A controlled atmosphere cell for a Mössbauer closed-cycle refrigerator

Abstract

A cell to keep samples in controlled atmosphere for Mössbauer studies of catalysts and small particles is described. The cell keeps the atmosphere of the reactor in which treatments like reduction, chemical reaction, or gas adsorption have been performed on a sample that afterwards is transferred to be studied by Mössbauer spectroscopy at low temperatures. The cell has been adapted to work inside a closed-cycle refrigerator that works in the temperature range 12 - 298 K. Its application is illustrated by studies of Fe small particles supported on in atmosphere.