Essays about: "beryllium"

Showing result 1 - 5 of 20 essays containing the word beryllium.

  1. 1. The solar abundance of beryllium : constraining the solar problem via non-LTE modelling

    University essay from

    Author : Daria Ogneva; [2023]
    Keywords : atomic processes; radiative transfer; abundance;

    Abstract : Accurately determining the solar abundance of beryllium is a key to calibrate transport processes at the base of convective zone, which in turn is an improvement upon existing solar models and general understanding of the physical processes within the Sun. To determine an abundance, assumptions about the solar atmosphere must be made. READ MORE

  3. 2. Determination of the source strength of an AmBe neutron source and design of flexible holder system for accurate measurements of ionising radiation

    University essay from Uppsala universitet/Tillämpad kärnfysik

    Author : Mathilde Ragot; [2022]
    Keywords : neutron source nuclear physics;

    Abstract : The goal of this project was to determine the source strength of an Americium-Beryllium neutron source by irradiating metal foils of different elements. The irradiated foils were then placed on a High Purity Germanium detector and γ-decay from the decay of the neutron induced reaction products was observed and used to deduce the neutron flux. READ MORE

  4. 3. Critical elements scavenged by secondary gypsum and HFO : Determined by sequential extraction combined with mineralogical studies

    University essay from Luleå tekniska universitet/Geovetenskap och miljöteknik

    Author : Emma Flodin; [2022]
    Keywords : Geochemistry; gypsum; HFO; adsorption; scavenged; critical elements; beryllium; Yxsjöberg; mine waste; Sequential extraction; XRD; SEM-EDS;

    Abstract : The demand for metals is great for the purpose of developing green technologies, and EU has listed 30 metals and minerals that are of critical importance for the maintenance and evolving of today’s society, so called critical materials. However, mining of raw materials generates mine waste which can have adverse effect on human health, ecosystems, and surrounding areas. READ MORE

  5. 4. Characterization of micromotion induced by RF phase shift with photon correlation detection in a Paul trap

    University essay from KTH/Fysik

    Author : Ebba Edqvist; [2022]
    Keywords : Ion trap; Paul trap; Micromotion; Photon correlation detection; Jonfälla; Paul-fälla; Mikrorörelse; Fotonkorrelationsdetektion;

    Abstract : Trapped ions in a Paul trap can experience micromotion on top of the wanted secular motion.Micromotion can for example cause Doppler shifts in spectroscopy measurements, making it important to know the amplitude of the motion. READ MORE

  6. 5. Calibration of a Fast Neutron Time-of-Flight System

    University essay from Lunds universitet/Kärnfysik; Lunds universitet/Fysiska institutionen

    Author : Armando Javier Morales Urrutia; [2021]
    Keywords : Physics and Astronomy;

    Abstract : Future experiments with thermal neutrons at neutron facilities may encounter fast neutrons as sources of background. Understanding fast neutron behavior on an event-by-event basis in a detector is important for these complementary thermal neutron experiments. One way to study fast neutron events is by performing a time-of-flight measurement. READ MORE