ALBERT

Description:    The elastic-scattering reaction 30 Si + was studied using the Thick Target Inverse Kinematics technique. Data were taken at a 30 Si beam energy of 150MeV in a reaction chamber filled with 4 He gas, corresponding to the excitation region of 12-24MeV in 34 S . The data were treated in the framework of a simplified R -matrix approach, and energies, widths and spin assignments were obtained for 111 resonances in an approximative manner. The structure is discussed within the concept of -cluster structure in the quasi-continuum of 34 S and is compared to recent data for 32 S . Content Type Journal Article Pages 1-7 DOI 10.1140/epja/i2011-11073-8 Authors M. Norrby, Department of Physics, Åbo Akademi, FIN-20500 Turku, Finland T. Lönnroth, Department of Physics, Åbo Akademi, FIN-20500 Turku, Finland V. Z. Goldberg, Russian Research Center “Kurchatov”, Moscow, Russia G. V. Rogachev, Department of Physics, Florida State University, Tallahassee, FL, USA M. S. Golovkov, Joint Institute for Nuclear Research, Dubna, Russia K. -M. Källman, Department of Physics, Åbo Akademi, FIN-20500 Turku, Finland M. Lattuada, Laboratori Nazionali del Sud, Istituto Nazionale di Fisica Nucleare, Catania, Italy S. V. Perov, Joint Institute for Nuclear Research, Dubna, Russia S. Romano, Laboratori Nazionali del Sud, Istituto Nazionale di Fisica Nucleare, Catania, Italy B. B. Skorodumov, Department of Physics, Åbo Akademi, FIN-20500 Turku, Finland G. P. Tiourin, Department of Physics, University of Jyväskylä, Jyväskylä, Finland W. H. Trzaska, Department of Physics, University of Jyväskylä, Jyväskylä, Finland A. Tumino, Laboratori Nazionali del Sud, Istituto Nazionale di Fisica Nucleare, Catania, Italy A. N. Vorontsov, Russian Research Center “Kurchatov”, Moscow, Russia Journal The European Physical Journal A - Hadrons and Nuclei Online ISSN 1434-601X Print ISSN 1434-6001 Journal Volume Volume 47 Journal Issue Volume 47, Number 6

Description:    Coupled-channels calculations for the elastic and inelastic scattering of K + at 715 MeV/ c by 6 Li and 12 C at 635, 715 and 800 kaon Lab momenta have been analysed. The optical potentials of 12 C and 6 Li are calculated in terms of the alpha-particle and deuteron optical potentials. Good fits to the experimental data and phenomenological calculations are obtained for 6 Li and 12 C nuclei. Content Type Journal Article Pages 1-7 DOI 10.1140/epja/i2011-11074-7 Authors A. A. Ebrahim, Physics Department, Assiut University, 71516 Assiut, Egypt Journal The European Physical Journal A - Hadrons and Nuclei Online ISSN 1434-601X Print ISSN 1434-6001 Journal Volume Volume 47 Journal Issue Volume 47, Number 6

Description:    The expression for polarized electric dipole moment of well-deformed reflection asymmetric nuclei is obtained in the framework of the liquid-drop model in the case of geometrically similar proton and neutron surfaces. The expression for polarized electric dipole moment consists of the first- and second-order terms. It is shown that the second-order correction terms of the polarized electric dipole moment are important for well-deformed nuclei. Content Type Journal Article Pages 1-9 DOI 10.1140/epja/i2011-11080-9 Authors V. Yu. Denisov, Institute for Nuclear Research, Prospect Nauki 47, 03680 Kiev, Ukraine Journal The European Physical Journal A - Hadrons and Nuclei Online ISSN 1434-601X Print ISSN 1434-6001 Journal Volume Volume 47 Journal Issue Volume 47, Number 6

Description:    The production of intense beams of light radioactive nuclei can be achieved at the SPIRAL2 facility using intense stable beams accelerated by the driver accelerator and impinging on light targets. The isotope 14 O is identified to be of high interest for future experiments. The excitation function of the production reaction 12 C( 3 He, n) 14 O was measured between 7 and 35MeV. Results are compared with literature data. As an additional result, we report the first cross-section measurement for the 12 C( 3 He, + n) 10 C reaction. Based on this new result, the potential in-target 14 O yield at SPIRAL2 was estimated: 2.4×10 11 pps, for 1mA of 3 He at 35MeV. This is a factor 140 higher than the in-target yield at SPIRAL1. Content Type Journal Article Pages 1-8 DOI 10.1140/epja/i2011-11072-9 Authors A. Pichard, GANIL, CEA/DSM-CNRS/IN2P3, Caen, France J. Mrázek, Nuclear Physics Institute ASCR P.R.I., Řež, Czech Republic M. Assié, IPN, Université Paris-Sud - 11 - CNRS/IN2P3, Orsay, France M. Hass, Weizmann Institute, Rehovot, Israel M. Honusek, Nuclear Physics Institute ASCR P.R.I., Řež, Czech Republic G. Lhersonneau, GANIL, CEA/DSM-CNRS/IN2P3, Caen, France F. de Oliveira Santos, GANIL, CEA/DSM-CNRS/IN2P3, Caen, France M. -G. Saint-Laurent, GANIL, CEA/DSM-CNRS/IN2P3, Caen, France E. Šimečková, Nuclear Physics Institute ASCR P.R.I., Řež, Czech Republic Journal The European Physical Journal A - Hadrons and Nuclei Online ISSN 1434-601X Print ISSN 1434-6001 Journal Volume Volume 47 Journal Issue Volume 47, Number 6

Description:    The production of Δ 0 (1232)-resonances in p + 12 C collisions at 4.2 GeV/ c was investigated with 4 π acceptance. The masses and widths of the resonances were obtained from ananalysis of foreground and background invariant-mass distributions of pπ − pairs obtained using an angular criterion. The fraction of charged π − -mesons coming from the Δ 0 (1232) decay was estimated and compared to those obtained in earlier analyses. The momentum, transverse momentum, kinetic energy, rapidity, and emission angle distributions as well as the invariant cross-sections of Δ 0 (1232)-resonances werere constructed in the laboratory frame. The freeze-out temperature of the Δ 0 (1232)-resonances produced in p + 12 C collisions was estimated and compared to the freeze-out temperatures obtained using different methods for Δ (1232)-resonances produced in other experiments with different sets of colliding nuclei at various incident energies. Content Type Journal Article Pages 1-16 DOI 10.1140/epja/i2011-11079-2 Authors Kh. K. Olimov, Department of Physics, COMSATS Institute of Information Technology, Park Road, Islamabad, Pakistan Mahnaz Q. Haseeb, Department of Physics, COMSATS Institute of Information Technology, Park Road, Islamabad, Pakistan Journal The European Physical Journal A - Hadrons and Nuclei Online ISSN 1434-601X Print ISSN 1434-6001 Journal Volume Volume 47 Journal Issue Volume 47, Number 6

Description: .   In case of chiral U A (1) symmetry restoration the mass of the boson (the ninth, would-be Goldstone boson) is decreased, thus its production cross-section is heavily enhanced. The decays (through one of its decay channels) into five low-momentum pions. These pions will not contribute to measured Bose-Einstein correlations, thus the production enhancement changes the strength of two-pion correlation functions at low momentum. Preliminary results on Bose-Einstein correlation functions support the mass decrease of the boson. In this paper we propose a method to select pions originating from decays. We investigate the efficiency of the proposed kinematical cut in several collision systems and energies with several simulators. We prove that our method can be used in all investigated collision systems. Content Type Journal Article Pages 1-5 DOI 10.1140/epja/i2011-11076-5 Authors M. Csanád, Department of Atomic Physics, Eötvös University, Pázmány Péter s. 1/A, H-1117 Budapest, Hungary M. Kõfaragó, Department of Atomic Physics, Eötvös University, Pázmány Péter s. 1/A, H-1117 Budapest, Hungary Journal The European Physical Journal A - Hadrons and Nuclei Online ISSN 1434-601X Print ISSN 1434-6001 Journal Volume Volume 47 Journal Issue Volume 47, Number 6

Description:    Benford’s law, also called the first-digit law, states that in lists of numbers from many quite disparate databases, the leading digit is distributed in a non-uniform but actually logarithmic way. We have investigated the first-digit distribution of experimental cross-sections of A ( n , ) B reactions. In the case of below-barrier -particle emission from compound nucleus, it is found that the ( n , ) reaction cross-sections approximately follow the first-digit distribution indicated by Benford’s law. The origin of this first-digit distribution is discussed within the framework of the statistical model. In addition, Benford’s law is used to test the evaluated cross-sections of A ( n , ) B reactions. Content Type Journal Article Pages 1-6 DOI 10.1140/epja/i2011-11078-3 Authors X. J. Liu, Department of Physics, Nanjing University, 210008 Nanjing, China X. P. Zhang, Department of Physics, Nanjing University, 210008 Nanjing, China D. D. Ni, Department of Physics, Nanjing University, 210008 Nanjing, China Z. Z. Ren, Department of Physics, Nanjing University, 210008 Nanjing, China Journal The European Physical Journal A - Hadrons and Nuclei Online ISSN 1434-601X Print ISSN 1434-6001 Journal Volume Volume 47 Journal Issue Volume 47, Number 6

Description:    In this article, we study the and heavy and doubly heavy baryon states , , , , , , , , and by subtracting the contributions from the corresponding and heavy and doubly heavy baryon states with the QCD sum rules in a systematic way, and make reasonable predictions for their masses. Content Type Journal Article Pages 1-12 DOI 10.1140/epja/i2011-11081-8 Authors Zhi-Gang Wang, Department of Physics, North China Electric Power University, 071003 Baoding, PRC Journal The European Physical Journal A - Hadrons and Nuclei Online ISSN 1434-601X Print ISSN 1434-6001 Journal Volume Volume 47 Journal Issue Volume 47, Number 6

Description:    High-accuracy mass measurements have been performed with the Penning trap mass spectrometer ISOLTRAP at ISOLDE/CERN. The short-lived nuclides 70, 71, 72, 73 Se , 72, 73, 74, 75 Br , and 98, 99, 100, 101, 103 Ag have been measured with an average uncertainty of a few keV. The data are important input for nucleosynthesis calculations of the rp-process beyond Z = 32 . Content Type Journal Article Pages 1-9 DOI 10.1140/epja/i2011-11075-6 Authors F. Herfurth, GSI Helmholtzzentrum für Schwerionenforschung, Planckstraße 1, 64291 Darmstadt, Germany G. Audi, CSNSM-IN2P3-CNRS, 91405 Orsay-Campus, France D. Beck, GSI Helmholtzzentrum für Schwerionenforschung, Planckstraße 1, 64291 Darmstadt, Germany K. Blaum, GSI Helmholtzzentrum für Schwerionenforschung, Planckstraße 1, 64291 Darmstadt, Germany G. Bollen, NSCL, Michigan State University, 48824-1321 East Lansing, MI, USA P. Delahaye, CERN, 1211 Geneva 23, Switzerland M. Dworschak, GSI Helmholtzzentrum für Schwerionenforschung, Planckstraße 1, 64291 Darmstadt, Germany S. George, Institut für Physik, Johannes Gutenberg-Universität, 55099 Mainz, Germany C. Guénaut, CSNSM-IN2P3-CNRS, 91405 Orsay-Campus, France A. Kellerbauer, CERN, 1211 Geneva 23, Switzerland D. Lunney, CSNSM-IN2P3-CNRS, 91405 Orsay-Campus, France M. Mukherjee, GSI Helmholtzzentrum für Schwerionenforschung, Planckstraße 1, 64291 Darmstadt, Germany S. Rahaman, GSI Helmholtzzentrum für Schwerionenforschung, Planckstraße 1, 64291 Darmstadt, Germany S. Schwarz, NSCL, Michigan State University, 48824-1321 East Lansing, MI, USA L. Schweikhard, Institut für Physik, Ernst-Moritz-Arndt-Universität, 17487 Greifswald, Germany C. Weber, GSI Helmholtzzentrum für Schwerionenforschung, Planckstraße 1, 64291 Darmstadt, Germany C. Yazidjian, GSI Helmholtzzentrum für Schwerionenforschung, Planckstraße 1, 64291 Darmstadt, Germany Journal The European Physical Journal A - Hadrons and Nuclei Online ISSN 1434-601X Print ISSN 1434-6001 Journal Volume Volume 47 Journal Issue Volume 47, Number 6

Description:    Using the available cross-section and polarization data for elastic electron-proton scattering, we provide an extraction of the two-photon exchange amplitudes at a common value of four-momentum transfer, around Q 2 = 2.5 GeV^2. This analysis also predicts the e + p / e - p elastic-scattering cross-section ratio, which will be measured by forthcoming experiments. Content Type Journal Article Pages 1-5 DOI 10.1140/epja/i2011-11077-4 Authors J. Guttmann, Institut für Kernphysik, Johannes Gutenberg-Universität, D-55099 Mainz, Germany N. Kivel, Institut für Kernphysik, Johannes Gutenberg-Universität, D-55099 Mainz, Germany M. Meziane, Physics Department, College of William and Mary, 23187 Williamsburg, VA, USA M. Vanderhaeghen, Institut für Kernphysik, Johannes Gutenberg-Universität, D-55099 Mainz, Germany Journal The European Physical Journal A - Hadrons and Nuclei Online ISSN 1434-601X Print ISSN 1434-6001 Journal Volume Volume 47 Journal Issue Volume 47, Number 6