Author
K. Rusek
Bio: K. Rusek is an academic researcher. The author has an hindex of 1, co-authored 1 publications receiving 15 citations.
Papers
More filters
TL;DR: In this paper, the local dynamic polarization potential (DPP) component of the He + p interaction was determined by subjecting the elastic scattering S matrix from continuum-discretized coupled-channels calculations to S matri$\stackrel{\ensuremath{rightarrow}}{\mathrm{x}}$potential inversion.
Abstract: We study the local dynamic polarization potential (DPP) component of the ${}^{6}\mathrm{He}+p$ interaction, determining that part which is due to breakup processes. Results are presented for c.m. energies of 21.57 and 35.06 MeV. The DPP is found by subjecting the elastic scattering S matrix from continuum-discretized coupled-channels calculations to S matri$\stackrel{\ensuremath{\rightarrow}}{\mathrm{x}}$potential inversion. The iterative-perturbative inversion method is employed, and the method is shown to give reliable potentials down to projectile-target separation close to zero, a necessary requirement for this case. The contributions of different continuum states are compared, and the way they interact to give the overall DPP is studied. The DPP is found to be very different from that determined using the weighted trivially equivalent approximate method.
15 citations
Cited by
More filters
TL;DR: In this article, a semiclassical polarization potential was used to study the effect of the Coulomb dipole polarizability on the elastic scattering of 6 He on 208 Pb at laboratory energies of 14, 16, 18 and 22 MeV.
99 citations
TL;DR: In this paper, the structure of the three-body Borromean nucleus was approximated by a two-body di-neutron cluster model and the binding energy of the 2n-alpha system was determined to obtain a correct description of the twon-α coordinate, as given by a realistic threebody model calculation.
Abstract: The structure of the three-body Borromean nucleus {sup 6}He is approximated by a two-body di-neutron cluster model. The binding energy of the 2n-{alpha} system is determined to obtain a correct description of the 2n-{alpha} coordinate, as given by a realistic three-body model calculation. The model is applied to describe the breakup effects in elastic scattering of {sup 6}He on several targets, for which experimental data exist. We show that an adequate description of the di-neutron-core degree of freedom permits a fairly accurate description of the elastic scattering of {sup 6}He on different targets.
57 citations
TL;DR: In this paper, an extended Glauber model, incorporating second order noneikonal corrections, realistic single particle densities, and spectroscopic factors from shell model calculations, was used to describe one-proton removal reactions.
Abstract: Excitation functions for total reaction cross sections, ${\ensuremath{\sigma}}_{R}$, were measured for the light, mainly proton-rich nuclei $^{6}\mathrm{Li}$, $^{7}\mathrm{Be}$, $^{10}\mathrm{B}$, $^{9,10,11}\mathrm{C}$, $^{12}\mathrm{N}$, $^{13,15}\mathrm{O}$, and $^{17}\mathrm{Ne}$ incident on a Si telescope at energies between 15 and 53 MeV/nucleon. The telescope served as target, energy degrader and detector. Proton-removal cross sections, ${\ensuremath{\sigma}}_{2p}$ for $^{17}\mathrm{Ne}$ and ${\ensuremath{\sigma}}_{p}$ for most of the other projectiles, were also measured. The strong absorption model reproduces the $A$-dependence of ${\ensuremath{\sigma}}_{R}$, but not the detailed structure. Glauber multiple scattering theory and the Jeukenne, Lejeune, and Mahaux (JLM) folding model provided improved descriptions of the measured ${\ensuremath{\sigma}}_{R}$ values. Rms radii, extracted from the measured ${\ensuremath{\sigma}}_{R}$ using the optical limit of Glauber theory, are in good agreement with those obtained from high energy data. One-proton removal reactions are described using an extended Glauber model, incorporating second order noneikonal corrections, realistic single particle densities, and spectroscopic factors from shell model calculations.
33 citations
TL;DR: In this paper, the effect of the triton transfer on the ground state was investigated by means of the transfer reaction at 25 MeV/nucleon at GANIL with the SPEG spectrometer coupled to the MUST array.
Abstract: The $\ensuremath{\alpha}+2n$ and $t+t$ clustering of the $^{6}\mathrm{He}$ ground state were investigated by means of the transfer reaction $^{6}\mathrm{He}(p,t)^{4}\mathrm{He}$ at 25 MeV/nucleon. The experiment was performed in inverse kinematics at GANIL with the SPEG spectrometer coupled to the MUST array. Experimental data for the transfer reaction were analyzed by a distorted wave Born approximation (DWBA) calculation, including the two neutrons and the triton transfer. The couplings to the $^{6}\mathrm{He}\ensuremath{\rightarrow}^{4}\mathrm{He}+2n$ breakup channels were taken into account with a polarization potential deduced from a coupled-discretized-continuum channels analysis of the $^{6}\mathrm{He}+^{1}\mathrm{H}$ elastic scattering measured at the same time. The influence on the calculations of the $\ensuremath{\alpha}+t$ exit potential and of the triton sequential transfer is discussed. The final calculation gives a spectroscopic factor close to one for the $\ensuremath{\alpha}+2n$ configuration as expected. The spectroscopic factor obtained for the $t+t$ configuration is much smaller than the theoretical predictions.
30 citations
TL;DR: In this article, the elastic cross sections were measured at GANIL in inverse kinematics using radioactive 10;11 Be beams produced at energies of 39:1 A and 38:4 A MeV.
26 citations