Author: Safronava, A.A.
Paper Title Page
THPS096 Neutron-physical Characteristics of the Subcritical Setup with Natural Uranium Blanket Bombarded by 4 GeV Deuterons 3660
 
  • M. Artiushenko, Y.T. Petrusenko, V.V. Sotnikov, V.A. Voronko
    NSC/KIPT, Kharkov, Ukraine
  • A.A. Patapenka, A.A. Safronava, I.V. Zhuk
    JIPNR-Sosny NASB, Minsk, Belarus
  
  An ex­tend­ed U/Pb-as­sem­bly was ir­ra­di­at­ed with an ex­tract­ed beam of 4 GeV deuterons from the Nu­clotron ac­cel­er­a­tor at the JINR, Dubna, Rus­sia. In­for­ma­tion on the spa­tial dis­tri­bu­tions of neu­trons in the lead tar­get and the ura­ni­um blan­ket was ob­tained with sets of ac­ti­va­tion de­tec­tors (natPb and natU) and solid state nu­cle­ar track de­tec­tors (SSNTD). Spa­tial dis­tri­bu­tion of the natPb, and natU fis­sion re­ac­tion rates in the vol­ume of the tar­get and blan­ket in­stal­la­tion were ob­tained using SSNTD tech­niques. Ac­ti­va­tion method was used to ob­tain the spa­tial dis­tri­bu­tions of 238U(n,g), 238U(n,f) re­ac­tions rates. The pro­ce­dure of com­bin­ing the track count­ing and gam­ma-spec­trom­e­try tech­niques for the de­ter­mi­na­tion of spec­tral in­dices is a new de­vel­op­ment. It in­cludes gath­er­ing in­for­ma­tion from the same sam­ple by SSNTD meth­ods, i.e., count­ing the fis­sion tracks of 238U, and also by gam­ma-spec­trom­e­try of 239Np pro­duc­tion. Sets of spec­tral in­dices val­ues (ratio of 238U(n,g) to 238U(n,f) re­ac­tion rates), rep­re­sent­ing the in­te­gral nu­cle­ar data were de­fined. Com­par­i­son be­tween the ex­per­i­men­tal data and the cal­cu­la­tions per­formed with the use of the com­put­er nu­mer­i­cal code FLUKA2008 was made.