Benchmark calculations of electromagnetic sum rules with a symmetry-adapted basis and hyperspherical harmonics

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389005%3A_____%2F20%3A00531491" target="_blank" >RIV/61389005:_____/20:00531491 - isvavai.cz</a>
Result on the web
<a href="https://doi.org/10.1103/PhysRevC.102.014320" target="_blank" >https://doi.org/10.1103/PhysRevC.102.014320</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1103/PhysRevC.102.014320" target="_blank" >10.1103/PhysRevC.102.014320</a>

Result language
angličtina
Original language name
Benchmark calculations of electromagnetic sum rules with a symmetry-adapted basis and hyperspherical harmonics
Original language description
We demonstrate the ability to calculate electromagnetic sum rules with the ab initio symmetry-adapted no-core shell model. By implementing the Lanczos algorithm, we compute nonenergy weighted, energy weighted, and inverse energy weighted sum rules for electric monopole, dipole, and quadrupole transitions in He-4 using realistic interactions. We benchmark the results with the hyperspherical harmonics method and show agreement within 2 sigma, where the uncertainties are estimated from the use of the many-body technique. We investigate the dependence of the results on three different interactions, including chiral potentials, and we report on the He-4 electric dipole polarizability calculated in the SA-NCSM that reproduces the experimental data and earlier theoretical outcomes. We also detail a novel use of the Lawson procedure to remove the spurious center-of-mass contribution to the sum rules that arises from using laboratory-frame coordinates. We further show that this same technique can be applied in the Lorentz integral transform method, with a view toward studies of electromagnetic reactions for light through medium-mass nuclei.
Czech name
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Czech description
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Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10301 - Atomic, molecular and chemical physics (physics of atoms and molecules including collision, interaction with radiation, magnetic resonances, Mössbauer effect)

Project
<a href="/en/project/GA16-16772S" target="_blank" >GA16-16772S: Development of symmetry-guided methods for first principle modeling of medium-mass atomic nuclei</a><br>
Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year
2020
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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