title: Dosimetric characterization of silicon and diamond detectors in low-energy proton beams.
abstract: The dosimetric behaviour of a Scanditronix p-type silicon diode and a PTW natural diamond detector was studied in low-energy proton beams in the 8.3-21.5 MeV range. The properties investigated were linearity, reproducibility, dose rate dependence, energy and linear energy transfer (LET) dependence. The influence of detector thickness on the results of depth dose measurements was also demonstrated. A Markus parallel plate ionization chamber was used for reference dosimetry. Silicon diode and diamond detectors showed linearity at therapeutic dose level, reproducibility better than 1% (1sigma) and sensitivity variation with dose rate and proton energy.
authors.affiliation: Physics Laboratory, Istituto Superiore di Sanità, Rome, Italy. sandro.onori@iss.it
authors.forename: S
authors.initials: S
authors.lastname: Onori
authors.forename: C
authors.initials: C
authors.lastname: De Angelis
authors.forename: P
authors.initials: P
authors.lastname: Fattibene
authors.forename: M
authors.initials: M
authors.lastname: Pacilio
authors.forename: E
authors.initials: E
authors.lastname: Petetti
authors.forename: L
authors.initials: L
authors.lastname: Azario
authors.forename: R
authors.initials: R
authors.lastname: Miceli
authors.forename: A
authors.initials: A
authors.lastname: Piermattei
authors.forename: L B
authors.initials: LB
authors.lastname: Tonghi
authors.forename: G
authors.initials: G
authors.lastname: Cuttone
authors.forename: S
authors.initials: S
authors.lastname: Lo Nigro
mesh_terms: D018130:Diamond; D004307:Dose-Response Relationship, Radiation; D007477:Ions; D019047:Phantoms, Imaging; D011522:Protons; D011874:Radiometry / Q000295:instrumentation* / Q000379:methods*; D012825:Silicon; D014867:Water
chemical_list: D007477:Ions; D011522:Protons; D014867:Water; D018130:Diamond; D012825:Silicon