Energy Loss of Li(n+) and C(n+) Ions with MeV Energies in Polycarbonate and Polypropylene

0368400 - ÚJF 2012 eng A - Abstract
Mikšová, Romana - Macková, Anna - Hnatowicz, Vladimír - Peřina, Vratislav
Energy Loss of Li(n+) and C(n+) Ions with MeV Energies in Polycarbonate and Polypropylene.
[Energy Loss of Li(n+) and C(n+) Ions with MeV Energies in Polycarbonate and Polypropylene.]
Abstracts by session. Crete : 11th International Conference on Applications of Nuclear Techniques. Vol. M88. (2011), s. 23-23.
[11th International Conference on Applications of Nuclear Techniques. 12.06.2011-18.06.2011, Crete]
R&D Projects: GA AV ČR(CZ) 106/09/0125; GA MŠMT(CZ) LC06041
Institutional research plan: CEZ:AV0Z10480505
Keywords : energy loss * straggling * heavy ions * polymers
Subject RIV: BG - Nuclear, Atomic and Molecular Physics, Colliders

Stopping power and straggling of 5.0 – 7.2 MeV Lin+ ions (n=2) and 10.9 – 12.3 MeV Cn+ ions (n=4) in polycarbonate (PC) and polypropylene (PP) foils were measured on Tandetron 4130 MC accelerator. The ions scattered from very thin, primary gold target were registered by surface barrier detector partially covered with polymer foil. The stopping power was determined from the energy difference between the RBS signal of direct and slowed down ions. Foil thickness was determined by weighting. The measured stopping powers were compared with those calculated by SRIM 2006 code. The measured stopping powers are higher than calculated ones, the differences being within 0,3-2,9% for Lin+ in PC, 0,2-2,6% for Lin+ in PP, 2,9-5,4% for Cn+ in PC and 3,3-5,7% for Cn+ in PP. Energy straggling determined from the width of the RBS signals corrected for spectrometer resolution, thickness of the gold target and change in the stopping power were found to be higher than those estimated according to Bohr’s theory.

Stopping power and straggling of 5.0 – 7.2 MeV Lin+ ions (n=2) and 10.9 – 12.3 MeV Cn+ ions (n=4) in polycarbonate (PC) and polypropylene (PP) foils were measured on Tandetron 4130 MC accelerator. The ions scattered from very thin, primary gold target were registered by surface barrier detector partially covered with polymer foil. The stopping power was determined from the energy difference between the RBS signal of direct and slowed down ions. Foil thickness was determined by weighting. The measured stopping powers were compared with those calculated by SRIM 2006 code. The measured stopping powers are higher than calculated ones, the differences being within 0,3-2,9% for Lin+ in PC, 0,2-2,6% for Lin+ in PP, 2,9-5,4% for Cn+ in PC and 3,3-5,7% for Cn+ in PP. Energy straggling determined from the width of the RBS signals corrected for spectrometer resolution, thickness of the gold target and change in the stopping power were found to be higher than those estimated according to Bohr’s theory.
Permanent Link: http://hdl.handle.net/11104/0202755