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 หัวเรื่อง:ไม่มีชื่อไทย (ชื่ออังกฤษ : Study of Rutherford Scattering Cross Section via Geant4 Methods) ผู้เขียน: นางรัชนี รุจิวโรดม, รองศาสตราจารย์ ,  Burin Asavapibhop, ภัทร แสงเพ็ง สื่อสิ่งพิมพ์:pdf AbstractThe measurement of alpha scattering from gold was instrumental in developing the model of an atom. Rutherford was able to verify this model by predicting the number of particles scattering at each angle. The Rutherford scattering cross sections were studied using the Geant4 (Geometry and tracking) software. Most of the results from the simulation were found to correspond with the data calculated using the Rutherford scattering formula. The trajectories of alpha particles produced during the reaction could be visualized through the simulation. This research showed that Geant4 can simulate accurately the scattering of charged particles from materials. Moreover, Geant4 can be applied in the simulation of the scattering of other particles from different materials in an elastic collision. The simulation by Geant4 is also beneficial in the physics laboratory since it can assist students in their understanding of Rutherford’s alpha scattering experiments and avoid any unnecessary exposure to radioactive substances. |
หัวเรื่อง:ไม่มีชื่อไทย (ชื่ออังกฤษ : A Simulation of Neutron Scattering via Geant4) ผู้เขียน:นางรัชนี รุจิวโรดม, รองศาสตราจารย์, Burin Asavapibhop, ภัทร แสงเพ็ง สื่อสิ่งพิมพ์:pdf AbstractGeant4 is a program developed by The European Organization for Particle Physics (CERN). This research applied Geant4 in a simulation of neutron scattering in a collimator, and subsequently for the modification of a collimator design for use with a nuclear research reactor. Six different materials were used in the simulation: concrete, iron, lead, bismuth, graphite and boron carbide. Trajectories of neutron particles produced during the reaction could be visualized through the simulation. The effects of the six materials on the kinetic energy of neutrons and the neutron scattering angle were studied. The results showed that iron was the most suitable material for fabrication of the collimator pile for a neutron reactor source with an energy level at 0.025 eV, due to its good neutron-reflecting ability. Boron carbide was not suitable, owing to its ability to absorb neutron particles. |
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