Determination of integral cross sections of 3H in Al foils monitors irradiated by protons with energies ranging from 40 to 2600 MeV

Results of t production in Al foil monitors are presented. These foils have been irradiated by protons of different energies in a range of 0.04 - 2.6 GeV. The irradiations were carried out at the ITEP accelerator U-10 under the ISTC Project 3266 during 2006 - 2009. t has been extracted from Al foils using an A307 Sample Oxidizer. The values of the Al(p,x)t cross sections obtained in these experiments are compared with data measured at other laboratories and with results of simulations by the MCNP6 radiation transport code using the CEM03.03 event generator.Comment: 4 pages, 2 figures, proc. 12th Int. Conf. on Nucleus-Nucleus Collisions (NN2015), June 21-26, 2015, Catania, Ital

Experimental and Computer Simulation Study of Radionuclide Production in Heavy Materials Irradiated by Intermediate Energy Protons

The results of measurements and computer simulations are presented for the yields of residual product nuclei in thin targets: U-nat irradiated by 0.1, 0.8, 1.2, and 1.6 GeV and Tc-99 irradiated by 0.2, 0.8, 1.0, 1.4, and 1.6 GeV protons. The yields were measured at ITEP by direct high-precision gamma spectrometry. About 820 cross sections are presented and used in comparison between measured yields and simulations by the LAHET, INUCL, CEM95, HETC, CASCADE, YIELDX, and ALICE codes.Comment: 10 pages, 4 tables, LaTeX, submitted to the 3rd Topical Meeting on Nuclear Applications of Accelerators Technology (AccApp'99), ANS 1999 Winter Meeting, Long Beach, CA, November 14-18, 199

Experimental and Computer Simulation Study of Radioactivity of Materials Irradiated by Intermediate Energy Protons

The results of measurements and computer simulations of radioactivities and dose rates as functions of decay time are presented for Pb-nat and Bi-209 irradiated by 1.5-GeV protons, Co-59, Cu-63, and Cu-65 irradiated by 0.13- and 1.2-GeV protons, and Th-232 and U-nat irradiated by 0.1- and 0.8-GeV protons. The activities and dose rates are measured by direct high-precision gamma spectrometry. The irradiations were made using external beams extracted from the ITEP U-10 proton synchrotron. Simulations made using the LCS and CINDER'90 code systems are compared with measurements.Comment: 9 pages, 6 figures, 1 table, LaTeX, submitted to the 3rd Topical Meeting on Nuclear Applications of Accelerators Technology (AccApp'99), ANS 1999 Winter Meeting, Long Beach, CA, November 14-18, 199

Experimental and Computer Simulation Study of the Radionuclides Produced in Thin Bi-209 Targets by 130 MeV and 1.5 GeV Protons

The results of experimental and computer simulation studies of the yields of residual product nuclei in Bi-209 thin targets irradiated by 130 MeV and 1.5 GeV protons are presented. The yields were measured by direct high-precision gamma-spectrometry. The gamma-spectrometer resolution was 1.8 keV in the 1332 keV line. The gamma-spectra were processed by the ASPRO code. The gamma-lines were identified, and the cross sections defined, by the SIGMA code using the GDISP radioactive database. The process was monitored by the Al-27(p,x)Na-24 reaction. Results are presented for comparisons between the 209-Bi(p,x) reaction yields obtained experimentally and simulated by the HETC, GNASH, LAHET, INUCL, CEM95, CASCADE, and ALICE codes.Comment: 31 pages, LaTeX, 6 tables, 12 figures available upon request from [email protected] or [email protected] (not available in electronic form), to be published in NIM

Study of Residual Product Nuclide Yields from 0.1, 0.2, 0.8, and 2.6 GeV Proton-Irradiated nat-Hg Targets

The direct gamma-spectrometry method is used to measure more than 350 residual product nuclide yields from 0.1, 0.2, 0.8, and 2.6 GeV proton irradiated HgO targets. The gamma-spectrometer resolution is of 1.8 keV at the 1332 keV gamma-line. The resultant gamma-spectra are processed by the GENIE-2000 code. The gamma-lines are identified, and the cross-sections calculated, by the ITEP-designed SIGMA code using the PCNUDAT radioactive database. The 27-Al(p,x)Na-22 reaction is used as monitor. The experimental results are compared with calculations by the LAHET, CEM95, CEM2k, INUCL, CASCADE, and YIELDX codes.Comment: 11 pages, 9 figures, 2 tables, LaTeX, submitted to Proc. Int. Meeting SATIF-5, July 18-21, 2000, Paris, Franc

Fission Parameters Measurements for Np, Pu, Am, and Cm Isotopes Inside a Salt Blanket Micromodel

The MAKET zero-power heavy water reactor has been used at ITEP to measure the fission characteristics of the Np, Pu, Am, and Cm isotopes in the 0.52NaF+0.48ZrF_4 melt-filled salt blanket micromodel. The 237Np(n,f), 238Pu(n,f), 239Pu(n,f), 240Pu(n,f), 241Pu(n,f), 242m^Am(n,f), 243Cm(n,f), 245Cm(n,f), 247Cm(n,f), 238U(n,f), 238U(n,g), 235U(n,f) fission reaction rates have been measured. The neutron spectrum in the isotope irradiation locations was monitored by measuring the rates of the (235U(n,f), 238U(n,g), 55Mn(n,g), 63Cu(n,g), 176Lu(n,g), 197Au(n,g), 115In(n,n'), 27Al(n,4He), and 64Zn(n,p)) reactions whose cross sections have been commonly accepted. The measured functionals are compared with the respective results of MCNP code simulation obtained using the ENDF/B6 and JENDL3.2 neutron databases.Comment: Proc. AccApp'01 & ADTTA'01 "Nuclear Applications in the New Millemmium" Topical Meeting, Reno, Nevada, USA, November 11-15, 2001, 14 pages, 7 figures, 4 table

Cross Sections for Nuclide Production in 1 GeV Proton-Irradiated 208Pb and 0.8 GeV Proton-Irradiated 197Au

Measured at ITEP (Moscow) cross sections for nuclide production in 1.0 GeV proton-irradiated 208Pb and 0.8 GeV proton-irradiated 197Au targets are presented. The cross sections were measured by direct gamma-spectrometry with a high-resolution Ge detector. The measured cross sections are compared with experimental data of GSI (inverse kinematics, 1 GeV/nucleon 208Pb and 0.8 GeV/nucleon 197Au interacting with a liquid hydrogen target, and the ZSR data (direct kinematics, 1.0 and 0.8 GeV protons on nat-Pb and 197Au, respectively). All experimental data are compared with each other and with results by the Los Alamos codes CEM2k+GEM2, LAQGSM+GEM2, and LAHET (INLC option: Cugnon's INC + Schmidt's evaporation and fission models).Comment: Proc. AccApp'03 Meeting, San Diego, California, June 1-5, 2003, 8 pages, 8 figures, 1 table, only doc fil

Study of Residual Product Nuclide Yields in 1.0 GeV Proton-Irradiated 208-Pb and 2.6 GeV Proton-Irradiated nat-W Thin Targets

113 residual product nuclide yields in a 1.0 GeV proton-irradiated thin monoisotopic 208-Pb sample and 107 residual product nuclide yields in a 2.6 GeV proton-irradiated nat-W sample have been measured and simulated by 8 different codes. The irradiations were made using proton beams extracted from the ITEP synchrotron. The nuclide yields were gamma-spectrometered directly using a high-resolution Ge-detector. The gamma-spectra were processed by the GENIE-2000 code. The ITEP-developed SIGMA code was used together with the PCNUDAT nuclear decay database to identify the gamma-lines and to determine the cross-sections. The 27-Al(p,x)Na-22 reaction was used to monitor the proton flux. The measured yields are compared with calculation the LAHET (with ISABEL and Bertini options), CEM95, CEM2k, CASCADE, CASCADE/INPE, INUCL, and YIELDX codes. Estimates of the mean deviation factor are used to demonstrate the predictive power of the codes. The results obtained may be of interest in studying the parameters of the Pb and W target modules of the hybrid Accelerator-Driven System (ADS) facilities.Comment: 18 pages, 9 figures, 4 tables, LaTeX, submitted to Proc. Int. Meeting SATIF-5, July 18-21, 2000, Paris, Franc

Threshold Reaction Rates Inside and on the Surface of Thick W-Na Target Irradiated with 0.8 GeV Protons

The preliminary results are presented of the experimental determination of threshold reaction rates in experimental samples made of Al, Co, Bi, In, Au, to name but a few, placed both inside and on the surface of extended thick W-Na target irradiated with 0.8 GeV protons. The target consists of 26 alternating discs each 150 mm in diameter: 6 tungsten discs are 20 mm thick, 7 tungsten discs are 40 mm thick, and 13 sodium discs are 40 mm thick. The relative position of discs is matched with the aim of flattening the neutron field along the target surface. The comparison is made of the measured rates with results of their simulation using the LAHET and KASKAD-S codes, and the ENDF/B6, MENDL2, MENDL2P, SADKO-2, and ABBN-93 databases. The results are of interest both in terms of integral data collection and to test the up-to-the-date predictive power of the codes applied in designing of hybrid Accelerator Driven System (ADS) systems that use tungsten targets cooled with sodium.Comment: 7 pages, 3 figures, 2 tables, LaTeX, submitted to Proc. Int. Meeting SATIF-5, July 18-21, 2000, Paris, Franc

Spectral Measurements of Neutrons from Pb, W, and Na Targets Irradiated by 0.8 AND 1.6 GeV Protons

Preliminary results of neutron spectra measurements from Pb, W, and Na targets irradiated by 0.8 and 1.6 GeV protons are presented. Measurements have been carried out using the proton beam extracted from the ITEP synchrotron and the TOF technique. Neutron registration has been carried out using BICRON MAB-511 liquid scintillation counters. Spectra measured at angles of 30, 60, 90, 120, and 150 degrees have been compared with results of their simulation using the LAHET code system and the code CEM2k. The results are of interest both from data gathering viewpoint and as a benchmark of the up-to-the-date predictive powers of codes applied to design the hybrid Accelerator Driven Systems (ADS) using lead or lead-bismuth targets and sodium-cooled targets.Comment: 10 pages, 8 figures, 2 tables, LaTeX, submitted to Proc. Int. Meeting SATIF-5, July 18-21, 2000, Paris, Franc