( This ( ( ( involves ( ( the capture ) ( of ( a neutron ) ) ) ) ( by ( ( the nucleus ) ( of ( ( an atom ) ( resulting ( in ( ( an excess ) ( of ( neutrons ( -LRB- ( ( neutron rich ) -RRB- ) ) ) ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (DT This)) (VP (VBZ involves) (NP (NP (DT the) (NN capture)) (PP (IN of) (NP (DT a) (NN neutron)))) (PP (IN by) (NP (NP (DT the) (NN nucleus)) (PP (IN of) (NP (NP (DT an) (NN atom)) (VP (VBG resulting) (PP (IN in) (NP (NP (DT an) (NN excess)) (PP (IN of) (NP (NP (NNS neutrons)) (PRN (-LRB- -LRB-) (ADJP (RB neutron) (JJ rich)) (-RRB- -RRB-)))))))))))) (. .)))
This involves the capture of a neutron by the nucleus of an atom resulting in an excess of neutrons (neutron rich).
(ROOT (S (NP (NP (DT The) (NN atom)) (PP (IN in) (NP (DT a) (NN neutron)))) (VP (VBZ is) (VP (VBN found) (PP (IN in) (NP (DT the) (DT the) (NN nucleus))))) (. .)))