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Study of discrete symmetry in 21Ne
Get PDFSince their first conceptualization in the work of J.A. Wheeler, nucleons clusters havebeen invistigated thoroughly. In recent years, R. Bijker, F. Iachello and V. Della Rocca usedthe Cluster Shell-Model framework to describe light nuclei seen as kα-particles disposedon a specific lattice plusnnucleons. The objective of this thesis is to extend for the first timetheir approach to the case of21Ne. The geometrical model describing the nucleus and itsintrinsic symmetry are presented, followed by a brief excursus on numerical calculations.In addition, single-particle states in the resulting cluster field are investigated. Moreover, amethodology towards the optimization of the parameters describing the model, the resultsobtained, and the corresponding level scheme are presented and described. In conclusionthe cluster shell-model level scheme and the experimental one are compared
Study of beam-gas interaction at the LHC for the Physics Beyond Collider Fixed-Target study
Get PDFAmong several working groups formed in the framework of Physics Beyond Colliders study, launched at CERN in September 2016, there is one investigating some specific fixed-target experiment proposals. Of particular interest is the study of high-density unpolarized or polarized gas target to be installed upstream the LHCb detector using storage cells located around the beam to enhance the target density. This work studies the impact of the interactions of 7 TeV proton beams with such gas targets on the LHC machine in terms of particle losses. The overall compatibility with the planned high-intensity program of the LHC is also discussed. A calculation is also performed of the minimum acceptable radius for such a storage cell in order to ensure safe operational conditions
La farmacia come punto di riferimento per la salute ed il benessere delle persone Il caso Farmacie Specializzate del Gruppo Unifarco
No full textLe Tecnologie Immersive come strumento di formazione: Realtà Virtuale e Realtà Aumentata per la pratica del Public Speaking
Get PDFA conjecture on Fermi-Pasta-Ulam and Toda models
Get PDFIn this thesis we will solve a conjecture on Fermi-Pasta-Ulam and Toda chains written in the continuum limit N to infinity: this says that every first integral of the Toda chain admits an extension to the 4th order in the perturbative parameter h that is an approximated first integral of FPU
Fattorizzazione non unica nell'anello dei polinomi a valori interi
Get PDFL'argomento centrale della tesi e' lo studio dell'anello dei polinomi a valori interi, in particolare di fenomini legati al fatto che quest'anello non e' UFD. Nella prima parte invece, viene mostrato l'importante ruolo degli elementi assolutamente irriducibili nella fattorizzazione negli anelli degli interi di campi di numer
Some problems of unlikely intersections
Get PDFFixing X in the multiplicative algebraic group G^n_m(\Q), we are interested in the intersection of X with the union of Y where Y runs through the algebraic subgroups of G^n_m restricted only by dimension. We shall prove that, if X is an irreducible subvariety in G^n_m and the considered algebraic subgroups have codimension at least dim X, then this intersection has a bounded height by removing the anomalous sub varieties of X. Furthermore, we recover the finiteness by considering the algebraic subgroups of codimension at least 1 + dim X
Problemi recenti per la costante di Hubble
Get PDFLa tesi discute alcune problematiche relative a diverse misure indipendenti della costante
di Hubble, basate principalmente su osservazioni degli indicatori di distanza locali con
evidenze osservative dalle anisotropie della CMB.
Alcune nuove risultanze da osservazioni dei Baryon Acustic Oscillations sono incluse.
Conclude breve discussione si possibili soluzioni
Density of integral points on varieties: Mordell orbifold conjecture and special varieties
Get PDFThe objective of this thesis is to understand F. Campana's conjectures about density of integral points on varieties defined over a number field. They aim to characterize potential density and mordellicity. Moreover, F. Campana was able to construct a fibration that conjecturally splits the potentially dense and the mordellic parts of any variety