [^{3}$$He($$2^{3}S_e$$)] and $$e^{+} [^{4}$$He($$2^{3}S_e$$)] ions

Crossref DOI link: https://doi.org/10.1140/epjd/s10053-025-00990-3

Published Online: 2025-04-24

Published Print: 2025-04

Update policy: https://doi.org/10.1007/springer_crossmark_policy

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