title: Peak-to-valley ratios for three different HPGe detectors for the assessment of 137Cs deposition on the ground and the impact of the detector field-of-view.
abstract: The peak-to-valley (PTV) method was investigated experimentally comparing PTV ratios for three HPGe detectors, with complementary Monte Carlo simulations of scatter in air for larger source-detector distances. The measured PTV ratios for 137Cs in air were similar for three different detectors for incident angles between 0 and 90°. The study indicated that the PTV method can differentiate between surface and shallow depth sources if the detector field of view is limited to a radius of less than 3.5m.
authors.affiliation: Medical Radiation Physics, Department of Translational Medicine, Lund University, Skåne University Hospital Malmö, SE-205 02 Malmö, Sweden.
authors.forename: Karl
authors.initials: K
authors.lastname: Östlund
authors.affiliation: Medical Radiation Physics, Department of Translational Medicine, Lund University, Skåne University Hospital Malmö, SE-205 02 Malmö, Sweden.
authors.forename: Christer
authors.initials: C
authors.lastname: Samuelsson
authors.affiliation: Medical Radiation Physics, Department of Translational Medicine, Lund University, Skåne University Hospital Malmö, SE-205 02 Malmö, Sweden.
authors.forename: Sören
authors.initials: S
authors.lastname: Mattsson
authors.affiliation: Medical Radiation Physics, Department of Translational Medicine, Lund University, Skåne University Hospital Malmö, SE-205 02 Malmö, Sweden.
authors.forename: Christopher L
authors.initials: CL
authors.lastname: Rääf
keywords: Cs-137; Deposition; Depth distribution; Field of view; HPGe; In situ; MCNP; PTV ratio