The OptModel resonance optical-model code is used to fit available experimental data on the elastic scattering of deuteron on 16O nuclei: differential cross section data at deuteron energies Ed of 0.98 to 200 MeV and 16O + d total reaction cross sections of 38 to 97 MeV. Violation of scattering matrix unitarity (optical-model + resonance) at several energies did not exceed 14
Total cross sections of 19F(d, xt)18F (β+, T1/2 =109.7 min) reaction are evaluated in the range of deuteron energies Ed = 5–16 МeV in our electronic SaBa (Sarov Base) library using mathematic tools (spline approximation) of this library. The reasons for the research were the following. The reaction 19F(d, xt)18F where tritium and 18F nuclei are produced in the same amount has been used for calibration of the tritium detection efficiency in the measurements of cross sections of tritium-producing reactions by the method of tritium accumulation into metal collectors. There was a significant contradiction in experimental data. Our new data for 19F(d, xt)18F reaction at Ed = 6.65 and 6.69 MeV and 19F(d, t0) reaction cross section at Ed = 6.99 and 7.99 MeV appeared. We presented the refinement of the published cross sections of tritium production in reactions on lithium isotopes due to acquisition of evaluated 19F(d, xt)18F reaction cross sections.
Total cross sections σd,xt of reaction 9Be(d, xt) are measured in the 1.5–12 МeV range of deuteron energies with an error of 8.3
Optical-model analysis of experimental data of proton elastic scattering on 7Li nucleus at energy range from 0.05 to 200 MeV was performed. All existing experimental data on elastic scattering differential cross sections, polarization, 7Li + p reaction total cross section were analyzed. Our optical model code OptModel with energy depending optical potential parameters and considering resonant part of the elastic scattering was used. Violation of scattering matrix unitarity (optical model + resonance) at several energy values is less than 18%.
New evaluation of 6Li(d, α)4He reaction integral cross sections obtained in our electronic SaBa (Sarov Base) library by mathematic tools (spline-approximation) of this library is presented. The motivation of the research is the results of our measurements of this reaction differential cross sections at energy range 3.75–8 MeV.
A new evaluation is presented of the integral cross sections of reaction 6 Li( d ,α) 4 He, obtained using the SaBa (Sarov Base) electronic library and its mathematical tools (a spline approximation). Results from measuring the differential cross sections of this reaction in the 3.75–8 MeV interval of energies drive current studies.
New evaluation of 6Li(d, α)4He reaction integral cross sections obtained in our electronic SaBa (Sarov Base) library by mathematic tools (spline-approximation) of this library is presented. The motivation of the research is the results of our measurements of this reaction differential cross sections at energy range 3.75–8 MeV.
Optical-model analysis of experimental data of proton elastic scattering on 7Li nucleus at energy range from 0.05 to 200 MeV was performed. All existing experimental data on elastic scattering differential cross sections, polarization, 7Li + p reaction total cross section were analyzed. Our optical model code OptModel with energy depending optical potential parameters and considering resonant part of the elastic scattering was used. Violation of scattering matrix unitarity (optical model + resonance) at several energy values is less than 18%.
An optical-model analysis is performed for experimental data on the elastic scattering of protons on a 9 Be nucleus in the 0.05–317 MeV range of energies. All available experimental data on the differential cross-sections of elastic scattering are analyzed along with data on the polarization and total cross-sections of the 9 Be + p reaction. The OptModel program code with energy-dependent parameters of the optical potential is used with allowance for the resonance component of elastic scattering. Violation of the scattering matrix unitarity (the sum of the optical-model and resonance components) is observed at separate energy points and is no higher than 15%.
An optical-model analysis is continued for experimental data on the elastic scattering of protons on a 6 Li nucleus in the 0.05–185 MeV range of energies. The energy-dependent parameters of the optical potentials and the total cross section of the 6 Li + p reaction are refined. The OptModel program code with energy-dependent parameters of the optical potential is used with allowance for the resonance component of elastic scattering. Violation of the scattering matrix unitarity (the sum of the optical-model and resonance components) is observed at separate energy points and is no higher than 15%.
An optical-model analysis is performed for experimental data on the elastic scattering of protons on a 7 Li nucleus in the 0.05–200 MeV range of energies. All available experimental data on the differential cross sections of elastic scattering are analyzed along with data on the polarization and total cross sections of the 7 Li + p reaction. The OptModel program code with energy-dependent parameters of the optical potential is used with allowance for the resonance component of elastic scattering. Violation of the scattering matrix unitarity (the sum of the optical-model and resonance components) is observed at separate energy points and is no higher than 18%.
Results are presented from a new evaluation of integral cross sections for 6Li(d,p0,1,2,4) reactions, respective 6Li(d,n0,1,2,4) mirror reactions, and 6Li(d,x)7Be reaction. The evaluation is obtained using mathematical tools (a spline approximation) of the SaBa (SarovBase) electronic library. The study is motivated by results from earlier measurements of the cross sections for 6Li(d,p0,1,2,4) reactions at deuteron energies of 4 to 10 MeV.
Results are presented from a new evaluation of integral cross sections for 6 Li( d , p 0,1,2,4 ) reactions, respective 6 Li( d , n 0,1,2,4 ) mirror reactions, and 6 Li( d , x ) 7 Be reaction. The evaluation is obtained using mathematical tools (a spline approximation) of the SaBa (SarovBase) electronic library. The study is motivated by results from earlier measurements of the cross sections for 6 Li( d , p 0,1,2,4 ) reactions at deuteron energies of 4 to 10 MeV.
An optical model analysis of the elastic scattering of protons on 6Li nuclei for proton energies Ep of 50 keV to 185 MeV is performed using the new OptModel program developed by L.N. Generalov and V.A. Zherebtsov for n, p, d, t, 3,4,6He, 6Li projectiles with allowance for the resonance part of elastic scattering. All accessible data on differential and total cross sections and polarization are analyzed simultaneously. Violation of scattering matrix unitarity (optical model + resonance) at several energy values is less than 10%, which corresponds to the mean errors of the data analyzed. The running of the code at the astrophysical interaction energy range is of great interest for actual nuclear vertex constants research.
Total 6Li(d, xt) reaction cross sections are measured on the basis of the 16O(t, n)18F (β+, T1/2 = 109 min) activation reaction at deuteron energies of 2.5–12 MeV. Measurements are carried out at the EGP‑10 electrostatic tandem accelerator at the Russian Federal Nuclear Center All-Russian Research Institute of Experimental Physics. The error of obtained data is 12%. The cross sections are determined from the yield of 18F nuclei measured in geometry close to that of 4π. 18F nuclei are produced by tritons of the considered reaction in three SiO2 quartz tubes positioned along the direction of the deuteron beam. The technique proposed by B.Ya. Guzhovsky is validated.
The differential cross sections of the reactions 6Li(d, d0, 1), 6Li(d, xt), 7Li(d, d0, 1, 2), and 7Li(d, t0, 1) are measured for deuteron energies Ed = 3–10 MeV. The resulting data are used to determine the integral cross sections.
При энергиях дейтронов Ed = 3–10 МэВ измерены дифференциальные сечения реакций 6Li(d, d0, 1), 6Li(d, xt), 7Li(d, d0, 1, 2), 7Li(d, t0, 1). По ним определены интегральные сечения.
An R-matrix analysis is performed for experimental data on 9Be(p,p0)9Be, 9Be(p,p1)9Be* (1.670 MeV), 9Be(p,p2)9Be* (2.430 MeV), 9Be(p,n0)9B, 9Be(p,d0)8Be, 9Be(p,α0)6Li, 9Be(p,α2)6Li* (3.5618 MeV), and 7Li(3He,p0)9Be reactions at 6.5–19.5 MeV excitation energies of 10B compound nucleus. Experimental data on differential and integral cross sections of the 9Be(p,α2)6Li* (3.5618 MeV, Jπ = 0+) reaction at proton energy Ep = 2.3–4.5 MeV are included in the analysis, along with data on differential cross sections of the 9Be(p,n0)9B reaction at angle 0° in the Ep = 2.2–3.5 MeV energy range. New 10B levels are determined and characteristics of states detected earlier are improved.