Fragmentation of 370 MeV/n Ne-20 and 470 MeV/n Mg-24 in light targets
Artikel i vetenskaplig tidskrift, 2010

Total charge-changing cross sections and cross sections for the production of projectile-like fragments were determined for fragmentation reactions induced by 370 MeV/n Ne-20 ions in water and lucite, and 490 MeV/n Mg-24 ions in polyethylene, carbon and aluminum targets sandwiched with CR-39 plastic nuclear track detectors. An automated microscope system and a track-to-track matching algorithm were used to count and recognize the primary and secondary particles. The measured cross sections were then compared with published cross sections and predictions of different models. Two models and the three-dimensional Monte Carlo Particle Heavy Ion Transport Code System (PHITS) were used to calculate total charge-changing cross sections. Both models agreed within a few percent for the system Mg-24 + CH2, however a deviation up to 20% was observed for the systems Ne-20 + H2O and C5H8O2, when using one of the models. For all the studied systems, PHITS systematically underestimated the total charge-changing cross section. It was also found that the partial fragmentation cross sections for Mg-24 + CH2 measured in present and earlier works deviated up to 20% for Z = 6-11. Measured cross sections for the production of fragments (Z = 4-9) for Ne-20 + H2O and C5H8O2 were compared with predictions of three different semi-empirical models and JQMD which is used in the PHITS code. The calculated cross sections differed from the measured data by 10-90% depending on which fragment and charge was studied, and which model was used. (C) 2010 Elsevier Ltd. All rights reserved.

collisions

CR-39

Heavy ions

carbon targets

relativistic nuclei

Nuclear fragmentation

hydrogen

Total and partial cross sections

absorption cross-sections

ions

charge

accurate universal parameterization

helium

Författare

A. N. Golovchenko

Joint Institute for Nuclear Research

Lembit Sihver

Chalmers, Teknisk fysik, Nukleär teknik

S. Ota

National Institute of Radiological Sciences

Waseda University

J. Skvarc

Isaac Newton Group

N. Yasuda

National Institute of Radiological Sciences

S. Kodaira

National Institute of Radiological Sciences

G. N. Timoshenko

Joint Institute for Nuclear Research

M. Giacomelli

Slovenian Nuclear Safety Administration

Radiation Measurements

1350-4487 (ISSN)

Vol. 45 7 856-860

Ämneskategorier

Subatomär fysik

DOI

10.1016/j.radmeas.2010.03.006