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We have observed an area of approximatley 27 deg^2 to an rms noise level of less than 0.2 mJy at 15.7 GHz, using the Arcminute Microkelvin Imager Large Array. These observations constitute the most sensitive radio-source survey of any…

Radon is the main background source of dark matter and neutrino experiments. Radon concentration ($\rm mBq/m^3$) measurement by liquid scintillation detector is a highly sensitive method at low temperatures using silicon photomultipliers…

仪器与探测器 · 物理学 2022-11-23 C. Zhong , F. J. Luo , B. Zheng , X. D. Wang , M. Y. Bu , J. Zou , M. N. Deng

We present the first results of an observational programme undertaken to map the fine structure line emission of singly ionized carbon ([CII] 157.7409 micron) over extended regions using a Fabry Perot spectrometer newly installed at the…

天体物理学 · 物理学 2009-11-07 B. Mookerjea , S. K. Ghosh , H. Kaneda , T. Nakagawa , D. K. Ojha , T. N. Rengarajan , H. Shibai , R. P. Verma

The Radio Ammonia Mid-Plane Survey (RAMPS) is a molecular line survey that aims to map a portion of the Galactic midplane in the first quadrant of the Galaxy (l = 10 deg - 40 deg, |b| < 0.4 deg) using the Green Bank Telescope. We present…

Biocompatible nanoscale probes for sensitive detection of paramagnetic species and molecules associated with their (bio)chemical transformations would provide a desirable tool for a better understanding of cellular redox processes. Here, we…

Ammonia (NH$_3$) toxicity, stemming from nitrification, can adversely affect aquatic life and influence the taste and odor of drinking water. This underscores the necessity for highly responsive and accurate sensors to continuously monitor…

介观与纳米尺度物理 · 物理学 2023-12-04 Apostolos Apostolakis , Guillaume Aoust , Grégory Maisons , Ludovic Laurent , Mauro Fernandes Pereira

Compact X-rays detectors made of 1/2" or 1" :LaBr3:Ce crystals of cubic shape with SiPM array readout have been developed for the FAMU experiment at RIKEN-RAL. The aim is a precise measurement of the proton Zemach radius with incoming…

仪器与探测器 · 物理学 2022-11-10 M. Bonesini , R. Benocci , R. Bertoni , A. Menegolli , M. Prata , M. Rossella , R. Rossini

It is shown that 21 cm intensity mapping could be used in the near term to make cosmologically useful measurements. Large scale structure could be detected using existing radio telescopes, or using prototypes for dedicated redshift survey…

宇宙学与河外天体物理 · 物理学 2010-10-13 Kiyoshi Wesley Masui , Patrick McDonald , Ue-Li Pen

New local ultrametricity measures for finite metric data are proposed through the viewpoint that their Vietoris-Rips corners are samples from p-adic Mumford curves endowed with a Radon measure coming from a regular differential 1-form. This…

信息检索 · 计算机科学 2024-08-15 Patrick Erik Bradley

With 2.5x the previously reported exposure, the Daya Bay experiment has improved the measurement of the neutrino mixing parameter sin^2(2theta_13) = 0.089+-0.010(stat)+-0.005(syst). Reactor anti-neutrinos were produced by six 2.9 GW(th)…

高能物理 - 实验 · 物理学 2019-08-13 Daniel A. Dwyer

The Jiangmen Underground Neutrino Observatory (JUNO), a 20~kton multi-purpose low background Liquid Scintillator (LS) detector, was proposed primarily to determine the neutrino mass ordering. To suppress the radioactivity from the…

仪器与探测器 · 物理学 2024-02-22 C. Li , B. Wang , Y. Liu , C. Guo , Y. P. Zhang , J. C. Liu , Q. Tang , T. Y. Guan , C. G. Yang

Using the Submillimeter Array, we have made the first high angular resolution measurements of the linear polarization of Sagittarius A* at submillimeter wavelengths, and the first detection of intra-day variability in its linear…

天体物理学 · 物理学 2009-11-13 D. P. Marrone , J. M. Moran , J. -H. Zhao , R. Rao

In this work, radioactivity investigations of soil samples from neutral and agricultural sites in Punjab/India have been carried out to study the impact of land use patterns. The analysis of radiological, mineralogical, physicochemical, and…

Cadmium has been used historically as an important component of integral experiments because of its high thermal neutron absorption cross section. Correct interpretation of such experiments depends on accurate differential neutron cross…

核实验 · 物理学 2018-01-11 G. Leinweber , D. P. Barry , R. C. Block , J. A. Burke , K. E. Remley , M. J. Rapp , Y. Danon

Currently, radiobiology experiments using heavy ions at GANIL(Grand Accelerateur National d Ions Lourds) are conducted under the supervision of the CIMAP (Center for research on Ions, MAterials and Photonics). In this context, a new beam…

In this paper, we propose a method for estimating radial distribution grid admittance matrix using a limited number of measurement devices. Neither synchronized three-phase measurements nor phasor measurements are required. After making…

系统与控制 · 计算机科学 2019-02-21 Xia Miao , Xiaofan Wu , Ulrich Munz , Marija Ilic

The interest in using the radiation detectors based on high resistive chromium-compensated GaAs (GaAs:Cr) in high energy physics and others applied fields has been growing steadily due to its numerous advantages over others classical…

Full-scale experimental measurements and numerical predictions of the wave-elevation topology behind a transom-sterned vessel, the R/V Athena I, are compared and assessed in this paper. The mean height, surface roughness (RMS), and spectra…

The natural radionuclide (Ra^222, Th^232, and 40K) contents were determined for seven locations over the whole Wadi Arar at north of Saudi Arabia, using gamma-spectrometry analysis. The range of activity concentrations of Ra^226, Th^232,…

地球物理 · 物理学 2018-07-27 Mohammed A. M. Alghamdi

Polarized synchrotron emission at meter to centimeter wavelengths provides an effective tracer of the Galactic magnetic field. Calculating Faraday depth, the most useful parameter for mapping the line-of-sight magnetic field, requires…