Roca Maza, XavierIqbal Kousar, Laiba2025-09-092025-09-092025-06https://hdl.handle.net/2445/223057Treballs Finals de Grau de Física, Facultat de Física, Universitat de Barcelona, Curs: 2025, Tutor: Xavier Roca MazaIn the field of astrophysics, the study of neutron stars is often conducted to improve nuclear models. This work evaluates the composition of the outer crust of a cold non-accreting neutron star. The standard approach to the outer crust is considered: nuclei are fixed in a Coulomb lattice surrounded by a Fermi gas of free and degenerate electrons. It is shown that considering electrons as ultra-relativistic is a reasonably accurate approach for our purposes (99.98%). The nuclear composition of the lattice is studied by minimizing the Gibbs energy per baryon using a custom Python program. Additionally, the effect of the variations of the Liquid Drop Mass formula parameters on the crust composition is explored by: 1) calibrating the parameters to different experimental masses; and 2) systematically changing the asymmetry parameter8 p.application/pdfengcc-by-nc-nd (c) Iqbal, 2025http://creativecommons.org/licenses/by-nc-nd/3.0/es/Estels de neutronsEnergia de GibbsTreballs de fi de grauNeutron starsGibbs free energyBachelor's thesesinfo:eu-repo/semantics/bachelorThesisinfo:eu-repo/semantics/openAccess