Investigation of exotic states of 13C at low energy

Abstract

The differential cross-sections of the elastic and inelastic [Formula: see text]C scattering have been measured at E[Formula: see text][Formula: see text]MeV. The radii of the exited states: 3.09 [Formula: see text] and 8.86 [Formula: see text] MeV were determined using the Modified Diffraction Model. The radii of these excited states are larger than that of the ground state of [Formula: see text]C, confirming the suggestion that the 8.86 [Formula: see text] MeV state could be an analog of the Hoyle state in [Formula: see text]C and the 3.09 [Formula: see text] MeV state has a neutron halo. The possibility of coexistence of various exotic states in the structure of the [Formula: see text]C nucleus is shown.

The cluster states in light nuclei

“…This value is ~ 1.20 times larger than that for the ground state. Also, in Table 1 the radius for the excited state of 8.86 MeV of the 13 C nucleus is showed, which is also an analog of the Hoyle state (7.65 MeV) in 12 C [9,11]. The comparison of rms radii of excited states of 11 B, 12 C and 13 C nuclei is given in Table 1.…”

“…The detailed description of targets preparation and measuring the thicknesses of the targets is given in [12]. Typical energy spectrum of 29 MeV α-particles scattered by 11 B is given in Fig. 1.…”

“…This paper is a part of our extensive study of the cluster structure in the 1p-shell nuclei, where we investigate the interaction of deuterons, 3 He and alpha particles with these nuclei at different energies [8][9][10][11]. In the present work we continue the investigation of the nature of 11 B excited state at low energies.…”

STUDY OF ELASTIC AND INELASTIC SCATTERING OF DEUTREONS BY 13C NUCLEI AT ENERGY Ed=18 MeV

“…It is seen that the coupling of channels worsened the description of elastic scattering in the region of angles up to 60 degrees. Probably, to eliminate this problem, it is necessary to include additional processes in the coupling: reactions and inelastic channels with excitation of other levels of the 13 С nucleus [17][18][19][20][21].…”