Microscopic multiphonon approach to nuclei with a valence hole in the oxygen region

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389005%3A_____%2F19%3A00501160" target="_blank" >RIV/61389005:_____/19:00501160 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/00216208:11320/19:10405178

Výsledek na webu

<a href="https://doi.org/10.1103/PhysRevC.99.014316" target="_blank" >https://doi.org/10.1103/PhysRevC.99.014316</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1103/PhysRevC.99.014316" target="_blank" >10.1103/PhysRevC.99.014316</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Microscopic multiphonon approach to nuclei with a valence hole in the oxygen region

Popis výsledku v původním jazyce

An equation of motion phonon method, developed for even nuclei and recently extended to odd systems with a valence particle, is formulated in the hole-phonon coupling scheme and applied to A = 15 and A = 21 isobars with a valence hole. The method derives a set of equations which yield an orthonormal basis of states composed of a hole coupled to an orthonormal basis of correlated n-phonon states (n = 0, 1, 2, . . .), built of constituent Tamm-Dancoff phonons, describing the excitations of a doubly magic core. The basis is then adopted to solve the full eigenvalue problem. The method is formally exact but lends itself naturally to simplifying approximations. Self-consistent calculations using a chiral Hamiltonian in a space encompassing up to two-phonon and three-phonon basis states in A = 21 and A = 15 nuclei, respectively, yield full spectra, moments, electromagnetic and beta-decay transition strengths, and electric dipole cross sections. The analysis of the hole-phonon composition of the eigenfunctions contributes to clarify the mechanism of excitation of levels and resonances and to understand the reasons of the deviations of the theory from the experiments. Prescriptions for reducing these discrepancies are suggested.

Název v anglickém jazyce

Microscopic multiphonon approach to nuclei with a valence hole in the oxygen region

Popis výsledku anglicky

An equation of motion phonon method, developed for even nuclei and recently extended to odd systems with a valence particle, is formulated in the hole-phonon coupling scheme and applied to A = 15 and A = 21 isobars with a valence hole. The method derives a set of equations which yield an orthonormal basis of states composed of a hole coupled to an orthonormal basis of correlated n-phonon states (n = 0, 1, 2, . . .), built of constituent Tamm-Dancoff phonons, describing the excitations of a doubly magic core. The basis is then adopted to solve the full eigenvalue problem. The method is formally exact but lends itself naturally to simplifying approximations. Self-consistent calculations using a chiral Hamiltonian in a space encompassing up to two-phonon and three-phonon basis states in A = 21 and A = 15 nuclei, respectively, yield full spectra, moments, electromagnetic and beta-decay transition strengths, and electric dipole cross sections. The analysis of the hole-phonon composition of the eigenfunctions contributes to clarify the mechanism of excitation of levels and resonances and to understand the reasons of the deviations of the theory from the experiments. Prescriptions for reducing these discrepancies are suggested.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10301 - Atomic, molecular and chemical physics (physics of atoms and molecules including collision, interaction with radiation, magnetic resonances, Mössbauer effect)

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

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2019

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

99

Číslo periodika v rámci svazku

1

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

11

Strana od-do

014316

Kód UT WoS článku

000456777600001

EID výsledku v databázi Scopus

2-s2.0-85060996925