64Zn Reaction Research Articles

Analysis of barrier distributions data for16O + 64Zn reaction at sub-barrier energies

The barrier distribution data for the 16O + 64Zn reaction at energies spanning around the no minal barrier are examined by employing symmetric-asymmetric Gaussian barrier distribution (SAGBD) approach. The cumulative role of dominant channel couplings in the SAGBD method are determined in terms of the channel coupling parameter λ and percentage decrease of fusion barrier VCBRED with reference to nominal Coulomb barrier. The non-zero and positive values of these parameters for the studied system quantitively measure the influences of dominant intrinsic channels originated from the structure of the participants. The barrier distribution data of 16O + 64Zn reaction is quantitatively as well as qualitatively explained by SAGBD outcomes.

An Investigation of 10,11Be+ 64Zn Reactions Using Different Potentials

The elastic scattering angular distributions of 10,11Be + 64Zn reactions at Ecm = 24.5 MeV are examined by using the semi-phenomenological density distributions and different nuclear potentials. In nuclear potential calculations, the Sao Paulo, DDM3Y andWoods–Saxon potentials are applied to acquire the elastic scattering angular distributions. The imaginary diffusion parameters beside the surface potential are very important in this nuclear interaction. The theoretical results are compared with the experimental data with and without the dynamic polarization potential (DPP) in order to account for the coupling to the breakup channel.

Soft-core Interaction for the 4,6He + 64Zn Fusion Reactions

In this paper, the cross section of the 4He + 64Zn and 6He + 64Zn reactions, at bombarding energies above and below the fusion barrier, has been investigated. Soft-core nucleon-nucleon interaction and the Monte Carlo method have been employed for studying the nuclear potential of the projectile-target system. One adjustable parameter has been chosen in this study. This parameter can change the depth of the soft-core potential. It has to be adjusted so that the calculated elastic scattering and fusion cross sections are in acceptable agreement with experimental data. Our results indicate that an increase in energy decreases the depth parameter of the soft-core nucleon-nucleon potential obtained from careful analysis the 4He + 64Zn and 6He + 64Zn reactions. Likewise, by comparing the results obtained from both reactions, one can observe that the calculated depth parameter for the reaction related to 6He is larger than that for 4He at the same energy, in particular at the sub-barrier energies. We try to explain this behavior.

Spectroscopic information from the63Cu(p, γ)64Zn reaction in the GDR region

The proton capture cross sections for the reaction63Cu(p, γi)64Zn leading to several resolved states in the64Zn nucleus have been measured forE p =6.5–11.0 MeV. The excitation functions have been reproduced by the combined CN and DSD models. The extracted spectroscopic factors compared with those derived from the stripping reaction are found to show a distinct correlation.

Exact finite-range DWBA description of the60Ni(160,12C)64Zn reaction at 60 MeV incident energy

Cross section angular distributions of60Ni(16O,12C)64Zn reactions leading to three strongly excited states at 60 MeV incident energy and the16O+60Ni and12C+64Zn elastic scattering at 60 MeV respectively 45 MeV and 54 MeV have been measured using aQ3D magnetic spectrograph. EFR-DWBA calculations assuming the transfer of anα-cluster in its 0s ground state are able to describe the general features of the strongly oscillating experimental angular distributions using a surface transparent optical model potential. The optical model parameters used in the DWBA calculations are obtained from fits of the elastic scattering data of incident and exit channels. The importance of “correct” optical model parameters in the exit channels for relative spectroscopic factors will be discussed and the extracted relative spectroscopic factors will be compared to previous (6Li,d) results.

Gamma-ray studies in64Zn: levels above 3.1 MeV

The 61Ni ( alpha ,n gamma ) 64Zn reaction has been studied 8.6 MeV and 9.35 MeV bombarding energies together with the 56Fe(11B, p2n gamma )64Zn reaction at 30 MeV bombarding energy. The gamma -ray decay scheme of 64Zn has been deduced up to 5.7 MeV excitation by means of gamma - gamma coincidence experiments and n- gamma coincidence experiments. Spins and parities have been deduced for most of the high-spin states between 3.1 and 5.7 MeV excitation by means of gamma -ray angular distribution measurements together with gamma -ray linear polarisation measurements. The lifetimes of levels have been measured by DSAM enabling electromagnetic transition rates to be determined for many transitions. The results have been compared with shell-model, cluster-vibration model and interacting boson approximation calculations.

Gamma ray spectroscopy in64Zn-levels below 3.1 MeV in excitation

States in 64Zn were populated using the 61Ni( alpha ,n gamma )64Zn reaction at a beam energy of 7.8 MeV. Excitation energies, gamma ray branching ratios, angular distributions, linear polarisations and centroid shifts were measured for levels in 64Zn below 3.1 MeV in excitation. Electromagnetic multipole mixing ratios were determined for many of the gamma ray transitions. New spin and parity assignments of Jpi =3+ and 2+ have been made for the levels at 2979 keV and 3005 keV, whilst the spins and parities of the 2737, 2794 and 3078 keV levels are confirmed at 4+, 2+ and 4+ respectively. The spin and parity of the 3093 keV level has been restricted to either 3+ or 2+.

Analogue resonances in the 64Zn nucleus

Two g9/2 analogue resonances have been found in 64Zn, corresponding to the 1.55 and 1.59 MeV levels in the parent nucleus 64Cu. The resonances were located through the 63Cu(p, gamma )64Zn reaction at proton bombarding energies Eplab=3217 and 3251 keV respectively. The gamma ray transitions from the isobaric analogue resonances to the lower lying levels in 64Zn were studied with a Ge(Li) detector. The asymmetry ratios I(0 degrees )/I(90 degrees ) were measured for a few prominent gamma ray transitions. Based on these studies both the resonances were suggested to have spin and parity Jpi =3-. From the analogue resonances of M1 branch of about 0.5*10-2 Wu was found to proceed to a level at the excitation energy 3.002 MeV which was identified as the main component of the anti-analogue state.