摘要: Abstract Calorimetric investigations have been performed for the molecules and ions that show tunneling in solids adsorbed monolayers. A combination of heat capacity measurement neutron scattering experiment yields valuable information about energy scheme kinetic behavior such as spin conversion. Finding a phase transition those also gives us helpful to understand whole nature phenomena. For ammonium diluted KBr crystal methane on surface graphite, rotational ground state was investigated. The rate conversion between different species determined KBr, graphite solid 4-methylpyridine N-oxide. New transitions were found N-oxide, 1,3,5-tribromo-2,4,6-trimethylbenzene 2,6-dimethylpyridine. hydrogen-bonded Rb3H(SeO4)2 has an excess contribution below 30 K, which may come from proton tunneling.