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This work has been partially supported by the CNEN/EURATOM contract.
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Ferrero, F., Manfredotti, C., Pasqualini, L. et al. Photoneutrons from4He. Nuovo Cimento B (1965-1970) 45, 273–275 (1966). https://doi.org/10.1007/BF02728650
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DOI: https://doi.org/10.1007/BF02728650