B. B. Skorodumov

Alpha-cluster states in 18O

The excitation function of elastic α-particle scattering on 14C has been measured in the laboratory energy range 16.3–19.2 MeV using a backscattering technique with a thick target. These data were analyzed together with the old low-energy data of G.L. Morgan et al. in the framework of the R-matrix formalism. Spin-parity assignments were made for 32 states in 18O in the excitation range 9–20 MeV. The estimates of the widths of the states are also presented. The 0+ and 0−α-cluster bands appeared to be well separated by 5.6 MeV (as in 16O and 20Ne). We have not found a confirmation of existence of the negative-parity molecular states proposed by M. Gai et al. We observed an effect of a doubling of α-cluster levels in 18O similar to that found in 22Ne.

Investigation of the 19Na nucleus via resonance elastic scattering

The structure of the unbound proton-rich isotope 19Na was studied in resonance elastic scattering of a radioactive 18Ne beam on a proton target using the thick-target inverse-kinematics method. The experiment covered the excitation energy range from 0.5 to 2.7 MeV in c.m.s. Only one state of 19Na (the second excited state) was observed. A combined R-matrix and potential model analysis was performed. The spin and parity assignment of this second excited state was confirmed to be 1/2+. We show that the position of the 1/2+ state significantly affects the reaction rate through that state, but the total reaction rate remains unchanged since the 18Ne(2p, γ) proceeds mostly via the ground and first excited states in 19Na at stellar temperatures.

T=3/2 states in {sup 13}C

Background: Experimental information on the structure of low-lying levels with isospin 3/2 in systems with 13 nucleons can be used to evaluate the quality of modern theoretical predictions for the light exotic systems. This level structure is poorly known at present. Purpose: Search for

Lowest excited states of {sup 13}O

T=3/2

Doppler shift as a tool for studies of resonant (p,n) reactions with RIBs: Spectroscopy of 7He

states in

Spectroscopic structure of exotic 19Na. Astrophysics implication

^{13}\mathrm{C}

α‐stripping Reactions with Exotic Nuclei:12C(7Be,3He)16O

was performed in this work. Method: These states were observed in the resonance elastic scattering of radioactive beam

T˜5'2 states in 9 Li: Isobaric analog states of 9 He

^{12}\mathrm{B}

Doubling of alpha cluster states in Ne-22

on protons using the thick target inverse kinematics technique. Results: Six new states in

Investigation of the alpha-cluster structure of Ne-22 and Mg-22

^{13}\mathrm{C}