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

FORMATION OF INCLUSIVE REACTION SPECTRA (p, xd) ON MIDDLE CORES

15 Oct 2020, 18:15

1h

Online

Poster report Section 2. Experimental and theoretical studies of nuclear reactions. Poster session 2 (part 3)

Speaker

Gulzhaina Aliyeva

Description

FORMATION OF INCLUSIVE REACTION SPECTRA (p, xd) ON MIDDLE CORES

G. Aliyeva^1,2, J.K. Kerimkulov², M. Nassurlla², B.M. Sadykov², T.K. Zholdybayev^2,3

¹Gumilev Eurasian National University, Nur-Sultan, Kazakhstan;
²Institute of Nuclear Physics, Kazakhstan;
³Al Farabi Kazakh National University, Kazakhstan;

The development of the concept of the mechanism of pre-equilibrium decay in nuclear reactions, reflecting the dynamics of the formation and evolution of an excited system to an equilibrium state, remains an urgent task of the theory of nuclear reactions [1] To a large extent, its solution is connected with the need to obtain precision experimental data that are currently missing for double differential cross sections in reactions with charged particles.

The experimental measurements of the double-differential reaction cross sections (p, xd) were carried out on a beam of accelerated protons with an energy of 30 MeV of the isochronous cyclotron U-150 M INP using self-sustaining targets. The measurements were performed in the angular range of 30-135⁰ in the laboratory coordinate system with a step of 15⁰.

The systematic errors in the cross sections were mainly caused by errors in the determination of the target thickness (<5%), calibration of the current integrator (~ 1%), and solid angle of the spectrometer (1.3%). The energy of a beam of accelerated particles was measured with an accuracy of 1.2%. The total systematic error did not exceed 10%.

The statistical error varied for deuterons from 5% in the low-energy to 20% in the high-energy energy regions. After integration over the angle of the double-differential cross sections, integral cross sections of these reactions were obtained.

The analysis of the experimental results was carried out in the framework of the Griffin exciton model [2] of pre-equilibrium nuclear decay according to the PRECO-2006 program [3], which describes the emission of particles with mass numbers from 1 to 4. Satisfactory agreement was obtained between the experimental and calculated values in the energy region corresponding to the pre-equilibrium mechanism.

[1] E.Gadioli, P.E.Hodgson // Oxford Univ. Press, New York, 1992. [2] J.J.Griffin // Phys. Rev. Lett. – 1966. – №9. – P.478. [3] C.Kalbach PRECO-2006: Exiton model preequilibrium nuclear reaction code with direct reaction. – Durham NC 27708-0308, 2007.