Abstract In this study the experimental data’s from the Nd: YAGQ-switched nanosecond (ns) laser produced Cu plasmas at lower pressure were used. The electron density have been determined from the Stark broadening of an isolated Cu I at 510.55 nm and the electron temperature estimation from the intensity ratio of the same ions stage in our case the Cu I at 510.55 nm and 515.32 nm were used at different time delay. The dominant atomic processes were estimated from the collisional ionisation and radiation processes. A MATLAB code was developed to estimate the dominant atomic processes from the experimentally estimated electron density and temperature. The radiative recombination rate of Cu 2+ and Cu 3+ is greater than that of three-body recombination of Cu 2+ and Cu 3+ . The Cu 0 ionize greatly and results Cu + in the time delay of 601000 ns. These ions later recombine with the electrons as result, the radiative and 3B- recombination radiation greatly contribute to the states.