Search results for "SB"
showing 10 items of 1841 documents
Mössbauer and magnetic studies of mixed-valence linear chain compounds: Na3Fe2S4 and Na3Fe2Se4
1986
Mossbauer and magnetic data establish the two compounds Na3Fe2X4(X=S, Se) as mixed-valence linear chain compounds with rapid valence fluctuation. The compounds exhibit 1-dimensional antiferromagnetic coupling within the chains, and below a critical temperature a 3-dimensional ferrimagnetic ordering between the chains.
Proton decay of 108I and its significance for the termination of the astrophysical rp-process
2019
Abstract Employing the Argonne Fragment Mass Analyzer and the implantation-decay-decay correlation technique, a weak 0.50(21)% proton decay branch was identified in 108I for the first time. The 108I proton-decay width is consistent with a hindered l = 2 emission, suggesting a d 5 2 origin. Using the extracted 108I proton-decay Q value of 597(13) keV, and the Q α values of the 108I and 107Te isotopes, a proton-decay Q value of 510(20) keV for 104Sb was deduced. Similarly to the 112,113Cs proton-emitter pair, the Q p ( I 108 ) value is lower than that for the less-exotic neighbor 109I, possibly due to enhanced proton-neutron interactions in N ≈ Z nuclei. In contrast, the present Q p ( Sb 104 …
Time-differential Mössbauer emission spectroscopy: Development of a new spectrometer and first results
1989
A spectrometer for time-differential Mossbauer spectroscopy was developed with a high count rate capability, a good time resolution, and a flexible data handling. Chemical and physical aftereffects following the57Co decay were studied within the cobalt doped systems Turnbulls blue and ZnS.
New time-differential Mössbauer emission measurements on the high-spin→low-spin relaxation in [57Co/Co(phen)3](ClO4)2
1990
Using our new spectrometer for time-differential Mossbauer emission spectroscopy we reinvestigated the high-spin→low-spin relaxation following the57Co(EC)57Fe process in [57Co/Co(phen)3](ClO4)2 (phen=1,10-phenanthroline). In contrast to former investigations we found a temperature dependent initial population less than 1 for the metastable high-spin states. The results and the data evaluation method are presented.
Study of very thin oxide layers by conversion and Auger electrons
1990
Oxidic layers as thin as 20–30 A on α-Fe and stainless steel are studied by57Fe-DCEMS with K-conversion electrons and ICEMS. No indication of a vanishingf-factor could be found. Mossbauer spectra, recorded by use of LMM-Auger electrons (AEMS) and by electrons emitted with energies below 15 eV (LEEMS), contain information on the surface layer as well as on the bulk material, showing that part of these electrons are due to secondary effects and the high escape depths of K-conversion electrons.
A mechanical picture of fractional-order Darcy equation
2015
Abstract In this paper the authors show that fractional-order force-flux relations are obtained considering the flux of a viscous fluid across an elastic porous media. Indeed the one-dimensional fluid mass transport in an unbounded porous media with power-law variation of geometrical and physical properties yields a fractional-order relation among the ingoing flux and the applied pressure to the control section. As a power-law decay of the physical properties from the control section is considered, then the flux is related to a Caputo fractional derivative of the pressure of order 0 ⩽ β ≤ 1 . If, instead, the physical properties of the media show a power-law increase from the control sectio…
Farocki e Fassbinder: l'eredità contrastata del Nuovo Cinema Tedesco
2014
Il saggio ripercorre alcune delle tappe fondamentali del cosiddetto nuovo cinema tedesco, rintracciandone le ragioni dell'origine e l'eridità
Kauna nozīme Martas Nusbaumas taisnīguma koncepcijā
2016
Darbā apskatīts kauna aspekts un nozīme Martas Nusbaumas taisnīguma teorijas ietvaros un salīdzināts ar citu autoru izpratni par kaunu, koncentrējoties galvenokārt 20. gs. otrās puses domātāju sarakstītajos materiālos un mūsdienu sabiedrības kontekstā. Kauns tiek skatīts dzimuma aspektā, tiek pētīts kauns bērnībā un Nusbaumas idejas par to, kādu lomu kauns var spēlēt sodīšanas nolūkos. Kauns tiek pētīts filozofijas un psiholoģijas ietvaros, apskatot kauna ikdienas dzīves nozīmi.
The effects of an abrupt increase in taxes on candy and soda in Norway: an observational study of retail sales
2020
Abstract Background Fiscal policies are used to promote a healthier diet; however, there is still a call for real-world evaluations of taxes on unhealthy foods and beverages. We aimed to evaluate the effect of an abrupt increase, of respectively 80 and 40%, in the excising Norwegian taxes on candy and beverages on volume sales of candy and soda. We expected sales to fall. Methods We analyzed electronic point of sale data covering approximately 98% of volume sales of grocery stores in Norway. In two pre-registered models with weekly (log-)sales of taxed candy and soda from 3884 individual stores, we modeled the difference between the jump (discontinuity) in the trend around the time of the i…
A CONFIGURAÇÃO INOVADORA DO PRINCÍPIO DA BOA ADMINISTRAÇÃO ENTRE PRIVADOS E AUTORIDADES PÚBLICAS NA UNIÃO EUROPÉIA
2017
O direito a uma boa administração pública é um dos direitos fundamentais da pessoa, garantido pelo artigo 41 da Carta dos direitos fundamentais da União Europeia, que, em 2009, por força do Tratado de Lisboa, tornou-se juridicamente vinculante com o mesmo valor de fonte primária dos Tratados europeus. Ele é definido como o direito de cada pessoa (física e jurídica) de receber, por parte da autoridade pública, em relação às questões que se lhe refiram, um tratamento imparcial, equitativo e num prazo razoável. Inclui, também, os seguintes direitos de natureza procedimental: a ser ouvida, antes de, a seu respeito, ser tomada qualquer medida individual que a afete desfavoravelmente; a ter acess…