Rayan AbdulRahman Alrubaish
Dhahran Ahliyya School, Dammam, Western, SAUDI ARABIA
The 511 KeV line is the first type of gamma rays detected on earth that are emitted as the result of electro-positron annihilation. Since the detection of this line, many explanations have been proposed for the origin of the 511 KeV line. This research examines the origin of the 511 KeV line as radioactivity from stellar nuclei-synthesis through the addition of helium-shell detonation white dwarf supernovae (Type .Ia) to previously made calculations. A Monte Carlo Simulation is utilized to generate random numbers in accordance to the spatial, height, and flux distribution for each type of supernovae. Random numbers were generated for the age and angle of each supernovae. Following, sample galaxies were generated under the range of 300 supernovae per galaxy. COMPTEL gamma-ray maps and the galaxy`s six historical supernovae were employed to compare simulated and historical data for consistency. This study reveals the contribution of Type .Ia supernovae to the amount of positron production in the galaxy. A group of 955 supernovae out of 100,000 has generated 65% of the simulated 511 KeV line flux. The comparison of this data to the simulated data shows the heavy contribution of type .Ia supernovae to the 511 KeV line emissions. In the future, type .Ia supernovae will be studied extensively to detect the special features that enable it to emit a high quantity of positrons. Moreover, research will be developed to determine the cause resulting type .Ia supernovae with an abundance of calcium-44 within the supernovae remnants