Blar i Department of Physics and Technology på tittel
Viser treff 1488-1507 av 2112
-
Prompt gamma-ray spectroscopy in conjunction with the Monte Carlo Library Least Squares approach: applications to range verification in proton therapy
(Journal article; Peer reviewed, 2023)Prompt Gamma-ray Spectroscopy (PGS) in conjunction with the Monte Carlo Library Least Squares (MCLLS) approach was investigated for the purposes of range monitoring in proton therapy through Monte Carlo simulations. Prompt ... -
Properties of g→b¯b at small opening angles in pp collisions with the ATLAS detector at √s=13 TeV
(Peer reviewed; Journal article, 2019)The fragmentation of high-energy gluons at small opening angles is largely unconstrained by present measurements. Gluon splitting to b -quark pairs is a unique probe into the properties of gluon fragmentation because ... -
Properties of jet fragmentation using charged particles measured with the ATLAS detector in pp collisions at √s=13 TeV
(Peer reviewed; Journal article, 2019)This paper presents a measurement of quantities related to the formation of jets from high-energy quarks and gluons (fragmentation). Jets with transverse momentum 100 GeV < p T < 2.5 TeV and pseudorapidity | η | < 2.1 from ... -
Properties of Terrestrial Gamma ray Flashes. Modelling and Analysis of BATSE and RHESSI data
(Doctoral thesis, 2012-06-15)This thesis objective is to study Terrestrial Gamma ray Flashes (TGFs), which are short burst (∼ 1 ms) of gamma-radiation from thunderstorms first discovered by Fishman et al. [1994]. The measured photons energies in TGFs ... -
Proton acceleration in thermonuclear nova explosions revealed by gamma rays
(Journal article; Peer reviewed, 2022)Classical novae are cataclysmic binary star systems in which the matter of a companion star is accreted on a white dwarf1,2. Accumulation of hydrogen in a layer eventually causes a thermonuclear explosion on the surface ... -
Proton Beam Test Of A High Granularity Calorimeter For Proton Computed Tomography
(Master thesis, 2015-06-01)Radiation therapy is a non-invasive method of treating cancer. The purpose of it is to stop cancer cells from reproducing properly which will in turn cause the cancer cells to die out. This is achieved by having ionising ... -
Proton computed tomography readout testing and detector design
(Master thesis, 2017-10-11)Proton computed tomography is a way of using protons instead of x-rays to make a three dimensional image of a scanned object. This will result in more accurate predictions for proton treatments and less radiation in the ... -
Pseudorapidity and transverse-momentum distributions of charged particles in proton-proton collisions at \(\mathbf{\sqrt{\textit s}}\) = 13 TeV
(Peer reviewed; Journal article, 2016-02)The pseudorapidity \(\eta\) and transverse-momentum \(p_{\rm T}\) distributions of charged particles produced in proton-proton collisions are measured at the centre-of-mass energy \(\sqrt{s}\) = 13 TeV. The pseudorapidity ... -
Pseudorapidity density of charged particles p-Pb collisions at \(\sqrt{s_{NN}}\) = 5.02 TeV
(Peer reviewed; Journal article, 2013-01)The charged-particle pseudorapidity density measured over 4 units of pseudorapidity in non-single-diffractive (NSD) p-Pb collisions at a centre-of-mass energy per nucleon pair \(\sqrt{s_{NN}}\) = 5.02 TeV is presented. The ... -
Pseudorapidity dependence of the anisotropic flow of charged particles in Pb-Pb collisions at \(\sqrt{s_{\rm NN}}=2.76\) TeV
(Peer reviewed; Journal article, 2016-11)We present measurements of the elliptic \(\mathrm{v}_2\) , triangular \(\mathrm{v}_3\) and quadrangular \(\mathrm{v}_4\) anisotropic azimuthal flow over a wide range of pseudorapidities \(-3.5< \eta < 5\) . The ... -
Pseudorapidity distributions of charged particles as a function of mid- and forward rapidity multiplicities in pp collisions at √s = 5.02, 7 and 13 TeV
(Journal article; Peer reviewed, 2021)The multiplicity dependence of the pseudorapidity density of charged particles in proton–proton (pp) collisions at centre-of-mass energies s√ = 5.02, 7 and 13 TeV measured by ALICE is reported. The analysis relies on track ... -
Purcell-induced suppression of superradiance for molecular overlayers on noble atom surfaces
(Journal article; Peer reviewed, 2022)We study the impact of an environment on the electromagnetic responses of a molecule in the presence of a dielectric medium. By applying the dipole–dipole coupling between the molecule’s and the environment’s degrees of ... -
PVCap as kinetic hydrate inhibitor in gas-water system
(Master thesis, 2009-11-20)In this work, molecular dynamic (MD) simulations were employed on different model systems of practical and theoretical significance to investigate possible mechanisms of kinetic hydrate inhibition. Water/methane interface ... -
p−p, p−Λ, and Λ−Λ correlations studied via femtoscopy in pp reactions at √s=7 TeV
(Peer reviewed; Journal article, 2019-02)We report on the first femtoscopic measurement of baryon pairs, such as p − p , p − Λ , and Λ − Λ , measured by ALICE at the Large Hadron Collider (LHC) in proton-proton collisions at √ s = 7 TeV . This study demonstrates ... -
Quantification of CH4 Hydrate Film Growth Rates in Micromodel Pores
(Journal article; Peer reviewed, 2021)In this paper, we report the growth pattern and the rate of CH4 hydrate in sandstone pores. A high-pressure, water-wet, transparent micromodel with pores resembling a sandstone rock was used to visualize CH4 hydrate formation ... -
Quantification of Cold-Ion Beams in a Magnetic Reconnection Jet
(Journal article; Peer reviewed, 2021)Cold (few eV) ions of ionospheric origin are widely observed in the lobe region of Earth’s magnetotail and can enter the ion jet region after magnetic reconnection is triggered in the magnetotail. Here, we investigate a ... -
Quantifying the Lobe Reconnection Rate During Dominant IMF By Periods and Different Dipole Tilt Orientations
(Journal article; Peer reviewed, 2021)Lobe reconnection is usually thought to play an important role in geospace dynamics only when the Interplanetary Magnetic Field (IMF) is mainly northward. This is because the most common and unambiguous signature of lobe ... -
Quantitative Magnetic Resonance Imaging of Tissue Microvasculature and Microstructure in Selected Clinical Applications
(Doctoral thesis, 2022-06-03)This thesis is based on four papers and aims to establish perfusion and diffusion measurements with magnetic resonance imaging (MRI) in selected clinical applications. While structural imaging provides invaluable geometric ... -
Quantitative Pore-Scale Analysis of CO2 Foam for CCUS
(Master thesis, 2019-12)This experimental thesis is a part of ongoing projects lead by the Reservoir Physics group at the Department of Physics and Technology, University of Bergen. The main objectives of this thesis were to develop image analysis ... -
Quantum control and characterization of ultrafast ionization with orthogonal two-color laser pulses
(Peer reviewed; Journal article, 2020-01-14)We study ultrafast ionization dynamics using orthogonally polarized two-color (OTC) laser pulses involving the resonant “first plus second” (ω + 2ω) scheme. The scheme is illustrated by numerical simulations of the ...