Spatial distributions of residuals produced inside a spallation target

• Published in: Radiation protection dosimetry Vol. 115; no. 1-4; pp. 648 - 651
• Main Authors: Pohorecki, Wladyslaw, Horwacik, Tomasz, Janczyszyn, Jerzy, Taczanowski, Stefan, Bamblevski, Valentin P., Gustov, Sergey A., Mirokhin, Igor V., Molokanov, Aleksander G., Polanski, Aleksander
• Format: Journal Article
• Language: English
• Published: England Oxford University Press 01-01-2005
• Subjects: Bismuth - chemistry; Bismuth - radiation effects; Computer Simulation; Linear Energy Transfer; Models, Statistical; Monte Carlo Method; Particle Accelerators; Radiation Dosage; Radioisotopes - chemistry; Radioisotopes - radiation effects; Radiometry - methods; Scattering, Radiation
• ISSN: 0144-8420; 1742-3406
• DOI: 10.1093/rpd/nci005

The spallation target model of an accelerator driven system (ADS), consisting of six 5cm thick and 16cm in diameter Pb segments, was constructed. Three sets of 17 Bi samples (1/2 inch in diameter and 1 mm thick) were placed in 3 Pb disc-shaped holders inside the target at 5, 10 and 15 cm from its front. After irradiation with 660 MeV proton beam γ-spectra of radioisotopes produced in Bi were collected several times for each sample with the use of HPGe detectors in order to identify the radioisotopes and to determine their absolute activities. Their spatial distributions were then compared with respective values obtained in the calculations made with the use of FLUKA and/or MCNPX code. A fair agreement with the experiment has been observed.