CALCULATION OF ELECTRON-IMPACT TOTAL, IONIZATION, AND NONBREAKUP CROSS-SECTIONS FROM THE 3S AND 3P STATES OF SODIUM

We present convergent close-coupling calculations of the total, ionization, and nonbreakup cross sections for electron impact of Na 3S and 3P states. We show that the total and nonbreakup cross sections converge rapidly with increasing target orbital angular momentum l(max) used in the close-coupling expansion. The total ionization cross section is less rapidly convergent, and typically has the largest partial contribution from ionization of the l = l(max) states. The total cross sections and total ionization spin asymmetries are in excellent quantitative agreement with experiment. However, the total ionization cross section from the 3S state is approximately a factor of 2 lower.