Excitations of ${}^{1}P$ levels of zinc by electron impact on the ground state

We present results of a joint theoretical and experimental investigation of electron scattering from the $4s^2{}^{1}S$ ground state of zinc. The $4s4p{}^{1}P^o$ and $4s5p{}^{1}P^o$ differential cross sections were measured at scattering angles between 10° and 150° and electron-energies of 15, 20, 25, 40, and 60 eV. Corresponding convergent close-coupling calculations have been performed and are compared with experiment.

Figure 1

Differential cross sections for electron impact excitation of the $4s4p{}^{1}P^o$ state from the ground state of zinc at 10, 15, and 20 eV. The CCC calculations and present experiment are as described in text. The RDWA calculations are due to Kaur et al. [6]. Experiment is due to Panajotović et al. [5].

Figure 2

As for Fig. 1 except for 25, 40, and 60 eV incident energies. Additional experiment is due to Williams and Bozinis [4].

Figure 3

As for Fig. 1 except for 80 and 100 eV incident energies.

Figure 4

Differential cross sections for electron impact excitation of the $4s5p{}^{1}P^o$ state from the ground state of zinc at 20, 25, and 40 eV. Theory and experiment are as for Fig. 2.

Figure 5

Integral cross sections for electron impact excitation of the $4s4p{}^{1}P^o$ state from the ground state of zinc. The CCC and FBA calculations and present experiment are described in text. The $R$-matrix results (BSRM) are due to Zatsarinny and Bartschat [7]. Experiments are due to Shpenik et al. [2] and Williams and Bozinis [4].

Figure 6

Integral cross sections for electron impact excitation of the $4s5p{}^{1}P^o$ state from the ground state of zinc. Experiment and theory are as for Fig. 5.

Figure 7

Generalized oscillator strength for electron impact excitation of the $4s4p{}^{1}P^o$ state of zinc. The FSF of Felfli and Msezane [23] is compared with present CCC and FBA results and 40-eV low-angle data of Panajotović et al. [5].