Search

Your search keyword '"T. Kozik"' showing total 10 results
Start Over Author "T. Kozik" Topic nuclear reaction
10 results on '"T. Kozik"'

1. Rapidity dependent strangeness measurements in BRAHMS experiment at RHIC

Author

J H Lee, (for the BRAHMIS Collaboration), I G Bearden, D Beavis, C Besliu, B Budick, H Bøggild, C Chasman, C H Christensen, P Christiansen, J Cibor, R Debbe, E Enger, J J Gaardhøje, M Germinario, K Hagel, O Hansen, A Holm, H Ito, E Jakobsen, A Jipa, F Jundt, J I Jørdre, C E Jørgensen, R Karabowicz, E J Kim, T Kozik, T M Larsen, Y K Lee, G Løvhøiden, Z Majka, A Makeev, M Mikelsen, M Murray, J Natowitz, B S Nielsen, J Norris, K Olchanski, J Olness, D Ouerdane, R P aneta, F Rami, C Ristea, D Röhrich, B H Samset, D Sandberg, S J Sanders, P Staszel, T S Tveter, F Videbæk, R Wada, A Wieloch, Z Yin, and I S Zgura

Subjects
Physics, Nuclear physics, Nuclear reaction, Nuclear and High Energy Physics, Particle physics, Pion, Meson, Hadron, Transverse mass, Rapidity, Strangeness, Nuclear Experiment, Charged particle
Abstract

Particle production of charged kaons in central Au+Au collisions at has been studied as a function of rapidity by the BRAHMS collaboration at RHIC. The kaon spectral shapes are described well by an exponential in transverse mass for the rapidity range of 0 ≤ yK ≤ 3.3 with smoothly decreasing inverse slopes as the rapidity increases. For the charged kaon to pion ratios, while there is no significant rapidity dependence for the K+/π+ ratio, the K−/π− ratio shows a significant decrease from y ≈ 1 towards higher rapidities. The systematics of K−/K+ and ratios in the measured rapidity range demonstrates a strongly correlated behaviour which can be described by thermal–statistical models.

Published
2003
Full Text
View/download PDF

2. Pseudorapidity Distributions of Charged Particles fromAu+AuCollisions at the Maximum RHIC Energy,sNN=200GeV

Author

E. Enger, J. H. Lee, A. Jipa, R. Wada, Ian Gardner Bearden, Anders Holm, B. McBreen, Borge Svane Nielsen, Michael Murray, Christian Holm Christensen, C. Chasman, Trine Spedstad Tveter, D. Beavis, R. Debbe, D. Sandberg, Y. Blyakhman, Y. K. Lee, R. Karabowicz, H. Ito, Ole Hansen, C. E. Jørgensen, J. Cibor, B. H. Samset, R. Płaneta, J. Norris, M. Mikelsen, T. Keutgen, P. Staszel, F. Videbaek, J. Natowitz, Peter Christiansen, A. Wieloch, R. A. Sheetz, K. Hagel, T. F. Thorsteinsen, J. I. Jørdre, E. Jakobsen, T. Kozik, K. Olchanski, T. M. Larsen, Catalin-Lucian Ristea, H. Bøggild, D. Ouerdane, J. Olness, Z. Majka, S. J. Sanders, A. K. Holme, B. Budick, C. Besliu, A. Makeev, F. Jundt, F. Rami, G. Løvhøiden, D. Röhrich, J. J. Gaardhøje, E. J. Kim, and I. S. Zgura

Subjects
Physics, Nuclear reaction, Particle physics, Pseudorapidity, Physics::Medical Physics, General Physics and Astronomy, Production (computer science), Atomic physics, Nuclear Experiment, Nucleon, Centrality, Energy (signal processing), Charged particle
Abstract

We present charged-particle multiplicities as a function of pseudorapidity and collision centrality for the ${}^{197}\mathrm{Au}{+}^{197}\mathrm{Au}$ reaction at $\sqrt{{s}_{\mathrm{NN}}}\phantom{\rule{0ex}{0ex}}=\phantom{\rule{0ex}{0ex}}200\mathrm{GeV}$. For the $5%$ most central events we obtain ${\mathrm{dN}}_{\mathrm{ch}}/d\ensuremath{\eta}{|}_{\ensuremath{\eta}\phantom{\rule{0ex}{0ex}}=\phantom{\rule{0ex}{0ex}}0}\phantom{\rule{0ex}{0ex}}=\phantom{\rule{0ex}{0ex}}625\ifmmode\pm\else\textpm\fi{}55$ and ${N}_{\mathrm{ch}}{|}_{\ensuremath{-}4.7\ensuremath{\le}\ensuremath{\eta}\ensuremath{\le}4.7}\phantom{\rule{0ex}{0ex}}=\phantom{\rule{0ex}{0ex}}4630\ifmmode\pm\else\textpm\fi{}370$, i.e., $14%$ and $21%$ increases, respectively, relative to $\sqrt{{s}_{\mathrm{NN}}}\phantom{\rule{0ex}{0ex}}=\phantom{\rule{0ex}{0ex}}130\mathrm{GeV}$ collisions. Charged-particle production per pair of participant nucleons is found to increase from peripheral to central collisions around midrapidity. These results constrain current models of particle production at the highest RHIC energy.

Published
2002
Full Text
View/download PDF

3. Dynamic restrictions on the de-excitation of hot nuclei

Author

M. Gui, D. Utley, N. Mdeiwayeh, G.X. Dai, J. B. Natowitz, Ferid Haddad, M. Gonin, Zbigniew Sosin, R. Wada, R. Tezkratt, Z. Majka, J. Cibor, J. Li, B. Xiao, K. Hagel, Y. Lou, J. Blackadar, and T. Kozik

Subjects
Nuclear reaction, Nuclear physics, Decay scheme, Chemistry, Excited state, Cluster (physics), Atomic physics, Nuclear Experiment, Nuclear matter, Coincidence, Radioactive decay, Excitation
Abstract

Recent observations of particle emission in coincidence with heavy residues and with the fragments of binary decay processes provide information on both the statistical and the dynamical aspects of the decay of highly excited ‘‘Hot’’ nuclei. Evidence has been obtained for significant decreases in the nuclear level density with increasing excitation energy, for limiting temperatures which may signal a cluster phase in nuclear matter and for mass asymmetry dependent dynamic delays which invalidate simple statistical decay assumptions at intermediate excitation energies. A brief review of some such experiments is presented.

Published
1995
Full Text
View/download PDF

4. Elastic scattering ofNe20+Mg24atElab=50,60,80,90,and 100MeV

Author

Thierry Delbar, S. Micek, Ghislain Grégoire, Ns. Wall, P. Belery, K. Grotowski, and T. Kozik

Subjects
Nuclear reaction, Elastic scattering, Physics, Nuclear and High Energy Physics, Scattering, law, Cyclotron, Nuclear fusion, Absorption (chemistry), Atomic physics, Optical potential, Volume integral, law.invention
Abstract

Elastic scattering of /sup 24/Mg(/sup 20/Ne,/sup 20/Ne)/sup 24/Mg at /b E //sub lab/=50, 60, 80, 90, and 100 MeV was measured in an angular range of 10 degrees < thetas /sub c.m/

Published
1981
Full Text
View/download PDF

5. A gas ionization chamber for on-line heavy ion identification

Author

Zbigniew Sosin, S. Micek, K. Grotowski, and T. Kozik

Subjects
Physics, Nuclear reaction, Nuclear and High Energy Physics, Physics::Instrumentation and Detectors, Detector, Ion source, law.invention, law, Ionization, Ionization chamber, Atomic physics, Resistor, Discharge ionization detector, Instrumentation, Electron ionization
Abstract

A gas ionization chamber is described for on-line identification of products from nuclear reactions. The chamber can work with two different anodes: the resistor type or the split type. Response of the device, proved experimentally, enables fast identification of Z values subtending some defined region. Possible modifications of the detector are discussed. The concept of extending the Z value flexibility of the system is proposed.

Published
1986
Full Text
View/download PDF

6. The nonelastic projectile break-up cross section from particle-gamma coincidence measurements for the 6li + 40ca reaction at 156 mev

Author

T. Kozik, L. Freindl, S. Zagromski, H. Rebel, H.J. Gils, R. Płaneta, K. Grotowski, J. Buschmann, and H. Klewe-Nebenius

Subjects
Physics, Nuclear reaction, Nuclear physics, Nuclear and High Energy Physics, Cross section (physics), Break-Up, Projectile, Particle, Nuclear cross section, Atomic physics, Spectral line, Coincidence
Abstract

The cross sections for nonelastic break-up modes have been studied for the 6Li + 40Ca reaction at ELi = 156 MeV. Gamma-ray spectra from target-like residual nuclei were measured in coinci- dence with beam-velocity projectile fragments and a value for the nonelastic break-up cross section σb.unon = 582 ± 110 mb has been found. Together with results of inclusive charged-particle measure- ments we infer for the total break-up cross section σb.utot = 930 ± 115 mb comprising about 50% of the total reaction cross section. The nonelastic contribution of the break-up reaction appears to be less than predicted by the DWBA break-up theory. This result is directly evident from the differential cross sections by comparing inclusive and exclusive results.

Published
1986
Full Text
View/download PDF

7. Fusion in theNe20+Mg24system

Author

K. Grotowski, T. Kozik, Youssef El Masri, Ghislain Grégoire, G. Paic, S. Kopta, M. Albinska, P. Belery, Caroline Michel, Jean Vervier, R. Płaneta, Thierry Delbar, and J. Albinski

Subjects
Nuclear reaction, Physics, Nuclear and High Energy Physics, Angular momentum, Fusion, Nucleosynthesis, Yrast, Mass spectrum, Nuclear fusion, Atomic physics, Spectral line
Abstract

Inclusive ..gamma.. spectra from the /sup 20/Ne+ /sup 24/Mg interaction have been measured using from 45 up to 105 MeV /sup 20/Ne beams. Experimental mass and charge spectra are compared with statistical model calculations. Total reaction and fusion cross sections are extracted. The optical, Glas and Mosel, and Bass model calculations are presented and compared with the data. The limitation of the fusion cross section by the statistical yrast line is also discussed.

Published
1983
Full Text
View/download PDF

8. Mass spectra and fusion cross sections forNe20+Mg24interaction at 55 and 85 MeV

Author

T. Kozik, S. Kopta, G. Grégoire, M. Albinska, Y. El Masri, K. Grotowski, R. Płaneta, J. Albinski, R. Janseens, Th. Delbar, G. Paic, P. Belery, and Jean Vervier

Subjects
Nuclear physics, Nuclear reaction, Physics, Nuclear and High Energy Physics, Scattering, Mass spectrum, Nuclear fusion, Atomic physics, Inelastic scattering, Nucleon, Mass spectrometry, Deep inelastic scattering
Abstract

Inclusive gamma spectra from the /sup 20/Ne+/sup 24/Mg interaction have been measured using 55- and 85-MeV /sup 20/Ne ions. The identification of gamma lines allows the determination of mass spectra in the region 12

Published
1981
Full Text
View/download PDF

9. Particle identification using the (DELTA)E-E technique and pulse shape discrimination with the silicon detectors of the FAZIA project

Author

Giovanni Casini, A.J. Kordyasz, J. A. Dueñas, I. Cruceru, R. Berjillos, B. Borderie, Tomasz Kozik, Gabriele Pasquali, O. Lopez, P. Edelbruck, Ismael Martel, N. Le Neindre, Elio Rosato, A. Chbihi, Domenico Santonocito, Giacomo Poggi, E. Vient, M. Degerlier, C. Maiolino, V. L. Kravchuk, T. Marchi, M. Bruno, Andrea Stefanini, R. Bougault, Giorgio Baiocco, S. Carboni, V. Seredov, Eric Bonnet, Mariano Vigilante, Luca Morelli, M. Parlog, H. Petrascu, E. Galichet, R. Alba, Alessandro Olmi, L. Bardelli, F. Gramegna, Maurizio Bini, M. F. Rivet, Sandro Barlini, Laboratoire de physique corpusculaire de Caen (LPCC), Université de Caen Normandie (UNICAEN), Normandie Université (NU)-Normandie Université (NU)-École Nationale Supérieure d'Ingénieurs de Caen (ENSICAEN), Normandie Université (NU)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Institut de Physique Nucléaire d'Orsay (IPNO), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Grand Accélérateur National d'Ions Lourds (GANIL), Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), FAZIA, S., Carboni, S., Barlini, L., Bardelli, N., Leneindre, M., Bini, B., Borderie, R., Bougault, G., Casini, P., Edelbruck, A., Olmi, G., Pasquali, G., Poggi, M. F., Rivet, A. A., Stefanini, G., Baiocco, R., Berjillo, E., Bonnet, M., Bruno, A., Chbihi, I., Cruceru, M., Degerlier, J. A., Dueña, E., Galichet, F., Gramegna, A., Kordyasz, T., Kozik, V. L., Kravchuk, O., Lopez, T., Marchi, I., Martel, L., Morelli, M., Parlog, H., Petrascu, Rosato, Elio, V., Seredov, E., Vient, Vigilante, Mariano, R., Alba, D., Santonocito, C., Maiolino, S. Carboni, S. Barlini, L. Bardelli, N. Le Neindre, M. Bini, B. Borderie, R. Bougault, G. Casini, P. Edelbruck, A. Olmi, G. Pasquali, G. Poggi, M.F. Rivet, A.A. Stefanini, G. Baiocco, R. Berjillo, E. Bonnet, M. Bruno, A. Chbihi, I. Cruceru, M. Degerlier, J.A. Dueña, E. Galichet, F. Gramegna, A. Kordyasz, T. Kozik, V.L. Kravchuk, O. Lopez, T. Marchi, I. Martel, L. Morelli, M. Parlog, H. Petrascu, E. Rosato, V. Seredov, E. Vient, M. Vigilante, R. Alba, D. Santonocito, C. Maiolino, Normandie Université (NU)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), and Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)

Subjects
Nuclear reaction, Nuclear and High Energy Physics, ΔE-E, Current signal, Silicon detector, Silicon, SILICON DETECTORS, Nuclear Theory, chemistry.chemical_element, rivelatori al silicio, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 01 natural sciences, 7. Clean energy, PULSE SHAPE ANALYSIS, Effective nuclear charge, Particle identification, Nuclear physics, 0103 physical sciences, 010306 general physics, Nuclear Experiment, Instrumentation, Pulse shape discrimination, Physics, Isotope, 010308 nuclear & particles physics, Detector, Charge signal, Pulse (physics), chemistry, tecniche di indentificazione, discriminazione in forma dei segnali, particle identification, Beam (structure)
Abstract

The response of silicon-silicon-CsI(TI) and silicon-CsI(TI) telescopes to fragments produced in nuclear interactions has been studied. The telescopes were developed within the FAZIA collaboration. The capabilities of two methods are compared: (a) the standard Delta E-E technique and (b) the digital Pulse Shape Analysis technique (for identification of nuclear fragments stopped in a single Si-layer). In a test setup, nuclear fragments covering a large range in nuclear charge, mass and energy were detected. They were produced in nuclear reactions induced by a 35A MeV beam of Xe-129 impinging on various targets. It was found that the Delta E-E correlations allow the identification of all isotopes up to Z similar to 25. With the digital Pulse Shape Analysis it is possible to fully distinguish the charge of stopped nuclei up to the maximum available Z (slightly over that of the beam, Z=54).

Published
2012
Full Text
View/download PDF

10. Isospin transport in 84Kr+112,124Sn reactions at Fermi energies

Author

M. Cinausero, M.F. Rivet, N. Le Neindre, R. Bougault, T. Marchi, R. Alba, Sandro Barlini, Gabriele Pasquali, T. Twaróg, D. Gruyer, G. Spadaccini, O. Lopez, Elio Rosato, B. Borderie, Giovanni Casini, E. Bonnet, J.D. Frankland, Tomasz Kozik, Maurizio Bini, Silvia Piantelli, Alessandro Olmi, Luca Morelli, M. Parlog, A. Chbihi, Giacomo Poggi, E. Vient, C. Maiolino, Andrea Stefanini, F. Gramegna, M. Bruno, S. Carboni, P. R. Maurenzig, M. Degerlier, Mariano Vigilante, Domenico Santonocito, Laboratoire de physique corpusculaire de Caen (LPCC), Université de Caen Normandie (UNICAEN), Normandie Université (NU)-Normandie Université (NU)-École Nationale Supérieure d'Ingénieurs de Caen (ENSICAEN), Normandie Université (NU)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Grand Accélérateur National d'Ions Lourds (GANIL), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Institut de Physique Nucléaire d'Orsay (IPNO), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), FAZIA, Normandie Université (NU)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), S. Lunardi, P.G. Bizzeti, C. Bucci, M. Chiari, A. Dainese, P. Di Nezza, R. Menegazzo, A. Nannini, C. Signorini, J.J. Valiente-Dobon, S., Piantelli, G., Casini, A., Olmi, S., Barlini, M., Bini, S., Carboni, P. R., Maurenzig, G., Pasquali, G., Poggi, A. A., Stefanini, R., Bougault, N., Le Neindre, O., Lopez, M., Pârlog, E., Vient, E., Bonnet, A., Chbihi, J. D., Frankland, D., Gruyer, Rosato, Elio, Spadaccini, Giulio, Vigilante, Mariano, B., Borderie, M. F., Rivet, M., Bruno, L., Morelli, M., Cinausero, M., Degerlier, F., Gramegna, T., Marchi, R., Alba, C., Maiolino, D. Santonocito T., Kozik, and T., Twaróg

Subjects
Nuclear reaction, Physics, Density gradient, QC1-999, FOS: Physical sciences, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], nuclear reaction, Ion, isotopic identification, Diffusion process, Isospin, Nuclear reactions, Nuclear Experiment (nucl-ex), Atomic physics, Nuclear Experiment, Transport phenomena, Beam (structure), Nuclear Physics, Fermi Gamma-ray Space Telescope
Abstract

Isospin transport phenomena in dissipative heavy ion collisions have been investigated at Fermi energies with a beam of 84Kr at 35AMeV. A comparison of the /Z of light and medium products forward-emitted in the centre of mass frame when the beam impinges on a n-poor 112Sn and a n-rich 124Sn targets is presented. Data were collected by means of a three-layer telescope with very good performances in terms of mass identification (full isotopic resolution up to Z about 20 for ions punching through the first detector layer) built by the FAZIA Collaboration and located just beyond the grazing angle for both reactions. The /Z of the decay products emitted when the n-rich target is used is always higher than that associated to the n-poor one. Since the detector was able to measure only fragments coming from the QuasiProjectile decay and/or neck emission, the observed behaviour can be ascribed to the isospin diffusion, driven by the isospin gradient between QuasiProjectile and QuasiTarget. Moreover, for light fragments the /Z as a function of the lab velocity of the fragment increases when we move from the QuasiProjectile velocity to the centre of mass (neck zone). This effect can be interpreted as an evidence of isospin drift driven by the density gradient between the QuasiProjectile zone (at normal density) and the more diluted neck zone., Comment: 4 pages, 3 figures, Contribution to conference proceedings of the 25th International Nuclear Physics Conference (INPC 2013) Journal-ref: 25th International Nuclear Physics Conference (INPC 2013), Firenze : Italy (2013)

Published
2013
Full Text
View/download PDF

Catalog

Books, media, physical & digital resources
See catalog results