EFFECTIVE REACTION CROSS-SECTIONS FOR Be-7 PRODUCTION BY INTERACTION OF FAST NEUTRONS IN AN ACCELERATOR-DRIVEN SYSTEM WITH LIGHT NUCLEI

Authors & Affiliations

Buttsev V.S.1, Korbut T.N.2, Korneev S.V.3, Martsynkevich B.A.2, Khilmanovich A.M.2, Chigrinov S.E.3, Chultem D.1
1Joint Institute for Nuclear Research, Dubna, Russia
2B.I. Stepanov Institute of Physics, Belarus National Academy of Sciences, Minsk, Belarus
3Sosny Joint Institute for Energy and Nuclear Research, Belarus National Academy of Sciences, Minsk, Belarus

The measurement of effective reaction cross-sections for 74Be production by irradiation of light nuclei (C, O, F, Na, Cl, K) with fast neutrons from the interaction of 660 MeV protons with a thick lead target is described. The experiment was conducted on the proton accelerator at the Nuclear Problems Laboratory (JINR, Dubna). Measurements of the neutron flux density and the 74Be production rate were performed using the activation method. Cross-sections of 74Be production decrease from 0.01 barns for carbon to 0.00005 barns for potassium. The model of nuclear reactions of ~20-50 MeV neutrons with light nuclei taking into account the effective potential barrier for 74Be was used. In general, the model correctly reproduces the measured values.

Keywords
cross section 7Be, fast neutrons, phasotron, activation technique, potential barrier

Article Text (in English, PDF, Translated by IAEA)

References

UDC 539.17

Problems of Atomic Science and Technology. Series: Nuclear Constants", issue 1, 2004