Development of FLUKA Templates for the Modelling of Nuclear De-Excitation Gamma-Ray Line Spectra from Solar Flares

Jul 8, 2021, 7:00 PM
20m
Virtual

Virtual

Connection details will be available soon
Working Group 2: Particle acceleration Working Group 3: Ion studies and Fermi/LAT

Speaker

Mx Raphael Malagoli Thereza (Centro de Rádio-Astronomia e Astrofísica Mackenzie (CRAAM), Escola de Engenharia, Universidade Presbiteriana Mackenzie, São Paulo, Brazil)

Description

The modelling of gamma-ray emission spectra observed in solar flares is
generally carried out via the best-fit of data using a set of independent
templates and functions for the several spectral components produced by the
relevant physical processes (bremsstrahlung of electrons and positrons, nuclear
de-excitation, neutron capture, positron annihilation and decay of pions). In
recent works (Tusnski et al., 2019; MacKinnon et al., 2020), we have
demonstrated the potential of the Monte Carlo package FLUKA as an effective
tool for the simulation of nuclear processes in the context of solar flares, as well
as its capability to implement a self-consistent treatment of the several spectral
components in the energy range from 100’s keV to 100’s MeV. In this work we
use FLUKA to calculate nuclear de-excitation gamma-ray line spectra expected
from solar flare accelerated ion distributions. We implement a simulation
strategy which allows to synthesize photon spectra for primary accelerated ions
with arbitrary energy distributions and chemical abundances. We show model
spectra obtained from a range of assumed primary accelerated ion distributions
which exhibit reliable statistics and energy resolution and are in good
agreement with those obtained using the code developed by Murphy et al.
(2009). From these model spectra we build templates which can be
incorporated into the software package Objective Spectral Executive (OSPEX)
and used in the analysis of solar flare gamma-ray data.

Email raphaelmalagoli@gmail.com

Primary authors

Mx Raphael Malagoli Thereza (Centro de Rádio-Astronomia e Astrofísica Mackenzie (CRAAM), Escola de Engenharia, Universidade Presbiteriana Mackenzie, São Paulo, Brazil) Prof. Sergio Szpigel (Mackenzie Presbyterian University) Alexander MacKinnon (University of Glasgow) Dr Carlos Guillermo Giménez de Castro (Mackenzie Presbyterian University) Paulo Simões (CRAAM/Mackenzie)

Presentation materials