Glass cell with rubidium atoms (IMAGE) ICFO-The Institute of Photonic Sciences Caption Glass cell containing the rubidium metal that are mixed with nitrogen gas and heated up to 105º Celsius. At that high temperature, the metal vaporizes, creating free rubidium atoms that diffuse around inside the cell. Image credit: © ICFO Credit © ICFO Usage Restrictions Credit must be given to the creator. License CC BY Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.