75 citations · 236 across the 21 of their papers we have counts for
21 papers
Finite-spectrum Lorentz integral transform calculation of the He photoabsorption cross section in the no-core shell model
P. Yin, H. T. Zhao, C. Y. Zhai +11
We develop and validate a finite-spectrum implementation of the Lorentz integral transform (LIT) within the \textit{ab initio} no-core shell model (NCSM) for calculating the photoa…
A modern Fortran library for SU(3) coupling and recoupling coefficients
Jakub Herko, Mark A. Caprio, Anna E. McCoy +1
The group has applications in several branches of physics. Many of these applications depend on availability of coupling and recoupling coefficien…
Robust ab initio predictions for dimensionless ratios of E2 and radius observables. II. Estimation of E2 transition strengths by calibration to the charge radius
Mark A. Caprio, Patrick J. Fasano, Pieter Maris
Converged results for E2 observables are notoriously challenging to obtain in ab initio no-core configuration interaction (NCCI) approaches. Matrix elements of the E2 operator are…
Robust ab initio predictions for dimensionless ratios of E2 and radius observables. I. Electric quadrupole moments and deformation
Mark A. Caprio, Pieter Maris, Patrick J. Fasano
Converged results for E2 observables are notoriously challenging to obtain in ab initio no-core configuration interaction (NCCI) approaches. Matrix elements of the E2 operator are…
Direct ab initio calculation of the He nuclear electric dipole polarizability
Peng Yin, Andrey M. Shirokov, Pieter Maris +5
The calculation of nuclear electromagnetic sum rules by directly diagonalizing the nuclear Hamiltonian in a large basis is numerically challenging and has not been performed for $A…
Intruder band mixing in an ab initio description of 12Be
Anna E. McCoy, Mark A. Caprio, Pieter Maris +1
The spectrum of 12Be exhibits exotic features, e.g., an intruder ground state and shape coexistence, normally associated with the breakdown of a shell closure. While previous pheno…
Magnetic moments of nuclei with chiral effective field theory operators
Soham Pal, Shiplu Sarker, Patrick J. Fasano +4
Chiral effective field theory (EFT) provides a framework for obtaining internucleon interactions in a systematically improvable fashion from first principles, while also providi…
Nuclear decay as a probe for physics beyond the Standard Model
M. Brodeur, N. Buzinsky, M. A. Caprio +43
This white paper was submitted to the 2022 Fundamental Symmetries, Neutrons, and Neutrinos (FSNN) Town Hall Meeting in preparation for the next NSAC Long Range Plan. We advocate to…
Robust ab initio prediction of nuclear electric quadrupole observables by scaling to the charge radius
Mark A. Caprio, Patrick J. Fasano, Pieter Maris
Meaningful predictions for electric quadrupole (E2) observables from ab initio nuclear theory are necessary, if the ab initio description of collective correlations is to be confro…
Ab initio estimation of strengths in Li and its neighbors by normalization to the measured quadrupole moment
Mark A. Caprio, Patrick J. Fasano
For electric quadrupole () observables, which depend on the large-distance tails of the nuclear wave function, ab initio no-core configuration interaction (NCCI) calculations c…
Natural orbitals for the ab initio no-core configuration interaction approach
Patrick J. Fasano, Chrysovalantis Constantinou, Mark A. Caprio +2
Ab initio no-core configuration interaction (NCCI) calculations for the nuclear many-body problem have traditionally relied upon an antisymmetrized product (Slater determinant) bas…
Accelerating quantum many-body configuration interaction with directives
Brandon Cook, Patrick J. Fasano, Pieter Maris +2
Many-Fermion Dynamics-nuclear, or MFDn, is a configuration interaction (CI) code for nuclear structure calculations. It is a platform-independent Fortran 90 code using a hybrid MPI…
Remeasuring the anomalously enhanced in
S. L. Henderson, T. Ahn, P. J. Fasano +14
The large reported strength between the ground state and first excited state of $\isotope[8]{Li}$, $B(E2; 2^+ \rightarrow 1^+)= 55(15)\,e^2\fm^4$, presents a puzzl…
Quadrupole moments and proton-neutron structure in p-shell mirror nuclei
M. A. Caprio, P. J. Fasano, P. Maris +1
Electric quadrupole (E2) matrix elements provide a measure of nuclear deformation and related collective structure. Ground-state quadrupole moments in particular are known to high…
Rotational bands beyond the Elliott model
Ryan Zbikowski, Calvin W. Johnson, Anna E. McCoy +2
Rotational bands are commonplace in the spectra of atomic nuclei. Inspired by early descriptions of these bands by quadrupole deformations of a liquid drop, Elliott constructed a d…
Emergent Sp(3,R) dynamical symmetry in the nuclear many-body system from an ab initio description
A. E. McCoy, M. A. Caprio, T. Dytrych +1
Ab initio nuclear theory provides not only a microscopic framework for quantitative description of the nuclear many-body system, but also a foundation for deeper understanding of e…
Ab initio rotation in 10Be
M. A. Caprio, P. J. Fasano, A. E. McCoy +2
Ab initio theory describes nuclei from a fully microscopic formulation, with no presupposition of collective degrees of freedom, yet signatures of clustering and rotation nonethele…
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…
Probing ab initio emergence of nuclear rotation
M. A. Caprio, P. J. Fasano, P. Maris +2
Structural phenomena in nuclei, from shell structure and clustering to superfluidity and collective rotations and vibrations, reflect emergent degrees of freedom. Ab initio theory…
Robust ab initio predictions for nuclear rotational structure in the Be isotopes
M. A. Caprio, P. J. Fasano, J. P. Vary +2
No-core configuration interaction (NCCI) calculations for p-shell nuclei give rise to rotational bands, identified by strong intraband E2 transitions and by rotational patterns for…
Perspectives on Nuclear Structure and Scattering with the Ab Initio No-Core Shell Model
James P. Vary, Pieter Maris, Patrick J. Fasano +1
Nuclear structure and reaction theory are undergoing a major renaissance with advances in many-body methods, strong interactions with greatly improved links to Quantum Chromodynami…