[en] The ³⁶Cl(n, p)³⁶S reaction cross section was measured by the time-of flight method in the pulsed reactor. The measured cross section shows three, not observed previously, neutron resonances wth energies Esub(n)=1.3; 3.5 and 8.2 keV for which there were determined the level width parameters Asub(p)=(γGITAsub(n)GITAsub(p)/GITA): 0.07+-0.01; 0.08+-0.03 and 1.7+-0.3 eV, respectively. The comparison of these results with the excited states obtained by the ³⁶S(p, γ)³⁷Cl reaction made possible a more exact determination of the scale-energy of the ³⁷Cl nucleus excited states

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[en] The α-width of 3.42 eV resonance of samarium 147 has been determined by the new (as compared to the previously used) method: over the ratio of the α-particle yield from the reaction ¹⁴⁷(Sm(n,α) to the triton yield from the reaction ⁶Li(n,t) at the same energy GAMMAsub(α)=1.8+-0.2μeV has been obtained

[en] First experiments on determination of the averaged over resonances cross section of the ¹⁴³Nd(n, α)¹⁴⁰Ce reaction with the help of neutrons with energy of about 30 keV extracted from the electrostatic generator are described. The obtained cross section (20+-3)10^-30 cm² is used to estimate an average alpha-width which is compared with the average alpha width in neutron resonance range. Their values coincide within the accuracy of determination. This is in agreement with a conclusion made in statistical theory on the constancy of alpha width

[en] The measurements were performed on the neutron beam of the IBR-30 reactor. In distinction from the recent published works, thermal neutrons were separated by the flight time. The ³⁵Cl(n,p) reaction cross section was determined by a comparison with the (n,p) and (n,α) reaction cross sections on ¹⁴N and ⁶Li. The ionization chamber was used to register the charged particles. Previously, investigations of the reaction on ³⁵Cl were carried out mainly with the help of the activation method. Only in one experiment, reported over 50 years ago, an ionization chamber was used. Our measurements were performed with 8 targets of NaCl, KCl, LiF and C₅H₅N₅ with different thicknesses. The ³⁵Cl(n,p)³⁵S reaction cross section for thermal neutrons turned out to be equal to (575±13) mb, that is noticeably higher than most of the recent published values. (author). 19 refs., 5 figs., 4 tabs

[en] The averaged cross section of the ₉₅Mo(n, a)₉₂Zr reaction in the 30 keV neutron energy region is measured. The ₇Li(p, n) reaction served as neutron source. The measured cross section is in agreeemnt within errors with the averaged cross section for 30 keV neutrons, calculated in the framework of the statistical theory using parameters of the resonances obtained at neutron energies up to 1.2 keV

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[en] First experiments on determination of the averaged over resonances cross section of the ¹⁴⁷Sm(n,α)¹⁴⁴Nd reaction with the help of neutrons at energy about 30 keV extracted from an electrostatic generator in the ⁷Li(p,n) reaction were described. The obtained cross section (52+-8)x10^-30 cm² is used to estimate the averaged over spins ratio of the average α-width to the mean spacing between levels of compound nucleus. The comparison of the ratio obtained in the experiments with neutrons at 30 keV with the data obtained in the region of separated resonances (at neutron energies from 0 to 100 eV and from 100 to 200 eV) indicates a possible dependence of the α-width on neutron energy

No abstract available