Electron-impact excitation of krypton

First-order many-body theory has been used to calculate the differential, integrated, and momentum-transfer cross sections for the electron-impact excitation of the 5s’ ${\left[\mathrm{}\right(1/2\left)\mathrm{}\right]}_1^0$(${}^1$ $P_1$ ), 5s${\left[\mathrm{}\right(3/2\left)\mathrm{}\right]}_1^0$(${}^3$ $P_1$), 5s’ ${\left[\mathrm{}\right(1/2\left)\mathrm{}\right]}_0^0$(${}^3$ $P_0$), and 5s${\left[\mathrm{}\right(3/2\left)\mathrm{}\right]}_2^0$(${}^3$ $P_2$) states of krypton for the incident energies of 20, 30, 50, 60, and 100 eV. Electron-photon coincidence parameters for the optically allowed states have been obtained. The results are compared to available experimental results.