Marian Smoluchowski
Institute of Physics

Jagiellonian University in Kraków

Publications

ARTICLES

1. Search for C violation in the decay eta -> pi(0)e(+)e(-) with WASA-at-COSY
   R. Adlarson, WAC. Collaboration, W. Augustyniak, W. Bardan, M. Bashkanov, FS. Bergmann, M. Berlowski, A. Bondar, M. Buescher, H. Calen, I. Ciepal, H. Clement, E. Czerwinski, K. Demmich, R. Engels, A. Erven, W. Erven, W. Eyrich, R. Fedorets, K. Foehl, K. Fransson, F. Goldenbaum, A. Goswami, K. Grigoryev, CO. Gullstrom, L. Heijkenskjold, V. Hejny, N. Huesken, L. Jarczyk, T. Johansson, B. Kamys, G. Kemmerling, G. Khatri, A. Khoukaz, A. Khreptak, DA. Kirillov, S. Kistryn, H. Kleines, B. Klos, W. Krzemien, R. Kulessa, A. Kupsc, A. Kuzmin, K. Lalwani, D. Lersch, B. Lorentz, A. Magiera, R. Maier, R. Marciniewski, B. Marianski, HP. Morsch, R. Moskal, H. Ohm, W. Parol, EP. Rio, NM. Piskunov, D. Prasuhn, D. Pszczel, K. Pysz, A. Pyszniak, J. Ritman, A. Roy, Z. Rudy, O. Rundel, S. Sawant, S. Schadmand, I. Schatti-Ozerianska, et al.
   abstract

   PHYSICS LETTERS B 784 p. 378-384 (2018)
   We report on the search for the rare decay eta -> pi(0)e(+)e(-) which is of interest to study C violation in the electromagnetic interaction which would indicate contributions from physics beyond the Standard Model, since the allowed decay via a two-photon intermediate state is strongly suppressed. The experiment has been performed using the WASA-at-COSY installation, located at the COSY accelerator of the Forschungszentrum Julich, Germany. In total 3 x 10(7) events of the reaction pd -> He-3 eta have been recorded at an excess energy of Q = 59.8MeV. Based on this data set the C parity violating decay eta -> pi(0)gamma* -> pi(0)e(+)e(-) via a single-photon intermediate state has been searched for, resulting in new upper limits of Gamma(eta -> pi(0)e(+) e(-))/Gamma(eta -> pi(+) pi(-) pi(0)) < 3.28 x 10(-5) and Gamma(eta -> pi(0)e(+) e(-))/Gamma(eta -> all)< 7.5 x 10(-6) (CL=90%), respectively. (c) 2018 The Author. Published by Elsevier B.V.
2. Dielectron production in C-12+C-12 collisions at 2A GeV with the HADES spectrometer
   G. Agakichiev, C. Agodi, H. Alvarez-Pol, A. Balanda, D. Bertini, J. Bielcik, G. Bellia, M. Bohmer, H. Bokemeyer, JL. Boyard, P. Braun-Munzinger, P. Cabanelas, S. Chernenko, T. Christ, R. Coniglione, L. Cosentino, J. Diaz, F. Dohrmann, I. Duran, T. Eberl, W. Enghardt, L. Fabbietti, O. Fateev, C. Fernandez, P. Finocchiaro, J. Friese, I. Frohlich, B. Fuentes, C. Garabatos, JA. Garzon, R. Gernhauser, C. Gilardi, M. Golubeva, D. Gonzalez-Diaz, E. Grosse, F. Guber, T. Hennino, S. Hlavac, R. Holzmann, J. Homolka, A. Ierusalimov, I. Iori, A. Ivashkin, M. Jaskula, M. Jurkovic, M. Kagarlis, M. Kajetanowicz, B. Kampfer, K. Kanaki, T. Karavicheva, A. Kastenmuller, L. Kidon, P. Kienle, I. Koenig, W. Koenig, HJ. Korner, BW. Kolb, R. Kotte, R. Krucken, A. Kugler, W. Kuhn, R. Kulessa, A. Kurepin, S. Lang, S. Lange, J. Lehnert, E. Lins, et al.
   abstract

   PHYSICAL REVIEW LETTERS 98:5 052302 (2007)
   The invariant-mass spectrum of e(+) e(-) pairs produced in C-12 + C-12 collisions at an incident energy of 2 GeV per nucleon has been measured for the first time. The measured pair production probabilities span over 5 orders of magnitude from the pi(0)-Dalitz to the rho/omega invariant-mass region. Dalitz decays of pi(0) and eta account for all the yield up to 0.15 GeV/c(2), but for only about 50% above this mass. A comparison with model calculations shows that the excess pair yield is likely due to baryon-resonance and vector-meson decays. Transport calculations based on vacuum spectral functions fail, however, to describe the entire mass region.
3. Dilepton production in ion-ion collisions studied using HADES
   A. Kugler, H. Agakichiev, C. Agodi, H. Alvarez-Pol, A. Balanda, G. Bellia, D. Bertuni, J. Bielcik, K. Bohmer, H. Bokemeyer, JL. Boyard, P. Braun-Munzinger, P. Cabanelas, S. Chernenko, T. Christ, R. Coniglione, L. Cosentino, J. Diaz, F. Dohrmann, I. Duran, T. Eberl, W. Enghardt, L. Fabbietti, O. Fateev, C. Fernandez, P. Finocchiaro, J. Friese, L. Frohlich, B. Fuentes, C. Garabatos, JA. Garzon, R. Gernhauser, C. Gilardi, M. Golubeva, D. Gonzales-Diaz, E. Grosse, R. Guber, T. Hennino, S. Hlavac, R. Holzmann, J. Homolka, A. Ierusalimov, I. Iori, A. Vashkin, M. Jaskula, M. Jurkovic, M. Kagarlis, M. Kajetanowiz, B. Kampfer, K. Kanaki, T. Karavicheva, A. Kastenmuller, L. Kidon, P. Kienle, I. Koenig, W. Koenig, HJ. Korner, BW. Kolb, R. Kotre, F. Krizek, R. Krucken, W. Kuhn, R. Kulessa, A. Kurepin, S. Lang, S. Lange, J. Lehnert, et al.
   abstract

   PROC. AIP Conference Proceedings, VII LATIN AMERICAN SYMPOSIUM ON NUCLEAR PHYSICS AND APPLICATIONS 947 p. 436-+ (2007)
   The High-Acceptance Di-Electron Spectrometer installed at GSI Darmstadt is a second generation experiment to study production of dielectron pairs from proton, pion and nucleus induced reactions at the SIS/BEVALAC energy regime. During period 2002-4 medium-resolution data have been taken with HADES on the light C+C system at 1 and 2 AGeV. The data analysis confirms former finding of the DLS collaboration. First physics run on slightly heavier system Ar+KCl was carried out will almost full HADES setup at 2005.
4. HADES experiment: Di-lepton spectroscopy in p+p (2.2 GeV) and C+C (1 and 2 A GeV) collisions
   W. Przygoda, C. Agakishiev, C. Agodi, H. Alvarez-Pol, A. Balanda, R. Bassini, G. Bellia, D. Belver, J. Bielcik, A. Blanco, M. Bohmer, C. Boiano, A. Bortolotti, J. Boyard, S. Brambilla, P. Braun-Munzinger, P. Cabanelas, S. Chernenko, T. Christ, R. Coniglione, M. Dahlinger, J. Diaz, R. Djeridi, F. Dohrmann, I. Duran, T. Eberl, W. Enghardt, L. Fabbietti, O. Fateev, P. Finocchiaro, P. Fonte, J. Friese, I. Frohlich, J. Garzon, R. Gernhauser, M. Golubeva, D. Gonzalez-Diaz, E. Grosse, F. Guber, T. Heinz, T. Hennino, S. Hlavac, J. Hoffmann, R. Holzmann, A. Ierusalimov, I. Iori, A. Ivashkin, M. Jaskula, M. Jurkovic, M. Kajetanowicz, B. Kampfer, K. Kanaki, T. Karavicheva, D. Kirschner, I. Konig, W. Konig, B. Kolb, U. Kopf, R. Kotte, J. Kotulic-Bunta, R. Krucken, A. Kugler, W. Kuhn, R. Kulessa, S. Lang, J. Lehnert, L. Maier, et al.
   abstract

   PROC. ACTA PHYSICA POLONICA B 37:1 p. 139-151 (2006)
   The HADES (High Acceptance Di-Electron Spectrometer) is a tool designed for lepton pair (e(+)e(-)) spectroscopy in pion, proton and heavy ion induced reactions in the 1-2 A GeV energy range. One of the goals of the HADES experiment is to study in-medium modifications of hadron properties like effective masses, decay widths, electromagnetic form factors etc. Such effects can be probed with vector mesons (rho, omega, phi) decaying into e(+)e(-) channel. The identification of vector mesons by means of a HADES spectrometer is based on invariant mass reconstruction of e+e- pairs. The combined information from all spectrometer sub-detectors is used to reconstruct the di-lepton signal. The recent results from 2.2 GeV p + p, 1 A GeV and 2 A GeV C+C experiments are presented.
5. Di-electron measurements in C+C reactions at 2 GeV center dot A with HADES
   T. Eberl, G. Agakishiev, C. Agodi, H. Alvarez-Pol, A. Balanda, G. Bellia, J. Bielcik, M. Bohmer, JL. Boyard, P. Braun-Munzinger, S. Chernenko, T. Christ, R. Coniglione, R. Djeridi, F. Dohrmann, I. Duran, L. Fabbietti, O. Fateev, P. Finocchiaro, J. Friese, I. Frohlich, JA. Garzon, R. Gernhauser, M. Golubeva, D. Gonzalez-Diaz, E. Grosse, F. Guber, T. Hennino, S. Hlavac, R. Holzmann, A. Ierusalimov, I. Iori, M. Jaskula, M. Jurkovic, B. Kampfer, K. Kanaki, T. Karavicheva, I. Koenig, W. Koenig, BW. Kolb, R. Kotte, J. Kotulic-Bunta, R. Krucken, A. Kugler, W. Kuhn, R. Kulessa, A. Kurepin, S. Lang, J. Lehnert, C. Maiolino, J. Markert, V. Metag, J. Mousa, M. Munch, C. Muntz, L. Naumann, R. Novotny, J. Novotny, J. Otwinowski, YC. Pachmayer, LM. Pant, V. Pechenov, T. Perez, J. Pietraszko, R. Pleskac, V. Pospisil, W. Przygoda, et al.
   abstract

   PROC. NUCLEAR PHYSICS A 752 p. 433C-438C (2005)
   The High Acceptance DiElectron Spectrometer HADES has been recently commissioned at GSI, Darmstadt. It has been designed for systematic studies of hadron properties inside nuclear matter. We report first preliminary results on invariant masses of e(+)e(-)-pairs which were measured in C-12 + C-12 collisions at E-kin = 2 GeV.A. The analysis methods are briefly outlined and a comparison with detailed Monte-Carlo simulations is shown.
6. Dilepton analysis in the HADES spectrometer for C+C at 2 a GeV
   J. Bielcik, G. Agakishiev, C. Agodi, H. Alvarez-Pol, A. Balanda, G. Bellia, M. Bohmer, JL. Boyard, P. Braun-Munzinger, S. Chernenko, T. Christ, R. Coniglione, R. Djeridi, F. Dohrmann, I. Duran, T. Eberl, L. Fabbietti, O. Fateev, P. Finocchiaro, J. Friese, I. Frohlich, JA. Garzon, R. Gernhauser, M. Golubeva, D. Gonzalez-Daz, E. Grosse, F. Guber, T. Hennino, S. Hlavac, R. Holzmann, A. Ierusalimov, I. Iori, M. Jaskula, M. Jurkovic, B. Kampfer, K. Kanaki, T. Karavicheva, I. Koenig, W. Koenig, BW. Kolb, R. Kottel, J. Kotulic-Bunta, R. Krucken, A. Kugler, W. Kuhn, R. Kulessa, A. Kurepin, S. Lang, J. Lehnert, C. Maiolino, J. Markert, V. Metag, J. Mousa, M. Munch, C. Muntz, L. Naumann, R. Novotny, J. Novotny, J. Otwinowski, YC. Pachmayer, LM. Pant, V. Pechenov, T. Perez, J. Pietraszko, R. Pleskac, V. Pospisil, W. Przygoda, et al.
   abstract

   PROC. JOURNAL OF PHYSICS G-NUCLEAR AND PARTICLE PHYSICS 31:4 p. S231-S237 (2005)
   The high-acceptance dielectron spectrometer (HADES) has become operational at GSI Darmstadt. The primary physics programme is to study in-medium changes of light vector mesons via their e(+)e(-) decays. The methods of dilepton signal reconstruction in the HADES spectrometer and preliminary dilepton spectra for C+C reactions at 2 A GeV are presented. In the signal reconstruction, particularly important is the reduction of the huge combinatorial background arising from e+e- combinations of leptons from gamma conversion in materials with other leptons in the collision. The purity of the dilepton signal is determined by using GEANT simulations with the full HADES geometry and a realistic detector response.
7. Probing of in-medium hadron structure with HADES
   P. Salabura, G. Agakichiev, C. Agodi, H. Alvarez-Pol, A. Balanda, G. Bellia, J. Bielcik, M. Bohmer, J. Boyard, P. Braun-Munzinger, S. Chernenko, T. Christ, R. Coniglione, R. Djeridi, F. Dohrmann, I. Duran, T. Eberl, L. Fabbietti, O. Fateev, P. Finocchiaro, J. Friese, I. Frohlich, J. Garzon, R. Gernhauser, M. Golubeva, D. Gonzalez-Diaz, E. Grosse, F. Guber, T. Hennino, S. Hlavac, R. Holzmann, A. Ierusalimov, I. Iori, M. Jaskula, M. Jurkovic, B. Kampfer, K. Kanaki, T. Karavicheva, I. Koenig, W. Koening, B. Kolb, R. Kotte, J. Kotulic-Bunta, R. Krucken, A. Kugler, W. Kuhn, R. Kulessa, A. Kurepin, S. Lang, J. Lehnert, C. Maiolino, J. Markert, V. Metag, J. Mousa, M. Munch, C. Muntz, L. Naumann, J. Novotny, R. Novotny, J. Otwinowski, Y. Pachmayer, V. Pechenov, T. Perez, J. Pietraszko, R. Pleskac, V. Pospisil, W. Przygoda, et al.
   abstract

   PROC. NUCLEAR PHYSICS A 749 p. 150C-159C (2005)
   The High Acceptance DiElectron Spectrometer (HADES) has been recently commissioned at GSI Darmstadt. It has been designed to study hadron properties inside nuclear matter via measurements of dielectron decays in proton, pion and heavy ion induced reactions in 1 - 2 AGeV energy range. We report first preliminary results on invariant masses of e(+) e(-) pairs measured in C-12 + C-12 collisions at E = 2 AGeV and compare them to simulations based on UrQMD transport model. In summary we present and discuss planned experiments.
8. Dilepton analysis in the HADES spectrometer for C-12+C-12 at 2 AGEV
   J. Otwinowski, G. Agakichiev, C. Agodi, H. Alvarez-Poll, A. Balanda, G. Bellia, J. Bielcik, M. Bomer, H. Bokemeyer, J. Boyard, P. Braun-Munzinger, S. Chernenko, T. Christ, R. Coniglione, R. Djeridi, F. Dohrmann, D. Duran, T. Eberl, L. Fabbietti, O. Fateev, P. Finocchiaro, J. Friese, I. Frohlich, J. Garzon, R. Gernhauser, M. Golubeva, D. Gonzalez, E. Grosse, F. Gruber, T. Hennino, S. Hlavac, R. Holzmann, A. Ierusalimov, I. Iori, M. Jaskula, M. Jurkovic, B. Kampfer, K. Kanaki, T. Karavicheva, I. Koenig, W. Koenig, B. Kolb, U. Kopf, R. Kotte, J. Kotulic-Bunta, R. Krucken, A. Kugler, W. Kuhn, R. Kulessa, A. Kurepin, S. Lang, J. Lehnert, C. Maiolino, J. Market, V. Metag, J. Mousa, M. Munch, C. Muntz, L. Naumann, J. Novotny, J. Novotny, Y. Pachmayer, LM. Pant, V. Pechenov, T. Perez, J. Pietraszko, R. Pleskac, V. Pospisil, et al.
   abstract

   PROC. INTERNATIONAL JOURNAL OF MODERN PHYSICS A 20:2-3 p. 602-605 (2005)
   The identification of the light mesons in the HADES spectrometer is based on an invariant mass reconstruction of their decay into e(+)e(-) pairs. In the dilepton (e(+)e(-)) signal reconstruction, particularly important is the reduction of a huge combinatorial background arising from wrong combinations of e(+) and e(-) to unlike sign pairs. Methods of the dilepton signal and combinatorial background reconstruction in the HADES spectrometer will be presented.
9. The HADES pre-shower detector
   A. Balanda, M. Jaskula, M. Kajetanowicz, L. Kidon, K. Korcyl, W. Kuhn, R. Kulessa, A. Malarz, J. Otwinowski, M. Petri, J. Pietraszko, W. Prokopowicz, W. Przygoda, P. Salabura, A. Skoczen, M. Szczybura, E. Wajda, W. Walus, M. Wisniowski, T. Wojcik
   abstract

   NUCL. INST. METH. PHYS. RES. A 531:3 p. 445-458 (2004)
   The Pre-Shower detector was built for the high acceptance di-electron spectrometer to identify electrons produced in pion, proton and heavy ion-induced reactions in the 0.2 < p < 1.5 GeV/c momentum range. The system is composed of three layers of wire chambers interleaved with two layers of lead converters for electromagnetic shower formation. A scintillator wall is placed in front of the detector for time-of-flight measurements. The paper describes the Pre-Shower detector construction, the detector operation, the read-out electronics and its response to charged particles studied with electron, proton and heavy ion beams. (c) 2004 Elsevier B.V. All rights reserved.
10. Charged hadrons and leptons identification at HADES
    A. Kugler, H. Agakishiev, C. Agodi, H. Alvarez-Pol, A. Balanda, G. Bellia, J. Bielcik, M. Bohmer, J. Boyard, P. Braun-Munzinger, S. Chernenko, T. Christ, R. Coniglione, R. Djeridi, F. Dohrmann, I. Duran, T. Eberl, L. Fabbietti, O. Fateev, P. Finocchiaro, J. Friese, I. Frohlich, J. Garzon, R. Gernhauser, M. Golubeva, D. Gonzales-Dias, E. Grosse, F. Guber, T. Hennino, S. Hlavac, R. Holzmann, A. Ierusalimov, I. Iori, M. Jaskula, M. Jurkovi, B. Kampfer, K. Kanaki, T. Karavicheva, I. Koenig, W. Koenig, B. Kolb, R. Kotte, J. Kotulic-Bunta, R. Krucken, W. Kuhn, R. Kulessa, A. Kurepin, S. Lang, J. Lehnert, C. Maiolino, J. Markert, V. Metag, J. Mousa, M. Munch, C. Muntz, L. Naumann, R. Novotny, J. Novotny, J. Otwinowski, Y. Pachmayer, V. Pechenov, T. Perez, J. Pietraszko, R. Pleskac, V. Pospisil, W. Przygoda, N. Rabin, et al.
    abstract

    ACTA PHYSICA SLOVACA 54:4 p. 375-384 (2004)
    The HADES spectrometer installed at GSI Darmstadt is devoted to the study of the production of di- lepton pairs from vector meson decays in relativistic nucleus-nucleus collisions, as well as proton- and pion-induced reactions. Extraction of rare lepton pairs in high hadron multiplicity events requires an efficient particle identification ( PID). In HADES charged particles momentum is measured by a tracking system surrounding the toroidal super conducting magnet, and velocity and energy loss is provided by a TOF detector. Leptons are identified by a Rich as well as a Shower detector. The particle identification method is using full experimental information from all subdetectors. To demonstrate the method performance, single particle spectra of charged hadrons and leptons from C+C at 2 A GeV will be presented and compared with results of corresponding simulations. The proton and pion yields an m T and rapidity distributions will be compared with existing data. Very preliminary results of lepton analysis will be shown as well.
11. Particle identification at HADES
    A. Kugler, H. Agakichiev, C. Agodi, M. Alvarez-Pardo, H. Alvarez-Pol, E. Badura, A. Balanda, F. Ballester, A. Bassi, R. Bassini, G. Bellia, D. Bertini, J. Bielcik, M. Bohmer, C. Boiano, H. Bokemeyer, JL. Boyard, S. Brambilla, P. Braun-Munzinger, S. Chernenko, R. Coniglione, M. Dahlinger, H. Daues, R. Diaz, F. Dohrmann, I. Duran, T. Eberl, L. Fabietti, O. Fateev, C. Fernandez, P. Finocchiaro, J. Friese, I. Frohlich, B. Fuentes, JA. Garzon, B. Genolini, R. Gernhauser, M. Golubeva, D. Gonzales, H. Goringer, E. Grosse, F. Guber, J. Hehner, T. Hennino, S. Hlavac, J. Hoffmann, R. Holzmann, J. Homolka, A. Ierusalimov, I. Iori, M. Jaksula, B. Kampfer, K. Kanaki, T. Karavichieva, D. Kirschner, L. Kidon, P. Kienle, I. Koenig, W. Koenig, HJ. Korner, BW. Kolb, U. Kopf, R. Kotte, W. Kuhn, T. Kurtukian, R. Krucken, R. Kulessa, et al.
    abstract

    PROC. NUCLEAR PHYSICS A 734 p. 78-81 (2004)
12. Study of e(+), e(-) production in elementary and nuclear collisions near the production threshold with HADES
    P. Salabura, G. Agakichiev, C. Agodi, H. Alvarez-Pol, A. Balanda, G. Bellia, D. Belver, J. Bielcik, M. Bohmer, H. Bokemeyer, J. Boyard, P. Braun-Munzinger, V. Chepurnov, S. Chernenko, T. Christ, R. Coniglione, J. Diaz, R. Djeridi, F. Dohrmann, I. Duran, T. Eberl, V. Emeljanov, L. Fabbietti, O. Fateev, C. Fernandez, P. Finocchiaro, J. Friese, I. Frohlich, B. Fuentes, J. Garzon, R. Gernhauser, M. Golubeva, D. Gonzalez, E. Grosse, F. Guber, T. Hennino, S. Hlavac, J. Hoffmann, R. Holzmann, A. Ierusalimov, I. Lori, M. Jaskula, M. Jurkovic, B. Kampfer, K. Kanaki, T. Karavicheva, I. Koenig, W. Koenig, B. Kolb, R. Kotte, J. Kotulic-Bunta, R. Krucken, A. Kugler, W. Kuhn, R. Kulessa, A. Kurepin, T. Kurtukian-Nieto, S. Lang, J. Lehner, C. Maiolino, J. Marn, J. Markert, V. Metag, N. Montes, J. Mousa, M. Munch, C. Muntz, et al.
    abstract

    PROC. Progress in Particle and Nuclear Physics, PROGRESS IN PARTICLE AND NUCLEAR PHYSICS, VOL 53, NO 1 53:1 p. 49-58 (2004)
    HADES is a second generation experiment designed to study dielectron production in proton, pion, and heavy ion induced reactions at the GSI accelerator facility in Darmstadt. The physics programme of HADES is focused on in-medium properties of the light vector mesons. In this contribution we present status of the HADES experiment, demonstrate its capability to identify rare dielectron signal, show first experimental results obtained from C + C reactions at 2 A GeV and shortly discuss physics programme of up-coming experimental runs. (C) 2004 Elsevier B.V. All rights reserved.
13. Performance of the pre-shower system in the HADES spectrometer
    J. Pietraszko, A. Balanda, M. Jaskula, L. Kidon, R. Kulessa, E. Lubkiewicz, A. Malarz, J. Otwinowski, W. Prokopowicz, W. Przygoda, P. Salabura, E. Wajda, W. Walus, M. Pioskon, T. Wojcik, M. Kajetanowicz, K. Korcyl, A. Skoczen
    abstract

    PROC. Astroparticle Particle Space Physics Radiation Interaction Detectors andMedical Physics Applications, ADVANCED TEC...
    The Pre-Shower detector system of the HADES spectrometer is applied to electron identification with emphasis on fast hadron rejection at forward angles. The detector is operated in the self-quenching streamer mode (SQS) to simplify on-line recognition of electromagnetic showers. Stable electronics at low noise guarantee robust pattern recognition through the experimental runs. The construction and performance of the detector is presented.
14. Development of a fast pad readout system for the HADES shower detector
    A. Balanda, M. Debowski, M. Jaskula, L. Kidon, R. Kulessa, J. Foryciarz, E. Lubkiewicz, A. Malarz, J. Otwinowski, J. Pietraszko, W. Prokopowicz, A. Ratajczak, P. Salabura, E. Wajda, W. Walus, M. Kajetanowicz, K. Korcyl, A. Skoczen, W. Kuhn, M. Petri
    abstract

    NUCL. INST. METH. PHYS. RES. A 417:2-3 p. 360-370 (1998)
    The paper presents the readout system for the 18432 channels of the HADES shower detector. The readout system consists of an analog front-end ASIC for the readout of the pad multiwire chamber, a resdout controller board, the so-called readout board for collection and digitization of the analog information from the ASIC and an optical link system for the data transfer. The readout system is designed to cope with event rate of 10(5) events/s and a data transfer rate of 1.9 Gbyte/s. Utilizing a multistage fast multiplexing system, the cost per channel is kept on the level of $5. Recent results from a test experiment confirm the intended performance of the readout system. (C) 1998 Elsevier Science B.V. All rights reserved.
15. Absence of EO transitions around 1.8 MeV after collisions of U-238 with Ta-181
    E. Ditzel, JM. Hoogduin, H. Backe, J. Baumann, FWN. deBoer, H. Bokemeyer, M. Debowski, R. Ganz, J. Gerl, T. Happ, M. Kaspar, J. vanKlinken, T. Kroll, R. Kulessa, I. Peter, P. Salabura, H. Schaffner, S. Schremmer, K. Vetter, HJ. Wollersheim, H. Xie
    abstract

    ZEITSCHRIFT FUR PHYSIK A-HADRONS AND NUCLEI 358:1 p. 11-14 (1997)
    E0 transitions have been searched for in U+Ta collisions around the Coulomb barrier with a novel arrangement correcting for Doppler effects. At transition energies around 1.8 MeV no E0 decays have been observed which results in upper cross-section limits of 0.1 mb in U-238 and 0.3 mb in Ta-181 (95% confidence level).