Grigor'ev Ju.V.1, Kitaev V.Ja.1, Moiseev K.V.1, Panteleev C.C.2, Faikov-Stanchik H.2
1Institute of Physics and Power Engineering, Obninsk, Russia
2Joint Institute of Nuclear Research, Dubna, Russia
The time-of-flight spectra from 1 to 15 multiplicity were measured on the 122 m flight path of the IBR-30 of LNP, JINR by means 16-section liquid scintillation (n,γ)-detector of volume of 80 l for two thin metallic Pu-239 samples-radiators without and with 4 thickness (0.3 mm, 0.5 mm, 1 mm, 2.3 mm) samples-filters on the neutron beam. Spectra of multiplicity, average multiplicity and α-value (α=sg/sf) were obtained from time-of-flight spectra for 27 resonances in energy range 7-170 eV and in energy groups for energy range 4.65-2150 eV with and without samples-filters of Pu-239. The resonance self-shielding effect in α-value and average multiplicity are observed in within limits 5-10% for experimental data.
1. Adamchuk Ju.V., Voskanjan M.A., Muradjan G.V. i dr. Izmerenie velichiny al'fa na rezonansah G i Zg. Materialy 6-j Vsesojuznoj konferencii po nejtronnoj fizike. Kiev, 2-6 oktjabrja 1983, t.2, M.1984, p. 137.
2. Adamchuk Ju.V., Voskanjan M.A., Muradjan G.V., Shhepkin Ju.G. Izmerenie znachenija al'fa na rezonansah plutonija-239. AJe, t.61, issue.3, 1986, p.199.
3. Ju.V. Grigor'ev, V.Ja. Kitaev, K.V. Moiseev, H. Fajkov-Stanchik, Hen Syn Ho. Izmerenie spektrov kratnosti gamma-luchej i velichiny al'fa dlja plutonija-239 v oblasti jenergij 2-2150 jeV. PAST, Series: Nuclear Constants, issue.3-4, 1997, p.11.
4. Yu.V.Grigoriev,V.Ya.Kitaev,V.V.Sinitsa,H.Faikov-Stanczyk, Hyon Sung Ho. Measurements of the gamma-ray multiplicity spectra of U-235 and Pu-239 with 16-section liquid scintillation detector. ISINN-6 on Netron Spectroscopy,Nuclear Structure, Related Topics. Dubna, May 13-16, 1998.
5. W.R.Kanne, H.B.Stewart and F.A.White. Capture-to-Fission Ratio of Pu and U for Intermediate Energy Neutrons. Proc.of Inter. Conf. on Using of Atomic Energy. Geneva. Augest 8-20,1955,v.4,p.370.
6. Sinica V.V. Programma rascheta gruppovyh konstantna osnove biblioteki ocenennyh nejtronnyh dannyh. PAST, Series: Nuclear Constants, 1984, issue.5(59), p.34.
7. Blokhin A.I., Ignatyuk A.V., Kuzminov B.D. et al. In Proc. of Inter.Conf.on Nuclear Data for Science and Technology. Julich FRG, 1991, p.800.
8. Rose P.F., Dunford C.K. ed. ENDF-102. Data Formats and Procedures for the Evaluated Nuclear Data File, ENDF, report BNL, Upton, New York, 11973, USA, 1988.
9. Shibata K. et al. Japanese Evaluated Nuclear Data Library. Version-3. JENDL-3. Rep. JAERI 1319, 1990.
10. Abagjan L.P., Bazazjanc N.S., Nikolaev M.N., Cibulja A.M. Gruppovye konstanty dlja rascheta reaktorov i zashhity. M., 1981.
