Nuclear Physics Theory
Lead Research Organisation:
University of York
Department Name: Physics
Abstract
To establish a Chair in Nuclear physics theory at the University of York with the overall goal of enhancing the provision of nuclear theory within the UK.
Planned Impact
It is expected that this appointment will both complement the exisiting nuclear theory group work as well as enhance the provision of nuclear physics theory in the UK.
Publications
Shelley M
(2021)
A New Mass Model for Nuclear Astrophysics: Crossing 200 keV Accuracy
in Universe
Pastore A
(2017)
A new statistical method for the structure of the inner crust of neutron stars
in Journal of Physics G: Nuclear and Particle Physics
Baroni S
(2018)
A teaching guide of nuclear physics: the concept of bonds
in Physics Education
Dobaczewski J
(2016)
Ab initio derivation of model energy density functionals
in Journal of Physics G: Nuclear and Particle Physics
Shelley M
(2019)
Advanced Statistical Methods to Fit Nuclear Models
in Acta Physica Polonica B Proceedings Supplement
Diget C
(2017)
Binding blocks: building the Universe one nucleus at a time
in Physics Education
Pastore A
(2020)
Bootstrap analysis of the correlation between neutron skin thickness and the slope of symmetry energy
in International Journal of Modern Physics E
Muir D
(2018)
Bootstrap Technique to Study Correlation Between Neutron Skin Thickness and the Slope of Symmetry Energy in Atomic Nuclei
in Acta Physica Polonica B
Chamel N
(2015)
Brussels--Montreal Nuclear Energy Density Functionals, from Atomic Masses to Neutron Stars
in Acta Physica Polonica B
Marsh B
(2018)
Characterization of the shape-staggering effect in mercury nuclei
in Nature Physics
Dobaczewski J
(2018)
Correlating Schiff moments in the light actinides with octupole moments
Dobaczewski J
(2018)
Correlating Schiff Moments in the Light Actinides with Octupole Moments.
in Physical review letters
Oishi T
(2017)
Dependence of two-proton radioactivity on nuclear pairing models
in Physical Review C
Davesne D
(2017)
Does the Gogny Interaction Need a Third Gaussian?
in Acta Physica Polonica B
Davesne D
(2015)
Effect of three-body forces on response functions in infinite neutron matter
in Physical Review C
Bashkanov M
(2019)
Electromagnetic properties of the d * ( 2380 ) hexaquark
in Physical Review C
Llewellyn RDO
(2020)
Establishing the Maximum Collectivity in Highly Deformed N=Z Nuclei.
in Physical review letters
Davesne D
(2015)
Extended Skyrme equation of state in asymmetric nuclear matter
in Astronomy & Astrophysics
Davesne D
(2015)
Extended Skyrme pseudopotential deduced from infinite nuclear matter properties
in Physical Review C
Pastore A
(2021)
Extrapolating from neural network models: a cautionary tale
in Journal of Physics G: Nuclear and Particle Physics
Romero A
(2020)
Finite-range separable pairing interaction in Cartesian coordinates
in Journal of Physics: Conference Series
Bender M
(2020)
Future of nuclear fission theory
in Journal of Physics G: Nuclear and Particle Physics
Sinclair L
(2019)
Half-lives of Sr 73 and Y 76 and the consequences for the proton dripline
in Physical Review C
Pastore A
(2015)
Heat capacity of low-density neutron matter: from quantum to classical regimes
in Monthly Notices of the Royal Astronomical Society
Vilén M
(2019)
High-precision mass measurements and production of neutron-deficient isotopes using heavy-ion beams at IGISOL
in Physical Review C
Shelley M
(2020)
How accurately can the Extended Thomas-Fermi method describe the inner crust of a neutron star?
in Journal of Physics: Conference Series
Neill D
(2020)
Impact of error analysis on the composition the outer crust of a neutron star
in Journal of Physics: Conference Series
Konki J
(2018)
In-beam spectroscopic study of Cf 244
in Physical Review C
Davesne D
(2016)
Infinite matter properties and zero-range limit of non-relativistic finite-range interactions
in Annals of Physics
Nichols M
(2023)
Investigating radioactive negative ion production via double electron capture
in Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms
Baczyk P
(2019)
Isobaric multiplet mass equation within nuclear density functional theory
in Journal of Physics G: Nuclear and Particle Physics
Baczyk P
(2018)
Isospin-symmetry breaking in masses of N?Z nuclei
in Physics Letters B
Idini A
(2017)
Landau parameters for energy density functionals generated by local finite-range pseudopotentials
in Journal of Physics G: Nuclear and Particle Physics
Pastore A
(2015)
Linear response of homogeneous nuclear matter with energy density functionals
in Physics Reports
Davesne D
(2019)
Linear Response Theory for the Gogny Interaction
in Acta Physica Polonica B Proceedings Supplement
Davesne D
(2019)
Linear response theory in asymmetric nuclear matter for Skyrme functionals including spin-orbit and tensor terms. II. Charge exchange
in Physical Review C
Davesne D
(2020)
Linear Response Theory with finite-range interactions
Davesne D
(2021)
Linear response theory with finite-range interactions
in Progress in Particle and Nuclear Physics
De Groote R
(2024)
Measurements of binding energies and electromagnetic moments of silver isotopes - A complementary benchmark of density functional theory
in Physics Letters B
Chen M
(2021)
Microscopic origin of reflection-asymmetric nuclear shapes
in Physical Review C
Baczyk P
(2017)
Mirror and Triplet Displacement Energies Within Nuclear DFT: Numerical Stability
in Acta Physica Polonica B
Salvioni G
(2020)
Model nuclear energy density functionals derived from ab initio calculations
in Journal of Physics G: Nuclear and Particle Physics
Sadhukhan J
(2015)
Multidimensional Skyrme-density-functional Study of the Spontaneous Fission of $^{238}$U
in Acta Physica Polonica B
Description | We extended the nuclear Density Functional Theory (DFT) by including proton-neutron mixing and contact isospin-symmetry-breaking (ISB) terms up to next-to-leading order (NLO). Within this formalism, we performed systematic study of the nuclear mirror and triple displacement energies, or equivalently of the Isobaric Multiplet Mass Equation (IMME) coefficients. By comparing results with those obtained within the existing Green Function Monte Carlo (GFMC) calculations, we addressed the fundamental question of the physical origin of the ISB effects. This we achieved by analysing separate contributions to IMME coefficients coming from the electromagnetic and nuclear ISB terms. We showed that the ISB DFT and GFMC results agree reasonably well, and that they describe experimental data with a comparable quality. Since the separate electromagnetic and nuclear ISB contributions also agree, we concluded that the beyond-mean-field electromagnetic effects may not play a dominant role in describing the ISB effects in finite nuclei. Elucidating the appropriate microscopic degrees of freedom within neutron stars remains an open question, which affects nuclear physics, particle physics, and astrophysics. The recent discovery of the first non-trivial dibaryon, the d?(2380), provides a new candidate for an exotic degree of freedom in the nuclear equation of state at high matter densities. Using a relativistic mean-field approach, we have performed the very first study of the equation of state of dense nuclear matter including this new particle. The calculations have shown that that the d?(2380) would appear at densities around three times normal nuclear matter saturation density and comprise around 20% of the matter in the centre of heavy stars with higher fractions possible in the higher densities of merger processes. The d?(2380) would also reduce the maximum star mass by around 15% and have significant influence on the fractional proton/neutron composition. New possibilities for neutron star cooling mechanisms arising from the d?(2380) have been also predicted. We showed that the measured intrinsic octupole moments of 220Rn, 224Ra, and 226Ra constrain the intrinsic Schiff moments of 225Ra, 221Rn, 223Rn, 223Fr, 225Ra, and 229Pa. The result is a dramatically reduced uncertainty in intrinsic Schiff moments. Direct measurements of octupole moments in odd nuclei will reduce the uncertainty even more. The only significant source of nuclear-physics error in the laboratory Schiff moments will then be the intrinsic matrix elements of the time-reversal noninvariant interaction produced by CP-violating fundamental physics. Those matrix elements are also correlated with octupole moments, but with a larger systematic uncertainty. We proposed to use two-body regularized finite-range pseudopotential to generate nuclear energy density functional (EDF) in both particle-hole and particle-particle channels, which makes it free from self-interaction and self-pairing, and also free from singularities when used beyond mean field. We derived a sequence of pseudopotentials regularized up to next-to-leading order (NLO) and next-to-next-to-leading order (N$^2$LO), which fairly well describe infinite-nuclear-matter properties and finite open-shell paired and/or deformed nuclei. We proposed a simple and manageable method that allows for deriving coupling constants of model energy density functionals (EDFs) directly from ab initio calculations performed for finite fermion systems. A proof-of-principle application allows for linking properties of finite nuclei, determined by using the nuclear nonlocal Gogny functional, to the coupling constants of the quasilocal Skyrme functional. The method does not rely on properties of infinite fermion systems but on the ab initio calculations in finite systems. It also allows for quantifying merits of different model EDFs in describing the ab initio results. |
Exploitation Route | The outcomes of this funding will be used to continue academic research in basic science |
Sectors | Chemicals,Digital/Communication/Information Technologies (including Software),Education |
Description | FiDiPro |
Organisation | University of Jyvaskyla |
Department | Department of Physics |
Country | Finland |
Sector | Academic/University |
PI Contribution | Long-term scientific collaboration and publications |
Collaborator Contribution | Long-term scientific collaboration and publications |
Impact | 10.1103/PhysRevC.97.024306, 10.1088/1361-6471/aa691e, 10.1088/1361-6471/aa5fd7, 10.1016/j.cpc.2017.03.007 |
Start Year | 2007 |
Description | Lyon Claud Bernard |
Organisation | University of Lyon |
Country | France |
Sector | Academic/University |
PI Contribution | Long-term scientific collaboration and publications |
Collaborator Contribution | Long-term scientific collaboration and publications |
Impact | 10.1088/1361-6471/aa691e, 10.1088/1361-6471/aa5fd7 |
Description | MSU Nazarewicz |
Organisation | Michigan State University |
Department | Department of Physics And Astronomy |
Country | United States |
Sector | Academic/University |
PI Contribution | Long-term collaboration and publications |
Collaborator Contribution | Long-term collaboration and publications |
Impact | 10.5506/APhysPolB.46.575 |
Description | Warsaw IFT |
Organisation | University of Warsaw |
Country | Poland |
Sector | Academic/University |
PI Contribution | Long-term scientific collaboration and publications |
Collaborator Contribution | Long-term scientific collaboration and publications |
Impact | 10.1103/PhysRevC.94.024306, 10.1016/j.cpc.2017.03.007, 10.5506/APhysPolB.48.259, 10.1016/j.physletb.2017.12.068 |