Search results for "Time measurements"
showing 5 items of 5 documents
Collectivity along N=50: Nuclear Structure studies on the neutron-magic nuclei 92Mo and 94Ru with AGATA and VAMOS++
2019
El trabajo desarrollado en esta Tesis se centra en estudio experimental del comportamiento colectivo de los estados excitados de los núcleos semimágicos con N=50 en función de la ocupación del orbital g9/2 de protones, a través de la medida de la vida media de los estados "yrast" 4+ de los núcleos 92Mo y 94Ru. En particular, se ha investigado la conservación de "seniority" a lo largo de la capa g9/2 que es la primera capa donde podría no conservarse. El 100Sn, siendo el núcleo doblemente mágico ligado más pesado con igual número de protones y neutrones, ha atraído siempre un considerable interés desde el punto de vista experimental y teórico. La estructura de este núcleo y sus vecinos son e…
Transition probabilities in 31P and 31S : A test for isospin symmetry
2021
International audience; Excited states in the mirror nuclei 31P and 31S were populated in the 1p and 1n exit channels of the reaction 20Ne + 12C, at a beam energy of 33 MeV. The 20Ne beam was delivered for the first time by the Piave-Alpi accelerator of the Laboratori Nazionali di Legnaro. Angular correlations of coincident γ-rays and Doppler-shift attenuation lifetime measurements were performed using the multi-detector array GASP in conjunction with the EUCLIDES charged particle detector. In the observed B(E1) strengths, the isoscalar component, amounting to 24% of the isovector one, provides strong evidence for breaking of the isospin symmetry in the A=31 mass region. Self-consistent bey…
β decay studies of n-rich Cs isotopes with the ISOLDE Decay Station
2017
R. Lica et al. -- 14 pags., 7 figs., tab. -- Open Access funded by Creative Commons Atribution Licence 3.0
Pikosekunžu precizitātes laika intervālu mērīšanas un analīzes skaitlisko metožu izstrāde satelītu lāzerlokācijā pielietojumam
2002
Lāzerlokācijas metožu izmantošana zinātniskās programmās, kuras saistītas ar globālās ģeocentrisko koordinātu sistēmas definēšanu, Zemes rotācijas tekošo parametru noteikšanu, Zemes polu kustības mērījumiem, kontinentu dreifa noteikšanu, iespējamo zemestrīču prognozēšanu, prasa ļoti augstas precizitātes (0.5-2 cm) satelītu attālumu mērījumu rezultātus. Eksistējošie lāzeru tālmēri, daudzos gadījumos, nepilnīgi atbilst šīm prasībām, dodot precizitāti ap 4 cm. Risinot minētos lokācijas uzdevumus, liela loma ir laika intervālu analizatoru augstai izšķiršanas spējai. Satelītu lokācijā laika intervāla atsevišķa mērījuma vidējā kvadrātiskā kļūda nedrīkst pārsniegt dažus desmitus pikosekunžu, pie i…
A new approach for the measurement of gaseous elemental mercury (GEM) and H2S in air from anthropogenic and natural sources: Examples from Mt. Amiata…
2017
Real-time measurements of GEM and H2S discharged from natural and anthropogenic sources are a valuable tool to investigate the dispersion dynamics of these contaminants in air. In this study, a new approach to measure GEM and H2S concentrations in air, carried out by coupling a portable Zeeman atomic absorption spectrometer with high frequency modulation of light polarization (Lumex RA-915M) and a pulsed fluorescence gas analyzer (Thermo Scientific Model 450i), was applied to two distinct areas: (i) in the surroundings of Piancastagnaio (Siena, Central Italy), located in the eastern flanks of Mt. Amiata (a 200,000Â years old volcano), where three geothermal plants are operating and whose ex…