New measurements of W-values for protons and alpha particles.

U Giesen, J Beck

Journal: Radiation protection dosimetry 2015;161(1-4):23-6

PMID: 24262925

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Abstract

The increasing importance of ion beams in cancer therapy and the lack of experimental data for W-values for protons and heavy ions in air require new measurements. A new experimental set-up was developed at PTB and consistent measurements of W-values in argon, nitrogen and air for protons and alpha particles with energies from 0.7 to 3.5 MeV u(-1) at PTB, and for carbon ions between 3.6 and 7.0 MeV u(-1) at GSI were carried out. This publication concentrates on the measurements with protons and alpha particles at PTB. The experimental methods and the determination of corrections for recombination effects, beam-induced background radiation and additional effects are presented.

Address: Physikalisch-Technische Bundesanstalt (PTB), Bundesallee 100, Braunschweig 38116, Germany [email protected].; Physikalisch-Technische Bundesanstalt (PTB), Bundesallee 100, Braunschweig 38116, Germany.

DOI: 10.1093/rpd/nct282

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MeSH Terms: Air, Alpha Particles, Argon, Background Radiation, Electrons, Equipment Design, Gases, Heavy Ion Radiotherapy, Humans, Ions, Neoplasms, Nitrogen, Protons, Radiometry, Radiotherapy Dosage