A high-energy proton collides with a stationary beryllium-9 nucleus, initiating a nuclear reaction that produces a lithium-6 nucleus and a single product particle XXX:
11H+49Be→36Li+X {}^{1}_{1}\text{H} + {}^{9}_{4}\text{Be} \rightarrow {}^{6}_{3}\text{Li} + X 11H+49Be→36Li+XWhat is particle XXX?
a deuteron (12H{}^{2}_{1}\text{H}12H)
a triton (13H{}^{3}_{1}\text{H}13H)
an alpha particle (24He{}^{4}_{2}\text{He}24He)
a helium-3 nucleus (23He{}^{3}_{2}\text{He}23He)