Information on the nuclear periphery from antiprotonic atoms

In the PS209 experiments at CERN two kinds of measurements were performed: the in-beam measurement of X-rays from antiprotonic atoms and the radiochemical, off-line determination of the yield of annihilation products with mass number At — 1 (less by 1 than the target mass). Both methods give observables which allows to study the peripheral matter density composition and distribution. A comparisons of the PS209 results with the theoretical and semiempirical predictions for neutron and proton densities and with the differences Arnp of the rms radii of neutrons and protons obtained in other experiments are also presented

Measurement of differential cross sections for the deuteron-proton breakup reaction at 160 MeV

W. Parol, A. Kozela, K. Bodek, A. Deltuva, M. Eslami-Kalantari, J. Golak, N. Kalantar-Nayestanaki, G. Khatri, St. Kistryn, J. Kubo´s, P. Kulessa, A. Magiera, H. Mardanpour, J. G. Messchendorp, I. Mazumdar, R. Skibiński, I. Skwira-Chalot, A. Ramazani-Moghaddam-Arani, D. Rozpędzik, H. Witała, B. Włoch, A. WrońskaDifferential cross sections for the deuteron breakup 1H(d, pp)n reaction were measured for a large set of 243 geometrical configurations at the beam energy of 80 MeV/nucleon. The cross-section data are normalized by the luminosity factor obtained on the basis of a simultaneous measurement of the elastic-scattering channel and the existing cross-section data for this process. The results are compared with the theoretical calculations modeling nuclear interactions with and without taking into account the three-nucleon force (3NF) and the Coulomb interaction. In the validated region of the phase space, both the Coulomb force and 3NF play an important role in providing a good description of the data. There are also regions in which description improvements due to the inclusion of 3NF are insufficient

Experimental study of three-nucleon dynamics in proton-deuteron breakup reaction

A measurement of the differential cross sections for the proton-deuteron elastic scattering and the deuteron breakup in collision with a proton was carried out at Cyclotron Center Bronowice using the BINA detection system. The very preliminary analysis of the experimental data taken at three proton beam energies: 108, 135 and 160 MeV is presented

Few-nucleon system dynamics studied via deuteron-deuteron collisions at 160 MeV

Pozostali autory: I. Ciepał, K. Bodek, N. Kalantar-Nayestanaki, G. Khatri, St. Kistryn, A. Kozela, J. Kubo´s, P. Kulessa, A. Magiera, J. Messchendorp, I. Mazumdar, W. Parol, R. Ramazani-Sharifabadi, D. Rozpedzik, I. Skwira-Chalot, B. Włoch, A. Wrońska, J. ZejmaFour nucleon scattering at intermediate energies provides unique opportunities to study effects of the two key ingredients of the nuclear dynamics, the nucleon-nucleon P-wave (NNP-wave) and the three-nucleon force (3NF). This is possible only with systematic and precise data, in conjunction with exact theoretical calculations. Using the BINA detector at KVI Groningen, the Netherlands, a rich set of differential cross section of the 2H(d, dp)n breakup reaction at 160 MeV deuteron beam energy has been measured. Besides the three-body breakup, also cross sections of the 2H(d, 3He)n proton transfer reaction have been obtained. The data are compared to the recent calculations for the threecluster breakup

Determination of phase space region for cross-check validation of the neutron detection in the BINA experiments

cd autorów: B. Włoch, K. Bodek, I Ciepał, M. Eslami-Kalantari, J. Golak, N. Kalantar-Nayestanaki, G. Khatri, St. Kistryn, A. Kozela, J. Kuboś, P. Kulessa, A. Magiera, H. Mardanpour, J. Messchendorp, I. Mazumdar, W. Parol, A. Ramazani-Moghaddam-Arani, D. Rozpędzik, R. Skibiński, I. Skwira-Chalot, H. Witała, A Wrońska, J. ZejmaDeuteron breakup reactions are basic laboratories for testing nuclear force models. Recent improvements in the data analysis allow for direct identification of neutrons in the BINA detection setup. This opens up the opportunity to study new aspects of few-nucleon system dynamics like charge dependence of nuclear force or Coulomb interaction. In this paper we determine regions along the kinematical curves where differential cross section of deuteron-proton breakup reactions can be measured by the proton-neutron and proton-proton coincidences simultaneously. This is particularly useful for validation of the neutron detection technique

Study of three-nucleon dynamics in the dp breakup collisions using the WASA detector

An experiment to investigate the 1H(d; pp)n breakup reaction using a deuteron beam of 300, 340, 380 and 400 MeV and the WASA detector has been performed at the Cooler Synchrotron COSY-Jülich. As a first step, the data collected at the beam energy of 340MeV are analysed, with a focus on the proton–proton coincidences registered in the Forward Detector. Elastically scattered deuterons are used for precise determination of the luminosity. The main steps of the analysis, including energy calibration, particle identification (PID) and efficiency studies, and their impact on the final accuracy of the result, are discussed

Annual observations of radon activity concentrations in dwellings of Silesian Voivodeship

In the paper, results of year-long measurements of radon levels in dwellings on the premises of Silesian Voivodeship are presented. Track etched detectors with polymer CR-39 foils were used in the investigations. As the studied buildings were located in different regions of Silesian Voivodeship, therefore results of measurements were analysed due to possible influence of geological structure or effect of mining operations in places, where given dwellings were situated. Elevated concentrations of radon were measured mostly in dwellings located in areas, where permeable Triassic limestone and dolomite occur, as it has been predicted. On the other hand, the impact of mining activity such as disintegration of rock-body and activation of faults plays an important role, too, because it enables radon migration and its entry into buildings. Beside the analysis of seasonal variations of radon activity concentration, the impact of temperature and pressure on these fluctuations outdoor and indoor buildings has been analysed

Current stage of studies of the star configurations at intermediate energies with the use of the BINA detector

cd autorów: Kazimierz Bodek, Izabela Ciepał, Mohammad Eslami-Kalantari, Nasser Kalantar-Nayestanaki, Ghanshyambhai Khatri, Stanisław Kistryn, Adam Kozela, Joanna Kuboś, Paweł Kulessa, Andrzej Magiera, Hossein Mardanpour, Johan Messchendorp, Indranil Mazumdar, Wiktor Parol, Ahmad Ramazani-Moghaddam-Arani, Dagmara Rozpędzik, Izabela Skwira-Chalot, Bogusław Włoch, Aleksandra Wrońska, Jacek ZejmaThe Space Star Anomaly in proton-deuteron breakup cross-section occurs at energies of about 10 MeV. Data for higher energies are sparse. Therefore, a systematic scan over star configurations in the range of intermediate energies between 50 and 100 MeV/nucleon is carried out on the basis of data collected with the large acceptance BINA detector. The preliminary cross section results for forward star configurations at 80 MeV/nucleon slightly surpass the theoretical calculations, but the systematic uncertainties are still under study. Also, a new variable describing rotation of star configurations is proposed

Configuration efficiency for deuteron breakup reaction investigation

The elastic scattering and deuteron breakup data were collected in the experiment performed at KVI with the use of unpolarized deuteron beam of 80 MeV per nucleon, impinging on hydrogen target. The aim of the analysis is to obtain absolute values of the differential cross section for deuteron breakup reaction. Precise determination of the detection efficiency is indispensable for that purpose. This report explains the efficiency correction introduced to account for the detector granulation and geometry

Simulation of Star configurations in the BINA detector

Star Anomaly is one of the most intriguing and unsolved discrepancies between theoretical calculations and experimental data observed in the domain of few-nucleon systems at low energies. Previous and upcoming measurements of the breakup reaction with the use of the BINA detector enable systematic studies of the Star configurations at intermediate energies. A dedicated simulation was developed to study feasibility of registering such events with the required accuracy and to support the future data analysis. An additional rotation angle has been introduced to parametrise the Star configurations. First results concerning the acceptance of certain segments of BINA for registering the Star configurations are presented