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1. Neutron spectroscopic factors of 55Ni hole-states from (p,d) transfer reactions

Author

A. Sanetullaev, M.B. Tsang, W.G. Lynch, Jenny Lee, D. Bazin, K.P. Chan, D. Coupland, V. Henzl, D. Henzlova, M. Kilburn, A.M. Rogers, Z.Y. Sun, M. Youngs, R.J. Charity, L.G. Sobotka, M. Famiano, S. Hudan, D. Shapira, W.A. Peters, C. Barbieri, M. Hjorth-Jensen, M. Horoi, T. Otsuka, T. Suzuki, and Y. Utsuno

Subjects
Physics, QC1-999
Abstract

Spectroscopic information has been extracted on the hole-states of 55Ni, the least known of the quartet of nuclei (55Ni, 57Ni, 55Co and 57Cu), one nucleon away from 56Ni, the N=Z=28 double magic nucleus. Using the H1(Ni56,d)Ni55 transfer reaction in inverse kinematics, neutron spectroscopic factors, spins and parities have been extracted for the f7/2, p3/2 and the s1/2 hole-states of 55Ni. These new data provide a benchmark for large basis calculations that include nucleonic orbits in both the sd and pf shells. State of the art calculations have been performed to describe the excitation energies and spectroscopic factors of the s1/2 hole-state below Fermi energy.

Published
2014
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2. Neutron recognition in the LAND detector for large neutron multiplicity

Author

E. Rapisarda, E. Le Gentil, C. Volant, T. Barczyk, A. Mykulyak, I. Iori, Håkan T Johansson, K. Sümmerer, A.N. Otte, M. De Napoli, P. Adrich, R. Bassini, J. Brzychczyk, Z. Majka, J. Łukasik, C. Sfienti, H. Weick, Giuseppe Verde, J.D. Frankland, S. Kupny, H. Sann, D. M. Rossi, A. Wieloch, M. D. Salsac, Cornelius Schwarz, S. Leray, M. Veselsky, A. Chbihi, D. Henzlova, Piotr Pawłowski, Y. Leifels, W. Trautmann, A. Boudard, S. Bianchin, A. Lafriakh, Alberto Pullia, H. Emling, J. Immè, J. Wiechula, C. Boiano, C.O. Bacri, J.-E. Ducret, U. Lynen, J. Lühning, S. Hlavac, M. Mocko, W. G. Lynch, H. Orth, H. Simon, A. Le Fèvre, Thomas Aumann, G. Raciti, T. Gorbinet, M. S. Wallace, K. Boretzky, M. B. Tsang, K. Kezzar, Stefano Panebianco, Margareta Hellström, J. Cibor, B. Zwieglinski, B. Czech, R. Palit, W. F. J. Müller, 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), Département de Physique Nucléaire (ex SPhN) (DPHN), Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, 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), 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, LAND, Astrophysics::High Energy Astrophysical Phenomena, Hadron, Nuclear Theory, FOS: Physical sciences, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], neutron detection, 01 natural sciences, Particle detector, Nuclear physics, 0103 physical sciences, Neutron detection, Heavy-ion reactions, Neutron, [PHYS.PHYS.PHYS-INS-DET]Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det], heavy-ion reactions, Nuclear Experiment (nucl-ex), 010306 general physics, Nuclear Experiment, Instrumentation, Physics, 010308 nuclear & particles physics, Detector, Measuring instrument, Nucleon
Abstract

The performance of the LAND neutron detector is studied. Using an event-mixing technique based on one-neutron data obtained in the S107 experiment at the GSI laboratory, we test the efficiency of various analytic tools used to determine the multiplicity and kinematic properties of detected neutrons. A new algorithm developed recently for recognizing neutron showers from spectator decays in the ALADIN experiment S254 is described in detail. Its performance is assessed in comparison with other methods. The properties of the observed neutron events are used to estimate the detection efficiency of LAND in this experiment., 16 pages, 8 figures

Published
2012
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3. Erratum: Isospin-dependent multifragmentation of relativistic projectiles [Phys. Rev. C 83, 024608 (2011)]

Author

J. Lühning, W. G. Lynch, H. Orth, H. Simon, I. Iori, E. Le Gentil, A. S. Botvina, J. Lukasik, Giuseppe Verde, G. Imme, Håkan T Johansson, C. Volant, H. Emling, A. Wieloch, Cornelius Schwarz, C. Boiano, Y. Leifels, H. Sann, A. Chbihi, H. Weick, Wolfgang Müller, T. Barczyk, A. Mykulyak, C. Sfienti, M. S. Wallace, S. Bianchin, K. Sümmerer, J.-E. Ducret, E. Rapisarda, J.D. Frankland, C.O. Bacri, J. Brzychczyk, A. Lafriakh, Alberto Pullia, Piotr Pawłowski, P. Adrich, Riza Ogul, J. Cibor, B. Zwieglinski, R. Bassini, A. Le Fèvre, M. B. Tsang, Thomas Aumann, R. Palit, U. Lynen, G. Raciti, Z. Majka, B. Czech, I. N. Mishustin, Nihal Büyükçizmeci, U. Atav, Margareta Hellström, W. Trautmann, M. Mocko, D. Henzlova, A. Boudard, J. Wiechula, A.N. Otte, M. De Napoli, K. Kezzar, 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), 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 Recherches sur les lois Fondamentales de l'Univers (IRFU), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, 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), and 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)

Subjects
Nuclear physics, Physics, Nuclear and High Energy Physics, 25.70.Pq, 25.70.Mn, 21.65.Ef, 99.10.Cd, 010308 nuclear & particles physics, Projectile, Isospin, 0103 physical sciences, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 010306 general physics, 01 natural sciences
Published
2012
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4. Isospin effects in 40,48Ca+40,48Ca collisions

Author

Betty Tsang, D. Henzlova, David Brown, Jenny Lee, L. G. Sobotka, J. M. Elson, Giuseppe Verde, A. Chbihi, D. Coupland, K. Xu, Sylvie Hudan, S. M. Lukyanov, M. Youngs, C. Herlitzius, W. G. Lynch, Michael Famiano, R. T. de Souza, V. Henzl, Z. Y. Sun, A. M. Rogers, M. Kilburn, Alisher Sanetullaev, Mark S. Wallace, Grand Accélérateur National d'Ions Lourds (GANIL), 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 physics, Physics, Nuclear and High Energy Physics, Isospin, Nuclear Theory, Neutron, Imaging technique, Reaction system, Atomic physics, Proton emission, Detector array, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], Nuclear Experiment
Abstract

Expérience à MSU-NSCL; International audience; The isospin dependence of two proton correlations is studied in 40Ca+40Ca and 48Ca+48Ca collisions at E/A = 80 MeV. Measurements were performed with the HiRA detector array complemented by the 4π Ball at NSCL. We observe a strong isospin dependence of the ppcorrelation functions; however the emitting source radius extracted using the imaging technique yields no sensitivity to the isospin of the reaction system. We interpret this result as a consequence of smaller fraction of fast proton emission in the neutron rich 48Ca system.

Published
2009
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5. Residual Nuclei Production in the reaction 136Xe+ deuterium at 500 A MeV

Author

J. A. Alcántara-Núñez, J. Benlliure, D. Pérez-Loureiro, P. Armbruster, L. Audouin, M. Bernas, A. Boudard, E. Casarejos, T. Enqvist, B. Fernández-Domínguez, M. Fernández Ordóñez, A. Heinz, V. Henzl, D. Henzlova, A. Kelić, A. Lafriaskh, S. Leray, P. Napolitani, J. Pereira, R. Pleskač, F. Rejmund, M. V. Ricciardi, C. Stéphan, K.-H. Schmidt, C. Schmitt, L. Tassan-Got, C. Villagrasa, C. Volant, O. Yordanov, J. A. Caballero, C. E. Alonso, M. V. Andrés, J. E. García Ramos, F. Pérez-Bernal, 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), 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), Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, Helmholtz zentrum für Schwerionenforschung GmbH (GSI), J.A. Caballero, C.E. Alonso, M.V. Andres, J.E. Garcia Ramos, F. Rérez-Bernal, 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), and 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)

Subjects
Nuclear reaction, Chemistry, 28.41.Kw, 26.40.Sc, 29.40.Cs, 29.40.Mc, Nuclear Theory, Radiochemistry, Separator (oil production), scintillators, Scintillator, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], ionisation chamber, Particle detector, Isotope separation, law.invention, spallation (nuclear), Nuclear physics, Fragmentation (mass spectrometry), Deuterium, law, Physics::Accelerator Physics, Spallation, Nuclear Experiment, Radioactive ion beams
Abstract

International audience; More than six hundred nuclei produced in the fragmentation of 136Xe projectiles at 500 A MeV on a liquid deuterium target were identified using inverse kinematics at the GSI Fragment Separator (FRS). These data are relevant for understanding of spallation reactions.

Published
2009
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6. Discriminant Analysis and Secondary-Beam Charge Recognition

Author

I. Iori, S. Bianchin, Z. Majka, Håkan T Johansson, H. Weick, M. B. Tsang, E. Le Gentil, P. Adrich, C. Volant, J. Łukasik, M. S. Wallace, T. Barczyk, Cornelius Schwarz, J.-E. Ducret, A. Mykulyak, Y. Leifels, E. Rapisarda, A. Lafriakh, Margareta Hellström, Alberto Pullia, B. Czech, A. Le Fèvre, H. Sann, Thomas Aumann, G. Imme, C. Sfienti, J.D. Frankland, W. F. J. Müller, C.O. Bacri, Giuseppe Verde, J. Cibor, H. Emling, U. Lynen, R. Palit, A. Chbihi, C. Boiano, J. Lühning, M. Mocko, G. Raciti, K. Sümmerer, K. Kezzar, W. G. Lynch, H. Orth, J. Brzychczyk, H. Simon, A. S. Botvina, B. Zwieglinski, W. Trautmann, Piotr Pawłowski, A. Wieloch, D. Henzlova, A. Boudard, J. Wiechula, A.N. Otte, M. De Napoli, R. Bassini, Helmholtz zentrum für Schwerionenforschung GmbH (GSI), 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), Istituto Nazionale di Fisica Nucleare, Sezione di Milano (INFN), Istituto Nazionale di Fisica Nucleare (INFN), Département de Physique Nucléaire (ex SPhN) (DPHN), Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, 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), Istituto Nazionale di Fisica Nucleare, Sezione di Catania (INFN), Università degli studi di Catania [Catania], ALADIN, 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), 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), and Università degli studi di Catania = University of Catania (Unict)

Subjects
Nuclear and High Energy Physics, Statistical methods, Nuclear Theory, FOS: Physical sciences, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 01 natural sciences, Nuclear physics, Fragmentation (mass spectrometry), 0103 physical sciences, Neutron, Nuclear Experiment (nucl-ex), 010306 general physics, Nuclear Experiment, Instrumentation, Physics, Isotope, radioactive beams, 02.50.Sk, 25.70.Mn, 010308 nuclear & particles physics, Projectile, Detector, projectile fragmentation, Linear discriminant analysis, discriminant analysis, Isospin, Beam (structure)
Abstract

The discriminant-analysis method has been applied to optimize the exotic-beam charge recognition in a projectile fragmentation experiment. The experiment was carried out at the GSI using the fragment separator (FRS) to produce and select the relativistic secondary beams, and the ALADIN setup to measure their fragmentation products following collisions with Sn target nuclei. The beams of neutron poor isotopes around 124La and 107Sn were selected to study the isospin dependence of the limiting temperature of heavy nuclei by comparing with results for stable 124Sn projectiles. A dedicated detector to measure the projectile charge upstream of the reaction target was not used, and alternative methods had to be developed. The presented method, based on the multivariate discriminant analysis, allowed to increase the efficacy of charge recognition up to about 90%, which was about 20% more than achieved with the simple scalar methods., Comment: 6 pages, 7 eps figures, elsart, submitted to Nucl. Instr. and Meth. A

Published
2008
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7. Extrapolation of neutron-rich isotope cross-sections from projectile fragmentation

Author

Michael Famiano, X. D. Liu, V. Henzl, D. Henzlova, M. B. Tsang, W. G. Lynch, S. M. Lukyanov, Z. Y. Sun, Franck Delaunay, M. S. Wallace, L. Andronenko, A. M. Rogers, M. Andronenko, M. Mocko, William A. Friedman, and H. Hui

Subjects
Physics, Ion beam, Isotope, Binding energy, Nuclear Theory, Fragmentation (computing), Extrapolation, General Physics and Astronomy, FOS: Physical sciences, Nuclear physics, Physics::Accelerator Physics, Neutron, Nuclear Experiment (nucl-ex), Nucleon, Nuclear Experiment, Projectile fragmentation
Abstract

Using the measured fragmentation cross sections produced from the 48Ca and 64Ni beams at 140 MeV per nucleon on 9Be and 181Ta targets, we find that the cross sections of unmeasured neutron rich nuclei can be extrapolated using a systematic trend involving the average binding energy. The extrapolated cross-sections will be very useful in planning experiments with neutron rich isotopes produced from projectile fragmentation. The proposed method is general and could be applied to other fragmentation systems including those used in other radioactive ion beam facilities., accepted for publication in Europhysics Letters

Published
2007

8. Residue production in 136Xe + p spallation reaction

Author

P. Napolitani, Andreas Martin Heinz, Enrique Casarejos, T. Enqvist, O. Yordanov, T. Kurtukian, M. Bernas, R. Pleskac, J. Pereira, M. Fernandez-Ordonez, P. Armbruster, C. Volant, D. Henzlova, V. Henzl, A. Junghans, A. Boudard, B. Jurado, A. Kelic, C. Stéphan, L. Tassan-Got, M. V. Ricciardi, L. Giot, A. Wagner, L. Audouin, J.-E. Ducret, A. Krasa, J. Benlliure, K.-H. Schmidt, Ch. Schmitt, C.O. Bacri, S. Leray, F. Rejmund, C. Villagrasa, C. Paradela, Laboratoire SUBATECH Nantes (SUBATECH), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université de Nantes (UN)-Mines Nantes (Mines Nantes), Département de Physique Nucléaire (ex SPhN) (DPHN), Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, Centre d'Etudes Nucléaires de Bordeaux Gradignan (CENBG), Université Sciences et Technologies - Bordeaux 1-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Institut de Physique Nucléaire de Lyon (IPNL), Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Mines Nantes (Mines Nantes)-Université de Nantes (UN)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Université Sciences et Technologies - Bordeaux 1 (UB)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Université Claude Bernard Lyon 1 (UCBL), and Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)

Subjects
Residue (chemistry), Engineering, Waste management, Chemical engineering, business.industry, Nuclear Theory, Nuclear data, Physics::Accelerator Physics, Spallation, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], business, Nuclear Experiment, 7. Clean energy
Abstract

Commune avec ACEN; International audience; A research program on spallation reactions in inverse kinematics has been performed at GSI, Darmstadt, taking advantage of the relativistic heavy-ions beams available from GSI accelerators and the high-resolution magnetic spectrometer, used to identify the reactions products in-flight and to determine their kinematical properties. In this paper, we report the results obtained up to now on the spallation reaction 136Xe on protons, focusing on 500 and 200 AMeV energies.

Published
2007
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9. Production and half-lives on neutron-rich isotopes near N=126

Author

O. Yordanov, F. Becker, J. Giovinazzo, D. Henzlova, Enrique Casarejos, K.-H. Schmidt, J. Pereira, B. Blank, J. Benlliure, L. Audouin, M. Fernandez-Ordoñez, B. Jurado, D. Cortina-Gil, T. Kurtukian-Nieto, F. Rejmund, Z. Gacsi, Z. Dombradi, A. Krasznahorkay, 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), Centre d'Etudes Nucléaires de Bordeaux Gradignan (CENBG), and Université Sciences et Technologies - Bordeaux 1-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)

Subjects
Physics, Isotope, 010308 nuclear & particles physics, Astrophysics::High Energy Astrophysical Phenomena, Nuclear Theory, Radiochemistry, 27.80.+w, 25.70.Mn, 23.40.-s, 21.10.Gv, chemistry.chemical_element, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 01 natural sciences, Beta decay, Nuclear physics, chemistry, Fragmentation (mass spectrometry), Double beta decay, 0103 physical sciences, r-process, Neutron, Beryllium, Nuclear Experiment, 010306 general physics, Open shell
Abstract

Communication commune avec l'équipe de recherche ACEN du CENBG; International audience; Heavy neutron-rich nuclei close to the neutron closed shell N = 126 were produced by fragmentation of a 1 A GeV 208Pb beam in a beryllium target at the Fragment Separator at GSI. Around 30 heavy neutron-rich isotopes have been synthesized for the first time and the half-lives of some of them have been determined.

Published
2005
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10. Characterizing laser-plasma ion accelerators driving an intense neutron beam via nuclear signatures.

Author

Favalli A, Guler N, Henzlova D, Croft S, Falk K, Gautier DC, Ianakiev KD, Iliev M, Palaniyappan S, Roth M, Fernandez JC, and Swinhoe MT

Abstract

Compact, bright neutron sources are opening up several emerging applications including detection of nuclear materials for national security applications. At Los Alamos National Laboratory, we have used a short-pulse laser to accelerate deuterons in the relativistic transparency regime. These deuterons impinge on a beryllium converter to generate neutrons. During the initial experiments where these neutrons were used for active interrogation of uranium and plutonium, we observed β-delayed neutron production from decay of 9 Li, formed by the high-energy deuteron bombardment of the beryllium converter. Analysis of the delayed neutrons provides novel evidence of the divergence of the highest energy portion of the deuterons (i.e., above 10 MeV/nucleon) from the laser axis, a documented feature of the breakout afterburner laser-plasma ion acceleration mechanism. These delayed neutrons form the basis of non-intrusive diagnostics for determining the features of deuteron acceleration as well as monitoring neutron production for the next generation of laser-driven neutron sources.

Published
2019
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11. Laser-plasmas in the relativistic-transparency regime: Science and applications.

Author

Fernández JC, Cort Gautier D, Huang C, Palaniyappan S, Albright BJ, Bang W, Dyer G, Favalli A, Hunter JF, Mendez J, Roth M, Swinhoe M, Bradley PA, Deppert O, Espy M, Falk K, Guler N, Hamilton C, Hegelich BM, Henzlova D, Ianakiev KD, Iliev M, Johnson RP, Kleinschmidt A, Losko AS, McCary E, Mocko M, Nelson RO, Roycroft R, Santiago Cordoba MA, Schanz VA, Schaumann G, Schmidt DW, Sefkow A, Shimada T, Taddeucci TN, Tebartz A, Vogel SC, Vold E, Wurden GA, and Yin L

Abstract

Laser-plasma interactions in the novel regime of relativistically induced transparency (RIT) have been harnessed to generate intense ion beams efficiently with average energies exceeding 10 MeV/nucleon (>100 MeV for protons) at "table-top" scales in experiments at the LANL Trident Laser. By further optimization of the laser and target, the RIT regime has been extended into a self-organized plasma mode. This mode yields an ion beam with much narrower energy spread while maintaining high ion energy and conversion efficiency. This mode involves self-generation of persistent high magnetic fields (∼10 4  T, according to particle-in-cell simulations of the experiments) at the rear-side of the plasma. These magnetic fields trap the laser-heated multi-MeV electrons, which generate a high localized electrostatic field (∼0.1 T V/m). After the laser exits the plasma, this electric field acts on a highly structured ion-beam distribution in phase space to reduce the energy spread, thus separating acceleration and energy-spread reduction. Thus, ion beams with narrow energy peaks at up to 18 MeV/nucleon are generated reproducibly with high efficiency (≈5%). The experimental demonstration has been done with 0.12 PW, high-contrast, 0.6 ps Gaussian 1.053  μ m laser pulses irradiating planar foils up to 250 nm thick at 2-8 × 10 20  W/cm 2 . These ion beams with co-propagating electrons have been used on Trident for uniform volumetric isochoric heating to generate and study warm-dense matter at high densities. These beam plasmas have been directed also at a thick Ta disk to generate a directed, intense point-like Bremsstrahlung source of photons peaked at ∼2 MeV and used it for point projection radiography of thick high density objects. In addition, prior work on the intense neutron beam driven by an intense deuterium beam generated in the RIT regime has been extended. Neutron spectral control by means of a flexible converter-disk design has been demonstrated, and the neutron beam has been used for point-projection imaging of thick objects. The plans and prospects for further improvements and applications are also discussed.

Published
2017
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12. Neutron-proton asymmetry dependence of spectroscopic factors in ar isotopes.

Author

Lee J, Tsang MB, Bazin D, Coupland D, Henzl V, Henzlova D, Kilburn M, Lynch WG, Rogers AM, Sanetullaev A, Signoracci A, Sun ZY, Youngs M, Chae KY, Charity RJ, Cheung HK, Famiano M, Hudan S, O'Malley P, Peters WA, Schmitt K, Shapira D, and Sobotka LG

Abstract

Spectroscopic factors have been extracted for proton-rich 34Ar and neutron-rich 46Ar using the (p, d) neutron transfer reaction. The experimental results show little reduction of the ground state neutron spectroscopic factor of the proton-rich nucleus 34Ar compared to that of 46Ar. The results suggest that correlations, which generally reduce such spectroscopic factors, do not depend strongly on the neutron-proton asymmetry of the nucleus in this isotopic region as was reported in knockout reactions. The present results are consistent with results from systematic studies of transfer reactions but inconsistent with the trends observed in knockout reaction measurements.

Published
2010
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13. Mechanisms in knockout reactions.

Author

Bazin D, Charity RJ, de Souza RT, Famiano MA, Gade A, Henzl V, Henzlova D, Hudan S, Lee J, Lukyanov S, Lynch WG, McDaniel S, Mocko M, Obertelli A, Rogers AM, Sobotka LG, Terry JR, Tostevin JA, Tsang MB, and Wallace MS

Abstract

We report the first detailed study of the relative importance of the stripping and diffraction mechanisms involved in nucleon knockout reactions, by the use of a coincidence measurement of the residue and fast proton following one-proton knockout reactions. The measurements used the S800 spectrograph in combination with the HiRA detector array at the NSCL. Results for the reactions 9Be(9C,8B+X)Y and 9Be(8B,7Be+X)Y are presented and compared with theoretical predictions for the two reaction mechanisms calculated using the eikonal model. The data show a clear distinction between the stripping and diffraction mechanisms and the measured relative proportions are very well reproduced by the reaction theory. This agreement adds support to the results of knockout reaction analyses and their applications to the spectroscopy of rare isotopes.

Published
2009
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14. Isotopic dependence of the nuclear caloric curve.

Author

Sfienti C, Adrich P, Aumann T, Bacri CO, Barczyk T, Bassini R, Bianchin S, Boiano C, Botvina AS, Boudard A, Brzychczyk J, Chbihi A, Cibor J, Czech B, De Napoli M, Ducret JE, Emling H, Frankland JD, Hellström M, Henzlova D, Immè G, Iori I, Johansson H, Kezzar K, Lafriakh A, Le Fèvre A, Le Gentil E, Leifels Y, Lühning J, Lukasik J, Lynch WG, Lynen U, Majka Z, Mocko M, Müller WF, Mykulyak A, Orth H, Otte AN, Palit R, Pawłowski P, Pullia A, Raciti G, Rapisarda E, Sann H, Schwarz C, Simon H, Sümmerer K, Trautmann W, Tsang MB, Verde G, Volant C, Wallace M, Weick H, Wiechula J, Wieloch A, and Zwiegliński B

Abstract

The A/Z dependence of projectile fragmentation at relativistic energies has been studied with the ALADIN forward spectrometer at SIS. A stable beam of (124)Sn and radioactive beams of (124)La and (107)Sn at 600 MeV per nucleon have been used in order to explore a wide range of isotopic compositions. Chemical freeze-out temperatures are found to be nearly invariant with respect to the A/Z of the produced spectator sources, consistent with predictions for expanded systems. Small Coulomb effects (DeltaT approximately 0.6 MeV) appear for residue production near the onset of multifragmentation.

Published
2009
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