LXX International conference "NUCLEUS – 2020. Nuclear physics and elementary particle physics. Nuclear physics technologies"

CROSS-SECTIONS FOR THE 27Al(γ,2pn)24Na MULTIPARTICLE REACTION AT Еγmax = 31.5-100 MeV

17 Oct 2020, 16:50

25m

Online

Oral report Section 2. Experimental and theoretical studies of nuclear reactions. Section 2. Experimental and theoretical studies of nuclear reactions

Speaker

Dr O.S. Deiev

Description

The possibility of using the photonuclear multiparticle reaction 27Al(γ,2pn)24Na (Eth = 31.4 MeV) as a monitor of the flux of γ-quanta with the bremsstrahlung end-point energies Eγmax up to 140 MeV was studied. The aluminum targets were activated by the bremsstrahlung beam at Eγmax = 30-100 MeV using the LUE-40 RDC “Accelerator” NSC KIPT. The γ-radiation spectra of the irradiated 27Al targets were registered using a semiconductor HPGe-detector with the 20% absolute efficiency and with the 1.8 keV energy resolution at the 1332.5keV γ-line of 60Со. The γ-line with Еγ = 1368.6 keV was used to obtain cross-sections <σ(E)> of the 27Al(γ,2pn)24Na reaction.
The experimental <σ(E)> results from [1-3] and the cross sections <σ(E)> estimated using the “photon difference” method showed a significant scatter of data near 0.2 mb. The experimental value of <σ(E)> found in the present work at the maximum of cross section of the reaction under study is near 0.2 mb and is consistent with the data [2,3]. The theoretical <σ(E)> value obtained with the TALYS 1.9 program code is 0.12 mb.

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