75 citations · 532 across the 21 of their papers we have counts for
21 papers
Motivations for Early High-Profile FRIB Experiments
B. Alex Brown, Alexandra Gade, S. Ragnar Stroberg +39
This white paper is the result of a collaboration by those that attended a workshop at the Facility for Rare Isotope Beams (FRIB), organized by the FRIB Theory Alliance (FRIB-TA),…
Towards scalable bound-to-resonance extrapolations for few- and many-body systems
Nuwan Yapa, Sebastian König, Kévin Fossez
In open quantum many-body systems, the theoretical description of resonant states of many particles strongly coupled to the continuum can be challenging. Such states are commonplac…
Eigenvector continuation for emulating and extrapolating two-body resonances
Nuwan Yapa, Kévin Fossez, Sebastian König
The study of open quantum systems (OQSs), i.e., systems interacting with an environment, impacts our understanding of exotic nuclei in low-energy nuclear physics, hadrons, cold-ato…
Perspectives on few-body cluster structures in exotic nuclei
D. Bazin, K. Becker, F. Bonaiti +16
It is a fascinating phenomenon in nuclear physics that states with a pronounced few-body structure can emerge from the complex dynamics of many nucleons. Such halo or cluster state…
Role of quadrupole deformation and continuum effects in the "island of inversion'' nuclei F
Yu-Xuan Luo, K. Fossez, Quan Liu +1
The properties of nuclei in the ``island of inversion'' (IOI) around Z=10 and N=20 are the focus of current nuclear physics research. Recent studies showed that F has a nega…
Density matrix renormalization group description of the island of inversion isotopes F
K. Fossez, J. Rotureau
Recent experiments have confirmed that the neutron-rich isotopes F belong to the so-called island of inversion (IOI), a region of the nuclear chart around and $N=2…
Quantifying alpha clustering in light nuclei from binding energies
K. Fossez
What is the origin of nuclear clustering and how does it emerge from the nuclear interaction? While there is ample experimental evidence for this phenomenon, its theoretical charac…
From bound states to the continuum
Calvin W. Johnson, Kristina D. Launey, Naftali Auerbach +35
This white paper reports on the discussions of the 2018 Facility for Rare Isotope Beams Theory Alliance (FRIB-TA) topical program "From bound states to the continuum: Connecting bo…
Resonant spectra of multipole-bound anions
X. Mao, K. Fossez, W. Nazarewicz
In multipole-bound anions, the excess electron is attached by a short-range multipole potential of a neutral molecule. Such anions are prototypical marginally-bound open quantum sy…
Energy Spectrum of Neutron-Rich Helium Isotopes: Complex Made Simple
K. Fossez, J. Rotureau, W. Nazarewicz
We demonstrate that the intricate energy spectrum of neutron-rich helium isotopes can be straightforwardly described by taking advantage of the low-energy properties of neutron-neu…
Search for excited states in O
M. D. Jones, K. Fossez, T. Baumann +12
Theoretical calculations suggest the presence of low-lying excited states in O. Previous experimental searches by means of proton knockout on F produced no evidence f…
Continuum effects in neutron-drip-line oxygen isotopes
K. Fossez, J. Rotureau, N. Michel +1
The binding-energy pattern along the neutron-rich oxygen chain, governed by an interplay between shell effects and many-body correlations impacted by strong couplings to one- and t…
Can tetraneutron be a narrow resonance?
K. Fossez, J. Rotureau, N. Michel +1
The search for a resonant four-neutron system has been revived thanks to the recent experimental hints reported in Phys. Rev. Lett. \textbf{116}, 052501 (2016). The existence of su…
Single-particle and collective motion in unbound deformed
K. Fossez, J. Rotureau, N. Michel +2
Background: Deformed neutron-rich magnesium isotopes constitute a fascinating territory where the interplay between collective rotation and single-particle motion is strongly affec…
Resonant spectra of quadrupolar anions
K. Fossez, Xingze Mao, W. Nazarewicz +3
In quadrupole-bound anions, an extra electron is attached at a sufficiently large quadrupole moment of a neutral molecule, which is lacking a permanent dipole moment. The nature of…
Gamow shell model description of radiative capture reactions LiBe and LiLi
G. X. Dong, N. Michel, K. Fossez +3
According to standard stellar evolution, lithium abundance is believed to be a useful indicator of the stellar age. However, many evolved stars like red giants show huge fluctuatio…
Astrophysical S-factor for LiBe in the coupled-channel Gamow shell model
G. X. Dong, K. Fossez, N. Michel +1
We have applied the Gamow shell model (GSM) in the coupled-channel representation to study the astrophysical -factor for the proton radiative capture reaction of Li. Reactio…
Nuclear rotation in the continuum
K. Fossez, W. Nazarewicz, Y. Jaganathen +2
Atomic nuclei often exhibit collective rotational-like behavior in highly excited states, well above the particle emission threshold. What determines the e…
Description of the proton and neutron radiative capture reactions in the Gamow shell model
K. Fossez, N. Michel, M. Płoszajczak +2
We formulate the Gamow shell model (GSM) in coupled-channel (CC) representation for the description of proton/neutron radiative capture reactions and present the first application…
Bound and resonance states of the dipolar anion of hydrogen cyanide: competition between threshold effects and rotation in an open quantum system
K. Fossez, N. Michel, W. Nazarewicz +2
Bound and resonance states of the dipole-bound anion of hydrogen cyanide HCN are studied using a non-adiabatic pseudopotential method and the Berggren expansion technique invol…
Bound states of dipolar molecules studied with the Berggren expansion method
K. Fossez, N. Michel, W. Nazarewicz +1
Bound states of dipole-bound negative anions are studied by using a non-adiabatic pseudopotential method and the Berggren expansion involving bound states, decaying resonant states…