This work features preliminary results from a recent experimental campaign at IFIN-HH, Romania, aimed measuring lifetimes of excited states in the neutron-rich 180Hf, by means RDDS technique. The 181Ta(11B,12C)180Hf proton pick-up reaction was used to populate 180Hf nucleus. ROSPHERE array loaded with 25 HPGe detectors employed for detection γ transitions depopulating levels interest. coupled S...

For the medical linear accelerators (linac) that utilize more than 10 MV of photon energy, components inside linac head become radioactivate during 10–15-year operating cycle. Prior to disposal, radioactive waste must be evaluated for activity, and same procedure should followed linacs. In Republic Korea, regulation methodology radioactivity evaluation is not established yet. this study, we emp...

Tobacco samples were collected from different tobacco markets Antalya in Turkey. To calculate natural radionuclides activity concentration, counted for 86400 seconds by using high purity germanium (HPGe) detector. Activity concentrations of 226Ra, 232Th and 40K found higher than minimum detectable (MDA). 137Cs was not detected any sample. concentration range 83±15 Bqkg-1 to 325±45 Bqkg-1, 29±5 ...

Modern coaxial and planar HPGe detectors allow a precise determination of the energies and trajectories of the impinging gamma-rays. This entails the location of the gamma interactions inside the crystal from the shape of the delivered signals. This paper reviews the state of the art of the analysis of the HPGe response function and proposes methods that lead to optimum signal decomposition. Th...

The use of modeling programs such as MCNP to predict the response of HPGe detectors is increasing in importance. Accurate simulation of germanium detectors to incident gamma rays relies on knowledge of the performance of the detector in different detector-source geometries. Two important performance parameters are the resolution and sensitivity. The resolution is the FWHM and FW.1M/FWHM ratio. ...

An α-particle irradiator, enabling high-precision irradiation of cells for in vitro studies, has been constructed. The irradiation source was a (241)Am source, on which well inserts containing cancer cells growing in monolayer were placed. The total radioactivity, uniformity, and α-particle spectrum were determined by use of HPGe detector, Gafchromic dosimetry film, and PIPS detector measuremen...

ESA’s INTErnational Gamma-Ray Astrophysics Laboratory (INTEGRAL) will be launched in 2002. One of its two main instruments is the Spectrometer SPI. It uses 19 HPGe detectors to observe the sky in the energy range of 20 keV to 8 MeV with a resolution of ∆E/E ≈ 0.2%. Directional information is obtained using a coded mask. The expected angular resolution is about 2°. The SPI Imaging Test Setup (SP...

We report on the use of grazing incidence gamma-ray mirrors to serve as a narrow bandpass filter for advanced non-destructive analysis (NDA) of spent nuclear fuel. The purpose of the mirrors is to limit the radiation reaching a HPGe detector to narrow spectral bands around characteristic emission lines from fissile isotopes in the fuel. This overcomes the normal rate issues when performing gamm...