125063915
Experimental study of resonant states in P-27 via elastic scattering of Si-26 + p
15843852
Shape evolution in 116,118Ru: Triaxiality and transition between the O(6) and U(5) dynamical symmetries
P.-A. Söderström,1,* G. Lorusso,1 H. Watanabe,1,2 S. Nishimura,1 P. Doornenbal,1 G. Thiamova,3 F. Browne,1,4 G. Gey,1,3 H. S. Jung,5 T. Sumikama,6 J. Taprogge,1,7,8 Zs. Vajta,1,9 J. Wu,1,10 Z. Y. Xu,11 H. Baba,1 G. Benzoni,12 K. Y. Chae,13 F. C. L. Crespi,12,14 N. Fukuda,1 R. Gernhäuser,15 N. Inabe,1 T. Isobe,1 A. Jungclaus,8 D. Kameda,1 G. D. Kim,16 Y.-K. Kim,16,17 I. Kojouharov,18 F. G. Kondev,19 T. Kubo,1 N. Kurz,18 Y. K. Kwon,16 G. J. Lane,20 Z. Li,21 A. Montaner-Pizá,22 K. Moschner,23 F. Naqvi,24 M. Niikura,11 H. Nishibata,25 A. Odahara,25 R. Orlandi,26 Z. Patel,27 Zs. Podolyák,27 H. Sakurai,1,11 H. Schaffner,18 G. S. Simpson,3 K. Steiger,15 H. Suzuki,1 H. Takeda,1 A. Wendt,23 A. Yagi,25 and K. Yoshinaga28 1RIKEN Nishina Center, 2-1 Hirosawa, Wako-shi, Saitama 351-0198, Japan 2Department of Physics, Beihang University, Beijing 100191, China 3LPSC, Université Joseph Fourier Grenoble 1, CNRS/IN2P3, Institut National Polytechnique de Grenoble, F-38026 Grenoble Cedex, France 4School of Computing, Engineering and Mathematics, University of Brighton, Brighton BN2 4JG, United Kingdom 5Department of Physics, Chung-Ang University, Seoul 156-756, Republic of Korea 6Department of Physics, Tohoku University, Aoba, Sendai, Miyagi 980-8578, Japan 7Departamento de Fı́sica Teórica, Universidad Autónoma de Madrid, E-28049 Madrid, Spain 8Instituto de Estructura de la Materia, CSIC, E-28006 Madrid, Spain 9Institute for Nuclear Research, Hungarian Academy of Sciences, P. O. Box 51, Debrecen, H-4001, Hungary 10Department of Physics, Peking University, Beijing 100871, China 11Department of Physics, University of Tokyo, Hongo, Bunkyo-ku, Tokyo 113-0033, Japan 12INFN Sezione di Milano, I-20133 Milano, Italy 13Department of Physics, Sungkyunkwan University, Suwon 440-746, Republic of Korea 14Dipartimento di Fisica, Università di Milano, I-20133 Milano, Italy 15Physik Department E12, Technische Universität München, D-85748 Garching, Germany 16Rare Isotope Science Project, Institute for Basic Science, Daejeon 305-811, Republic of Korea 17Department of Nuclear Engineering, Hanyang University, Seoul 133-791, Republic of Korea 18GSI Helmholtzzentrum für Schwerionenforschung GmbH, 64291 Darmstadt, Germany 19Nuclear Engineering Division, Argonne National Laboratory, Argonne, Illinois 60439, USA 20Department of Nuclear Physics, R.S.P.E., Australian National University, Canberra, A.C.T. 0200, Australia 21School of Physics, Peking University, Beijing 100871, China 22Instituto de Fı́sica Corpuscular, CSIC-University of Valencia, E-46980 Paterna, Spain 23Institut für Kernphysik, Universität zu Köln, Zülpicher Strasse 77, D-50937 Köln, Germany 24Wright Nuclear Structure Laboratory, Yale University, New Haven, Connecticut 06520-8120, USA 25Department of Physics, Osaka University, Machikaneyama-machi 1-1, Toyonaka, Osaka 560-0043, Japan 26Instituut voor Kern en Stralingsfysica, KU Leuven, University of Leuven, B-3001 Leuven, Belgium 27Department of Physics, University of Surrey, Guildford GU2 7XH, United Kingdom 28Department of Physics, Tokyo University of Science, 2641 Yamazaki, Noda, Chiba 278-8510, Japan
131106858
Isomer and beta decay spectroscopy in the 132Sn region with EURICA
A. Jungclaus et al.; 4 pags.; 1 fig.; Open Access funded by Creative Commons Atribution Licence 2.0
120503228
Construction and tests of the MRPC detectors for TOF in ALICE
Abstract CERN-LHC (Large Hadron Collider) accelerator facility will provide heavy ions (Pb–Pb) collisions with a center-of-mass (CM) energy of about 5.5 TeV per nucleon pair. In the extreme conditions of temperature and energy density created in such collisions, a transition from hadronic matter towards a deconfined state of quarks and gluons is predicted by Quantum Chromodynamics (QCD) calculations on the lattice. The Time Of Flight (TOF) detector system of the ALICE (A Large Ion Collider Experiment) apparatus, is presently progressing in the assembling process at LHC at CERN. The TOF, in combination with the other central tracking detectors of ALICE provides an excellent Particle IDentification (PID) in the momentum range 0.2 – 2.5 GeV / c for K / π and up to 4 GeV/ c for K/p. The ALICE TOF is a barrel detector consisting of double-stack Multigap Resistive Plate Chamber (MRPC) strips, equipped with readout pads. The MRPC is characterized by an intrinsic time resolution below 50 ps and an efficiency over 99%. The assembling procedures, the tests of mechanics, cooling system and electronics of the 8 m long TOF “supermodules”, together with the performance tests before installation in the experimental area, will be presented.
109826413
Pre-installation tests and calibration of the ALICE TOF modules
Abstract Before installation into the ALICE experiment, all 87 modules of the TOF system had to undergo a series of tests. Initial check-ups included control of the gas tightness, readout connections quality, and high-voltage tests. Further tests were performed on a specially constructed Cosmic Ray Test Facility, where main characteristics of the modules were scanned under the working high voltage by means of cosmic muons. All TOF channels proved to provide the detection efficiency of more than 97% and time resolution of 80–110 ps, which complies with the ALICE requirements.
16382276
Multiplicity studies and effective energy in ALICE at the LHC
In this work we explore the possibility to perform “effective energy” studies in very high energy collisions at the CERN large hadron collider (LHC). In particular, we focus on the possibility to measure in pp collisions the average charged multiplicity as a function of the effective energy with the ALICE experiment, using its capability to measure the energy of the leading baryons with the zero degree calorimeters. Analyses of this kind have been done at lower centre-of-mass energies and have shown that, once the appropriate kinematic variables are chosen, particle production is characterized by universal properties: no matter the nature of the interacting particles, the final states have identical features. Assuming that this universality picture can be extended to ion–ion collisions, as suggested by recent results from RHIC experiments, a novel approach based on the scaling hypothesis for limiting fragmentation has been used to derive the expected charged event multiplicity in AA interactions at LHC. This leads to scenarios where the multiplicity is significantly lower compared to most of the predictions from the models currently used to describe high energy AA collisions. A mean charged multiplicity of about 1000–2000 per rapidity unit (at η∼0) is expected for the most central Pb–Pb collisions at $\sqrt{s_{{\text{NN}}}} = 5.5\,\text{TeV}$.
121872628
The ALICE Time-Of-Flight detector: status and expected performance at the LHC startup
A. Akindinova, A. Alicib,c, P. Antoniolic, S. Arcellib,c, M. Basileb,c, G. Cara Romeoc, L. Cifarellib,c, F. Cindoloc, A. De Carod, D. De Gruttolad, S. De Pasqualed, M. Fusco Girardd, B. Guerzonib,c, D. Hatzifotiadouc, H.T. Junge, W.W. Junge, D.S. Kime, D.W. Kime, H.N. Kime, J.S. Kime, S. Kiseleva, G. Laurentic, K. Leee, S.C. Leee, D. Malkevicha, A. Margottic, R. Naniac, A. Nedosekina, F. Noferinic,g , P. Paganod, A. Pescic, O. Pinazzac, R. Preghenellac,f,∗, M. Ryabinina, E. Scapparonec, G. Sciolib,c, A. Silenzib,c, M. Tchoumakova, K. Voloshina, M.C.S. Williamsc, B. Zagreeva, C. Zampollig,h, A. Zichichib,c,f . a Institute for Theoretical and Experimental Physics, Moscow, Russia b Dipartimento di Fisica dell’Universita, Bologna, Italy c Sezione INFN, Bologna, Italy d Dipartimento di Fisica dell’Universita and INFN, Salerno, Italy e Department of Physics, Kangnung National University, Republic of Korea f Museo Storico della Fisica e Centro Studi e Ricerche “Enrico Fermi”, Rome, Italy g INFN–CNAF, Bologna, Italy h CERN, Geneva, Switzerland