98058986
Measurement of the neutron induced fission cross section on transuranic (TRU) elements at the n_TOF facility at CERN
During the 2004 campaign, the n_TOF collaboration measured neutron fission cross sections for ^{233}U, ^{241,243}Am, ^{245}Cm, as well as the fission standards ^{235,238}U, using a sealed Fission Ionization Chamber (FIC). The setup included a total of 16 targets and 18 electrodes mounted together in a 50-cm length chamber, allowing the measurements of all isotopes at the same time, thus in the same experimental conditions. A brief description of the facility and of the detector setup will be presented followed by the preliminary results of the analysis of ^{235}U, ^{233}U, and ^{245}Cm from thermal energies up to some tenths of MeV.
39693462
Alpha-particle scattering and isoscalar giant resonances in the SU(3) model.
Giant isoscalar monopole and quadrupole resonances are introduced into the SU(3) limit of the interacting boson model by means of {ital S} and {ital D} bosons simulating collective particle-hole excitations, in addition to the usual {ital s} and {ital d} bosons, representing either collective particle or hole pairs in the valence shell. The evaluated giant resonance energies, as well as the matrix elements of {ital E}0 and {ital E}2 transitions from the giant resonance levels to the 0{sub 1}{sup +-}2{sub 1}{sup +-}4{sub 1}{sup +} members of the ground-state band, are utilized in coupled-channel calculations of giant resonance excitation through inelastic alpha scattering by the transitional isotopes {sup 148}Sm and {sup 154}Sm: the calculated differential cross sections are then compared with experimental data.
7587691
Isospin splitting of the giant dipole resonance in the s-d shell and the interacting boson model.
A phenomenological algebraic approach to nuclear isovector excitations is discussed within the framework of the interacting boson model. Analytic formulae are obtained for isospin splittings and excitation strengths of the giant dipole resonance in deformed nuclei. An application of the formalism to /sup 26/Mg is presented, where both schematic and realistic calculations have been performed.
29475570
Photon scattering by gamma -soft nuclei.
Calculations of elastic and inelastic photon scattering at energies around the giant dipole resonance are carried out for osmium isotopes in the SU(3)..-->..O(6) transitional region of the interacting boson model. /sup 186/Os shows features of a prolate nucleus, /sup 188en-dash192/Os that of ..gamma..-soft nuclei.
45106921
Proton scattering and the interacting boson model in the s-d shell.
The scattering cross sections of 29.4 MeV protons to the first five levels of the /sup 32/S and of 40 MeV protons to the first seven levels of /sup 24/Mg, have been analyzed. The calculations have been performed with a coupled-channel program using nuclear matrix elements obtained within the IBM approximation including g-boson configurations.
1115406
Spin formalism in the algebraic scattering theory for heavy ions.
We develop a simple method of treating spin effects in the frame of algebraic scattering theory and apply it to the system {sup 16}O+{sup 65}Cu at {ital E}{sub c.m.}=44.77 MeV.
53139097
Implementation and performance of the ATLAS trigger muon "vertical slice"
The ATLAS (A Toroidal LHC ApparatuS) trigger system is designed to keep high effiency for interesting events while achieving a rejection of low transverse momentum ( p T ) physics of about 10 7 , thus reaching the ∼200 Hz data storage capability of the Data Aquisition system. A three levels structure has been implemented for this purpose, as described in this work for the case of the muon trigger system. After describing the implementation, some performance results are presented in terms of final trigger rates, resolutions, efficiencies, background rejection and algorithm latency.
122706822
Neutralino spin measurement with ATLAS
One of the goals of the ATLAS experiment at the LHC is to search for evidence of Supersymmetry (SUSY) signals and to measure, if discovered, the main properties of the new particles, like the spin. Left-handed squark cascade decay to second lightest neutralino (~ 0 ) which further decays to slepton represents a good opportunity for SUSY particles’ spin measurement. The observability of charge asymmetries in invariant mass distributions of some final products is investigated to prove that neutralino spin is 1/2. The criteria used to select signal events and to reject background are described, together with the applied cut efficiencies. Results on charge asymmetry are then shown and discussed.
17810666
ATLAS RPC Cosmic Ray Teststand at INFN Lecce
We describe the design and functionality of the cosmic ray teststand built at 
INFN Lecce for ATLAS RPC quality control assurance.
22148204
Implementation and performance of the third level muon trigger of the ATLAS experiment at LHC
The trigger system of the ATLAS experiment at the LHC aims at a high selectivity in order to keep the full physics potential while reducing the 40 MHz initial event rate imposed by the LHC bunch crossing down to /spl sim/100 Hz, as required by the data acquisition system. Algorithms working in the final stage of the trigger environment (Event Filter) are implemented to run both in a "wrapped" mode (reconstructing tracks in the entire Muon Spectrometer) and in a "seeded" mode (according to a dedicated strategy that performs pattern recognition only in regions of the detector where trigger hypotheses have been produced at earlier stages). The working principles of the offline muon reconstruction and identification algorithms (MOORE and MuId) implemented and used in the framework of the Event Filter are discussed in this paper. The reconstruction performance of these algorithms is presented for both modes in terms of efficiency, momentum resolution, rejection power and execution times on several samples of simulated single muon events, also taking into account the high background environment expected for ATLAS.
116941153
Beyond Standard Model and Exotics: Experimental overview