Energy levels of A = 21−44 nuclei (V)

https://www.cns.s.u-tokyo.ac.jp/~shimoura/research/nuc_data/pdf/11.pdf

Energy levels of light nuclei A = 11-12

A set of about 4000 data points has been used in a global search for a general optical model parameter prescription. This potential for deuteron-nucleus scattering was confined to remain within the range given by folding model calculations. The data set spans the energy range from 11.8 to 90 MeV and includes many targets ranging in mass from $^{27}\mathrm{Al}$ to $^{238}\mathrm{Th}$. The set includes 50 reaction cross sections, 13 angular distributions for vector polarization at and above 15 MeV, and 103 angular distributions for elastic scattering. A successful 11-parameter potential of the conventional form fits all data analyzed to about 18% rms. Two of these parameters, ${V}_{R}$ and ${a}_{I}$, are functions of proton number and target mass, while five (${V}_{R}$, ${a}_{o}$, ${W}_{S}$, ${W}_{D}$, ${V}_{\mathrm{LS}}$) are smooth functions of bombarding energy. The remainder (${r}_{o}$, ${r}_{I}$, ${r}_{c}$, ${r}_{\mathrm{LS}}$, ${a}_{\mathrm{LS}}$) are constants. A simple functional dependence for ${a}_{I}(A,Z)$ approximately reproduces the rapid changes in $\ensuremath{\sigma}(\ensuremath{\theta})$ found experimentally for nuclei at or near neutron shell closure. A comparison with earlier work suggests that the optical model analyses furnish the rms radii for the real and imaginary potentials with little ambiguity. General agreement but with a somewhat larger scatter (10%) is also found for the real and the imaginary volume integrals deduced. However, little consistency is seen for the imaginary volume integral if the bombarding energy is below 15 MeV. The rms radii and volume integrals have a small but distinct energy dependence. It was found that the 11-parameter potential occasionally has difficulty delivering good simultaneous fits for cross sections and vector polarizations. This situation was improved by the addition of a small, three-parameter imaginary spin-orbit term, which in our global prescription required short range and very small diffuseness.

Global optical model potential for elastic deuteron scattering from 12 to 90 MeV

Based on the existing experimental data of elastic scattering angular distributions and nonelastic cross sections (i.e., total reaction cross sections) for incident deuteron, by using the modified code APMN, we obtain a new optimal set of global deuteron optical potential parameters, which can fit (or reproduce) the experimental data very well for almost all target nuclei ranging from $^{12}\mathrm{C}$ to $^{238}\mathrm{U}$ in the energy region below 183 MeV.

Global deuteron optical model potential for the energy range up to 183 MeV

Nuclear Data Sheets for A = 208

Diffusion élastique des deutons polarisés par 12C de 20 À 30 MeV

Elastic scattering of polarized protons by3H between 19 and 57 MeV

Polarisation et section efficace de la diffusion élastique p+3H À 19 et 30 MeV

Vector $i{T}_{11}$ and tensor $Q=(\frac{1}{2\sqrt{2}})({T}_{20}+\sqrt{6}{T}_{22})$ and $R=(\frac{1}{2\sqrt{2}})({T}_{20}\ensuremath{-}\sqrt{6}{T}_{22})$ analyzing powers have been measured in the elastic scattering of 20.4-, 25.2-, and 29.9-MeV polarized deuterons by protons. Comparison is made with Faddeev-equation calculations including spin-dependent nucleon-nucleon interactions. Qualitative agreement is obtained for all the measured quantities only when both the spin-dependent nucleon-nucleon $P$-wave forces and the tensor ($^{3}S_{1}\ensuremath{-}^{3}D_{1}$) force are taken into account.

Vector and Tensor Analyzing Power Measurements in the Scattering of Polarized Deuterons by Protons and Comparison with Exact Three-Body Calculations

Absolute calibration of a 12C polarimeter for deuterons between 20 and 30 MeV

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