QRPA for description of states of multiphonon origin

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21670%2F15%3A00340222" target="_blank" >RIV/68407700:21670/15:00340222 - isvavai.cz</a>
Result on the web
<a href="https://doi.org/10.1063/1.4934911" target="_blank" >https://doi.org/10.1063/1.4934911</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1063/1.4934911" target="_blank" >10.1063/1.4934911</a>

Result language
angličtina
Original language name
QRPA for description of states of multiphonon origin
Original language description
We propose a novel extension of the standard quasiparticle random phase approximation (QRPA) with a new form of phonon operator, which allows to describe also states of multiphonon origin. We denote this method as QRPA with non-linear phonon operator (nlQRPA) and apply it to the proton-neutron Lipkin model. We consider the simplest non-linear extension of a phonon operator where the RPA equation can be transformed into a standard form. That guarantees the orthonormality and completeness of the QRPA states of one-phonon and three-phonon origin. A rather good agreement is found both for energies and beta transition amplitudes with those obtained by a diagonalization of the schematic Hamiltonian. There is straightforward way to extend this approach also for a realistic nuclear structure calculations.
Czech name
—
Czech description
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Project
—
Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year
2015
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Article name in the collection
Workshop on Calculation of Double-Beta-Decay Matrix Elements (MEDEX'15)
ISBN
978-0-7354-1333-7
ISSN
0094-243X
e-ISSN
—
Number of pages
4
Pages from-to
"020022-1"-"020022-4"
Publisher name
AIP Conference Proceedings
Place of publication
New York
Event location
Praha
Event date
Jun 9, 2015
Type of event by nationality
WRD - Celosvětová akce
UT code for WoS article
000371817300022

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