Collision Broadening of Principal Series Lines of Calcium in the Presence of Krypton

Abstract

Total absorption method has been applied to 4s^{2 1}S₀-4snp ¹P₁ (6≤n≤10) and to 4s^{2 1}S₀-3d4p ¹P₁ in calcium in the presence of krypton. The determined rate coefficient for Kr-induced broadening increases from 11 to 59×10⁻⁹ cm³s⁻¹ as n increases from 6 to 9. This result is reproduced well by a calculation based on a classical broadening theory in which the collision interaction is assumed to be a superposition of the polarization potential and the Fermi potential.