Christian Forssen

Biträdande professor at Chalmers, Physics, Subatomic and Plasma Physics

Christian Forssén is Professor in theoretical physics at the division of Subatomic and Plasma Physics, Department of Physics.Christian performs research in theoretical nuclear and particle physics. He uses advanced computational tools, such as machine learning, to address basic-science questions within low-energy QCD and the theory pf nuclear forces, nuclear and particle astrophysics. A complete list of publications, including bibliometric information, is available via profile pages on Google scholar or via inSPIRE.Read more about Christian's research at the Theoretical Subatomic Physics group web site.

Source: chalmers.se

Projects

2014–2019

Discovering Dark Matter Particles in the Laboratory

Christian Forssen Subatomic and Plasma Physics
Knut and Alice Wallenberg Foundation

2013–2017

Climbing the quantum ladder

Christian Forssen Subatomic and Plasma Physics
The Swedish Foundation for International Cooperation in Research and Higher Education (STINT)

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Publications

2017

Ab initio nuclear response functions for dark matter searches

Daniel Gazda, Riccardo Catena, Christian Forssen
Physical Review D. Vol. 95 (10), p. Article Number: 103011-
Journal article
2017

Three-Body Halo States in Effective Field Theory: Renormalization and Three-Body Interactions in the Helium-6 System

EMIL RYBERG, Christian Forssen, Lucas Platter
Few-Body Systems. Vol. 58 (4), p. Article no. UNSP 143-
Journal article
2017

Ab initio no-core solutions for Li-6

Ik Jae Shin, Youngman Kim, Pieter Maris et al
Journal of Physics G: Nuclear and Particle Physics. Vol. 44 (7), p. Article Number: 075103-
Journal article
2016

Neutron and weak-charge distributions of the Ca-48 nucleus

G. Hagen, A. Ekstrom, Christian Forssen et al
Nature Physics. Vol. 12 (2), p. 186-190
Journal article
2016

Experimental study of the O-15(2p, gamma) Ne-17 cross section by Coulomb Dissociation for the rp process

J. Marganiec, F. Wamers, F. Aksouh et al
Journal of Physics: Conference Series. Vol. 665
Journal article
2016

Range corrections in proton halo nuclei

EMIL RYBERG, Christian Forssen, H. W. Hammer et al
Annals of Physics. Vol. 367, p. 13-32
Journal article
2016

Fast and Accurate Evaluation of Wigner 3j, 6j, and 9j Symbols Using Prime Factorization and Multiword Integer Arithmetic

Håkan T Johansson, Christian Forssen
SIAM Review. Vol. 38 (1), p. A376-A384
Journal article
2016

Uncertainty Analysis and Order-by-Order Optimization of Chiral Nuclear Interactions

Boris Karlsson, A. Ekstrom, Christian Forssen et al
Physical Review X. Vol. 6 (1)
Journal article
2016

Uncertainty quantification for proton-proton fusion in chiral effective field theory

B. Acharya, Boris Karlsson, Andreas Ekström et al
Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics. Vol. 760, p. 584-589
Journal article
2015

Infrared length scale and extrapolations for the no-core shell model

K. A. Wendt, Christian Forssen, T. Papenbrock et al
Physical Review C - Nuclear Physics. Vol. 91 (6), p. Art. no. 061301-
Journal article
2015

Tunneling theory for tunable open quantum systems of ultracold atoms in one-dimensional traps

Rikard Lundmark, Christian Forssen, Jimmy Rotureau
Physical Review A - Atomic, Molecular, and Optical Physics. Vol. 91 (4)
Journal article
2015

Infrared length scale and extrapolations for the no-core shell model

K. A. Wendt, Christian Forssen, T. Papenbrock et al
Physical Review C - Nuclear Physics. Vol. 91 (6), p. Art. no. 061301-
Journal article
2015

Statistical uncertainties of a chiral interaction at next-to-next-to leading order

A. Ekstrom, Boris Karlsson, K. A. Wendt et al
Journal of Physics G: Nuclear and Particle Physics. Vol. 42 (3)
Journal article
2015

Accurate nuclear radii and binding energies from a chiral interaction

A. Ekstrom, G. R. Jansen, K. A. Wendt et al
Physical Review C - Nuclear Physics. Vol. 91 (5)
Journal article
2015

Strongly Interacting Few-Fermion Systems in a Trap

Christian Forssen, Rikard Lundmark, Jimmy Rotureau et al
Few-Body Systems. Vol. 56 (11-12), p. 837-844
Journal article
2015

Quantum magnetism in strongly interacting one-dimensional spinor Bose systems

A. Dehkharghani, A. G. Volosniev, Jonathan Lindgren et al
Scientific Reports. Vol. 5
Journal article
2014

Effective field theory for proton halo nuclei

EMIL RYBERG, Christian Forssen, H. W. Hammer et al
Physical Review C - Nuclear Physics. Vol. 89 (1)
Journal article
2014

Fermionization of two-component few-fermion systems in a one-dimensional harmonic trap

E. J. Lindgren, Jimmy Rotureau, Christian Forssen et al
New Journal of Physics. Vol. 16
Journal article
2014

Microscopic description of translationally invariant core+N+N overlap functions

DANIEL SÄÄF, Christian Forssen
Physical Review C - Nuclear Physics. Vol. 89 (1), p. 011303-
Journal article
2014

STUDY OF THE O-15(2p,gamma)Ne-17 CROSS SECTION BY COULOMB DISSOCIATION OF Ne-17 FOR THE rp PROCESS OF NUCLEOSYNTHESIS

J. Marganiec, F. Wamers, F. Aksouh et al
Acta Physica Polonica, Series B.. Vol. 45 (2), p. 229-234
Paper in proceedings
2014

Microscopic description of translationally invariant core+N+N overlap functions

DANIEL SÄÄF, Christian Forssen
Physical Review C - Nuclear Physics. Vol. 89 (1), p. 011303-
Journal article
2014

Exclusive measurements of nuclear breakup reactions of 17Ne

F. Wamers, J. Marganiec, F. Aksouh et al
Journal of Logic and Computation. Vol. 66
Paper in proceedings
2014

Ab initio no core full configuration approach for light nuclei

Youngman Kim, Ik Jae Shin, Pieter Maris et al
Chiral Symmetry in Hadrons and Nuclei, p. 78-85
Paper in proceedings
2014

Ab initio no core full configuration approach for light nuclei

Youngman Kim, Ik Jae Shin, Pieter Maris et al
International Journal of Modern Physics E. Vol. 23 (7), p. Article no. 1461004 -
Paper in proceedings
2014

Constraining low-energy proton capture on beryllium-7 through charge radius measurements

EMIL RYBERG, Christian Forssen, H. W. Hammer et al
European Physical Journal A. Vol. 50 (11), p. 170-182
Journal article
2013

Living on the edge of stability, the limits of the nuclear landscape

Christian Forssen, G. Hagen, M. Hjorth-Jensen et al
Physica Scripta. Vol. T152 (T152), p. 014022-
Journal article
2013

Coulomb breakup of 17Ne from the viewpoint of nuclear astrophysics

C. Marganiec, F Aksouh, Y Aksyutina et al
Paper in proceedings
2013

Optimized Chiral Nucleon-Nucleon Interaction at Next-to-Next-to-Leading Order

A. Ekstrom, G. Baardsen, Christian Forssen et al
Physical Review Letters. Vol. 110 (19), p. Art. no. 192502-
Journal article
2013

Systematics of 2+ states in C isotopes from the no-core shell model

Christian Forssen, R. Roth, P. Navratil
Journal of Physics G: Nuclear and Particle Physics. Vol. 40 (5), p. 055105-
Journal article
2012

Excited-state transition-rate measurements in C-18

P. Voss, T. Baugher, D. Bazin et al
Physical Review C - Nuclear Physics. Vol. 86 (1)
Journal article
2012

Structure of C-16: Testing shell model and ab initio approaches

M. Petri, S. Paschalis, R. M. Clark et al
Physical Review C - Nuclear Physics. Vol. 86 (4), p. Art. no. 044329-
Journal article
2012

Reorientation-effect measurement of the (2+ 1 Eˆ22+ 1) matrix element in 10Be

J. N. Orce, T. E. Drake, M. K. Djongolov et al
Physical Review C - Nuclear Physics. Vol. 86 (4)
Journal article
2011

The ab initio No-Core Shell Model and Light Nuclei

Christian Forssen, P. Navratil, S. Quaglioni
Few-Body Systems. Vol. 49 (1-4), p. 11-18
Journal article
2011

The similarity renormalization group for three-body interactions in one dimension

O. Åkerlund, E. J. Lindgren, J. Bergsten et al
European Physical Journal A. Vol. 47 (10)
Journal article
2010

The unbound isotopes He-9,He-10

Håkan T Johansson, Yuliya Aksyutina, T. Aumann et al
Nuclear Physics A. Vol. 842, p. 15-32
Journal article
2010

Resonance parameters of the first 1/2+ state in 9Be and astrophysical implications

O. Burda, P. von Neumann-Cosel, A. Richter et al
Physical Review C - Nuclear Physics. Vol. 82 (1)
Journal article
2010

Three-body correlations in the decay of He-10 and Li-13

Håkan T Johansson, Yuliya Aksyutina, T. Aumann et al
Nuclear Physics A. Vol. 847 (1-2), p. 66-88
Journal article
2009

Charge radii and electromagnetic moments of Li and Be isotopes from the ab initio no-core shell model

Christian Forssen, E. Caurier, P. Navrátil
Physical Review C - Nuclear Physics. Vol. 79 (2), p. 021303(R)-
Journal article
2009

Properties of the 7He ground state from 8He neutron knockout

Yuliya Aksyutina, Håkan T Johansson, T. Aumann et al
Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics. Vol. 679 (3), p. 191 - 196
Journal article
2009

Precise branching ratios to unbound 12C states from 12N and 12B [beta]-decays

S. Hyldegaard, Christian Forssen, C. A. Diget et al
Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics. Vol. 678 (5), p. 459 - 464
Journal article
2009

The Ab Initio No-core Shell Model

Christian Forssen, J Christensson, P. Navrátil et al
Few-Body Systems. Vol. 45 (2), p. 111-
Paper in proceedings
2009

Effective-interaction approach to the many-boson problem

J Christensson, Christian Forssen, S Åberg et al
Physical Review A - Atomic, Molecular, and Optical Physics. Vol. 79 (1), p. 012707-
Journal article
2008

Lithium isotopes beyond the drip line

Yu Aksyutina, Håkan T Johansson, P. Adrich et al
Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics. Vol. 666 (5), p. 430-434
Journal article
2008

Surrogate reactions: the Weisskopf-Ewing approximation and its limitations

J. Escher, L. A. Bernstein, J. Burke et al
Proceedings of the International Conference on Nuclear Data for Science and Technology, April 22-27, 2007, Nice, France, editors O.Bersillon, F.Gunsing, E.Bauge, R.Jacqmin, and S.Leray, EDP Sciences, p. 325-329
Paper in proceedings
2008

The [sup 14]C(n,gamma) cross section between 10 keV and 1 MeV

R. Reifarth, M. Heil, Christian Forssen et al
Physical Review C (Nuclear Physics). Vol. 77 (1), p. 015804-
Journal article
2008

Converging sequences in the ab initio no-core shell model

Christian Forssen, J. P. Vary, E. Caurier et al
Physical Review C (Nuclear Physics). Vol. 77 (2), p. 024301-6
Journal article
2007

Systematic investigation of the drip-line nuclei 11Li and 14Be and their unbound subsystems 10Li and 13Be

H. Simon, Mikael Meister, T. Aumann et al
Nuclear Physics A. Vol. 791 (3-4), p. 267-
Journal article
2007

Determining neutron capture cross sections via the surrogate reaction technique

Christian Forssen, F. S. Dietrich, J. Escher et al
Physical Review C - Nuclear Physics. Vol. 75 (5), p. 055807-
Journal article
2007

Surrogate nuclear reaction methods for astrophysics

J. Escher, F. S. Dietrich, Christian Forssen
Nuclear Instruments and Methods in Physics Research B. Vol. 261, p. 1075-1078
Paper in proceedings
2006

Cross sections of light-ion reactions calculated from ab initio wave functions

Christian Forssen, P. Navrátil, W.E. Ormand et al
Proceedings of Science, PoS(NIC-IX), p. 041-
Paper in proceedings
2006

Surrogate Nuclear Reactions - An Indirect Approach to Compound-Nucleus Reactions

J. Escher, L. Ahle, L. A. Bernstein et al
Acta Phys. Hung. A. Vol. 25, p. 211-218
Paper in proceedings
2006

Compound-nuclear reactions via Surrogate measurements

Christian Forssen, F.S. Dietrich, J. Escher et al
Proceedings of Science, PoS(NIC-IX), p. 224-
Paper in proceedings
2006

Direct measurement of stellar neutron capture rates of 14C and comparison with the Coulomb breakup method

R. Reifarth, M. Heil, R. Plag et al
Proceedings of Science, PoS(NIC-IX), p. 223-
Paper in proceedings
2005

Structure of neutron-rich oxygen isotopes

D. Cortina-Gil, J. Fernandez-Vazquez, T. Aumann et al
J. Phys. G. Vol. 31, p. S1629-S1632
Paper in proceedings
2005

Surrogate nuclear reactions: An indirect method for determining reaction cross sections

J. Escher, L. Ahle, L. Bernstein et al
J. Phys. G. Vol. 31, p. S1687-S1690
Paper in proceedings
2005

Ab initio no-core shell model calculations using realistic two- and three-body interactions

P. Navrátil, W. E. Ormand, Christian Forssen et al
Euro. Phys. Jour. A. Vol. 25, p. 481-484
Paper in proceedings
2005

Surrogate Nuclear Reactions and the origin of the heavy elements

J. Escher, L. Ahle, L. Bernstein et al
Nucl. Phys. A. Vol. 758, p. 86-89
Paper in proceedings
2005

Theoretical challenges of determining low-energy neutron-capture cross sections via the Surrogate Technique

Christian Forssen, L. Ahle, L. A. Bernstein et al
Nucl. Phys. A. Vol. 758, p. 130-133
Paper in proceedings
2005

Determining neutron capture cross sections with the Surrogate Reaction Technique: Measuring decay probabilities with STARS

J.A. Church, L. Ahle, L.A. Bernstein et al
Nucl. Phys. A. Vol. 758, p. 126-129
Paper in proceedings
2005

Large basis ab initio shell model investigation of 9Be and 11Be

Christian Forssen, P. Navrátil, W. E. Ormand et al
Physical Review C. Vol. 71, p. 044312-
Journal article
2005

One-neutron knockout of O-23

D. Cortina-Gil, J. Fernandez-Vazquez, T. Aumann et al
European Physical Journal A. Vol. 25, p. 343-346
Paper in proceedings
2004

Shell Structure of the Near-Dripline Nucleus 23O

D. Cortina-Gil, J. Fernandez-Vazquez, T. Aumann et al
Phys. Rev. Lett.. Vol. 93, p. 062501-
Journal article
2003

High-energy breakup of 8B

Mikael Meister, D. Cortina-Gil, J. Fernandez-Vazquez et al
Nucl. Phys. A. Vol. 718, p. 431-433
Paper in proceedings
2003

Hyperfine structure of heavy hydrogen-like ions

P. Beiersdorfer, J. R. Crespo López-Urrutia, S. B. Utter et al
Nucl. Inst. Meth. Phys. B. Vol. 205, p. 62-65
Paper in proceedings
2003

Radiative capture and electromagnetic dissociation involving loosely bound nuclei: The 8B example

Christian Forssen, N. B. Shul'gina, Mikhail Zhukov
Phys. Rev. C. Vol. 67, p. 045801-
Journal article
2003

Two- and three-body correlations: breakup of halo nuclei

H. Simon, T. Aumann, M. J. G. Borge et al
Nucl. Phys. A. Vol. 734, p. 17-21
Paper in proceedings
2003

Nuclear and Coulomb breakup of 8B

D. Cortina-Gil, J. Fernandez-Vazquez, F. Attallah et al
Nucl. Phys. A. Vol. 720, p. 3-19
Journal article
2003

Analytical studies of 8B electromagnetic dissociation

Christian Forssen, V.D. Efros, Natalia Shulgina et al
Nucl. Phys. A. Vol. 718, p. 434-436
Paper in proceedings
2002

Experimental evidence for the 8B ground state configuration

D. Cortina-Gil, K. Markenroth, F. Attallah et al
Phys. Lett. B. Vol. 529, p. 36-41
Journal article
2002

Analytical approach to electromagnetic processes in loosely bound nuclei: application to 8B

Christian Forssen, Natalia Shulgina, Mikhail Zhukov
Phys. Lett. B. Vol. 549, p. 79-84
Journal article
2002

Evidence for a new low-lying resonance state in 7He

Mikael Meister, K. Markenroth, D. Aleksandrov et al
Phys. Rev. Lett.. Vol. 88 (10), p. 102501-(4)
Journal article
2002

Analytical E1 strength functions of two-neutron halo nuclei: the 6He example

Christian Forssen, V. D. Efros, Mikhail Zhukov
Nucl. Phys. A. Vol. 697, p. 639-654
Journal article
2002

Analytical E1 strength functions of two-neutron halo nuclei: 11Li and 14Be

Christian Forssen, V. D. Efros, Mikhail Zhukov
Nucl. Phys. A. Vol. 706, p. 48-60
Journal article
2001

Hyperfine structure of hydrogenlike thallium isotopes

Peter Beiersdorfer, Steven B. Utter, Keith L. Wong et al
Phys. Rev. A. Vol. 64, p. 032506-
Journal article
2001

Analysis of decay data from neutron-rich nuclei

U. C. Bergmann, M. J. G. Borge, J. Cederkall et al
European Physical Journal A. Vol. 11 (3), p. 279-284
Journal article
2000

Thallium hyperfine anomaly

M. G. H. Gustavsson, Christian Forssen, A.-M. M\aartensson-Pendrill
Hyperfine Interactions. Vol. 127, p. 347-352
Paper in proceedings
2000

A correlated background in invariant mass spectra of three-body systems

Christian Forssen, Björn Jonson, Mikhail Zhukov
Nucl. Phys. A. Vol. 673, p. 143-156
Journal article
1999

New information on β-delayed neutron emission from 12,14Be

U. Bergmann, Leif Axelsson, M. J. G. Borge et al
Nucl. Phys. A. Vol. 658, p. 129-145
Journal article