The stopping powers and energy straggling of heavy ions in polymer foils

0433037 - ÚJF 2015 RIV NL eng J - Článek v odborném periodiku
Mikšová, Romana - Macková, Anna - Malinský, Petr - Hnatowicz, Vladimír - Slepička, P.
The stopping powers and energy straggling of heavy ions in polymer foils.
Nuclear Instruments & Methods in Physics Research Section B. Roč. 331, JUL (2014), s. 42-47. ISSN 0168-583X. E-ISSN 1872-9584
Grant CEP: GA ČR GA106/09/0125; GA MŠMT(XE) LM2011019
Institucionální podpora: RVO:61389005
Klíčová slova: energy loss * energy straggling * heavy ions * polymers * AFM method
Kód oboru RIV: BG - Jaderná, atomová a mol. fyzika, urychlovače
Impakt faktor: 1.124, rok: 2014

The stopping power and energy straggling of Li-7, C-12 and O-16 ions in thin poly(etheretherketone) (PEEK), polyethylene terephthalate (PET) and polycarbonate (PC) foils were measured in the incident beam energy range of 9.4-11.8 MeV using an indirect transmission method. Ions scattered from a thin gold target at an angle of 150 degrees were registered by a partially depleted PIPS detector, partly shielded with a polymer foil placed in front of the detector. Therefore, the signals from both direct and slowed down ions were visible in the same energy spectrum, which was evaluated by the ITAP code, developed at our laboratory. The ITAP code was employed to perform a Gaussian-fitting procedure to provide a complete analysis of each measured spectrum. The measured stopping powers were compared with the predictions obtained from the SRIM-2008 and MSTAR codes and with previous experimental data. The energy straggling data were compared with those calculated by using Bohr's, Lindhard-Scharff and Bethe-Livingston theories.
Trvalý link: http://hdl.handle.net/11104/0237354