Browsing Physics by Author "Dingfelder, Michael"
-
Construction of realistic hybrid computational fetal phantoms from radiological images in three gestational ages for radiation dosimetry applications
Makkia, Rasha; Nelson, Keith; Zaidi, Habib; Dingfelder, Michael (2019-10-10)Radiation exposure and associated radiation risks are major concerns for fetal development for pregnant patients who undergo radiation therapy or diagnostic imaging procedures. In order to accurately estimate the radiation ... -
Construction of realistic hybrid computational fetal phantoms from radiological images in three gestational ages for radiation dosimetry applications
Makkia, Rasha; Nelson, Keith; Zaidi, Habib; Dingfelder, Michael (2019-10-10)Radiation exposure and associated radiation risks are major concerns for fetal development for pregnant patients who undergo radiation therapy or diagnostic imaging procedures. In order to accurately estimate the radiation ... -
Electron Emission from Fast Proton and Carbon Ion Interactions with Gold Nanoparticles and Amorphous Solid Water
Hawkins, Wilson (East Carolina University, 2021-07-22)Widely used in the treatment of cancer, radiation therapy delivers a lethal dose of energy to malignant tissue. Modeling the deposition of energy in the interactions of the radiation with biological material is important ... -
Electron Emission from Foils and Biological Materials after Proton Impact
Dingfelder, Michael; Travia, Anderson; McLawhorn, Robert A.; Shinpaugh, Jefferson L.; Toburen, Larry H. (East Carolina University, 2008-10)Electron emission spectra from thin metal foils with thin layers of water frozen on them (amorphous solid water) after fast proton impact have been measured and have been simulated in liquid water using the event-by-event ... -
FETUS PHANTOM CONSTRUCTIONS FOR OVERWEIGHT AND OBESE PREGNANT FEMALES FOR RADIOLOGICAL APPLICATIONS
Makkia, Rasha (East Carolina University, 2019-06-07)Radiation exposure and associated radiation risks are major concerns for fetal development for pregnant patients in general, and in particular for overweight and obese pregnant patients who undergo diagnostic imaging or ... -
Hybrid Computational Pregnant Female Phantom Construction for Radiation Dosimetry Applications
Makkia, Rasha; Nelson, Keith; Dingfelder, Michael; Zaidi, Habib (2022-09-30) -
Interaction cross sections needed for simulation of secondary electron emission spectra from thin metal foils after fast proton impact
Travia, Anderson (East Carolina University, 2009)Monte Carlo simulations of secondary electron emission from thin metal foils after fast proton impact require reliable interaction cross sections with the target under consideration. Total and energy differential inelastic ... -
Optical and dielectric properties of metallic calcium, modeled generalized oscillator strength function of calcium, interaction cross sections of electrons, protons, and alpha particles with calcium
Jorjishvili, Irakli G. (East Carolina University, 2013)An analysis of the optical and the dielectric properties of calcium, determined from the literature, was performed. The optical functions of calcium were used for a calculation of the energy loss function of calcium. The ... -
SAFE HAVENS AND HOT SPOTS: IONIZING RADIATION IN MARTIAN PERMAFROST AND ITS INFLUENCE ON THE SURVIVAL OF ANCIENT LIFE
Osunkwor, Offormata Emmanuel (East Carolina University, 2022-06-20)Permafrost on Mars is considered a primary target for the search for life. On a microscopic scale permafrost is highly non-uniform and the effective radiation dose absorbed by a microbe, and thus its survival probability, ...