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

0555815 - ÚJF 2023 RIV US eng J - Journal Article
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
R&D Projects: GA ČR GA19-14048S
Research Infrastructure: CESNET II - 90042; CERIT-SC - 90085
Institutional support: RVO:61389005
Keywords : spectroscopic properties * He-4 * matrices
OECD category: Nuclear physics
Impact factor: 3.1, year: 2022
Method of publishing: Limited access
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.
Permanent Link: http://hdl.handle.net/11104/0330263