Study of reactions induced by fast neutrons on 10B nucleus with tritium emission using coordinate detector

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Abstract

The interaction of fast neutrons with the 10B nucleus at energies from 3 to 7 MeV is studied with the aim of isolating the reaction with the production of the 8Be* nucleus in an excited state. This reaction stands out from the three-body reaction with the emission of triton and two α-particles. Simulation of ionization losses of secondary 3H and 4He nuclei in solid and gas layers of position-sensitive multiwire detectors with sensitive sizes both a 100 × 100 and 50 × 50 mm2 showed that events are localized in different areas in diagrams plotted from losses in two gas layers. Experimental result with 100 × 100 mm2 detector showed the possibility of isolating a reaction with the emission of 3H and 8Be* nuclei.

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About the authors

S. I. Potashev

Institute for Nuclear Research of the Russian Academy of Sciences; P. N. Lebedev Physical Institute of the Russian Academy of Sciences

Author for correspondence.
Email: potashev@inr.ru
Russian Federation, Moscow; Moscow

I. V. Meshkov

P. N. Lebedev Physical Institute of the Russian Academy of Sciences

Email: potashev@inr.ru
Russian Federation, Moscow

Yu. M. Burmistrov

Institute for Nuclear Research of the Russian Academy of Sciences

Email: potashev@inr.ru
Russian Federation, Moscow

A. I. Drachev

Institute for Nuclear Research of the Russian Academy of Sciences

Email: potashev@inr.ru
Russian Federation, Moscow

S. K. Karaevsky

Institute for Nuclear Research of the Russian Academy of Sciences

Email: potashev@inr.ru
Russian Federation, Moscow

A. A. Kasparov

Institute for Nuclear Research of the Russian Academy of Sciences

Email: potashev@inr.ru
Russian Federation, Moscow

E. A. Permyakov

Institute for Nuclear Research of the Russian Academy of Sciences

Email: potashev@inr.ru
Russian Federation, Moscow

V. N. Ponomarev

Institute for Nuclear Research of the Russian Academy of Sciences

Email: potashev@inr.ru
Russian Federation, Moscow

References

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Supplementary files

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2. Fig. 1. Simulated correlation diagram of ionization losses of triton from the reaction n + 10B → 3H + 4He + 4He in two consecutive gaps of a 100 × 100 mm2 detector.

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3. Fig. 2. Simulated correlation diagram of ionization losses of triton from the reaction n + 10B → 3H + 8Be* in two consecutive gaps of a 100×100 mm2 detector.

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4. Fig. 3. Experimental diagram of the correlation of amplitudes caused by charged particles from the interaction of neutrons with the 10B nucleus in two successive gaps of the 100×100 mm2 detector. The dashed area corresponds to the reaction n + 10B → 3H + 8Be.

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5. Fig. 4. Position-sensitive neutron detector with sensitive dimensions of 50 × 50 mm2: 1 and 2 — 10B layers on silicon substrates; 3 and 4 — Al2O3 ceramics-glass-textolite frames with X1 and Y1 coordinate grid wires; 5 — frame with 20 μm anode A wires; 6 and 7 — frames with X2 and Y2 coordinate grid wires.

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6. Fig. 5. Simulated correlation diagram of ionization losses of triton from the reaction n + 10B → 3H + 4He + 4He of the sum of the first two and the sum of the last two gaps of the 50 × 50 mm2 detector.

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7. Fig. 6. Simulated correlation diagram of ionization losses of triton from the reaction n + 10B → 3H + 8Be* of the sum of the first two and the sum of the last two gaps of the 50 × 50 mm2 detector.

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