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Wyszukujesz frazę "Gerber, E." wg kryterium: Autor


Wyświetlanie 1-2 z 2
Tytuł:
Positronium for antihydrogen production in the AEGIS experiment
Autorzy:
Consolati, G.
Aghion, S.
Amsler, C.
Bonomi, G.
Brusa, R.
Caccia, M.
Caravita, R.
Castelli, F.
Cerchiari, G.
Comparat, D.
Demetrio, A.
Di Noto, L.
Doser, M.
Evans, C.
Fanì, M.
Ferragut, R.
Fesel, J.
Fontana, A.
Gerber, S.
Giammarchi, M.
Gligorova, A.
Guatieri, F.
Haider, S.
Hinterberger, A.
Holmestad, H.
Kellerbauer, A.
Khalidova, O.
Krasnicky, D.
Lagomarsino, V.
Lansonneur, P.
Lebrun, P.
Malbrunot, C.
Mariazzi, S.
Marton, J.
Matveev, V.
Mazzotta, Z.
Müller, S.
Nebbia, G.
Nedelec, P.
Oberthaler, M.
Pacifico, N.
Pagano, D.
Penasa, L.
Petracek, V.
Prelz, F.
Prevedelli, M.
Ravelli, L.
Rienaecker, B.
Robert, J.
Røhne, O.
Rotondi, A.
Sandaker, H.
Santoro, R.
Smestad, L.
Sorrentino, F.
Testera, G.
Tietje, I.
Widmann, E.
Yzombard, P.
Zimmer, C.
Zmeskal, J.
Zurlo, N.
Powiązania:
https://bibliotekanauki.pl/articles/1057954.pdf
Data publikacji:
2017-11
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
04.80.Cc
07.77.-n
36.10.Dr
78.70.Bj
Opis:
The primary goal of the Antihydrogen Experiment: Gravity, Interferometry, Spectroscopy (AEGIS) collaboration is to measure for the first time precisely the gravitational acceleration of antihydrogen, H̅, a fundamental issue of contemporary physics, using a beam of antiatoms. Indeed, although indirect arguments have been raised against a different acceleration of antimatter with respect to matter, nevertheless some attempts to formulate quantum theories of gravity, or to unify gravity with the other forces, consider the possibility of a non-identical gravitational interaction between matter and antimatter. We plan to generate H̅ through a charge-exchange reaction between excited Ps and antiprotons coming from the Antiproton Decelerator facility at CERN. It offers the advantage to produce sufficiently cold antihydrogen to make feasible a measurement of gravitational acceleration with reasonable uncertainty (of the order of a few percent). Since the cross-section of the above reaction increases with n⁴, n being the principal quantum number of Ps, it is essential to generate Ps in a highly excited (Rydberg) state. This will occur by means of two laser excitations of Ps emitted from a nanoporous silica target: a first UV laser (at 205 nm) will bring Ps from the ground to the n=3 state; a second laser pulse (tunable in the range 1650-1700 nm) will further excite Ps to the Rydberg state.
Źródło:
Acta Physica Polonica A; 2017, 132, 5; 1443-1449
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Taxonomic relationships and population differentiation of the south-western Eurasian Zelkova species inferred in leaf morphology
Autorzy:
Jasinska, A.K.
Rucinska, B.
Kozlowski, G.
Fazan, L.
Garfi, G.
Pasta, S.
Bétrisey, S.
Gerber, E.
Boratynska, K.
Boratynski, A.
Powiązania:
https://bibliotekanauki.pl/articles/2078267.pdf
Data publikacji:
2021
Wydawca:
Polska Akademia Nauk. Instytut Dendrologii PAN
Tematy:
biogeography
plant variation
relict trees
systematics
taxonomy
Ulmaceae
Opis:
The relict tree species Zelkova abelicea and Z. sicula (Ulmaceae) occur in Crete and Sicily, respec- tively. Zelkova abelicea grows in approximately 40 localities in the mountains of Crete, while Z. sicula has been found in only two stands in Sicily. We compared 25 morphological characters of the leaves of both species and used statistical methods (Tuk- ey’s test, discrimination analysis, principal component analysis, agglomeration) to reveal the differences between these two species, their relation to Z. carpinifolia (the third Zelkova south-west Eurasian species), and between the leaves from different shoot types. Our study represents the first comparative biometric analysis of the three Zelkova species localized in the western edge of the current geographic range of the genus. We found that the species differed from each other both, in terms of leaf form characters and level of leaf variation. Zelkova carpinifolia was clearly differ- ent from Z. abelicea, while the two populations of Z. sicula, SIB and SIA, were more similar to Z. carpinifolia and Z. abelicea, respectively. The latter finding supports the results of recent molecular studies suggesting the hybrid origin of Z. sicula. Zelkova abelicea, Z. sicula and Z. carpinifolia differ each other in the leaf characteristics and level of phenotypic variation.
Źródło:
Dendrobiology; 2021, 85; 60-77
1641-1307
Pojawia się w:
Dendrobiology
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-2 z 2

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