Spectroscopic properties of .sup.4./sup.He within a multiphonon approach

0555815 - ÚJF 2023 RIV US eng J - Článek v odborném periodiku
De Gregorio, G. - Knapp, F. - Lo Iudice, N. - Veselý, Petr
Spectroscopic properties of ⁴He within a multiphonon approach.
Physical Review C. Roč. 105, č. 2 (2022), č. článku 024326. ISSN 2469-9985. E-ISSN 2469-9993
Grant CEP: GA ČR GA19-14048S
Výzkumná infrastruktura: CESNET II - 90042; CERIT-SC - 90085
Institucionální podpora: RVO:61389005
Klíčová slova: spectroscopic properties * He-4 * matrices
Obor OECD: Nuclear physics
Impakt faktor: 3.1, rok: 2022
Způsob publikování: Omezený přístup
https://doi.org/10.1103/PhysRevC.105.024326

Bulk and spectroscopic properties of He-4 are studied within an equation of motion phonon method. Such a method generates a basis of n-phonon (n = 0, 1, 2, 3...) states composed of tensor products of particle-hole Tamm-Dancoff phonons and then solves the full eigenvalue problem in such a basis. The method does not rely on any approximation and is free of any contamination induced by the center of mass, in virtue of a procedure exploiting the singular value decomposition of rectangular matrices. Two potentials, both derived from the chiral effective field theory, are adopted in a self-consistent calculation performed within a space including up to three phonons. The latter basis states are treated under a simplifying assumption. A comparative analysis with the experimental data points out the different performances of the two potentials. It shows also that the calculation succeeds only partially in the description of the spectroscopic properties and suggests a recipe for further improvements.
Trvalý link: http://hdl.handle.net/11104/0330263