gam′ma ray` n. 1.a highly penetrating photon of high frequency, usu. 1019Hz or more, emitted by an atomic nucleus. 2.a stream of such photons. [1900–05] Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, In...
Power spectra of Gamma-Ray Burst(GRB) were investigated in the frequency range 0.01 - 500 Hz using BATSE data. Significant variability was found on the scale up to 100 Hz. We found that high frequency part (5 - 100 Hz) of averaged power spectrum is approximated by power law with power ...
3), leading to patterned firing in the gamma frequency range (~ 25 ms ISI), both for mPFC and Reu cells. Of notable interest was the decreased spiking probability at the ~ 17 ms mark which is suggestive of either GABAA-mediated inhibition or refractory periods, as predicted by ...
We report the detection of very high-energy gamma-ray emission from the intermediate-frequency-peaked BL Lacertae object W Comae (z=0.102) by VERITAS. The source was observed between January and April 2008. A strong outburst of gamma-ray emission was measured in the middle of March, lasting...
High-frequency (e.g., gamma 30 to 50 Hz) coherent neural activity has been postulated to underlie binding of independent neural assemblies and thus integra... KJ Meador,PG Ray,JR Echauz,... - 《Neurology》 被引量: 286发表: 1999年 Gamma (40-100 Hz) oscillation in the hippocampus of ...
Terrestrial gamma ray flashes (TGFs) are a class of enigmatic electrical discharges in the Earth's atmosphere. In this study, we analyze an unprecedentedly large dataset comprised of 2188 TGFs whose signatures were simultaneously measured using space- and ground-based detectors over a five-year ...
Durations of gamma-ray bursts (GRB's) are featured by >2s subset and <2s one, with initial corresponding energy ratio being 20:1. It is found that supernova remants(SNR's) turnover frequencies peak at 100 and 500 MHz. After assuming that GRB's originate from hypernova and making an ...
“Work on this important catalog has been going on in our group for years,” said Paul Ray, Ph.D., head of the High Energy Astrophysics and Applications Section at NRL. “Our scientists and postdocs have been able to both discover and analyze the timing behavior and spectra of many of ...
The frequency range for the analysis was 30–100 Hz (excluding the notch filter interval of 45–55 Hz), in accordance with a previous study [13, 14]. M. Tada et al. Statistical analyses For ITC analyses, a repeated-measures ANOVA was performed with time (0–100 and 300–400 ms) as...
γ-ray is an electromagnetic radiation with extremely high frequency and high photon energy. As a promising radiation source, it has a broad range of applications in material science, nuclear physics, antimatter physics1–3, logistics for providing shipment security, medicine4 for sterilizing medical...