Abstract:The existence of an excited state in He 4 may be investigated by bombarding these nuclei with a monoenergetic beam of protons and looking for a group of inelastically scattered protons corresponding to excitation of the state. Using this technique at a bombarding energy of 32-Mev, Benveniste and Cork found no evidence of a state in He 4 of excitation energy less than 23 Mev. The 40-Mev beam of the Minnesota proton linear accelerator has been used to extend the search for a state in He 4 to higher excitation en… Show more
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