Consequently, when the 2 I p i decay energy I Q i SB 2 I p i sb is comparable with Graph HT ht pp, it is possible for diproton correlation to emerge in the overall energy correlation. The observed momentum correlations among the five particles are consistent with two sequential steps of prompt Graph HT ht decay passing through the ground state of SP 16 sp Ne. This is possibly due to the fact that diproton is a subthreshold resonance [[25]], whose decay width Graph HT ht pp is around 0.9 MeV. Nucleon-Nucleon Correlation Experimentally, the nucleon-nucleon correlations of the 4 Graph HT ht state in SP 22 sp Mg and the ground state (Graph HT ht ) in Graph HT ht Mg have been measured. [Extracted from the article]