Essays about: "neutron spectra"

Showing result 1 - 5 of 21 essays containing the words neutron spectra.

1. 1. Towards Automatic Model Atoms from the VALD Atomic Database: from He to U

   University essay from Uppsala universitet/Teoretisk astrofysik

   Author : Samuel Hermansson; [2023]
   Keywords : r-process; nucleosynthesis; kilonovae; VALD;

   Abstract : The ejecta following the collision and merging of two neutron stars (kilonova) are currently considered promising sites for nucleosynthesis of r-process elements. Since the observed kilonova in 2017, GW2017817, astrophysicists have been working to analyze the collected electromagnetic spectra, trying to identify r-process elements. READ MORE

3. 2. Characterisation of the LYCCA Double-Sided Silicon Strip Detectors

   University essay from Lunds universitet/Fysiska institutionen; Lunds universitet/Partikel- och kärnfysik

   Author : Marwan Mohamed; [2023]
   Keywords : DSSD LYCCA HISPEC FAIR Characterisation; Physics and Astronomy;

   Abstract : The goal of this thesis work is to describe the methods used and perform comprehensive testing of the Double-Sided Silicon-Strip Detectors (DSSD) prior to their implementation in the Lund-York-Cologne CAlorimeter (LYCCA) detector. In the framework of this project, the DSSD characterisation was carried out to ensure specification compliance prior to their "in-kind contribution" delivery to the HISPEC experiment at the NUSTAR collaboration. READ MORE

4. 3. Calculation of alpha knock-on neutron spectra from the 2021 JET DT campaign

   University essay from Uppsala universitet/Tillämpad kärnfysik

   Author : Arna Ormsdóttir; [2023]
   Keywords : Thermonuclear fusion; DT plasma; neutron spectra; supra-thermal ions;

   Abstract : A python code was developed to compute the alpha knock-on (AKN) neutron spectrum using two already available computational tools. The code was used to calculate the AKN for a given discharge from the DTE2 JET campaign. Results showed that the beam-target contribution dominated the neutron spectra and obscured the AKN tail. READ MORE

5. 4. Prompt emission in Gamma-ray bursts; Photospheric Radiation from Synchrotron-Like spectra

   University essay from KTH/Fysik

   Author : Erik Vitols; [2022]
   Keywords : Gamma-ray burst; radiation mechanisms: thermal and non-thermal;

   Abstract : Gamma-ray bursts (GRBs) are the most luminous phenomena in the Universe, explosions whoseenergy is generated by supernovae or mergers of dense objects such as neutron stars. The GRBemission is divided into the prompt emission phase characterized by γ-ray radiation and the afterglowof lower energy radiation. READ MORE

6. 5. PHITS simulations for CEvNS experiments at ESS

   University essay from Lunds universitet/Partikel- och kärnfysik; Lunds universitet/Fysiska institutionen

   Author : Jesper Karlsson Gumprecht; [2021]
   Keywords : PHITS; CEvNS; Coherent; ESS; Physics and Astronomy;

   Abstract : Recently the interest for coherent elastic neutrino-nucleus scattering experiments has increased since it is believed that through these experiments, a wide range of new physics, e.g., sterile neutrinos, could be discovered. READ MORE