/i/r - f>C, H. Niewodniczański Institute of Nuclear Physics Kraków i Xv \: •% &t>£ Annual :H< Report 1991 2 7 Ms ,1 8 0 Or I• o~1'ŚC' Henryk Niewodniczański Institute of Nuclear Physics 31-342 Kraków ul. Radzikowskiego 152 lei: (4812) 3702 22 m r «, fax: (4812) 37 54 41 §1 ' , tlx: 32 2461 e-mail: kortyna%[email protected] (High Energy Dpt.) 31-055 Kraków ul. Kawiory 26A tel: (48 12) 33 33 66 fax : (48 12) 33 38 84 tlx: 32 2294 e-mail: [email protected] Annual Report 1991 H.Niewodniczanski Institute of Nuclear Physics Kraków 1992 I, 4 RAPORT MR 1598 WYDANO NAKŁADEM INSTYTUTU FIZYKI JĄDROWEJ IM. HENRYKA NIEWODNICZAŃSKIEGO KRAKÓW, UL. RADZIKOWSKIEGO 152 Jfopię^ kserograficzną, druk i oprawę wykonano w IFJ Kraków Wydanie I Zam. 72/92 Nakład 400 egz. Note from the editors The material presented describing the scientific activities of the Henryk Niewodniczański Institute of Nuclear Physics in 1991 is the first annual report in several years. The arrangement of the reports from various departments reflects the present structure of the Institute and is meant to help in the future task of restructuring the Institute. Few guidelines proposed by the editorial board gave the individual departments much freedom in selecting the material and choosing the volume and format of presentation. Inhomogeneity and other flaws now obvious will, hopefully be avoided in future annual reports. We wish to express our gratitude to the authors for responding promptly and for the effort they put into the preparation of the reports. Valuable contribution by Jerzy Grębosz to the graphic outlook of this issue is warmly acknowledged. R. Broda, L. Leśniak, P. Malecki, Z. Stachura, H. Wojciechowski The Henryk Niewodniczański Institute of Nuclear Physics was founded in 1956. Since its very inception, the Institute carried out basic research in nuclear physics, in the condensed phase of matter studied by means of nuclear methods, in theoretical physics, and in applied nuclear physics and radiochemistry. Later on, other research fields, such as radiobiology, medical physics, nuclear geophysics and hydrology, and nuclr-ar magnetic resonance including niicroimaging, were developed at the Institute. In 1970 the Cracow Group of High Energy Physics joined the Institute. This considerably broadened the Institute's range of scientific research. The present basic research carried out in the Institute can be broadly classified into four main domains: high energy and elementary particle physics, nuclear reactions and nuclear spec- troscopy, condensed matter physics and applied nuclear physics, including enviromental studies. In all these disciplines, experimental and theoretical studies are carried out. We are also ac- tively involved in smaller projects on some selected subjects, such as medical and enviromental radiobiology, radiochemistry, fast-neutron cancer radiotherapy, thermoluminescence dosimetry and gas chromatography. Our "old" 120 cm cyclotron, U-120, has been in continuous operation for fast neutron cancer radiotherapy, radioisotope production and in studies of some selected reactions induced by alpha particles in the 23-28 MeV energy range. The "small" 48 cm cyclotron was used for PIGE and PIXE analyses and the pulsed neutron (d+d) generator was used for measurements of neutron cross sections on rock samples. The installation work of a 3.5 MV pressurized Van de GraafFaccelerator is almost completed. In August 1991 a beam of 18.6 MeV deuterons was extracted from our 144 cm isochronous cyclotron, AIC-144, currently under construction in our Institute. This opens new perspectives for medical applications. A major success was the completion and operation of a computer network linking all labo- ratories in the Institute, based on Vaxstations, The network has access to the world through CERN via the HEPNET system. In spite of severe financial difficulties, over the last year we were able to publish over 300 scientific papers, 50% of them in highly esteemed international journals. This achievement was possible, to large extent, due to international cooperation. Our main international partners are the CERN Organization, the Hahn-Meitner Institute in Berlin, the Juelicli Kernforschungszen- trum, the University of Muenster, GSI Darmstadt, CRN Strasbourg, Laboratoire du GANIL Caen, DESY Hamburg, KfK Karlsruhe, LNL Legnaro, Argonne National Laboratory, Purdue University, Brookhaven National Laboratory, Fermilab, Luisiana University at Baton Rouge, Lawrence Berkeley Laboratory and the JINR in Dubna. Since our last Progress Report was published many years ago, we decided to include in this volume a full account of our research as supplied by the authors of the contributions, avoiding any major selection. We hope that this will give the reader a good overview of the scientific activities of our staff including work performed withiu large-scale international projects. Let me finally thank all contributors for their effort to present their achievements to the inter- national scientific community, and the Report's Editorial Board for their hard and conciencious work. idrzej Budzanowski Professor of Physics Director. DIRECTORATE Director-General: Professor ANDRZEJ BUDZANOWSKI Deputy Directors: dr. Maryna Pollok-Stachurowa, prof. Michał Turała, dr. Piotr Malecki. SCIENTIFIC COUNCIL A. REPRESENTATIVES OF SCIENTIFIC PERSONNEL: Jerzy Bartke, prof. Leonard Lesniak, docent Rafał Broda, prof. Piotr Malecki, docent Andrzej Budzanowski, prof. Jacek Okołowicz, dr. Tomir Coghen, prof. Krzysztof Parliński, prof. Zygmunt Chyliński, docent Grzegorz Polok, dr. Jan A. Czubek, prof. Krzysztof Rybicki, prof. Andrzej Eskreys, prof. Jan Styczeń, prof. Jacek Hennel, prof. Michał Turała, prof. Andrzej Hrynkiewicz, prof. Michał Waligórski, docent Jerzy Janik, prof. Tadeusz Wasiutyński, docent Edward Kapuścik, prof. Kacper Zalewski, prof. Jan Kwieciński, prof. Andrzej Zuber, prof. Jan Łasa, docent B. REPRESENTATIVES OF TECHNICAL PERSONNEL: Adam Baranowski Ewa Krynicka, M.Sc. Bronisław Czech, Eng. Mieczysław Marek Kubica Jan Godlewski, M.Sc. Piotr Skóra, M.Sc. Wiesław Iwański, M.Sc. Zbigniew Szklarz Ewa Kozynacka Władysław Wiertek. Zbigniew Król, Eng. C. MEMBERS FROM OTHER INSTITUTES: Andrzej Białas, prof. (Jagiellonian Univ.) Wiesław Czyż, prof. (Jagieljonian Univ.) Jerzy Niewodniczariski, prof. (Academy of Mining and Metallurgy). DIVISION LEADERS Andrzej Budzanowski, prof. - Nuclear Reactions Andrzej Hrynkiweicz, prof. - Nuclear Spectroscopy Jerzy Janik, prof. - Structural Research Jan Kwieciński, prof. - Theory Tomir Coghen, prof. - Particle Physics Jan Czubek, prof. - Applied Nuclear Physics Jacek Hennel, prof. — Nuclear Radiospectroscopy Jan Mikubski, prof. - Nuclear Physical Chemistry Edward Obryk, dr. - Reactor Technology Antonina Cebulska-Wasilewska, docent. — Radiobiology Jerzy Szwabe, dr. - Accelerator Techniques Michał Waligórski, docent. — Health Physics Zbigniew Król, Eng. - Technical Services Barbara Grabowska - Finance Division Department of Nuclear •.: - Reactions r ' > s i - J DEPARTMENT OF NUCLEAR REACTIONS Head of the Department: Prof.dr Andrzej Budzanowski OVERVIEW: Research on nuclear reaction mechanism was concentrated on dynamics of heavy ion reactions and hsavy fragments emission from excited sd shell nuclei. A new classical dynamical molecular model of heavy ion reaction was thoroughly tested on the example of '2S+197Au reaction at 26 MeV/A. The onset of multifragmentation was found in the 32S+58Ni system at 840 MeV by measurements of triple coincidences of intermediate mass fragments. These experiments were done in close collaboration -with Hahn Meitner Institute (Berlin) using the Argus 4rr detector partially constructed in the INP Cracow. Emission of 12C, J0Ne and 160 was studied using the a + 28Si reaction at 26.5 MeV. The beam of a-particles was provided by U-120 cyclotron. In connection with this experiment a new scattering chamber and gas detection system was installed. Subthreshold pion production and particle particle correlations were studied for 40Ar+197Au system around 40 MeV/A Nuclear temperature was detenrined for hot systems at backward an- gles of emission. These exj. -iriments were performed in collaboration with the N"ntes University using GANIL accelerator. In the frame of cooperation with FZ Julich research on spin correlation of AA produced in the (pp) anihUation was peiformed. Details of the quark structure of A hyperon were inferred. Theoretical research was concentrated on finding a possible manifestation of subnudear degrees of freedom in scattering experiments at high momentum transfer. Longitudinal and transverse spectral functions in (e,e'p) and (e,e'n) channel were investigated. In the context of regular versus chaotic motion spectral properties of multi-dimensional separable systems in the ground state region were investigated. Chaotic motion in nuclear scattering was studied for the a-f12C system. The I2C target nucleus was treated as three fir-clusters. Part of the experiments were also performed in collaboration with the Institute of Physics of the Jagiellcnian University, Cracow. PERSONNEL: Andrzej Budzanowski, Professor — Head of the Department, i Stanisław Drożdż, Docent — Deputy Head of the Department Resecrch stafl (physicists): Andrzej Adamczak, Henryk Dąbrowski, Ludwik Freindl, Kazimierz Grotowski, Professor, Elżbieta Gula, Jacek Jakiel, Piotr Kamiński, Waldemar Karcz, Stanisław Kliczewski, Zbigrjew Lewandowski, Edwin Łożyński, Marian Madeja, Maria Makowska-Rzeszutko, Jacek Okołowicz Michał Palarczyk, Artur Siwek, Irena