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(ROOT (S (ADVP (RB However)) (, ,) (SBAR (WHADVP (WRB when)) (S (NP (DT a) (JJ beta) (NN particle)) (VP (VBZ is) (VP (VBN emitted))))) (, ,) (NP (DT the) (NN energy)) (VP (VBZ is) (VP (VBN divided) (PP (IN between) (NP (NP (DT the) (NN beta)) (CC and) (NP (DT a) (NN neutrino)))))) (. .)))
However, when a beta particle is emitted, the energy is divided between the beta and a neutrino.
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