Microscopic multiphonon approach to spectroscopy in the neutron-rich oxygen region

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F18%3A10386723" target="_blank" >RIV/00216208:11320/18:10386723 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/61389005:_____/18:00488737

Výsledek na webu

<a href="https://doi.org/10.1103/PhysRevC.97.034311" target="_blank" >https://doi.org/10.1103/PhysRevC.97.034311</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1103/PhysRevC.97.034311" target="_blank" >10.1103/PhysRevC.97.034311</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Microscopic multiphonon approach to spectroscopy in the neutron-rich oxygen region

Popis výsledku v původním jazyce

Background: A fairly rich amount of experimental spectroscopic data have disclosed intriguing properties of the nuclei in the region of neutron rich oxygen isotopes up to the neutron dripline. They, therefore, represent a unique laboratory for studying the evolution of nuclear structure away from the stability line. Purpose: We intend to give an exhaustive microscopic description of low and high energy spectra, dipole response, weak, and electromagnetic properties of the even O-22 and the odd O-23 and F-23. Method: An equation of motion phonon method generates an orthonormal basis of correlated n-phonon states (n = 0,1,2,...) built of constituent Tamm-Dancoff phonons. This basis is adopted to solve the full eigenvalue equations in even nuclei and to construct an orthonormal particle-core basis for the eigenvalue problem in odd nuclei. No approximations are involved and the Pauli principle is taken into full account. The method is adopted to perform self-consistent, parameter free, calculations using an optimized chiral nucleon-nucleon interaction in a space encompassing up to two-phonon basis states. Results: The computed spectra in O-22 and O-23 and the dipole cross section in O-22 are in overall agreement with the experimental data. The calculation describes poorly the spectrum of F-23. Conclusions: The two-phonon configurations play a crucial role in the description of spectra and transitions. The large discrepancies concerning the spectra of F-23 are ultimately traced back to the large separation between the Hartree-Fock levels belonging to different major shells. We suggest that a more compact single particle spectrum is needed and can be generated by a new chiral potential which includes explicitly the contribution of the three-body forces.

Název v anglickém jazyce

Microscopic multiphonon approach to spectroscopy in the neutron-rich oxygen region

Popis výsledku anglicky

Background: A fairly rich amount of experimental spectroscopic data have disclosed intriguing properties of the nuclei in the region of neutron rich oxygen isotopes up to the neutron dripline. They, therefore, represent a unique laboratory for studying the evolution of nuclear structure away from the stability line. Purpose: We intend to give an exhaustive microscopic description of low and high energy spectra, dipole response, weak, and electromagnetic properties of the even O-22 and the odd O-23 and F-23. Method: An equation of motion phonon method generates an orthonormal basis of correlated n-phonon states (n = 0,1,2,...) built of constituent Tamm-Dancoff phonons. This basis is adopted to solve the full eigenvalue equations in even nuclei and to construct an orthonormal particle-core basis for the eigenvalue problem in odd nuclei. No approximations are involved and the Pauli principle is taken into full account. The method is adopted to perform self-consistent, parameter free, calculations using an optimized chiral nucleon-nucleon interaction in a space encompassing up to two-phonon basis states. Results: The computed spectra in O-22 and O-23 and the dipole cross section in O-22 are in overall agreement with the experimental data. The calculation describes poorly the spectrum of F-23. Conclusions: The two-phonon configurations play a crucial role in the description of spectra and transitions. The large discrepancies concerning the spectra of F-23 are ultimately traced back to the large separation between the Hartree-Fock levels belonging to different major shells. We suggest that a more compact single particle spectrum is needed and can be generated by a new chiral potential which includes explicitly the contribution of the three-body forces.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10304 - Nuclear physics

Projekt

<a href="/cs/project/GA16-16772S" target="_blank" >GA16-16772S: Vývoj symetriemi-řízených metod pro modelování středně těžkých atomových jader z prvních principů</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2018

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Physical Review C

ISSN

2469-9985

e-ISSN

—

Svazek periodika

97

Číslo periodika v rámci svazku

3

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

12

Strana od-do

—

Kód UT WoS článku

000426902800001

EID výsledku v databázi Scopus

2-s2.0-85044154945