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Consortium of Swiss Academic Libraries

Variational approximations in a path integral description of potential scattering

Carron, J. ; Rosenfelder, R.

In: The European Physical Journal A, 2010, vol. 45, no. 2, p. 193-215

Consortium of Swiss Academic Libraries

A Classical Picture of the Role of Vacancies andInterstitials inHelium-4

Ma, Ping ; Pollet, Lode ; Troyer, Matthias ; Zhang, Fu

In: Journal of Low Temperature Physics, 2008, vol. 152, no. 5-6, p. 156-163

Consortium of Swiss Academic Libraries

Asymptotic Completeness for Compton Scattering

Fröhlich, J. ; Griesemer, M. ; Schlein, B.

In: Communications in Mathematical Physics, 2004, vol. 252, no. 1-3, p. 415-476

Université de Fribourg

Taylor dispersion of inorganic nanoparticles and comparison to dynamic light scattering and transmission electron microscopy

A.Urban, Dominic ; M.Milosevic, Ana ; Bossert, David ; Crippa, Federica ; L.Moore, Thomas ; Geers, Christoph ; Balog, Sandor ; Rothen-Rutishauser, Barbara ; Petri-Fink, Alke

In: Colloid and Interface Science Communications, 2018, vol. 22, p. 29–33

Taylor dispersion analysis (TDA) is an analytical method that has so far mainly been utilized to determine the diffusion coefficient of small molecules, and proteins. Due to increasing interest in nanoscience, some research has been done on the applicability of TDA towards characterizing nanoparticles. This work aims to expand this knowledge and give insight into the range for which TDA can...

Université de Fribourg

Hypothesis test of the photon count distribution for dust discrimination in dynamic light scattering

Bossert, David ; Crippa, Federica ; Petri-Fink, Alke ; Balog, Sandor

In: Analytical Chemistry, 2018, vol. 90, no. 6, p. 3656–3660

Users of dynamic light scattering (DLS) are challenged when a sample of nanoparticles (NPs) contains dust. This is a frequently inevitable scenario and a major problem that critically affects the reproducibility and accuracy of DLS measurements. Current methods approach this problem via photon correlation spectroscopy, but remedy exists only for a few special cases. We introduce here a...

Université de Fribourg

Shape and core-excited resonances in thiophene

Loupas, Alexandra ; Regeta, Khrystyna ; Allan, Michael ; Gorfinkiel, Jimena D.

In: The Journal of Physical Chemistry A, 2018, vol. 122, no. 4, p. 1146–1155

We present a comprehensive study of resonance formation in electron collisions with thiophene. Detailed calculations have been performed using the ab initio R-matrix method. Absolute differential cross sections for electron impact excitation up to 18 eV and for two scattering angles, 90 and 135°, have been measured. Agreement between the calculated and measured experimental cross sections is...

Université de Fribourg

Spectral properties from Matsubara Green’s function approach: Application to molecules

Schüler, Michel ; Pavlyukh, Y.

In: Physical Review B, 2018, vol. 97, no. 11, p. 115164

We present results for many-body perturbation theory for the one-body Green's function at finite temperatures using the Matsubara formalism. Our method relies on the accurate representation of the single-particle states in standard Gaussian basis sets, allowing to efficiently compute, among other observables, quasiparticle energies and Dyson orbitals of atoms and molecules. In particular, we...