Hyperpure germanium detector introduction the aim of this experiment is to be familia r with a hyperpure germ anium hpge detector used as a ray spectrometer. Liquid nitrogen ln 2 or electromechanical cooling system are both available. A 60co source spectrum, collected with our first hpge detector, is shown in figure 1. The accuracy of beam energy depends solely on the detection results of hpge detector. Semiconductor detectors find broad application for radiation protection, gamma and xray spectrometry, and as particle detectors. High purity germanium detector to determine the true cause of the radiation. Reliability of the generic hpge detector characterization. A methodology to determine the full energy peak efficiency fepe for precise gamma spectrometry measurements of environmental samples with highpurity germanium hpge detector, valid when this efficiency depends on the energy of the radiation e, the height of the cylindrical sample h, and its density. To complete the gamma spectroscopy laboratory set caen sys includes in its offer a wide choice of high purity germanium detectors hpge. The falcon 5000 unit is a highly powerful and customizable field. The majority of gamma spectroscopy applications such as those found in counting laboratories involve the energy range 40 kev upward. Hpge detector technology with ultralow microphonic electrical cooling. Design and setup of a new hpge detector based body counter.
Hpge detector 100 cm 3 for a point source at 12 cm between 10 and 1500 kev linear scale energy kev 0 200 400 600 800 1200 1400 1600 1800 efficiency % 0. Pdf studying of characteristics of the hpge detector for. Gem series coaxial hpge detector product configuration guide ptype coaxial hpge detectors for high performance gamma spectroscopy in the energy range of 40 kev and up. The methods are illustrated concretely with a new educational program named gefica germanium detector field calculator.
This simulation foresees only aluminum, germanium and vacuum to describe the hpge detector. The dependence of the energy resolution on the shaping parameter will be investigated. High purity germanium hpge is the only radiation detection technology that provides. On two cryogenic systems of high purity germanium detector.
In angle, the input data are categorized as detector, container, geometry, source and reference efficiency curve. A semiconductor detector in ionizing radiation detection physics is a device that uses a semiconductor usually silicon or germanium to measure the effect of incident charged particles or photons. To explain this, we notice that hpge detector efficiency has a maximum near that same energy 6. This means that the apparent radius of the detector crystal r in our simplified model increases as photon energy approaches 100 kev, because the detector becomes increasingly opaque to gamma rays.
Best absolute efficiency for the given ieee standard relative efficiency in your. Monte carlo calculations of the hpge detector efficiency for radioactivity measurement of large volume environmental samples. The high purity germanium detectors hpge complete set is composed by the following components. The purpose of this thesis is to assemble a hpge detector intended to be used in a mass. Pdf the photopeak efficiency, the peak to valley ratio, the energy resolution and the minimum detectable activity of a hpge detector were. Falcon 5000 portable hpgebased radionuclide identifier data. This is a great simplification in defining the matrix composition and it allows, also, to neglect thin layers inside hpge endcup i. Derivation of an efficiencycalibration simulation for a well. Modeling a hpge detectors absolute efficiency as a function. This lithiumdiffused layer is about several hundred m thick. The majority of the data requirement is for the detector. The holder is generally made of aluminum and is typically 1 mm thick. Dec 03, 2010 diy brick rocket stove cooking without electrical power duration. Pdf a simple method for the characterization of hpge detectors.
Profile hpge photon detector product configuration guide. Determination of the photopeak detection efficiency of a hpge detector, for volume sources, via monte carlo simulations by raphael wesley damon dissertation submitted in fulfilment of the requirements for the master of science degree in physics at the university of the western cape july 2005 supervisors. For photon spectroscopy in the energy region of hundred kev or several mev, much thicker semiconductor detectors are required. Mca8000a application programming interface api the mca8000a can be controlled through an api interface using the pmcadll. Note hpge detector single element canberra industries. In internal dosimetry the bege gives the high resolution and low background need for actinide lung burden analysis and the efficiency and resolution at high energy for whole body counting.
Studying of characteristics of the hpge detector for radioactivity measurements article pdf available in journal of instrumentation 810 january 20 with 6,095 reads how we measure reads. Germanium detectors allow for an accurate detection of complex contamination cases involving multiple nuclides, but they. In addition to the highest resolution detector on the market, the falcon 5000 integrates a unique bege detector that is superior in efficiency and lower in cost than standard coaxial detectors. The mirion intelligent preamplifier ipa for highpurity germanium hpge detectors is a lownoise, highspeed resistive feedback preamplifier designed for high resolution gamma spectroscopy and timing measurements. Characterization of an hpge detector for experiments. Pdf escape probability of 511kev annihilation photons. Germanium detectors are semiconductor diodes having a pin structure in which the intrinsic i region is sensitive to ionizing radiation, particularly x rays and gamma rays. Hpge detector were performed in order to determine the parameters of anisotropic. Relative probability of each of the three types of interactions as a function of energy. The purpose of an hpge detector is to convert gamma rays into electrical impulses which can be used, with suitable signal processing, to determine their energy and intensity. Gammaw performs fullyautomated peak search, or allows users to define tentative or wellknown peak positions calc activates analysis of defined roi or spectrum range. The type depends on the concentration of donor or acceptor atoms in the crystal. The main purpose of this paper is to validate the generic detector characterization for an hpge detector falcon 5000 companion to isocs software, to explore the possibilities of combining gamma counting system with isocs software calculations to improve the absolute measurement of nm samples i.
Assessment of radiological contamination of soils due to. Flamanc canberra specialty detectors lingolsheim ringberg castle, october 2015. Broad energy germanium detectors bege in addition to routine sample counting, there are many applications in which the bege detector really excels. Hpge detector field calculation methods demonstrated with an. Gammaw gammaray analysis software for hpge detectors. Germanium hpge detector, which is the key instru ment of bems. The spectrometers are used for radionuclide analysis and for monitoring of activity in the nuclear industry and related environment monitoring. The rules are given below and are based on some basic concepts about how the detection process works, how gamma rays penetrate materials, and the. Mcnp hpge detector benchmark with previously validated. Gammaray efficiency of a hpge detector as a function of energy and geometry.
Calculation of full energy peak efficiency for hpge detector using monte carlo method alaa b. Profile hpge photon detector product configuration guide applicationmatched ptype hpge detectors, optimized for specific sample types, gamma energy ranges and measurement geometries. This reliable robotic sample changer increases the productivity and reduces the possibility of health risks hpge systems hpge all in one. An exact copy of the detector model generated for cyltran was reproduced as an mcnp input file and the detection efficiency was calculated similarly with the methodology used in previous experimental measurements and simulation of a 280 cm 3 hpge detector. Gamma rays from a,p reactions october 6, 2011 here are a series of experiments involving alpha particle transmutation of light elements and detection of the resulting gamma radiation signatures. Because high purity germanium detectors hpge has relatively low band gap, these detectors must be cooled down.
Pdf a functional approach to the concept of pulse shape synthesis is introduced here. Escape probability of 511kev annihilation photons from hpge detectors. Thin contact structure of the hpge detector accompanying with input window made of beryllium or carbon fiber guarantee low energy photon transition to the hpge crystal and its registration. These results are promising for the production of an hpge detector, but taking into account the well known. Gem series coaxial hpge detector product configuration guide. Mca8000a multichannel analyzer software downloads amptek. When energy is deposited in the detector, the ipa detector converts the charge to a stepfunction output pulse of which. Why high purity germanium hpge radiation detection. Part 1 the genie 2000 operations manual, including the s501 gamma analysis. Details of the input to angle are available on ortecs help documentation. The choice of the best hpge detector for your particular measurement situation is based on a few simple rules. The detector holder is held in place by an antimicrophonic stabilizer. This volume contains the operating manuals for four related programs, each separated by a blue divider.
Hpge detector fullenergy peak efficiency calculation for. Live simple, live free tinyhouse prepper recommended for you. Both energy resolution and efficiency will be explored as a function of ray energy. The detector holder as well as the outer vac uum jacket or endcap are thin to avoid attenuation of low energy photons. We have performed energy calibration, resolution, counting efficiencies of the hpge detector, quality control chart qc for instrumental quality, etc. In addition to the highest resolution detector on the market, the falcon 5000 instrument integrates a unique bege detector that is superior in efficiency and lower in cost than standard coaxial detectors. Ruggedized sealed hpge detectors for harsh environments, space, airborne or under water canberra introduces in this document a new compact detector for high throughput xray spectrometry with unprecedented energy resolutions at high count rate. Full energy peak efficiency calibration of hpge detector by mcnp. Determination of the photopeak detection efficiency of a hpge. Fadhil department of astronomy and space, college of science, university of baghdad, baghdad, iraq abstract this research presents results on the full energy peak efficiency of a high purity. To connect the diode to an electrical circuit to amplify the signal, we need to put. Input window of the detector is integrated into the end cap of the detector by using hightech vacuumtight materials.
The crucial condition for hpge detector functioning properly is the low temperature 15 that allows the single crystalline germanium structure of the detector to. Because of the fact that the photons themselves are invisible to the detector, a detector needs to have a couple of speci. Precise determination of hpge detector efficiency for gamma. Canberra makes a wide variety of detector types which are described in this instruction manual. The third step is to properly consider the dead layer dl of the hpge crystal.