Search results for "Cesium"
showing 10 items of 79 documents
Nonlinear effects in optical pumping of a cold and slow atomic beam
2015
By photoionizing hyperfine (HF) levels of the Cs state $6{\phantom{\rule{0.16em}{0ex}}}^{2}{P}_{3/2}$ in a slow and cold atom beam, we find how their population depends on the excitation laser power. The long time (around $180\phantom{\rule{4pt}{0ex}}\ensuremath{\mu}\mathrm{s})$ spent by the slow atoms inside the resonant laser beam is large enough to enable exploration of a unique atom-light interaction regime heavily affected by time-dependent optical pumping. We demonstrate that, under such conditions, the onset of nonlinear effects in the population dynamics and optical pumping occurs at excitation laser intensities much smaller than the conventional respective saturation values. The ev…
CeSOX: An experimental test of the sterile neutrino hypothesis with Borexino
2017
International audience; The third phase of the Borexino experiment that’s referred to as SOX is devoted to test the hypothesis of the existence of one (or more) sterile neutrinos at a short baseline (~5–10m). The experimental measurement will be made with artificial sources namely with a 144Ce–144Pr antineutrino source at the first stage (CeSOX) and possibly with a 51Cr neutrino source at the second one. The fixed 144Ce–144Pr sample will be placed beneath the detector in a special pit and the initial activity will be about 100 – 150 kCi. The start of data taking is scheduled for April 2018. The article gives a short description of the preparation for the first stage and shows the expected s…
Interfacial role of Cesium in Prussian Blue Films
2015
The simultaneous measurement of current, mass, motional resistance and absorbance magnitudes allows the electrochemical cation insertion process to be explained during successive voltammograms around the Prussian Blue ⇄ Everitt's Salt system in CsCl aqueous acid solutions. Two different ways for the entrance of cesium to the porous structure of Prussian Blue have been observed. Firstly, Cs+ is spontaneously absorbed as CsCl into the interstitial cluster of water of the channels formed by the Fe(II)low spinCNFe(III)high spin structural units of the crystal. This chemical absorption involves a spontaneous substitution of inner water molecules of the interstitial water cluster. Finally, Cs+ …
Monte Carlo dosimetric study of the medium dose rate CSM40 source
2013
Abstract The 137Cs medium dose rate (MDR) CSM40 source model (Eckert & Ziegler BEBIG, Germany) is in clinical use but no dosimetric dataset has been published. This study aims to obtain dosimetric data for the CSM40 source for its use in clinical practice as required by the American Association of Physicists in Medicine (AAPM) and the European Society for Radiotherapy and Oncology (ESTRO). Penelope2008 and Geant4 Monte Carlo codes were used to characterize this source dosimetrically. It was located in an unbounded water phantom with composition and mass density as recommended by AAPM and ESTRO. Due to the low photon energies of 137Cs, absorbed dose was approximated by collisional kerma. Add…
Advances in Anodic Alumina Membranes-based fuel cell: CsH2PO4 pore-filler as proton conductor at room temperature
2009
Abstract Anodic alumina membranes (AAM) filled with cesium hydrogen phosphate proton conductor have been tested as inorganic composite electrolyte for hydrogen–oxygen thin film (≤50 μm) fuel cell (TFFC) working at low temperatures (25 °C), low humidity ( T gas = 25 °C) and low Pt loading (1 mg cm −2 ). Single module TFFC delivering a peak power of around 15–27 mW cm −2 , with open circuit voltage (OCV) of about 0.9 V and short circuit current density in the range 80–160 mA cm −2 have been fabricated. At variance with pure solid acid electrolytes showing reproducibility problems due to the scarce mechanical resistance, the presence of porous alumina support allowed to replicate similar fuel…
CCDC 246618: Experimental Crystal Structure Determination
2005
Related Article: B.Gruner, L.Mikulasek, J.Baca, I.Cisarova, V.Bohmer, C.Danila, M.M.Reinoso-Garcia, W.Verboom, D.N.Reinhoudt, A.Casnati, R.Ungaro|2005|Eur.J.Org.Chem.|2005|2022|doi:10.1002/ejoc.200400811
CCDC 658273: Experimental Crystal Structure Determination
2008
Related Article: K.Salorinne, M.Nissinen|2008|Tetrahedron|64|1798|doi:10.1016/j.tet.2007.11.103
CCDC 729739: Experimental Crystal Structure Determination
2013
Related Article: P.Farras,C.Vinas,R.Sillanpaa,M.Rey,F.Teixidor|2010|Dalton Trans.|39|7684|doi:10.1039/c0dt00433b
CCDC 227792: Experimental Crystal Structure Determination
2004
Related Article: I.Rojo, F.Teixidor, R.Kivekas, R.Sillanpaa, C.Vinas|2003|J.Am.Chem.Soc.|125|14720|doi:10.1021/ja037279e
CCDC 992680: Experimental Crystal Structure Determination
2014
Related Article: Francisco R. Fortea-Pérez, Nadia Marino, Donatella Armentano, Giovanni De Munno, Miguel Julve, Salah-Eddine Stiriba|2014|CrystEngComm|16|6971|doi:10.1039/C4CE00669K