Ab initio many-body calculations of nucleon scattering on {sup 4}He, {sup 7}Li, {sup 7}Be, {sup 12}C, and {sup 16}O

Journal Article · Wed Sep 15 00:00:00 EDT 2010 · Physical Review. C, Nuclear Physics

DOI:https://doi.org/10.1103/PHYSREVC.82.034609· OSTI ID:21421039

Navratil, Petr; Quaglioni, Sofia ^[1]; Roth, Robert ^[2]

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1. Lawrence Livermore National Laboratory, P. O. Box 808, L-414, Livermore, California 94551 (United States)
2. Institut fuer Kernphysik, Technische Universitaet Darmstadt, D-64289 Darmstadt (Germany)

We combine a recently developed ab initio many-body approach capable of describing simultaneously both bound and scattering states, the ab initio no-core shell model/resonating-group method (NCSM/RGM), with an importance-truncation scheme for the cluster eigenstate basis and demonstrate its applicability to nuclei with mass numbers as high as 17. By using soft similarity renormalization-group-evolved chiral nucleon-nucleon interactions, we first calculate nucleon-{sup 4}He phase shifts, cross sections, and analyzing powers. Next, we investigate nucleon scattering on {sup 7}Li, {sup 7}Be, {sup 12}C, and {sup 16}O in coupled-channel NCSM/RGM calculations that include low-lying excited states of these nuclei. We check the convergence of phase shifts with the basis size and study A=8,13, and 17 bound and unbound states. Our calculations predict low-lying resonances in {sup 8}Li and {sup 8}B that have not been experimentally clearly identified yet. We are able to reproduce reasonably well the structure of the A=13 low-lying states. However, we find that A=17 states cannot be described without an improved treatment of {sup 16}O one-particle-one-hole excitations and {alpha} clustering.

• OSTI ID: 21421039
• Journal Information: Physical Review. C, Nuclear Physics, Vol. 82, Issue 3; Other Information: DOI: 10.1103/PhysRevC.82.034609; (c) 2010 The American Physical Society; ISSN 0556-2813
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
BERYLLIUM 7
BORON 8
CARBON 12
CHIRALITY
COMPUTERIZED SIMULATION
CONVERGENCE
COUPLED CHANNEL THEORY
CROSS SECTIONS
EXCITATION
EXCITED STATES
HELIUM 4
LITHIUM 7
LITHIUM 8
MANY-BODY PROBLEM
MASS
NUCLEON-NUCLEON INTERACTIONS
NUCLEONS
OXYGEN 16
PHASE SHIFT
POLARIZATION-ASYMMETRY RATIO
RENORMALIZATION
RESONANCE
RESONATING-GROUP METHOD
SCATTERING
SHELL MODELS
ALKALINE EARTH ISOTOPES
BARYON-BARYON INTERACTIONS
BARYONS
BERYLLIUM ISOTOPES
BETA DECAY RADIOISOTOPES
BETA-MINUS DECAY RADIOISOTOPES
BETA-PLUS DECAY RADIOISOTOPES
BORON ISOTOPES
CALCULATION METHODS
CARBON ISOTOPES
DAYS LIVING RADIOISOTOPES
DIMENSIONLESS NUMBERS
ELECTRON CAPTURE RADIOISOTOPES
ELEMENTARY PARTICLES
ENERGY LEVELS
ENERGY-LEVEL TRANSITIONS
EVEN-EVEN NUCLEI
EVEN-ODD NUCLEI
FERMIONS
HADRON-HADRON INTERACTIONS
HADRONS
HELIUM ISOTOPES
INTERACTIONS
ISOTOPES
LIGHT NUCLEI
LITHIUM ISOTOPES
MATHEMATICAL MODELS
MILLISECONDS LIVING RADIOISOTOPES
NUCLEAR MODELS
NUCLEI
ODD-EVEN NUCLEI
ODD-ODD NUCLEI
OXYGEN ISOTOPES
PARTICLE INTERACTIONS
PARTICLE PROPERTIES
RADIOISOTOPES
SIMULATION
STABLE ISOTOPES
VARIATIONAL METHODS