نتایج جستجو برای: gamma ray spectrometer
تعداد نتایج: 424287 فیلتر نتایج به سال:
We present the first Suzaku observation of the new Soft Gamma Repeater SGR0501+4516, performed on 2008 August 26, four days after the onset of bursting activity of this new member of the magnetar family. The soft X-ray persistent emission was detected with the X-ray Imaging Spectrometer (XIS) at a 0.5–10 keV flux of 3.8 × 10 erg scm, with a spectrum well fitted by an absorbed blackbody plus pow...
The laboratory for instrumental neutron activation analysis at the Reactor Institute Delft, Delft University of Technology uses a network of 3 gamma-ray spectrometers with well-type detectors and 2 gamma-ray spectrometers with coaxial detectors, all equipped with modern sample changers, as well as 2 spectrometers with coaxial detectors at the two fast rabbit systems. A wide variety of samples i...
Fine-scale spatial information on soil properties is needed to successfully implement precision agriculture. Proximal gamma-ray spectroscopy has recently emerged as a promising tool to collect fine-scale soil information. The objective of this study was to evaluate a proximal gamma-ray spectrometer to predict several soil properties using energy-windows and full-spectrum analysis methods in two...
We present multiwavelength observations of the BL Lacertae object Markarian 501 (Mrk 501) in 1997 between April 8 and April 19. Evidence of correlated variability is seen in very high energy (VHE; E * 350 GeV) gray observations taken with the Whipple Observatory g-ray telescope, data from the Oriented Scintillation Spectrometer Experiment of the Compton Gamma Ray Observatory, and quick-look res...
As part of our multiwavelength campaign of GX 339[4 observations in 1996, we present our radio, X-ray, and gamma-ray observations made in July, when the source was in a hard state (\soft X-ray low state). The radio observations were made at the time when there was a possible radio jet. We show that the radio spectrum was Ñat and signiÐcantly variable and that the radio spectral shape and amplit...
gamma-rays emitted from the ground surface relate to the primary mineralogy and geochemistryof the bedrock, and the secondary weathered materials. this information can contribute significantly to anunderstanding of the geochemical and pedogenetic history of a region. the main aim of this paper was to study the relationship between ground gamma-ray data and basement geochemistry in the lese catc...
this research was conducted to determine the effect of gamma ray (gr) (100 and 150 kgy), sodium hydroxide (50 g/kg dm) and calcium oxide (160 g/kg dm) on gas production parameters and in vitro digestibility of soybean straw. all treatments, except for the gamma ray (100 and 150 kgy) did not have gas production up to 4 hours after incubation and there was a lag time. from 8 to 96 hours of incuba...
The AMS spectrometer will be implemented on the International Space Station at the end of 2003 (or beginning of 2004). The instrument will be made of a superconducting magnet which inner volume will be mapped with a tracker consisting of 8 planes of silicon microstrips surrounded by several sub-detectors: a time-of-flight (TOF), a ring imaging Cherenkov (RICH), an electromagnetic calorimeter (E...
The $\beta$-decay of neutron-rich $^{129}$In into $^{129}$Sn was studied using the GRIFFIN spectrometer at ISAC facility TRIUMF. study observed half-lives ground state and each $\beta$-decaying isomers. level scheme has been expanded with thirty-one new $\gamma$-ray transitions nine excited levels, leading to a re-evaluation $\beta$-branching ratios spin assignments. observation (29/2$^{+}$) 19...
natural radionuclides present in soil as well as certain anthropogenic radionuclides released to the environment are the major contributors to terrestrial outdoor exposures. in the assessment of human exposures from environmental radioactivity, besides the conventional method of soil and vegetation sampling combined with laboratory based analyses of environmental media, the other choice would b...
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