Elastic scattering of 86 MeV9Li and 55 MeV6He on208Pb

The cross sections of elastically scattered⁹Li and⁶He on²⁰⁸Pb were measured. The scattered particles were detected by an annular CR-39 solid state nuclear track detector and the monitoring was done with a triple telescope of silicon detectors. The classical and optical model analyses of the measured elastic cross sections have been carried out. It was shown that the peripheral⁹Li interaction region has a rather high transparency. Strong dynamical polarization of⁹Li ions in the process of scattering is suggested.     

Search for cluster decay of114Ba

A search for the¹²C decay of¹¹⁴Ba produced in the⁵⁸Ni(⁵⁸Ni,2n) reaction was performed by using polycarbonate track detectors. Assuming the total half-life of¹¹⁴Ba to be 0.1 s, the lower limit T _c ≥10³ s for the partial¹²C-decay half-life was established.     

Studies of anomalous cosmic ray N, O, and Ne using Cn track detectors

We report measurements of the energy spectra of anomalous cosmic ray N, O and Ne in the energy interval 5–25 MeV/nucleon made with stacks of cellulose nitrate sheets exposed on “Cosmos” satellites in Earth's vicinity in 1994. The successive etching was applied for the best charge identification.     

The present state of cluster radioactivity research

Physics of Atomic Nuclei - Complete mass distributions of the energetically allowed decays of nuclei with A &;gt; 112 were calculated including the known regions of cluster radioactivity and...     

Multiplicities in84Kr interactions in emulsion at 800–950 MeV/nucleon

Inelastic interactions induced by⁸⁴Kr nuclei at 800–950 MeV/nucleon have been studied using a high angular resolution emulsion detector. Data on multiplicities of the produced particles, projectile and target fragments are shown. Comparisons with cascade calculations have been performed.We thank to Swedish Research Council for Natural Sciences for the financial support. Scanning and measurements performed by E.G. Broomé and V. Kopljar are acknowledged.     

On the neutron charge radius and the new experiments proposed for the precise (n,e)-scattering length measurement

Strict comprehensive treating the generalized Dirak equation for nucleon in external electro-magnetic field argues quite clear that there is no physical reason to bring into consideration so-called “Foldy-term” while obtaining the neutron mean square charge radius < r _n ² >, caused by an electric charge distribution inside a nucleon, from the experimental value of the (ne) — scattering length b _ne , that term being, as a matter of fact, fictitious one. Consequently, the representing of the experimental quantity b _ne as a sum of “Foldy length” b _F and “intrinsic” one b_I, even so splitting the total value of < r _n ² > in “Foldy” and “intrinsic” < r _in ² >, turn out of having no profound physical sense, being rather ambiguous in actual fact. The formal phenomenological relation, originated from the generalized Dirak equation for nucleon, of the quantities b _ne , < r _n ² >, and neutron anomalous magnetic moment μ is inquired. Concise treating < r _n ² > in the frame-work of up-to-date nucleon cloudy bag model (CBM) is presented, no “Foldy term” being emerged, and < r _n ² >, calculated according this approach, provides b _ne -value which is in agreement with experimental result within accuracy of about 10%. On the other hand, the experimental b _ne -value proves to be described phenomenologically through solely the neutron anomalous magnetic moment μ with the same accuracy ～ 10%. Then the necessity of obtaining b _ne -value with more reliable accuracy then in previous experiments becomes obvious, corrections have to be reduced to the level of the precise declared. For these aims, two new proposed experiments have been Monte-Carlo modelled. The first renders the measurement of the energy dependence of an elastic scattering cross-section on ⁸⁶ Kr, having the unique small capture cross-section. The second one is to measure the energy dependence of neutron scattering angle anisotropy for natural Xe.     

Effect of Coriolis Interaction on the Decay of Isotones with <Emphasis Type="Italic">N</Emphasis> = 149 and <Emphasis Type="Italic">N</Emphasis> = 153

The quasi-neutron structure of nuclei in two chains of odd isotones with N = 149 and N = 153: ^243,247Pu, ^245,249Cm, ^247,251Cf, ^249,253Fm, ^251,255No, and is considered. Single-particle energy spectra are calculated using the two center shell model (TCSM). Minimizing the potential energy with respect to the collective coordinates gives the ground state of the studied nucleos, which is subsequently used to describe low-lying quasi-neutron states. The K-mixing of the basis TCSM wave functions is considered by including the Coriolis correction in the total Hamiltonian of the system. The effect of level blocking is also considered in the calculations. The probabilities of the E2 transitions to the ground states and the corresponding lifetimes of the quasi-neutron levels are estimated.     

Neutron Star Matter and Baryonic Interactions

Physics of Atomic Nuclei - The properties of neutron-star matter up to the appearance of hyperons are calculated with the aid of Skyrme potentials. The conditions for the appearance of Λ...