Gunnar Thorkildsen
Ekstern tilknyttet UiS
Contact
Telephone: 51831857
Email: gunnar.thorkildsen@uis.no
Room: KE E-533
Department
Faculty of Science and Technology
Department of Mathematics and Physics
Publications
Vitenskapelige publikasjoner
Thorkildsen, Gunnar
(2024)
Analytical models representing X-ray form factors of ions.Acta Crystallographica Section A: Foundations and Advances.
ISSN 2053-2733.
Volum 80.
Hefte 1.
s.129-136.
Thorkildsen, Gunnar
(2023)
New benchmarks in the modelling of X-ray atomic form factors.Acta Crystallographica Section A: Foundations and Advances.
ISSN 2053-2733.
Volum 79.
s.318-330.
Ramsnes, Stian Penev; Larsen, Helge Bøvik; Thorkildsen, Gunnar
(2020)
MaXrd updated with emphasis on model construction and reciprocal-space simulations.Journal of Applied Crystallography.
ISSN 0021-8898.
Volum 53.
Hefte 6.
s.1620-1624.
Zhang, Qiuyuan; Polikarpov, Maxim; Nataliya, Klimova; Larsen, Helge Bøvik; Mathiesen, Ragnvald; Emerich, Hermann; Thorkildsen, Gunnar; Snigireva, Irina; Snigirev, Anatoly
(2019)
Investigation of glitches induced by single-crystal diamond compound refractive lenses based on crystal orientation.AIP Conference Proceedings.
ISSN 0094-243X.
Volum 2054.
Hefte 1.
s.1-6.
DOI: 10.1063/1.5084638
Ramsnes, Stian Penev; Larsen, Helge Bøvik; Thorkildsen, Gunnar
(2019)
Using Mathematica as a platform for crystallographic computing.Journal of Applied Crystallography.
ISSN 0021-8898.
Volum 52.
s.214-218.
Zhang, Qiuyuan; Polikarpov, Maxim; Klimova, Nataliya; Larsen, Helge Bøvik; Mathiesen, Ragnvald; Emerich, Hermann; Thorkildsen, Gunnar; Snigireva, Irina; Snigirev, Anatoly
(2018)
Investigation of `glitches' in the energy spectrum induced by single-crystal diamond compound X-ray refractive lenses.Journal of Synchrotron Radiation.
ISSN 0909-0495.
Volum 26.
s.1-10.
Larsen, Helge Bøvik; Thorkildsen, Gunnar; Nicholson, David Graham; Pattison, Philip
(2016)
Thermal induced structural properties of silver(I) sulphate (Ag2SO4).Crystal Research & Technology.
ISSN 0232-1300.
Volum 51.
Hefte 12.
s.730-737.
Larsen, Helge Bøvik; Thorkildsen, Gunnar; Natland, Sølvi; Pattison, Philip
(2014)
Average crystal structure(s) of the embedded meta stable η′-phase in the Al-Mg-Zn system.Philosophical Magazine.
ISSN 1478-6435.
Volum 94.
Hefte 15.
s.1719-1743.
Thorkildsen, Gunnar; Larsen, Helge Bøvik
(2014)
Crystallography of embedded particles in Al-Mg-Zn alloys. Symmetry analysis.Journal of Applied Crystallography.
ISSN 0021-8898.
Volum 47.
Hefte 5.
s.1736-1748.
Larsen, Helge Bøvik; Thorkildsen, Gunnar; Nicholson, David Graham
(2012)
X-ray attenuation factors in fluorescence intensity emission-effects of finite sample size.Physica Scripta.
ISSN 0031-8949.
Volum 86.
Hefte 6.
Sjølyst-Kverneland, Atle; Hansen, Vidar; Thorkildsen, Gunnar; Larsen, Helge Bøvik; Pattison, P; Li, X.Z.; Gjønnes, Jon
(2011)
Transformations and structures in the Al-Zn-Mg alloy system: A diffraction study using synchrotron radiation and electron precession.Materials Science & Engineering: A.
ISSN 0921-5093.
Volum 528.
Hefte 3.
s.880-887.
Sjølyst-Kverneland, Atle; Hansen, Vidar; Thorkildsen, Gunnar; Larsen, Helge Bøvik; Pattison, Philip; Li, XZ; Gjønnes, Jon
(2010)
Transformations and structures in the Al?Zn?Mg alloy system: A diffraction study using synchrotron radiation and electron precession.Materials Science & Engineering: A.
ISSN 0921-5093.
Thorkildsen, Gunnar; Larsen, Helge Bøvik; Beukes, Jon Are
(2006)
Angle calculations for a three-circle goniostat.
Journal of Applied Crystallography.
ISSN 0021-8898.
Volum 39.
Thorkildsen, Gunnar; Weckert, Edgar; Mo, Frode; Larsen, Helge Bøvik; Mathiesen, Ragnvald
(2005)
Three-beam resonant X-ray diffraction in germanium - Laue transmission cases.
Acta Crystallographica Section A: Foundations of Crystallography.
ISSN 0108-7673.
Volum 61.
s.460-470.
Larsen, Helge Bøvik; Thorkildsen, Gunnar; Weckert, Edgar
(2005)
Three-beam diffraction in an elastically strained crystal plate.
Acta Crystallographica Section A: Foundations of Crystallography.
ISSN 0108-7673.
Volum 61.
s.134-138.
Thorkildsen, Gunnar; Larsen, Helge Bøvik; Weckert, Edgar; Semmingsen, Dag
(2003)
Three-beam X-ray diffraction -- profile analysis.
Journal of Applied Crystallography.
ISSN 0021-8898.
Volum 36.
s.1324-1333.
Thorkildsen, Gunnar; Larsen, Helge Bøvik
(2002)
Three-beam X-ray diffraction in a semi-infinite perfect crystal.
?.
Volum 58.
s.252-258.
Thorkildsen, Gunnar; Larsen, Helge Bøvik; Semmingsen, Dag; Bjaanes, Øystein
(2001)
Generalized extinction in bipyramidal crystals.
?.
Volum 57.
s.201-211.
Thorkildsen, Gunnar; Larsen, Helge Bøvik; Weckert, Edgar
(2001)
Approximate solution of the Takagi-Taupin equations for a semi-infinite crystal in the three-beam Laue-Laue case.
?.
Volum 57.
s.389-394.
Thorkildsen, Gunnar; Larsen, Helge B.; Mathiesen, Ragnvald H.; Mo, Frode
(2000)
Three-beam interference measurements with a six-circle kappa diffractometer.
Journal of Applied Crystallography.
ISSN 0021-8898.
Volum 33.
s.49-51.
Thorkildsen, Gunnar; Larsen, Helge B.
(2000)
Comments on Extinction-Corrected mean thickness and integral width used in the program UMWEG98 by Rossmanith (2000).
Journal of Applied Crystallography.
ISSN 0021-8898.
Volum 33.
Thorkildsen, Gunnar; Mathiesen, Ragnvald H.; Larsen, Helge B.
(1999)
Angle calculations for a six-circle kappa diffractometer.
Journal of Applied Crystallography.
ISSN 0021-8898.
Volum 32.
s.943-950.
Thorkildsen, Gunnar; Larsen, Helge B.; Authier, Andre
(1999)
Nonsymmetrical X-ray diffraction in a perfect rectangular t x l crystal. Extinction and absorption.
?.
Volum A55.
Hefte 1.
s.1-13.
Thorkildsen, Gunnar; Larsen, Helge Bøvik
(1999)
X-ray diffraction in perfect t x l crystals. Rocking curves.
?.
Volum A55.
s.840-854.
Thorkildsen, Gunnar; Larsen, Helge Bøvik
(1999)
X-ray intensity patterns from finite perfect crystals.
?.
Volum A55.
s.1000-1013.
Thorkildsen, Gunnar; Larsen, Helge B.; Authier, Andre
(1998)
Three-Beam Diffraction in Finite Perfect Crystals. I: Exploring Laue-Laue and Bragg-Laue Scattering Using a Series-Expansion Approach for the Solution of the Takagi-Taupin Equations.
?.
Volum A54.
Hefte 1.
s.120-128.
Larsen, Helge B.; Thorkildsen, Gunnar; Authier, Andre
(1998)
Three-Beam Diffraction in Finite Perfect Crystals. II. Influence of Absorption, Resonant Scattering and Polarization.
?.
Volum A54.
Hefte 1.
s.129-136.
Larsen, Helge B.; Thorkildsen, Gunnar; Authier, Andre
(1998)
Three-Beam Diffraction in Finite Imperfect Crystals. An Analysis of Coherent Wavefield Interactions Using Statistical Dynamical Theory.
?.
Volum A54.
Hefte 1.
s.137-145.
Thorkildsen, Gunnar; Larsen, Helge B.; Authier, Andre
(1998)
Primary Extinction in Cylinders and Spheres.
?.
Volum A54.
s.172-185.
Thorkildsen, Gunnar; Larsen, Helge B.; Authier, Andre
(1998)
Absorption and Weighted Path Lengths in Cylinders and Spheres.
?.
Volum A54.
s.186-190.
Thorkildsen, Gunnar; Larsen, Helge B.; Authier, Andre
(1998)
Symmetrical X-ray Diffraction in a Perfect Rectangular t x l Crystal. Extinction and Absorption.
?.
Volum A54.
s.416-429.
Larsen, Helge B.; Thorkildsen, Gunnar; Authier, Andre
(1998)
An exact analytical expression for the primary extinction factor for a perfect spherical crystal in the limit oh->/2.
?.
Volum A54.
s.511-512.
Svare, Ivar; Thorkildsen, Gunnar; Andersson, H.I.; Skjæveland, Svein Magne; Trivijitkasem, P.
(1978)
Proton Relaxation by Tunneling in Ammonium Salts at Low Temperature.
Journal of Physics C: Solid State Physics.
ISSN 0022-3719.
Bøker og kapitler
Thorkildsen, Gunnar; Larsen, Helge Bøvik
(2007)
Crystallography of embedded particles in FCC metal matrices.
Universitetet i Stavanger.
ISBN 9788276443325.
Hefte No. 24.
Thorkildsen, Gunnar; Larsen, Helge Bøvik; Beukes, Jon Are
(2005)
Angle Calculations for a Six Circle Kappa-Diffractometer IV Orientation Matrix.
Universitetet i Stavanger.
ISBN 8276442544.
Hefte 2.
Thorkildsen, Gunnar; Larsen, Helge Bøvik; Beukes, Jon Are
(2004)
Angle Calculations for a six circle kappa-diffractometer. III. psi-rotations and scan procedures.
ISBN 8276442153.
Hefte 131.
Thorkildsen, Gunnar; Larsen, Helge Bøvik
(2002)
Angle Calculations for a Six Circle Kappa-Diffractometer II. General Orientation of Axes.
Universitetet i Stavanger.
ISBN 8276441858.
Hefte 110.
Thorkildsen, Gunnar; Larsen, Helge B.
(1999)
Two Beam Diffraction in Perfect Crystals analyzed by Takagi's Equations. Part 4. Rocking Curves. Mathematica Function Definitions and Notebooks.
Universitetet i Stavanger.
ISBN 82-7644-074-6.
Hefte 53.
Thorkildsen, Gunnar; Larsen, Helge B.; Mathiesen, Ragnvald H.; Mo, Frode
(1998)
Test Experiments with the KUMA6 Diffractometer at the SNBL, EH-2. Project 01-02-115.
Thorkildsen, Gunnar; Mathiesen, Ragnvald H.; Larsen, Helge B.
(1998)
Angle Calculations for a Six-Circle kappa-Diffractometer.
Universitetet i Stavanger.
ISBN 82-7644-065-7.
Hefte 46.
Thorkildsen, Gunnar; Larsen, Helge B.
(1998)
Three-beam Diffraction in Imperfect Crystals.
Universitetet i Stavanger.
ISBN 82-7644-052-5.
Hefte 40.
Thorkildsen, Gunnar; Larsen, Helge B.
(1998)
Two Beam Diffraction in Perfect Crystals Analyzed by Takagi's Equations. Part 3. Rocking Curves and Intensity Distributions.
Universitetet i Stavanger.
ISBN 82-7644-056-8.
Thorkildsen, Gunnar; Larsen, Helge Bøvik
(1997)
Two Beam Diffraction in Perfect Crystals Analyzed by Takagi's Equations. Part 1-Basic Principles and Methods of Solutions.
Universitetet i Stavanger.
ISBN 82-7644-040-1.
Hefte 30.
Thorkildsen, Gunnar; Larsen, Helge Bøvik
(1997)
Two Beam Diffraction in Perfect Crystals Analyzed by Takagi's Equations. Part 2-Function Definitions, Notebooks and Worksheets.
Universitetet i Stavanger.
ISBN 82-7644-042-8.
Hefte 31.
Formidling
Ramsnes, Stian Penev; Larsen, Helge Bøvik; Thorkildsen, Gunnar; Nicholson, David Graham
(2019)
Utilising MaXrd in the Study of Inclusion Compounds.
32nd European Crystallographic Meeting;
2019-08-18 - 2019-08-23.
Thorkildsen, Gunnar; Larsen, Helge Bøvik
(2015)
The atomic anisotropic displacement tensor - completing the picture.Acta Crystallographica Section A: Foundations and Advances.
ISSN 2053-2733.
Volum 71.
s.467 -470.
Hansen, Vidar; Oddsen, Ingunn Cecilie; Kverneland, Atle; Larsen, Helge Bøvik; Pattison, Philip; Thorkildsen, Gunnar; Gjønnes, Jon
(2009)
Diffuse scattering from zones and particles in the Al-Zn-Mg alloy system.
SNBL/ESRF Workshop on Diffuse Scattering;
2009-06-25 - 2009-06-26.
Natland, Sølvi; Larsen, Helge Bøvik; Thorkildsen, Gunnar; Pattison, Philip
(2008)
Diffraction studies of an Al-Mg-Zn single crystal by synchrotron radiation.
XXI Congress of the International Union of Crystallography;
2008-08-23 - 2008-08-31.
Hansen, Vidar; Kverneland, Atle; Li, X.Z.; Thorkildsen, Gunnar; Larsen, Helge Bøvik; Gjønnes, Jon
(2008)
Elektronmikroskopi og synkrotronrøntgen diffraksjonsstudier av transformasjoner og strukturer i 7xxx-legeringer.
29. Metallurgiske Sommermøtet;
2008-05-21 - 2008-05-22.
Hansen, Vidar; Kverneland, Atle; Thorkildsen, Gunnar; Larsen, Helge Bøvik; Vincent, Roger; Gjønnes, Jon
(2007)
Structure analysis of the n'-precipitate in Al-Zn-Mg alloys by the precession technique in electron diffraction and synchrotron radiation.
19Th Nordic Structural Chemistry Meeting;
2007-01-08 - 2007-01-11.
Hansen, Vidar; Kverneland, Atle; Thorkildsen, Gunnar; Larsen, Helge Bøvik; Pattison, Philip; Gilmore, Cristopher; Vincent, Roger; Gjønnes, Jon
(2006)
Structure determination of nanosized semi-coherent Al-Mg-Zn precipitates by precession electron diffraction and synchrotron X-ray diffraction.
23rd European crystallographic Meeting;
2006-08-06 - 2006-08-11.
Larsen, Helge Bøvik; Thorkildsen, Gunnar
(2004)
Kappa six circle diffractometer -- benchmarking.
utenTitteltekst;
2004-05-10.
Larsen, Helge Bøvik; Thorkildsen, Gunnar
(2004)
Three-beam diffraction in imperfect crystals.
utenTitteltekst;
2004-06-23.
Larsen, Helge Bøvik; Thorkildsen, Gunnar
(2004)
Multiple beam diffraction -- the basics, applications and possible developments.
utenTitteltekst;
2004-12-06.
Thorkildsen, Gunnar
(2004)
Fysikklaboratorium -- Forelesningsnotater.
Larsen, Helge Bøvik; Thorkildsen, Gunnar
(2003)
Three-beam X-ray diffraction -- profile analysis.
21st EUROPEAN Crystallographic Meeting.;
2003-08-24 - 2003-08-29.
Thorkildsen, Gunnar; Larsen, Helge Bøvik
(2002)
TE-6254 Materialfysikk.
Universitetet i Stavanger.
Larsen, Helge Bøvik; Thorkildsen, Gunnar
(2001)
Three-beam Diffraction -- Only for Phase-Estimation??.
11'th ESRF User's Meeting;
2001-02-19 - 2001-02-20.
Thorkildsen, Gunnar; Larsen, Helge Bøvik
(2001)
Dynamical scattering of X-rays in finite crystals.
1. Brukermøte norsk Synktrotronforskning;
2001-01-18 - 2001-01-19.
Larsen, Helge Bøvik; Thorkildsen, Gunnar
(2001)
Three-beam Diffraction -- Only for Phase-Estimation ???.
1.Brukermøte norsk Synkrotronforskning;
2001-01-18 - 2001-01-19.
Thorkildsen, Gunnar
(2001)
Spredning av røntgenstråler i krystaller.
utenTitteltekst;
2001-03-08.
Larsen, Helge B.; Thorkildsen, Gunnar
(2000)
Measurements of dynamical diffraction effects in finite crystals.
SNBL -user's meeting No.1. Research highlights.;
Thorkildsen, Gunnar
(1999)
X-ray diffraction in finite perfect crystals.
utenTitteltekst;
Larsen, Helge Bøvik; Thorkildsen, Gunnar
(1999)
Interference Patterns from semi-infinite and finite Crystals.
utenTitteltekst;
Thorkildsen, Gunnar; Larsen, Helge B.
(1998)
Polarization Effects in Three-Beam Diffraction from Small, Finite Crystals.
International School of Crystallography;
Thorkildsen, Gunnar; Larsen, Helge B.
(1998)
Calculating the Integrated Power as a Function of Wavelenght for a Finite Perfect Crystal using MATHEMATICA.
International School of Crystallography;