Ab Initio No Core Shell Model
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: 2005 |
ISBN-10 |
: OCLC:68228218 |
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: 4/5 (18 Downloads) |
Synopsis Ab-Initio No-Core Shell Model by :
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Total Pages |
: 8 |
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: 2010 |
ISBN-10 |
: OCLC:1065887470 |
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: 4/5 (70 Downloads) |
Synopsis The Ab-Initio No-Core Shell Model and Light Nuclei by :
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: 2005 |
ISBN-10 |
: OCLC:68229582 |
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: 4/5 (82 Downloads) |
Synopsis Ab Initio No-Core Shell Model Calculations Using Realistic Two- and Three-Body Interactions by :
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Total Pages |
: 8 |
Release |
: 2007 |
ISBN-10 |
: OCLC:1065955144 |
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Rating |
: 4/5 (44 Downloads) |
Synopsis Symplectic Symmetry and the Ab Initio No-Core Shell Model by :
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Total Pages |
: 12 |
Release |
: 2007 |
ISBN-10 |
: OCLC:727350803 |
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Rating |
: 4/5 (03 Downloads) |
Synopsis Ab Initio and Ab Exitu No-Core Shell Model by :
We outline two complementary approaches based on the no core shell model (NCSM) and present recent results. In the ab initio approach, nuclear properties are evaluated with two-nucleon (NN) and three-nucleon interactions (TNI) derived within effective field theory (EFT) based on chiral perturbation theory (ChPT). Fitting two available parameters of the TNI generates good descriptions of light nuclei. In a second effort, an ab exitu approach, results are obtained with a realistic NN interaction derived by inverse scattering theory with off-shell properties tuned to fit light nuclei. Both approaches produce good results for observables sensitive to spin-orbit properties.
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: Robert Roth |
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Total Pages |
: 4 |
Release |
: 2007 |
ISBN-10 |
: OCLC:180047339 |
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: |
Rating |
: 4/5 (39 Downloads) |
Synopsis Ab Initio Study of 40Ca with an Importance Truncated No-core Shell Model by : Robert Roth
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: 2005 |
ISBN-10 |
: OCLC:68227897 |
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Rating |
: 4/5 (97 Downloads) |
Synopsis Ab Initio Large-Basis No-Core Shell Model by :
We discuss the motivation, theory, and formulation of the ab initio No-Core Shell Model (NCSM). In this method the effective Hamiltonians are derived microscopically from realistic nucleon-nucleon (NN) and theoretical three-nucleon (NNN) potentials, as a function of the finite harmonic-oscillator (HO) basis space. We present converged results for the A = 3 and 4 nucleon systems, which are in agreement with results obtained by other exact methods, followed by results for p-shell nuclei. Binding energies, rms radii, excitation spectra, and electromagnetic properties are discussed. The favorable comparison with available data is a consequence of the underlying NN and NNN interactions rather than a phenomenological fit.
Author |
: Michael Karl Gerhard Kruse |
Publisher |
: Springer Science & Business Media |
Total Pages |
: 135 |
Release |
: 2013-09-05 |
ISBN-10 |
: 9783319013930 |
ISBN-13 |
: 3319013939 |
Rating |
: 4/5 (30 Downloads) |
Synopsis Extensions to the No-Core Shell Model by : Michael Karl Gerhard Kruse
Extensions to the No-Core Shell Model presents three extensions to the No-Core Shell Model (NCSM) that allow for calculations of heavier nuclei, specifically for the p-shell nuclei. The Importance-Truncated NCSM (IT-NCSM) formulated on arguments of multi-configurational perturbation theory selects a small set of basis states from the initially large basis space in which the Hamiltonian is diagonalized. Previous IT-NCSM calculations have proven reliable, however, there has been no thorough investigation of the inherent error in the truncated IT-NCSM calculations. This thesis provides a detailed study of IT-NCSM calculations and compares them to full NCSM calculations to judge the accuracy of IT-NCSM in heavier nuclei. When IT-NCSM calculations are performed, one often needs to extrapolate the ground-state energy from the finite basis (or model) spaces to the full NCSM model space. In this thesis a careful investigation of the extrapolation procedures was performed. On a related note, extrapolations in the NCSM are commonplace, but up to recently did not have the ultraviolet (UV) or infrared (IR) physics under control. This work additionally presents a method that maps the NCSM parameters into an effective-field theory inspired framework, in which the UV and IR physics are treated appropriately. The NCSM is well-suited to describe bound-state properties of nuclei, but is not well-adapted to describe loosely bound systems, such as the exotic nuclei near the neutron drip line. With the inclusion of the Resonating Group Method (RGM), the NCSM / RGM can provide a first-principles description of exotic nuclei and the first extension of the NCSM.
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: 2005 |
ISBN-10 |
: OCLC:68230015 |
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: 4/5 (15 Downloads) |
Synopsis No-Core Shell Model and Reactions by :
There has been a significant progress in ab initio approaches to the structure of light nuclei. Starting from realistic two- and three-nucleon interactions the ab initio no-core shell model (NCSM) can predict low-lying levels in p-shell nuclei. It is a challenging task to extend ab initio methods to describe nuclear reactions. In this contribution, we present a brief overview of the NCSM with examples of recent applications as well as the first steps taken toward nuclear reaction applications. In particular, we discuss cross section calculations of p+[sup 6]Li and [sup 6]He+p scattering as well as a calculation of the astrophysically important [sup 7]Be(p, [gamma])[sup 8]B S-factor.
Author |
: Tomáš Dytrych |
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: 2008 |
ISBN-10 |
: OCLC:314766237 |
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Rating |
: 4/5 (37 Downloads) |
Synopsis Evidence for Symplectic Symmetry in Ab Initio No-core Shell Model Results by : Tomáš Dytrych