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Gamma Ray - Springer Nature

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Last Updated: 03 October 2022

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On the Study of Spatial Variability of the Composition of the Substance of Mars in Experiments on Gamma-Ray Spectroscopy on Board the Mobile Vehicle using the Method of “Tagged Charged Particles”

Abstract Methods are used for investigating the variability in space of the surface of Mars's substance composition in experiments on gamma-ray spectroscopy on board a mobile vehicle. u201d Mars rover u201d, U201cMars rover U201d's u201d. According to the APXS experiment, the method of determining the chemical composition of the substance in the test volume with the known forms of Martian regolith is also discussed.

Source link: https://doi.org/10.1134/S0038094622050057


A wind environment and Lorentz factors of tens explain gamma-ray bursts X-ray plateau

The location of the plateau discovered in the early X-ray light curves of gamma ray bursts is debated. Here, the researchers demonstrate that the observed plateau can be explained within the classical GRB model by considering a larger shell with a small tens increase. Here, we show that this observed signal is naturally obtained within the classical GRB fireball model, provided that the initial Lorentz factor is small enough to warrant any further alterations, and that it occurs as a medium-low density wind. The range of Lorentz factors in GRB jets is now much larger than previously expected, and bridges an observational gap between mildly relativistic jets conceived in active galactic nuclei to more compact jets built in few extreme GRBs. In addition, long-Grow progenitors are either not Wolf-Rayet actors, or the wind characteristics during the final stellar evolution phase are different than those from earlier generations.

Source link: https://doi.org/10.1038/s41467-022-32881-1


Gamma ray detection performance of newly developed MAPD-3NM-II photosensor with LaBr_3(Ce) crystal

With LaBr_3 LaBr 3 scintillator, this paper discusses the gamma-ray detection results of the newly developed MAPD-3NM-II type SiPM sensor array. The latest MAPD-3NM-II demonstrated good energy stability and linearity in the measured energy region, according to the published results. The energy resolution of the latest detector based on MAPD-3NM-III was superior than any previous MAPD products.

Source link: https://doi.org/10.1038/s41598-022-20006-z


Gamma-Ray Spectroscopy for $$^{237}$$ 237 Np Using a Transition-Edge Sensor with a Thick-Trilayer Membrane

The transition edge sensors are being used intensively not only to determine isotopic composition of nuclear samples but also to analyze transuranic radionuclides inside the human body. The gamma-ray TES with the thick-trilayer membrane is used in this paper to perform the spectroscopy for the nuclear radiation source. According to our experiments, a large number of pixel formats would reduce the statistical uncertainty in less measuring time.

Source link: https://doi.org/10.1007/s10909-022-02867-w


Modeling the late-time merger ejecta emission in short gamma ray bursts

The resulting of the combination of binary compact objects' fusion have resulted in the creation of short gamma ray bursts. The long-hypothesized link between GWs and short GRBs has been established beyond doubt, with simultaneous detection of gravitational wave signals from GW 170817 and GRB 170817A. Fraction of the rotational energy transferred to the emerging ejecta results in late-time synchrotron radio emission due to the interaction with the ambient medium in the case of a magnetized central engine. We model the model light curves using the standard magnetar model with the relativistic correction.

Source link: https://doi.org/10.1007/s12036-022-09860-5


Effect of gamma rays on sensitive prepared dyed gels as radiation dosimeters

Since it is used in low-dose dosimetry, gel dosimetry is the most sensitive dosimeter. Three gels dosimetric structures made entirely of gelatin were examined using a UV spectrophotometer, using only thiazolyl blue tetrazolium bromide, ethyl violet, and bromothymol blue dyes. This gel has a linearity up to 500 Gy.

Source link: https://doi.org/10.1007/s10967-022-08524-6


Gamma-ray emission from the Sagittarius dwarf spheroidal galaxy due to millisecond pulsars

In 1u2013100 GeV measurements obtained by the Large Area Telescope aboard the Fermi Gamma-Ray Space Telescope, the Fermi bubbles are giant, emitted by ray-emitting lobes emanating from the Milky Way's nucleus, demonstrating in a u2013100 GeV data. Substructure within the Fermi bubbles has been identified as a sign of collimated outflows from the Galaxy's supermassive black hole, according to previous work. Here we demonstrate that a large portion of the u03b3-ray emission associated with the brightest region of substructure u2014 is owing to the Sagittarius dwarf spheroidal galaxy, which we also trace to. The Solar System's large Milky Way satellite is seen through the Fermi bubbles. The Sagittarius dSph has no ongoing star formation as a tidally and ram-pressure stripped remnant, but we do know that the dwarf pulsar population in its dimly outlined image provides the u03b3-ray signal that our analysis associates with its stellar template.

Source link: https://doi.org/10.1038/s41550-022-01777-x


Assessment of radiometric hazards in the Southern Industrial Zone, Jeddah City, using car-borne gamma-ray spectrometry system

This research aims to investigate the distribution of radioactive elements in Jeddah City's Southern Industrial Zone as a way to identify radioactive hazards from both natural and artificial sources. These zones represent some geographical anomalies with a higher radiation dose rate than the safe limit of 1 mSv/y. According to them, the mean radiation dose in the three zones 1, 2, 1. 2, and 0. 44 mSv/y, respectively, is 0. 47, 0. 43, and 0. 44, respectively, with standard deviation of 0. 34, 0. 43, and 0. 44, respectively, although their ranges are 0. 1, 0. 12, 0. 08, and 0. 11 mSv/y. We were able to conclude that the effective doses measured in the three zones were more than 1 mSv/y, the global exposure level for radiation in the anomaly areas, but less than the occupational exposure threshold of 20 mSv/y.

Source link: https://doi.org/10.1007/s12517-022-10763-6

* Please keep in mind that all text is summarized by machine, we do not bear any responsibility, and you should always check original source before taking any actions

* Please keep in mind that all text is summarized by machine, we do not bear any responsibility, and you should always check original source before taking any actions