Recombination of chlorine atoms on surfaces. Part 1.—E.s.r. studies with pyrex, silica, metal and salt coated surfaces

Abstract

E.s.r. has been used in conjunction with a flow system to measure the surface recombination coefficient, γ_Cl, for Cl(²P) atoms on a variety of surfaces including Pyrex, silica, metal and salt coatings. The values of γ_Cl obtained range from ∼1 × 10^–5 for silica treated with H₂SO₄ or H₃PO₄ to ∼5 × 10^–2 for AgCl.

On a silica surface γ_Cl increases slowly with increase of temperature, and at T∼900 K is about twice the value at 298 K.