نتایج جستجو برای: cesium atom

تعداد نتایج: 53496  

2014
Yoshihisa Namiki Toshihiko Ueyama Takayuki Yoshida Ryoei Watanabe Shigeo Koido Tamami Namiki

Decontamination of the radioactive cesium that is widely dispersed owing to a nuclear power station accident and concentrated in fly ash requires an effective elimination system. Radioactive fly ash contains large amounts of water-soluble cesium that can cause severe secondary contamination and represents a serious health risk, yet its complete removal is complicated and difficult. Here it is s...

2017
Takahito Ikenoue Hyoe Takata Masashi Kusakabe Natsumi Kudo Kazuyuki Hasegawa Takashi Ishimaru

After the Fukushima Daiichi Nuclear Power Plant accident in March 2011, concentrations of cesium isotopes (133Cs, 134Cs, and 137Cs) were measured in zooplankton collected in the Pacific off the east coast of Japan from May 2012 to February 2015. The time series of the data exhibited sporadic 137Cs concentration peaks in zooplankton. In addition, the atom ratio of 137Cs/133Cs in zooplankton was ...

2002
D. N. WANG S. HOVMOLLER M. SUNDBERG

A heavily distorted high resolution electron microscopy (HREM) image of a cesium-niobium oxide-fluoride sample wa reconstructed by crystallographic image processing (CIP). In the reconstructed image, showing 4bm symmetry, all metal atom were clearly seen with correct contrast, whereas in the original micrograph the fourfold symmetry was lost and only sore areas could be interpreted in terms of ...

Journal: :The Review of scientific instruments 2015
T Lévèque B Faure F X Esnault C Delaroche D Massonnet O Grosjean F Buffe P Torresi T Bomer A Pichon P Béraud J P Lelay S Thomin Ph Laurent

In this paper, we describe the design and the main performances of the PHARAO laser source flight model. PHARAO is a laser cooled cesium clock specially designed for operation in space and the laser source is one of the main sub-systems. The flight model presented in this work is the first remote-controlled laser system designed for spaceborne cold atom manipulation. The main challenges arise f...

Journal: :Physical review letters 2009
S G Porsev K Beloy A Derevianko

We carry out high-precision calculation of parity violation in a cesium atom, reducing theoretical uncertainty by a factor of 2 compared to previous evaluations. We combine previous measurements with calculations and extract the weak charge of the 133Cs nucleus, QW=-73.16(29)expt(20)theor. The result is in agreement with the standard model (SM) of elementary particles. This is the most accurate...

2000
T. E. Parker D. B. Sullivan

The mission and organization of the Time and Frequency Division of the National Institute of Standards and Technology (NIST) are reviewed and a discussion is presented of recent activities. Among the major recent milestones have been the development of cold-atom frequency standards, including the construction of a new cesium-fountain >equency standard and the design of a standard for operation ...

1997
Gi-Chol Cho Kaoru Hagiwara Seiji Matsumoto

We investigate the constraints on four-Fermi contact interactions from low-energy lepton-quark and lepton-lepton scattering experiments — polarization asymmetries in electron (muon)-nucleon scattering experiments, cesium and thallium atom parity violation measurements, neutrino-nuclei and neutrino-electron scattering experiments. These constraints are then combined by assuming the lepton and qu...

Journal: :تحقیقات نظام سلامت 0
مرجان فلاح دانشجوی کارشناسی ارشد، گروه مدیریت محیط زیست، دانشگاه آزاد اسلامی، واحد علوم و تحقیقات خوزستان، اهواز، ایران محمدرضا کاردان دکتری فیزیک هسته ای، پژوهشگاه علوم و فنون هسته ای سازمان انرژی اتمی ایران، تهران، ایران. سید محمد باقر نبوی دکتری مدیریت محیط زیست، دانشگاه علوم و فنون دریایی خرمشهر، خرمشهر، ایران. فروزان فرخیان دکتری مدیریت محیط زیست، دانشگاه آزاد اسلامی، واحد علوم و تحقیقات خوزستان، اهواز، ایران. حمید پور زمانی دانشجوی دکتری، مرکز تحقیقات محیط زیست، دانشگاه علوم پزشکی اصفهان، اصفهان، ایران. وحید سروی کارشناس ارشد، گروه خاک شناسی دانشکده کشاورزی، دانشگاه شهید چمران اهواز، اهواز، ایران.

background: due to the evacuation of some industrial wastewaters to arvandrood, the presence of the radionuclide material in the river is likely. the purpose of this study was to determine the radioactivity rate in arvandrood land area to the persian gulf. methods: : the concentration of cesium radionuclide (cs137) was measured in 20 sediment samples and 8 water samples which were collected fro...

2016
Sung-Chan Jang Sung-Min Kang Yuvaraj Haldorai Krishnan Giribabu Go-Woon Lee Young-Chul Lee Moon Seop Hyun Young-Kyu Han Changhyun Roh Yun Suk Huh

A novel microporous three-dimensional pomegranate-like micro-scavenger cage (P-MSC) composite has been synthesized by immobilization of iron phyllosilicates clay onto a Prussian blue (PB)/alginate matrix and tested for the removal of radioactive cesium from aqueous solution. Experimental results show that the adsorption capacity increases with increasing the inactive cesium concentration from 1...

2003
Nathan Lundblad David C. Aveline Robert J. Thompson James M. Kohel Jaime Ramirez-Serrano William M. Klipstein Daphna G. Enzer Nan Yu Lute Maleki

We generate a bright atomic beam containing laser-cooled rubidium and cesium, and we use this beam to load a mixed-species ultrahigh-vacuum (UHV) magneto-optical trap. We have characterized our two-species atomic beam over a range of operating conditions, and we obtain similar atom fluxes for each species. Within the UHV trap, interspecies inelastic collisions are observed in the form of enhanc...

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