Dilatometers Thermal expansion 4 Anisotropy 2 Cobalt 2 Cobalt gamma irradiation 2 Computer simulation 2 Dilatometric tests 2 Elasticity 2 Electronic structure 2 Free energy 2 Gamma rays 2 Glass transition 2 Irradiation 2 Isotropy 2 Lattice vibrations 2 Mathematical models 2 Microstructure 2 Molecular dynamics 2 Molecular weight 2 Multilayer relaxations 2 Negative thermal expansion 2 Perturbation techniques 2 Polymers 2 Polymethyl methacrylates 2 Specific heat 2 Temperature 2 Testing 2 Thermal stress 2 Thermodynamics 2 Thin films 2