Does the Excited Cluster 14N Exist in the 15O Nucleus?

• Published in: Russian physics journal 2019-03, Vol.61 (11), p.2105-2112
• Main Authors: Dubovichenko, S. B., Burkova, N. A.
• Format: Article
• Language: English
• Subjects: Angular momentum; Clusters; Condensed Matter Physics; Hadrons; Heavy Ions; Lasers; Mathematical and Computational Physics; Nuclear Physics; Nuclei (nuclear physics); Optical Devices; Optics; Photonics; Physics; Physics and Astronomy; Theoretical
• ISSN: 1064-8887; 1573-9228
• DOI: 10.1007/s11182-019-01643-w

On the basis of the modified potential two-cluster model with forbidden state which effectively take the Pauli principle into account, calculations have been performed of the astrophysical S-factor of radiative p 14 N capture to the ground state of the 15 O nucleus at proton energies up to 5 MeV in the center-of-mass system (c.m.s.) with allowance for wide resonances up to 3.4 MeV in the c.m.s. For an acceptable explanation of the available experimental data it is necessary to allow the existence of the 14 N cluster in the excited state 14 N * at an excitation energy of 5.69 MeV and angular momentum J π = 1 – . It is assumed that in such a case it is possible to use the wave function of the 4 D 1/2 state with respect to the relative motion of the p 14 N * clusters. It is also shown that a description of the S-factor of p 14 N capture in the resonance region is possible only under the assumption that all of the low-lying resonances at 260(1/2 + ), 987(3/2 + ), 1447(1/2 + ), 2187(3/2 + ), and 3211(3/2 + ) keV in the c.m.s. are 4 D 1/2 and 4 D 3/2 scattering waves.