The Physics Society of Iran Iranian Journal of Physics Research 1682-6957 14 4 2019 11 26 Measuring thermal diffusivity of Au nano-fluid prepared by gamma radiation Measuring thermal diffusivity of Au nano-fluid prepared by gamma radiation 261 266 1102 FA M Raeisi E Shahriari Journal Article 2019 11 26 Thermal diffusivity of Au nanofluid was measured by using a dual beam mode-mismatched thermal lens method. The samples were prepared in various sizes by utilizing the gamma radiation method. In the dual beam mode-mismatched thermal lens, a diode laser (532 nm) was used as an excitation beam and a He-Ne laser with the beam output at 632.8 nm was used as a probe beam. Thermal diffusivity of gold nano-fluid increased with the increasing particle sizes ranging from 12.4 to 33 nm Thermal diffusivity of Au nanofluid was measured by using a dual beam mode-mismatched thermal lens method. The samples were prepared in various sizes by utilizing the gamma radiation method. In the dual beam mode-mismatched thermal lens, a diode laser (532 nm) was used as an excitation beam and a He-Ne laser with the beam output at 632.8 nm was used as a probe beam. Thermal diffusivity of gold nano-fluid increased with the increasing particle sizes ranging from 12.4 to 33 nm https://ijpr.iut.ac.ir/article_1102_c667d53acd899a97a85de0c201ba99be.pdf