It may be Possible to Improve the Performance of Particle Accelerators by adsorbing Gases or other atoms into their surface

Although it is already known that the adsorption of Nitrogen and Oxygen improves the performance of Particle Accelerators and of Carbon degrades the performance, it may be that the gases and vapors of many other elements can do the same. It may be that Mercury or other metals that can be transformed into a gas or vapor likewise change the performance of Particle Accelerators, by increasing the voltage gradient per meter that the material, such as Niobium can withstand. This Author would like to list those materials and their expected effect.