QC426 : Study of the effect of 192Ir source radiations on formation of ZnO nanostractuers
Thesis > Central Library of Shahrood University > Physics > MSc > 2018
Authors:
Abstarct: ionizing radiation, especially heavy ions can cause large changes in the properties of matter. Charged particles that pass through the material, due to Coulomb interactions, bremsstrahlung radiation and nuclear interactions at very high energies lose energy by emitting Cherenkov radiation. . When a high-energy particle such as electrons or ions to hit the target atoms, different effects can happen. The effects are as follows: excitation and ionization of atoms, breaking the lixnks, generating phonons swinging, moving atoms in Bulk targets, sputtering atoms from the surface and photon emission, for example, X-rays. As a result of this method can be used to produce materials with new properties and the development of new structures, for example, nanostructures. Beams of radioactive sources, due to the energy and vitality of Ionizing irradiation can be used in different cases. We used of two flat source 241Am and 137Cs surface Zn in various experiments with different irradiation times. Tests were conducted in three parts. The first part was carried out at a temperature of 30 to 100 ° C. The second test just to see the growth of ZnO nanostructures were performed at 70 ° C. The third experiment in a tube furnace at temperatures of 300, 500, and 700 ° C was carried out, at any stage three on the grill with a sample source 137Cs, the second one with fountains 241Am irradiation and third sample without radiation was used only as a witness. The sample analysis of Raman spectroscopy , XRD, EDAX and FESEM images were used.
Keywords:
#absorbed dose #ZnO nanostructured growth #Geant4 simulator #90Sr Source #Dose edge Slope #Absorbent mask Link
Keeping place: Central Library of Shahrood University
Visitor:
Keeping place: Central Library of Shahrood University
Visitor: