Study of the excitation of 11/2– isomeric state of the nucleus 139Се in reaction (γ, n)m in the giant E1-resonance region

The isomeric yield ratio Ym/Yg is measured in 140Се(γ, n)139m,gСе reaction in 11 - 18 MeV energy range with the step of 0.5 MeV. Using inverse matrix method the experimental cross section of 140Се(γ, n)139m,gСе reaction is estimated. Obtained excitation cross section of the isomeric state of the nucleus 139Се is comparable with the results of the theoretical calculations performed with the TALYS-1.6 program suite

Вивчення фотозбудження ізомерного стану 11/2- ізотопу 129Te в реакції (γ,n)

Dependence of isomeric ratios on the energy of gammas in the reaction 130Te(γ,n)129m,gTe gTe in the dipole resonance energie range have been investigated. Obtained experimental results have been compared with TALYS-1.0 calculations. В области энергий гигантского дипольного резонанса исследовано зависимость изомерных отношений выходов от энергии гамма-квантов в реакции 130Te(γ,n)129m,gTe. Полученные экспериментальные результаты сравниваются с расчетами, проведёнными с помощью программного пакета TALYS-1.0.В області енергій гігантського дипольного резонансу досліджено залежність ізомерних відношень виходів від енергії гамма-квантів в реакції 130Te(γ,n)129m,gTe. Одержані експериментальні результати порівнюються з розрахунками проведеними за допомогою програмного пакета TALYS-1.0.

Investigation of isomeric ratios in (γ, n) reactions on rubidium isotopes in giant dipole resonance energy region

Dependence on gamma-quanta energy of isomeric yield ratios obtained in 85Rb(γ, n)84m,gRb and 87Rb(γ, n)86m,gRb reactions within 10 - 18 MeV energy range have been studied. Thresholds of isomeric states excitations and energies of activation levels have been determined. Experimental results are compared with TALYS-1.0 calculations in the framework of statistical model

A study of isomeric yield ratios in the 124Te(γ,n)123mTe reaction in the giant E1-resonance region

Section II. Experimental Investigations of Nuclear Reactions Mechanism

Investigation of the isomeric states excitation processes for 111Cd and 115Cd isotopes in (γ, n) reaction at the γ-quantum energies in giant dipole resonance region

Cross-sections of the isomeric states excitations in the 112Cd(γ, n)111mCd and 116Cd(γ, n)115m,gCd reactions have been investigated for the 8 - 10 MeV energy region. Experimental isomeric ratios have been obtained. Ex-perimental results are compared with TALYS-1.0 calculations

Analysis of photoneutron cross section accuracy obtained at quasimonochromatic gamma-beams

Using gamma-spectroscopic methods, comparative measurements of (γ, n) reaction yields on the isotopes 140Се and 142Се were carried out in the energy region of 9 - 18 MeV using gamma-quanta. It was shown, that for the isotopes of Cerium using the quasimonochromatic beams of photons [1] the error of the measurement of the (γ, n) reaction cross section due to the contribution of the (γ, 2n) reaction did not exceed 2%