LXXV International Conference «NUCLEUS – 2025. Nuclear physics, elementary particle physics and nuclear technologies»

On optimization of (γ, n 0; 1; 2)- experiments with the proposed neutron spectrometer at national center for physics and mathematics

6 Jul 2025, 13:00

20m

3058 (Санкт-Петербургский Государственный Университет )

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

Speaker

Leonid Dzhilavyan (Institute for Nuclear Research of RAS)

Description

For γ-quantum energies in the region of E1 giant resonance in atomic nuclei, there were analyzed:
• requirements for (γ, n 0;1;2)-experiments with fast neutron spectrometry on the base of results of the works [1, 2];
• parameters of γ-sources from Compton backscattering High Intensity γ-ray Source (HIγS, Durham, USA [3]) and National Center for Physics and Mathematics (NCPhM, Sarov, Russia [4–6]);
• characteristics of the neutron spectrometer proposed for NCPhM [5, 6];
• principles of one-dimensional time-coordinate compensation for neutron spectrometer scintillators [7, 8].
Initial experiments have been carried out using the one-dimensional time-coordinate compensation method [7, 8] to investigate the possibilities of improving the efficiency and resolution of the fast neutron scintillation spectrometer proposed in [5, 6], which provides both amplitude and time-of-flight data.

1. N.K.Sherman et al. Phys.Rev.Lett. 1975, V.35. P.1215.
2. S.S.Verbitsky et al. Phys.At.Nuclei, 2009, V.72. P.387.
3. H.R.Weller et al. Prog.Part.Nucl.Phys. 2009, V.62. P.257.
4. L.V.Grigorenko et al. FIZMAT, 2023, V.3–4. P.1 (in russian).
5. A.M.Lapik et al. Bull.Russ.Acad Sci.Phys. 2024, V.88. P.1191.
6. A.M.Lapik et al. Mosc.Univ.Bull.Phys.2025, V.80, №3.
7. K.G.Sharpak et al. Nucl.Instr.& Meth.1962,V.15,P.323.    
8. V.A.Grigoriev et al.Elektr.met.yad.-fiz.eksp. M.Energoatomizdat.1988(in rus.)