Detector gamma rays. Medical search. Frequent questions

balloon-borne pulse-height analyzer accepts gamma radiation between 35 keV and 560 keV, with all photons in excess of 560 keV counted in one integral channel. (stratocat.com.ar)
The new pixel-based silicon detector technology could be used on next-generation gamma-ray observatories to detect highly energetic photons emanating from the most powerful events in the universe, including colliding galaxies and black holes. (worldpeoplenews.com)
The new detectors would sense these photons much like a digital camera and use far less power than current space-based detectors. (worldpeoplenews.com)
His research focuses on developing superconducting sensors and readout into arrays of microcalorimeter detectors capable of measuring the energy of individual photons and particle decays in ways that are difficult or impossible with conventional detector techniques. (nist.gov)
Gamma rays consist of high energy photons with energies above about 100 keV . (wikidoc.org)
X-ray photons are generated by energetic electron processes, gamma rays by transitions within atomic nuclei. (wikidoc.org)
The photoelectric effect is the dominant energy transfer mechanism for x-ray and gamma ray photons with energies below 50 keV (thousand electron volts ), but it is much less important at higher energies. (wikidoc.org)
Long before scientists could detect gamma rays from cosmic sources, they had suspected that the universe may be producing photons in this energy range. (newworldencyclopedia.org)
In 1961, the Explorer 11 satellite carried the first space-based gamma-ray telescope, which detected less than 100 cosmic gamma-ray photons. (newworldencyclopedia.org)
[1] As these photons seemed to come from all directions, they suggested the presence of a uniform "gamma-ray background" in the universe. (newworldencyclopedia.org)
The microscope is based on imaging low-energy gamma-ray and x-ray photons that result from the decay of radioactive labels such as 111In and 99mTc mentioned above. (ca.gov)
Unlike visible light photons, these gamma- and x-ray photons can penetrate tissue unscattered and therefore can be used in vivo for high resolution microscopy. (ca.gov)
This detector has the ability to record only the photons of low energy that have traversed the coded aperture holes while rejecting higher energy photons from the radioactive decays. (ca.gov)
After travelling at most a few millimetres, a positron will collide with an electron, simultaneously releasing two gamma rays (photons) with an energy of 511 keV into opposite directions. (lu.se)
These two photons are detected by the PET camera and simultaneously localized within a fixed period of time by a series of opposing detectors, which correspond to multiple rings of scintillation crystals. (lu.se)
Gamma-ray photons emitted from the internal distributed radiopharmaceutical penetrate through the animal's or patient's body and are detected by a single or a set of collimated radiation detectors. (lu.se)
Most radionuclides release high-energy photons as gamma rays but PET uses radionuclides that release particles called positrons. (msdmanuals.com)

AGATA, for advanced gamma tracking array, is a highly segmented High Purity Germanium (HPGe) detector array. (wikipedia.org)
ISO 19581 specifies a screening test method to quantify rapidly the activity concentration of gamma-emitting radionuclides, such as 131 I, 132 Te, 134 Cs and 137 Cs, in solid or liquid test samples using gamma-ray spectrometry with lower resolution scintillation detectors as compared with the HPGe detectors (see IEC 61563). (iso.org)
Due to the uncertainty associated with the results obtained with this test method, test samples requiring more accurate test results can be measured using high-purity germanium (HPGe) detectors gamma-ray spectrometry in a testing laboratory, following appropriate preparation of the test samples [7][8] . (iso.org)
The gamma rays emitted through the (19)F(n,gamma)(20)F reaction were measured using a HPGe detector. (cdc.gov)
The measurements were performed using High Purity Germanium (HPGe) detector. (bvsalud.org)

The effects of prolonged annealing at elevated temperatures have been investigated in a 53cm3 closed-end coaxial high purity germanium detector in the reverse electrode configuration. (lancs.ac.uk)

AGATA is capable of high counting event rates and can be coupled with ancillary detectors, such as magnetic spectrometers, fast-timing detectors charged particles or neutron detectors. (wikipedia.org)
These phenomena included supernova explosions, interactions of cosmic rays (very energetic charged particles in space) with interstellar gas, and interactions of energetic electrons with magnetic fields . (newworldencyclopedia.org)

Current areas of interest include the study of highly charged ions and exotic atoms, materials analysis and x-ray spectroscopy, astrophysics, radioactivity standards and x-ray fundamental parameter metrology for industry, 3D x-ray nanoprobe of circuits, and nuclear materials accounting and safeguards. (nist.gov)
Results of an extensive radioassay program are reported, in which material samples have been screened with gamma-ray spectroscopy, mass spectrometry, and \(^{222}\) Rn emanation measurements. (springer.com)
Gamma-ray spectroscopy and mass spectrometry are employed to determine the intrinsic radioactivity of construction materials and can reach sensitivities down to 10-100 \(\upmu \) Bq/kg and 1-10 \(\upmu \) Bq/kg, respectively. (springer.com)

IceCube has become the first neutrino telescope with a sensitivity below the TeV neutrino flux predicted from gamma-ray bursts if gamma-ray bursts are responsible for the observed cosmic-ray flux above 1018eV. (nyu.edu)
Gamma-ray bursts are the brightest known electromagnetic events in the universe, and can be created by a few different phenomena . (space.com)
In addition, they have detected immensely powerful gamma-ray bursts (GRBs) that appear to come from sources in deep space. (newworldencyclopedia.org)
Detectors aboard the Vela satellite series, designed to detect flashes of gamma rays from nuclear bomb blasts, began to record bursts of gamma rays not from the vicinity of the Earth but from deep space. (newworldencyclopedia.org)
It predominantly studied X-rays, but also observed gamma-ray bursts. (newworldencyclopedia.org)

Recent evolutions in germanium detector technology, imaging techniques, electronics, and cryogenics make such a system viable. (sbir.gov)

Conference on Physics from Large Gamma-Ray Detector Arrays. (atomki.hu)
The workshop on "Hadron-Hadron and Cosmic-Ray Interactions at multi-TeV Energies" held at the ECT* centre (Trento) in Nov.-Dec. 2010 gathered together both theorists and experimentalists to discuss issues of the physics of high-energy hadronic interactions of common interest for the par- ticle, nuclear and cosmic-ray communities. (lu.se)

The Very Energetic Radiation Imaging Telescope Array System (VERITAS) is an array of seven 10m aperture telescopes used for gamma-ray astronomy in the 50 GeV to 50 TeV (1 TeV= 10 12 electron Volt) energy range. (spie.org)
Gamma-ray astronomy is a branch of astronomy that deals with the detection and study of gamma rays in the cosmos. (newworldencyclopedia.org)
Thus, gamma-ray astronomy provides the opportunity for scientists to study objects and phenomena in the universe that are associated with extremely high energies. (newworldencyclopedia.org)
For this reason, the development of gamma-ray astronomy was delayed until it became possible to place detectors above most (if not all) of the atmosphere, using balloons or spacecraft. (newworldencyclopedia.org)
In the late 1960s and early 1970s, gamma-ray astronomy received an unexpected boost from a constellation of defense satellites. (newworldencyclopedia.org)
The field of gamma-ray astronomy took great leaps forward with the SAS-2 (1972) and the COS-B (1975-1982) satellites. (newworldencyclopedia.org)
During its High Energy Astronomy Observatory program in 1977, NASA announced plans to build a "great observatory" for gamma-ray astronomy. (newworldencyclopedia.org)

Although gamma-ray measurements supported that radioactivity levels in almost all foodstuffs were far below the Japanese regulatory limit, it was unknown how much of the detected radioactivity originated from the Fukushima accident as opposed to pre-Fukushima events such as the atmospheric nuclear explosions 12 that have been conducted since 1945 and the Chernobyl nuclear power plant accident of 1986. (nature.com)
In addition to the quantitative measurement of gamma radioactivity, gamma spectrometry can be used for the identification of specific gamma emitters in a mixture of radionuclides. (astm.org)
Geiger counters are commonly used to measure the amount of radioactivity, but there are other types of detectors that may be used. (cdc.gov)

Gamma ray and neutron emitting isotopes can be located and identified with the use of a directional gamma ray and neutron detection system having excellent spectroscopic energy resolution. (sbir.gov)
GW170817 refers to the gravitational waves observed from the merger, while GRB 170817A looks at the gamma-ray burst produced by the neutron-star merger. (space.com)

Space telescopes are useful for the study of cosmic gamma rays, most of which are absorbed by the Earth's atmosphere. (newworldencyclopedia.org)

One of the main challenges during the ultra-high count rate gamma-ray spectrometry is the large dead time. (mcmaster.ca)
1.1 This test method covers the measurement of gamma-ray emitting radionuclides in water by means of gamma-ray spectrometry. (astm.org)
Information on specific application of gamma spectrometry is also available in the literature (3). (astm.org)
Section 3 summarizes the results obtained in the gamma screening campaign including complementary mass spectrometry measurements. (springer.com)

The test method applies to the measurement of gamma-emitting radionuclides such as 131 I, 134 Cs and 137 Cs. (iso.org)
Samples collected from the island were analyzed using a NaI detector to measure the concentrations of radionuclides such as 238U, 232Th, 226Ra, and 40K, which were found to be within acceptable levels according to UNSCAR guidelines. (bvsalud.org)

Using sample sizes of 0,5 l to 1,0 l in a Marinelli beaker and a counting time of 5 min to 20 min, decision threshold of 10 Bq·kg −1 can be achievable using a commercially available scintillation spectrometer [e.g. thallium activated sodium iodine (NaI(Tl)) spectrometer 2" ϕ × 2" detector size, 7 % resolution (FWHM) at 662 keV, 30 mm lead shield thickness]. (iso.org)
As MESSENGER approaches Mercury, the X-ray spectrometer starts taking measurements more rapidly. (planetary.org)
However, the X-ray spectrometer operates best within about 100 kilometers of Mercury, a distance it won't enjoy until MESSENGER actually goes in to orbit in 2011. (planetary.org)
We report on the 1,000-element transition-edge sensor (TES) x-ray spectrometer implementation of the TOMographic Circuit Analysis Tool (TOMCAT). (nist.gov)

The research project will combine the study of the perovskite scintillator materials with the development of prototype radiation imaging detectors to demonstrate the performance of these materials as real imaging devices. (surrey.ac.uk)

Underground supercolliders, which have experiments employing the same silicon pixel-type detectors, accelerate protons and ions to near the speed of light in opposite directions at very high energies. (worldpeoplenews.com)

After each anneal cycle it was cooled to 77 K and the relative efficiency, peak channel location and FWHM energy resolution measured at 6 gamma-ray energies. (lancs.ac.uk)
Two separate analyses using the half-complete IceCube detector, one a dedicated search for neutrinos from pγ interactions in the prompt phase of the gamma-ray burst fireball and the other a generic search for any neutrino emission from these sources over a wide range of energies and emission times, produced no evidence for neutrino emission, excluding prevailing models at 90% confidence. (nyu.edu)
It is applicable to nuclides emitting gamma-rays with energies greater than 20 keV. (astm.org)

By using a thin CdTe device, we can overcome the charge loss problem due to the small mobility and short lifetime of holes in CdTe or CdZnTe detectors. (elsevierpure.com)

This is a breadboard of a gamma-ray detector system that Principal Investigator Regina Caputo and her team assembled to test pixel-based silicon detector technology. (worldpeoplenews.com)
In order to form the coded aperture images, GM-I has selected a 55-micron pixel silicon detector of thickness 1.0 mm. (ca.gov)

By exploiting the spatial information contained in the detector signal we can more accurately localize the γ-ray interaction than is possible by the geometry of the segments. (wikipedia.org)
The spatial information of the detector signals are known from digital pulse-shape analysis. (wikipedia.org)
Using the group's X-ray facilities and optical imaging cameras, the spatial resolution and imaging quality of the materials will be measured. (surrey.ac.uk)
The satellite carried four major instruments which have greatly improved the spatial and temporal resolution of gamma-ray observations. (newworldencyclopedia.org)

The gamma rays are detected by measuring the optical Cherenkov light emitted by the cascade of electromagnetic particles that is generated by interactions of the high energy gamma-ray with the Earth's Atmosphere. (spie.org)
Gamma rays (denoted as γ ) are a form of electromagnetic radiation or light emission of frequencies produced by sub-atomic particle interactions, such as electron-positron annihilation or radioactive decay . (wikidoc.org)
Gamma rays are generally characterized as electromagnetic radiation having the highest frequency and energy, and also the shortest wavelength (below about 10 picometer ), within the electromagnetic spectrum . (wikidoc.org)
Gamma rays are the most energetic form of electromagnetic radiation and are produced by phenomena such as explosions and high-speed collisions. (newworldencyclopedia.org)
The experiment chamber is flooded with electromagnetic radiation up to gamma rays (from scattering of the high energy electrons). (lu.se)
In particular, electronic detectors, such as CCDs (Charge Coupled Device, a type of camera), tend to get blinded by the electromagnetic radiation. (lu.se)

The Ge-detector determines the pulse-shape of the γ-ray which contains the information about the three-dimensional position of each individual interaction within the detector with the released energy in the interactions. (wikipedia.org)
The latest cosmic-ray results from various ground-based obser- vatories were also presented with an emphasis on the phenomenological modeling of the first hadronic interactions of the extended air-showers generated in the Earth atmosphere. (lu.se)
The candidate particles, ranging from protons to nuclei as massive as iron, generate "extensive air-showers" (EAS) in interactions with air nuclei when en- tering the Earth's atmosphere. (lu.se)

The Quasar Pulse M/LWD service provides directional, gamma ray, and pressure-while-drilling (PWD) measurements and telemetry to place wells accurately in extremely high-pressure and high-temperature (HPHT) environments up to 200°C/392°F. (halliburton.com)

Germanium crystals used for γ-ray detectors frequently exhibit slow or non-uniform lithium-ion drift. (ansto.gov.au)
Solid-state gamma cameras would replace the photomultipliertubes and scintillation crystals used in Anger-based systems,resulting in a truly digital gamma camera. (diagnosticimaging.com)
Digirad's technology uses cadmiumzinc telluride as a detector material and needs no photomultipliertubes or scintillation crystals. (diagnosticimaging.com)

Measurements of the gamma ray exposure rate were made with a pressurized ionization chamber. (cdc.gov)
Airborne measurements for Rn-222 were the average of 25 stations determined by alpha track detectors. (cdc.gov)
In 1988, gamma radiation measurements showed a radiation exposure rate ranging from 17 to 2,229 x 10 -3 R/yr above a bkg average of 73x10 -3 R/yr ( Bechtel, 1989a ). (cdc.gov)
Project SSM2019-5225: "Marine 14C levels around the Swedish coast" - Additional gamma spectrometric measurements and ICP-MS analysis of brown algae (Fucus spp. (lu.se)
Bone-density measurements can be performed by using X-ray methods, such as DEXA, QCT, and ultrasonic methods. (medscape.com)

However, a CdTe detector with a thickness of more than 5 mm is needed for adequate detection efficiency for gamma-rays of several hundred keV. (elsevierpure.com)
Materials for shielding gamma rays are typically measured by the thickness required to reduce the intensity of the gamma rays by one half (the half value layer or HVL). (wikidoc.org)
When a gamma ray passes through matter, the probability for absorption in a thin layer is proportional to the thickness of that layer. (wikidoc.org)

Perovskite scintillators are high-Z materials which unique radioluminescence properties, which offer energy discrimination and improved sensitivity for X-ray and gamma rays compared to traditional plastic scintillators. (surrey.ac.uk)
Other detectors (for example scintillators) are sensitive to electrons as well as protons. (lu.se)

X-ray Computed Tomography (CT) is a non-invasive technique for visualizing interior features within solid objects and for obtaining digital information on their 3-D geometries and properties. (lu.se)
Computed Tomography (CT) In computed tomography (CT), which used to be called computed axial tomography (CAT), an x-ray source and x-ray detector rotate around a person. (msdmanuals.com)

NASA scientist, Neil Gehrels, serves as your guide to this online lesson on gamma ray tools, which focuses on advances in detector technologies since the 1980s that have enabled us to capture and image high-energy phenomena. (nasa.gov)
The Compton Gamma-Ray Observatory (CGRO) was designed to take advantage of the major advances in detector technology during the 1980s, and it was launched in 1991. (newworldencyclopedia.org)

Work by Eugene Feenberg and H. Primakoff in 1948, Sachio Hayakawa and I.B. Hutchinson in 1952, and Morrison in 1958, led to the prediction that a number of different phenomena in the cosmos would result in the emission of gamma rays. (newworldencyclopedia.org)

A rotational cascade consisting of ten gamma-ray transitions, which decays to the 19/2(+) level at 2.002 MeV, was observed. (lu.se)

Simple gamma ray detector using aluminum foil covered photodiodes. (oshwlab.com)

Good energy resolution and good peak detection efficiency are difficult to obtain using such a thick CdTe detector. (elsevierpure.com)
The stacked detector enabled us to realize a detector with both high energy resolution (∼ 1%) and good efficiencies for gamma-rays up to several hundred keV. (elsevierpure.com)
New gamma energy multichannel analyzers with basic software for gamma energy calibration and peak area region of interest integration. (dmphotonics.com)
The energy resolution of the detector is 9.2 per cent full width half-maximum at 511 keV. (stratocat.com.ar)
This process allows us to not only collect energy from particles that enter the detector, but also to amplify their signals all in the same detector material. (worldpeoplenews.com)
These layers cross one another perpendicularly to create a grid that pinpoints the locations of high-energy particles created when a gamma ray hits a detector. (worldpeoplenews.com)
The tests help determine whether the energy resolution of the pixel detector is the same or better than the silicon strip detectors. (worldpeoplenews.com)
In fact, in addition to improved position sensitivity, energy resolution, and lower power consumption, the pixel detector technology would easily be the best choice for any particle-detecting mission because they are easy to produce and inexpensive, especially compared with silicon strip detectors. (worldpeoplenews.com)
In this work, we show how to use our understanding of stochastic processes in a scintillation camera and their effect on signal formation to better estimate gamma-ray interaction parameters such as interaction position or energy.To apply statistical estimation methods, we need an accurate description of the signal statistics as a function of the parameters to be estimated. (arizona.edu)
The nonlinear energy response of cryogenic x-ray microcalorimeters is usually corrected though an empirical calibration. (nist.gov)
Hard X-rays overlap the range of "long"-wavelength (lower energy) gamma rays. (wikidoc.org)
Due to their high energy content, gamma rays can cause serious damage when absorbed by living cells. (wikidoc.org)
The higher the energy of the gamma rays, the thicker the shielding required. (wikidoc.org)
This describes the case in which a gamma photon interacts with and transfers its energy to an atomic electron, ejecting that electron from the atom. (wikidoc.org)
The kinetic energy of the resulting photoelectron is equal to the energy of the incident gamma photon minus the binding energy of the electron. (wikidoc.org)
This is an interaction in which an incident gamma photon loses enough energy to an atomic electron to cause its ejection, with the remainder of the original photon's energy being emitted as a new, lower energy gamma photon with an emission direction different from that of the incident gamma photon. (wikidoc.org)
Compton scattering is thought to be the principal absorption mechanism for gamma rays in the intermediate energy range 100 keV to 10 MeV. (wikidoc.org)
Digirad, the Departmentof Energy and the Stanford Linear Accelerator Center (SLAC) signeda cooperative research and development agreement (CRADA) lastyear to fund Digirad and SLAC's work on the detectors. (diagnosticimaging.com)
Our cost estimates at this point (indicate)that the cost of the detector is prohibitively expensive giventhe improvement in energy resolution and diagnostic accuracy.Just like anything else, we expect solid-state circuitry to comedown in cost, and when it does we hope to be there with appropriateproducts. (diagnosticimaging.com)
One key to solving this question is the determination of the elemental compo- sition of cosmic rays in this energy range. (lu.se)
These radiation particles and rays carry behaves like other substances, getting into the air, water, soil, enough energy to knock out electrons from atoms and mol- plants, and animals, while also giving off radiation. (cdc.gov)
Common methods include conventional radiography, quantitative CT (QCT), single-photon absorptiometry (SPA), dual-photon absorptiometry (DPA), quantitative ultrasonography (QUS), and dual-energy x-ray absorptiometry (DEXA). (medscape.com)

With the APRA award, Caputo and her team are designing new pixel detectors optimized for potential use in space. (worldpeoplenews.com)
With AstroPix, however, particles would be recorded once they contacted a single pixel instead of silicon strip layers, giving the detector the ability to create a map of the particles' paths with fewer layers. (worldpeoplenews.com)
In this way, the pixel detector would reduce its power needs to function the best in space. (worldpeoplenews.com)
The team is testing the pixel detector in the astrophysics lab at Goddard using radioactive sources, such as cadmium, for the pixelated silicon to detect. (worldpeoplenews.com)
The AstroPiX team must prove the effectiveness of these silicon pixel detectors before the technology could be incorporated into a future gamma-ray mission, Perkins said. (worldpeoplenews.com)

To determine the position of the interaction of the γ-ray one needs to consider the shapes of the induced real and mirror signals. (wikipedia.org)

A photoelectron or Compton electron generates electrons and holes which induce image charges of opposite signs on the detector electrodes when a signal is produced. (wikipedia.org)
This is done experimentally using tightly collimated γ-ray sources with an external collimated detector for the Compton scattered coincidence. (wikipedia.org)
In passing through matter, gamma radiation ionizes via three main processes: the photoelectric effect , Compton scattering , and pair production . (wikidoc.org)
Artist's image of the Compton Gamma Ray Observatory. (newworldencyclopedia.org)

abstract = "We describe a stacked detector made of thin CdTe diode detectors. (elsevierpure.com)

The γ-ray tracking system required a compact digital signal processing electronics with high computing power. (wikipedia.org)

The AGATA detectors are Ge-detectors that are 36-fold segment with six-fold azimuthal and six-fold longitudinal segmentation. (wikipedia.org)

Significant gamma-ray emission from our galaxy was first detected in 1967 by the gamma-ray detector aboard the OSO-3 satellite. (newworldencyclopedia.org)

He works with researchers around the world to implement these superconducting detectors to address measurement challenges across numerous fields. (nist.gov)
Since the efficiency of producing fission neutrons seems to (i.e. source to detector distance) is required for a measurement the have reached its maximum with state-of-the-art high flux reactors efficiency in terms of the FOM has been derived by Schober et al. (lu.se)

This instrument was flown previously but for this particular flight the detector itself was modified: an additional active collimator was inserted in the beam in front of the actively collimated detector previously used and the assembly was flown as a narrow-angle device. (stratocat.com.ar)
The exponential absorption holds only for a narrow beam of gamma rays. (wikidoc.org)
If a wide beam of gamma rays passes through a thick slab of concrete, the scattering from the sides reduces the absorption. (wikidoc.org)
In-beam gamma rays were measured using the JUROGAM detector array. (lu.se)
x rayed will be exposed to the x ray beam. (cdc.gov)

To identify the detector sector where the interaction took place we have to observe the net charge on the charge-collecting electrode simply observing the polarity of the induced signal. (wikipedia.org)
Next, we develop methods for calibrating the response statistics of a thick-detector gamma camera as a function of interaction depth. (arizona.edu)
Astronomers have found that the universe contains a uniform background of gamma radiation, which has been attributed to the interaction of cosmic rays with interstellar gas. (newworldencyclopedia.org)
Such a background would be expected from the interaction of cosmic rays with interstellar gas. (newworldencyclopedia.org)

The pre-amplified detector signal is digitized with 14-bit resolution with a speed of 100 Ms/s. (wikipedia.org)
Gamma-ray detectors fabricated from gettered material show high resolution characteristics. (ansto.gov.au)
Ultrahigh-resolution imaging gamma-ray detectors. (arizona.edu)

The development of new perovskite materials and their application as X-ray and gamma ray sensors. (surrey.ac.uk)
The security market uses imaging detectors for portal scanners, eg to interrogate persons or vehicles in the search for illicit nuclear materials. (surrey.ac.uk)
In this project you will develop prototype perovskite scintillator imaging detectors fabricated from perovskite materials synthesised in the group. (surrey.ac.uk)
The research will characterise the fundamental optical properties of these new materials and demonstrate their performance in prototype X-ray and gamma-ray imaging detectors. (surrey.ac.uk)
Furthermore, the cleanliness procedures applied to remove or mitigate surface contamination of detector materials are described. (springer.com)
Still other radioactive materials are made by x rays, and gamma rays. (cdc.gov)

Shielding gamma rays requires large amounts of mass. (wikidoc.org)

Passivated areas: 1.0 mm at the back of the detector, 0.6 mm around the coaxial hole. (wikipedia.org)
Effect of prolonged annealing on the performance of coaxial Ge gamma-ray detectors. (lancs.ac.uk)

The XENONnT detector was constructed for the direct detection of weakly interacting massive particles (WIMPs) [ 1 ], a widely discussed dark matter candidate. (springer.com)

Postbaccalaureate researcher Isabella Brewer is a member of the team creating a next-generation gamma-ray detector called AstroPix. (worldpeoplenews.com)

Fermi also uses silicon-based detectors, but its sensors are comprised of silicon strips that are assembled in layers. (worldpeoplenews.com)
New technologies for digital X-ray sensors are currently revolutionising many aspects of public health and security, from medical imaging systems to the latest "3D" X-ray scanning technology used in airports. (surrey.ac.uk)

A dedicated material surface treatment procedure in combination with cleanroom facilities optimized for storage and detector assembly were developed in order to mitigate radioactive surface contamination. (springer.com)
Airborne contamination at these areas consists of both gamma radiation and Rn-222. (cdc.gov)

The amount, or intensity, of gamma rays depends on the type of radioactive material at the site, its concentration and depth from the surface, and physical distribution in the soil. (cdc.gov)
It includes particles and rays given off by radioactive material, stars, and high-voltage equipment. (cdc.gov)
Ionizing radiation is any one of several types of particles and change them into radioactive material (such as tritium and and rays given off by radioactive material, high-voltage equip- carbon 14). (cdc.gov)

We performed gamma-ray analysis to determine the amount of radioactive cesium-134 ( 134 Cs) and cesium-137 ( 137 Cs) in 259 foodstuffs five years after the Fukushima nuclear accident of 2011. (nature.com)

In addition to image quality advantages conferred by goingdigital, Digirad's detectors will be lighter and less bulky thanconventional detectors, according to Conwell. (diagnosticimaging.com)

X-rays or gamma rays are often used to quantify BMD. (medscape.com)

In this paper, we report the advantage of CdTe thin detectors and the performance of CdTe stacked detectors made of ten layers of a 0.5 mm thick CdTe diode detectors with a surface area of 21.5 mm × 21.5 mm. (elsevierpure.com)
The original gamma-ray detector was composed by a 4 inch-diameter by 2-inch-thick NaI(Tl) crystal viewed by an RCA 8054 phototube. (stratocat.com.ar)

They have also found gamma rays originating from solar flares. (newworldencyclopedia.org)
The first true astrophysical gamma-ray sources detected were solar flares, which revealed the strong 2.223 MeV line predicted by Morrison. (newworldencyclopedia.org)
These first gamma-ray line observations were from the spacecrafts OSO-3, OSO-7, and the Solar Maximum Mission, the last of which was launched in 1980. (newworldencyclopedia.org)

The DMPK102-Analyser is a miniature USB-based multichannel analyzer, which requires an external amplifier and high voltage supply for the detector. (dmphotonics.com)

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