Eur. Phys. J. D (2016) 70: 40
https://doi.org/10.1140/epjd/e2016-60496-y

Regular Article

Study of Rb-vapor coated cells – Atomic diffusion and cell curing process

¹ Institute of Automation and Electrometry of the Siberian Branch of the Russian Academy of Science, Koptyug Ave. 1, 630090 Novosibirsk, Russia
² Novosibirsk State University, Pirogova Street 2, 630090 Novosibirsk, Russia

^a e-mail: atutov@fe.infn.it

Received: 1 September 2015
Received in final form: 24 December 2015
Published online: 23 February 2016

Abstract

We present the results of a study on an optical-resonant cell filled by a vapor of the Rb atoms and coated with a non-stick polydimethylsiloxane (PDMS) polymer. We show that it is possible to define correctly the diffusion coefficient of the atoms in the coating using the geometric parameters of the cell and the vapor density in the cell volume only. The dependence of the diffusion coefficient on the cell curing time is presented. It is shown that the mysterious cell curing process can be explained in terms of the polymerization of the polymer coating by alkali atoms. The anomalous long dwell time of the Rb atoms on the PDMS coating is discussed as well.