[en] On extracting the data obtained from IAEA-NDS-2019, for study the nature of the single proton-neutron reaction and single proton-2 neutron reaction, narrowband range of cross-section area, and energy presence is seen. The narrowband region is seen, when the cross-section area is on decreasing order with increasing the energy of incidence particle. This narrowband helps to exchange the cross-section area of the element in each reaction. The sharpness of the graph in a single proton-neutron reaction shows that vibration energy after absorption of incidence particle on target is absent while in single proton-2 neutron reaction is present due to which the graph of single proton-2 neutron reaction is fattened. The cross-section area of the single proton-2 neutron reaction is greater than the single proton-neutron reaction and energy for the single proton-neutron reaction is less than a single proton-2 neutron reaction. (author)