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78 results on '"Stuttge, L."'

1. $^{178}$Hg and asymmetric fission of neutron-deficient pre-actinides

Author

Jhingan, A., Schmitt, C., Lemasson, A., Biswas, S., Kim, Y. H., Ramos, D., Andreyev, A. N., Curien, D., Ciemala, M., Clément, E., Dorvaux, O., De Canditiis, B., Didierjean, F., Duchêne, G., Dudouet, J., Frankland, J., Frémont, G., Goupil, J., Jacquot, B., Raison, C., Ralet, D., Retailleau, B. -M., Stuttgé, L., Tsekhanovich, I., Andreev, A. V., Goriely, S., Hilaire, S., Lemaître, J-F., Möller, P., and Schmidt, K. -H.

Subjects
Nuclear Experiment, Nuclear Theory
Abstract

Fission at low excitation energy is an ideal playground to probe the impact of nuclear structure on nuclear dynamics. While the importance of structural effects in the nascent fragments is well-established in the (trans-)actinide region, the observation of asymmetric fission in several neutron-deficient pre-actinides can be explained by various mechanisms. To deepen our insight into that puzzle, an innovative approach based on inverse kinematics and an enhanced version of the VAMOS++ heavy-ion spectrometer was implemented at the GANIL facility, Caen. Fission of $^{178}$Hg was induced by fusion of $^{124}$Xe and $^{54}$Fe. The two fragments were detected in coincidence using VAMOS++ supplemented with a new SEcond Detection arm. For the first time in the pre-actinide region, access to the pre-neutron mass and total kinetic energy distributions, and the simultaneous isotopic identification of one the fission fragment, was achieved. The present work describes the experimental approach, and discusses the pre-neutron observables in the context of an extended asymmetric-fission island located south-west of $^{208}Pb. A comparison with different models is performed, demonstrating the importance of this "new" asymmetric-fission island for elaborating on driving effects in fission.

Published
2022
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2. Chronology of the three-body dissociation of $^8$He

Author

Laurent, B., Marqués, F. M., Angulo, C., Ashwood, N. I., Borge, M. J. G., Bouchat, V., Catford, W. N., Clarke, N. M., Curtis, N., Freer, M., Hanappe, F., Kinnard, V., Labiche, M., Materna, T., McEwan, P., Nilsson, T., Ninane, A., Normand, G., Orr, N. A., Pain, S. D., Prokhorova, E., Stuttgé, L., and Timis, C.

Subjects
Nuclear Experiment, Nuclear Theory
Abstract

The space and time configurations of the dissociation of $^8$He into $^6$He+$n$+$n$, on C and Pb targets, have been explored simultaneously for the first time. The final-state interactions in the $n$-$n$ and $^6$He-$n$ channels are successfully described within a model that considers independent emission of neutrons from a Gaussian volume with a given lifetime. The dissociation on C target exhibits a dominant sequential decay through the ground state of $^7$He, consistent with neutrons being emitted from a Gaussian volume of $r_{nn}^{\rm{rms}}=7.3\pm0.6$~fm with a $n$-$n$ delay in the sequential channel of $1400\pm400$~fm/$c$, in agreement with the lifetime of $^7$He. The lower-statistics data on Pb target correspond mainly to direct breakup, and are well described using the $n$-$n$ volume measured, without any $n$-$n$ delay. The validity of the phenomenological model used is discussed., Comment: Accepted for publication in J. Phys. G, 11 pages, 5 figures

Published
2018
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3. Structure of $^{13}$Be probed via secondary beam reactions

Author

Randisi, G., Leprince, A., Falou, H. Al, Orr, N. A., Marqués, F. M., Achouri, N. L., Angélique, J. -C., Ashwood, N., Bastin, B., Bloxham, T., Brown, B. A., Catford, W. N., Curtis, N., Delaunay, F., Freer, M., Brennand, E. de Góes, Haigh, P., Hanappe, F., Harlin, C., Laurent, B., Lecouey, J. -L., Ninane, A., Patterson, N., Price, D., Stuttgé, L., and Thomas, J. S.

Subjects
Nuclear Experiment
Abstract

The low-lying level structure of the unbound neutron-rich nucleus $^{13}$Be has been investigated via breakup on a carbon target of secondary beams of $^{14,15}$B at 35 MeV/nucleon. The coincident detection of the beam velocity $^{12}$Be fragments and neutrons permitted the invariant mass of the $^{12}$Be+$n$ and $^{12}$Be+$n$+$n$ systems to be reconstructed. In the case of the breakup of $^{15}$B, a very narrow structure at threshold was observed in the $^{12}$Be+$n$ channel. Contrary to earlier stable beam fragmentation studies which identified this as a strongly interacting $s$-wave virtual state in $^{13}$Be, analysis here of the $^{12}$Be+$n$+$n$ events demonstrated that this was an artifact resulting from the sequential-decay of the $^{14}$Be(2$^+$) state. Single-proton removal from $^{14}$B was found to populate a broad low-lying structure some 0.70 MeV above the neutron-decay threshold in addition to a less prominent feature at around 2.4 MeV. Based on the selectivity of the reaction and a comparison with (0-3)$\hbar\omega$ shell-model calculations, the low-lying structure is concluded to most probably arise from closely spaced J$^\pi$=1/2$^+$ and 5/2$^+$ resonances (E$_r$=0.40$\pm$0.03 and 0.85$^{+0.15}_{-0.11}$ MeV), whilst the broad higher-lying feature is a second 5/2$^+$ level (E$_r$=2.35$\pm$0.14 MeV). Taken in conjunction with earlier studies, it would appear that the lowest 1/2$^+$ and 1/2$^-$ levels lie relatively close together below 1 MeV., Comment: 14 pages, 13 figures, 2 tables. Accepted for publication in Physical Review C

Published
2013
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4. The $^{8}$He and $^{10}$He spectra studied in the $(t$,$p)$ reaction

Author

Golovkov, M. S., Grigorenko, L. V., Ter-Akopian, G. M., Fomichev, A. S., Oganessian, Yu. Ts., Gorshkov, V. A., Krupko, S. A., Rodin, A. M., Sidorchuk, S. I., Slepnev, R. S., Stepantsov, S. V., Wolski, R., Pang, D. Y., Chudoba, V., Korsheninnikov, A. A., Kuzmin, E. A., Nikolskii, E. Yu., Novatskii, B. G., Stepanov, D. N., Roussel-Chomaz, P., Mittig, W., Ninane, A., Hanappe, F., Stuttge, L., Yukhimchuk, A. A., Perevozchikov, V. V., Vinogradov, Yu. I., Grishechkin, S. K., and Zlatoustovskiy, S. V.

Subjects
Nuclear Experiment
Abstract

The low-lying spectra of $^8$He and $^{10}$He nuclei were studied in the $^3$H($^6$He,$p$)$^8$He and $^3$H($^8$He,$p$)$^{10}$He transfer reactions. The $0^+$ ground state (g.s.) of $^8$He and excited states, $2^+$ at $3.6-3.9$ MeV and $(1^+)$ at $5.3-5.5$ MeV, were populated with cross sections of 200, 100-250, and 90-125 $\mu$b/sr, respectively. Some evidence for $^8$He state at about 7.5 MeV is obtained. We discuss a possible nature of the near-threshold anomaly above 2.14 MeV in $^8$He and relate it to the population of a $1^-$ continuum (soft dipole excitation) with peak value at about 3 MeV. The lowest energy group of events in the $^{10}$He spectrum was observed at $\sim 3$ MeV with a cross section of $\sim 140$ $\mu$b/sr. We argue that this result is possibly consistent with the previously reported observation of $^{10}$He, in that case providing a new g.s. position for $^{10}$He at about 3 MeV., Comment: 18 pages, 8 figures, submitted to Phys. Lett. B

Published
2008
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5. Single-Proton Removal Reaction Study of 16B

Author

Lecouey, J. -L., Orr, N. A., Marques, F. M., Achouri, N. L., Angelique, J. -C., Brown, B. A., Catford, W. N., Clarke, N. M., Freer, M., Fulton, B. R., Grevy, S., Hanappe, F., Jones, K. L., Labiche, M., Lemmon, R. C., Ninane, A., Sauvan, E., Spohr, K. M., and Stuttge, L.

Subjects
Nuclear Experiment
Abstract

The low-lying level structure of the unbound system $^{16}$B has been investigated via single-proton removal from a 35 MeV/nucleon $^{17}$C beam. The coincident detection of the beam velocity $^{15}$B fragment and neutron allowed the relative energy of the in-flight decay of $^{16}$B to be reconstructed. The resulting spectrum exhibited a narrow peak some 85 keV above threshold. It is argued that this feature corresponds to a very narrow ($\Gamma \ll $100 keV) resonance, or an unresolved multiplet, with a dominant $\pi (p_{3/2})^{-1} \otimes \nu (d_{5/2}^3)_{J=3/2^+}$ + $\pi (p_{3/2})^{-1} \otimes \nu (d_{5/2}^2,s_{1/2})_{J=3/2^+}$ configuration which decays by d-wave neutron emission., Comment: 16 pages, 5 figures, 1 table, submitted to Phys. Lett. B

Published
2008
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6. B(E1) Strengths from Coulomb Excitation of 11Be

Author

Summers, N. C., Pain, S. D., Orr, N. A., Catford, W. N., Angelique, J. C., Ashwood, N. I., Bouchat, V., Clarke, N. M., Curtis, N., Freer, M., Fulton, B. R., Hanappe, F., Labiche, M., Lecouey, J. L., Lemmon, R. C., Mahboub, D., Ninane, A., Normand, G., Nunes, F. M., Soic, N., Stuttge, L., Timis, C. N., Thompson, I. J., Winfield, J. S., and Ziman, V.

Subjects
Nuclear Theory
Abstract

The $B$(E1;$1/2^+\to1/2^-$) strength for $^{11}$Be has been extracted from intermediate energy Coulomb excitation measurements, over a range of beam energies using a new reaction model, the extended continuum discretized coupled channels (XCDCC) method. In addition, a measurement of the excitation cross section for $^{11}$Be+$^{208}$Pb at 38.6 MeV/nucleon is reported. The $B$(E1) strength of 0.105(12) e$^2$fm$^2$ derived from this measurement is consistent with those made previously at 60 and 64 MeV/nucleon, i n contrast to an anomalously low result obtained at 43 MeV/nucleon. By coupling a multi-configuration description of the projectile structure with realistic reaction theory, the XCDCC model provides for the first time a fully quantum mechanical description of Coulomb excitation. The XCDCC calculations reveal that the excitation process involves significant contributions from nuclear, continuum, and higher-order effects. An analysis of the present and two earlier intermediate energy measurements yields a combined B(E1) strength of 0.105(7) e$^2$fm$^2$. This value is in good agreement with the value deduced independently from the lifetime of the $1/2^-$ state in $^{11}$Be, and has a comparable p recision., Comment: 5 pages, 2 figures, accepted for publication in Phys. Lett. B

Published
2007
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7. GABRIELA : a new detector array for gamma-ray and conversion electron spectroscopy of transfermium elements

Author

Hauschild, K., Yeremin, A. V., Lopez-Martens, A., Dorvaux, O., Belozerov, A. V., Briancon, C., Chelnokov, M. L., Chepigin, V. I., Garcia-Santamaria, S. A., Gorshkov, V. A., Hanappe, F., Kabachenko, A. P., Korichi, A., Malyshev, O. N., Oganessian, Yu. Ts., Popeko, A. G., Rowley, N., Shutov, A. V., Stuttge, L., and Svirikhin, A. I.

Subjects
Nuclear Experiment
Abstract

With the aid of the Geant4 Monte Carlo simulation package a new detection system has been designed for the focal plane of the recoil separator VASSILISSA situated at the Flerov Laboratory of Nuclear Reactions, JINR, Dubna. GABRIELA (Gamma Alpha Beta Recoil Investigations with the Electromagnetic Analyser VASSILISSA) has been optimised to detect the arrival of reaction products and their subsequent radioactive decays involving the emission of alpha- and beta-particles, fission fragments, gamma- and X-rays, and conversion electrons. The new detector system is described and the results of the first commissioning experiments are presented., Comment: 24 pages, Submitted to NIM A

Published
2006
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8. Proton induced reactions on naturalU at 62.9 MeV

Author

Guertin, A., Auduc, S., Rivière, G., Eudes, P., Haddad, F., Lebrun, C., Kirchner, T., Brun, C. Le, Lecolley, F. R., Lecolley, J. F., Louvel, M., Lefebvres, F., Marie, N., Varignon, C., Ledoux, X., Patin, Y., Pras, Ph., Delbar, Th., Ninane, A., Stuttge, L., Hanappe, F., and Collaboration, the GEDEON

Subjects
Nuclear Experiment
Abstract

Double differential cross sections (DDCS) for light charged particles (proton, deuteron, triton, 3He, alpha) and neutrons produced by a proton beam impinging on a 238U target at 62.9 MeV were measured at the CYCLONE facility in Louvain-la-Neuve (Belgium). These measurements have been performed using two independent experimental set-ups ensuring neutron (DeMoN counters) and light charged particles (Si-Si-CsI telescopes) detection. The charged particle data were measured at 11 different angular positions from 25 degrees to 140 degrees allowing the determination of angle differential, energy differential and total production cross sections.

Published
2005

9. Structure of 12Be: intruder d-wave strength at N=8

Author

Pain, S. D., Catford, W. N., Orr, N. A., Angelique, J. C., Ashwood, N. I., Bouchat, V., Clarke, N. M., Curtis, N., Freer, M., Fulton, B. R., Hanappe, F., Labiche, M., Lecouey, J. L., Lemmon, R. C., Mahboub, D., Ninane, A., Normand, G., Soic, N., Stuttge, L., Timis, C. N., Tostevin, J. A., Winfield, J. S., and Ziman, V.

Subjects
Nuclear Experiment
Abstract

The breaking of the N=8 shell-model magic number in the 12Be ground state has been determined to include significant occupancy of the intruder d-wave orbital. This is in marked contrast with all other N=8 isotones, both more and less exotic than 12Be. The occupancies of the 0 hbar omega neutron p1/2-orbital and the 1 hbar omega, neutron d5/2 intruder orbital were deduced from a measurement of neutron removal from a high-energy 12Be beam leading to bound and unbound states in 11Be., Comment: 5 pages, 2 figures

Published
2005
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10. Analysis of fusion-fission dynamics by pre-scission neutron emission in $^{58}$Ni+$^{208}$Pb

Author

Aritomo, Y., Ohta, M., Materna, T., Hanappe, F., Dorvaux, O., and Stuttge, L.

Subjects
Nuclear Theory
Abstract

We analyzed the experimental data of the pre-scission neutron multiplicity in connection with fission fragments in the reaction $^{58}$Ni+$^{208}$Pb at the incident energy corresponding to the excitation energy of compound nucleus $E^{*}$=185.9 MeV, which was performed by D\'{e}MoN group. The relation between the pre-scission neutron multiplicity and each reaction process having different reaction time is investigated. In order to study the fusion-fission process accompanied by neutron emission, the fluctuation-dissipation model combined with a statistical model is employed. It is found that the fusion-fission process and the quasi-fission process are clearly distinguished in correlation with the pre-scission neutron multiplicity., Comment: 11 figures

Published
2005
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11. Nucleon-induced reactions at intermediate energies: New data at 96 MeV and theoretical status

Author

Blideanu, V., Lecolley, F. R., Lecolley, J. F., Lefort, T., Marie, N., Atac, A., Ban, G., Bergenwall, B., Blomgren, J., Dangtip, S., Elmgren, K., Eudes, Ph., Foucher, Y., Guertin, A., Haddad, F., Hildebrand, A., Johansson, C., Jonsson, O., Kerveno, M., Kirchner, T., Klug, J., Brun, Ch. Le, Lebrun, C., Louvel, M., Nadel-Turonski, P., Nilsson, L., Olsson, N., Pomp, S., Prokofiev, A. V., Renberg, P. -U., Riviere, G., Slypen, I., Stuttge, L., Tippawan, U., and Osterlund, M.

Subjects
Nuclear Experiment
Abstract

Double-differential cross sections for light charged particle production (up to A=4) were measured in 96 MeV neutron-induced reactions, at TSL laboratory cyclotron in Uppsala (Sweden). Measurements for three targets, Fe, Pb, and U, were performed using two independent devices, SCANDAL and MEDLEY. The data were recorded with low energy thresholds and for a wide angular range (20-160 degrees). The normalization procedure used to extract the cross sections is based on the np elastic scattering reaction that we measured and for which we present experimental results. A good control of the systematic uncertainties affecting the results is achieved. Calculations using the exciton model are reported. Two different theoretical approches proposed to improve its predictive power regarding the complex particle emission are tested. The capabilities of each approach is illustrated by comparison with the 96 MeV data that we measured, and with other experimental results available in the literature., Comment: 21 pages, 28 figures

Published
2004
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12. Elements Discrimination in the Study of Super-Heavy Elements using an Ionization Chamber

Author

FULIS Collaboration, Wieloch, A., Sosin, Z., Peter, J., Lojek, K., Alamanos, N., Amar, N., Anne, R., Angelique, J. C., Auger, G., Dayras, R., Drouart, A., Fontbonne, J. M., Gillibert, A., Grevy, S., Hanappe, F., Hannachi, F., Hue, R., Khouaja, A., Legou, T., Lopez-Martens, A., Lienard, E., Manduci, L., Santos, F. de Oliveira, Politi, G., Saint-Laurent, M. G., Stodel, C., Stuttge, L., Tillier, J., de Tourreil, R., Villari, A. C. C., and Wieleczko, J. P.

Subjects
Nuclear Experiment
Abstract

Dedicated ionization chamber was built and installed to measure the energy loss of very heavy nuclei at 2.7 MeV/u produced in fusion reactions in inverse kinematics (beam of 208Pb). After going through the ionization chamber, products of reactions on 12C, 18O targets are implanted in a Si detector. Their identification through their alpha decay chain is ambiguous when their half-life is short. After calibration with Pb and Th nuclei, the ionization chamber signal allowed us to resolve these ambiguities. In the search for rare super-heavy nuclei produced in fusion reactions in inverse or symmetric kinematics, such a chamber will provide direct information on the nuclear charge of each implanted nucleus., Comment: submitted to NIMA, 10 pages+4 figures, Latex, uses elsart.cls and grahpicx

Published
2003
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13. The Role of Mass Asymmetry and Shell Structure in the Evaporation Residues Production

Author

Fazio, G., Giardina, G., Lamberto, A., Muminov, A. I., Nasirov, A. K., Yakhshiev, U. T., Oganessian, Yu. Ts., Popeko, A. G., Sagaidak, R. N., Yeremin, A. V., Hofmann, S., Hanappe, F., and Stuttge, L.

Subjects
Nuclear Theory, Nuclear Experiment
Abstract

The effects of the entrance channel and shell structure of reacting nuclei on the experimental evaporation residues have been studied by analysing the 40Ar+176Hf, 86Kr+130,136Xe, 124Sn+92Zr and 48Ca+174Yb reactions leading to the 216Th* and 222Th* compound nuclei. The measured excitation function of evaporation residues for the 124Sn+92Zr reaction was larger than that for the 86Kr+130Xe reaction. The experimental values of evaporation residues in the 86Kr+136Xe reaction were about 500 times larger than that in the 86Kr+130Xe reaction. These results are explained by the initial angular momentum dependence of the fusion excitation functions calculated in framework of the dinuclear system concept and by the differences in survival probabilities calculated in framework of advanced statistical model. The dependencies of the fission barrier and the \Gamma_n / \Gamma_f ratio on the angular momentum of the excited compound nucleus are taken into account., Comment: 13 pages, 9 (eps) figures, uses revtex4, submitted to Phys.Rev. C

Published
2002

14. Spallation Neutron Production by 0.8, 1.2 and 1.6 GeV Protons on various Targets

Author

Leray, S., Borne, F., Boudard, A., Brochard, F., Crespin, S., Drake, D., Duchazeaubeneix, J. C., Durand, D., Durand, J. M., Frehaut, J., Hanappe, F., Brun, C. Le, Lecolley, F. R., Lecolley, J. F., Ledoux, X., Lefebvres, F., Legrain, R., Louvel, M., Martinez, E., Meigo, S. I., Menard, S., Milleret, G., Patin, Y., Petibon, E., Pras, P., Stuttge, L., Terrien, Y., Thun, J., Varignon, C., Whittal, D. M., and Wlazlo, W.

Subjects
Nuclear Experiment
Abstract

Spallation neutron production in proton induced reactions on Al, Fe, Zr, W, Pb and Th targets at 1.2 GeV and on Fe and Pb at 0.8, and 1.6 GeV measured at the SATURNE accelerator in Saclay is reported. The experimental double-differential cross-sections are compared with calculations performed with different intra-nuclear cascade models implemented in high energy transport codes. The broad angular coverage also allowed the determination of average neutron multiplicities above 2 MeV. Deficiencies in some of the models commonly used for applications are pointed out., Comment: 20 pages, 32 figures, revised version, accepted fpr publication in Phys. Rev. C

Published
2001
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15. The Halo of 14Be

Author

Labiche, M., Orr, N. A., Marques, F. M., Angelique, J. C., Axelsson, L., Benoit, B., Bergmann, U. C., Borge, M. J. G., Catford, W. N., Chappell, S. P. G., Clarke, N. M., Costa, G., Curtis, N., D'Arrigo, A., Brennand, E. de Goes, Dorvaux, O., Fazio, G., Freer, M., Fulton, B. R., Giardina, G., Grevy, S., Guillemaud-Mueller, D., Hanappe, F., Jones, B. Heusch K. L., Jonson, B., Brun, C. Le, Leenhardt, S., Lewitowicz, M., Lopez, M. J., Markenroth, K., Mueller, A. C., Nilsson, T., Ninane, A., Nyman, G., de Oliveira, F., Piqueras, I., Riisager, K., Laurent, M. G. Saint, Sarazin, F., Singer, S. M., Sorlin, O., and Stuttge, L.

Subjects
Nuclear Experiment
Abstract

The two-neutron halo nucleus 14Be has been investigated in a kinematically complete measurement of the fragments (12Be and neutrons) produced in dissociation at 35 MeV/nucleon on C and Pb targets. Two-neutron removal cross-sections, neutron angular distributions and invariant mass spectra characteristic of a halo were observed and the electromagnetic (EMD) contributions deduced. Comparison with three-body model predictions indicate that the halo wavefunction contains a large 2s1/2^2 admixture. The EMD invariant mass spectrum exhibited a relatively narrow structure near threshold (Edecay=1.8+/-0.1 MeV, Gamma = 0.8+/-0.4 MeV) consistent with a soft-dipole excitation., Comment: 17 pages, 3 figures

Published
2000

16. Universality of Spectator Fragmentation at Relativistic Bombarding Energies

Author

Schuettauf, A., Kunze, W. D., Woerner, A., Begemann-Blaich, M., Blaich, Th., Bowman, D. R., Charity, R. J., Cosmo, A., Ferrero, A., Gelbke, C. K., Gross, C., Hsi, W. C., Hubele, J., Imme, G., Iori, I., Kreutz, P., Kunde, G. J., Lindenstruth, V., Lisa, M. A., Lynch, W. G., Lynen, U., Mang, M., Moehlenkamp, T., Moroni, A., Mueller, W. F. J., Neumann, M., Ocker, B., Ogilvie, C. A., Peaslee, G. F., Pochodzalla, J., Raciti, G., Rubehn, Th., Sann, H., Schwarz, C., Seidel, W., Serfling, V., Sobotka, L. G., Stroth, J., Stuttge, L., Tomasevic, S., Trautmann, W., Trzcinski, A., Tsang, M. B., Tucholski, A., Verde, G., Williams, C. W., Zude, E., and Zwieglinski, B.

Subjects
Nuclear Experiment
Abstract

Multi-fragment decays of 129Xe, 197Au, and 238U projectiles in collisions with Be, C, Al, Cu, In, Au, and U targets at energies between E/A = 400 MeV and 1000 MeV have been studied with the ALADIN forward-spectrometer at SIS. By adding an array of 84 Si-CsI(Tl) telescopes the solid-angle coverage of the setup was extended to \theta_lab = 16 degree. This permitted the complete detection of fragments from the projectile-spectator source. The dominant feature of the systematic set of data is the Z_bound universality that is obeyed by the fragment multiplicities and correlations. These observables are invariant with respect to the entrance channel if plotted as a function of Z_bound, where Z_bound is the sum of the atomic numbers Z_i of all projectile fragments with Z_i \geq 2. No significant dependence on the bombarding energy nor on the target mass is observed. The dependence of the fragment multiplicity on the projectile mass follows a linear scaling law. The reasons for and the limits of the observed universality of spectator fragmentation are explored within the realm of the available data and with model studies. It is found that the universal properties should persist up to much higher bombarding energies than explored in this work and that they are consistent with universal features exhibited by the intranuclear cascade and statistical multifragmentation models. PACS numbers: 25.70.Mn, 25.70.Pq, 25.75.-q, Comment: Plain Tex, 49 pages including 20 eps figures. Also available from http://www-kp3.gsi.de/www/kp3/aladin_publications.html

Published
1996
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18. FIRST experiment: Fragmentation of ions relevant for space and therapy

Author

Agodi, C, Abou Haidar, Z, Alvarez, M, Aumann, T, Balestra, F, Battistoni, G, Bocci, A, Bohlen, T, Bondi, M, Boudard, A, Brunetti, A, Carpinelli, M, Cappuzzello, F, Cavallaro, M, Carbone, D, Cirrone, G, Cortes Giraldo, M, Cuttone, G, De Napoli, M, Durante, M, Fernandez Garcia, J, Finck, C, Foti, A, Gallardo, M, Golosio, B, Iarocci, E, Iazzi, F, Ickert, G, Introzzi, R, Juliani, D, Krimmer, J, Kurz, N, Labalme, M, Lavagno, A, Leifels, Y, Le Fevre, A, Leray, S, Marchetto, F, Monaco, V, Morone, M, Nicolosi, D, Oliva, P, Paoloni, A, Patera, V, Piersanti, L, Pleskac, R, Quesada, J, Randazzo, N, Romano, F, Rossi, D, Rosso, V, Rousseau, M, Sacchi, R, Sala, P, Sarti, A, Scheidenberger, C, Schuy, C, Sciubba, A, Sfienti, C, Simon, H, Sipala, V, Spiriti, E, Stuttge, L, Tropea, S, Younis, H, Agodi C, Abou Haidar Z, Alvarez MAG, Aumann T, Balestra F, Battistoni G, Bocci A, Bohlen TT, Bondi M, Boudard A, BRUNETTI, Antonio, CARPINELLI, Massimo, Cappuzzello F, Cavallaro M, Carbone D, Cirrone GAP, Cortes Giraldo MA, Cuttone G, De Napoli M, Durante M, Fernandez Garcia JP, Finck C, Foti A, Gallardo MI, GOLOSIO, Bruno, Iarocci E, Iazzi F, Ickert G, Introzzi R, Juliani D, Krimmer J, Kurz N, Labalme M, Lavagno A, Leifels Y, Le Fevre A, Leray S, Marchetto F, Monaco V, Morone MC, Nicolosi D, OLIVA, Piernicola, Paoloni A, Patera V, Piersanti L, Pleskac R, Quesada JM, Randazzo N, Romano F, Rossi D, Rosso V, Rousseau M, Sacchi R, Sala P, Sarti A, Scheidenberger C, Schuy C, Sciubba A, Sfienti C, Simon H, SIPALA, Valeria, Spiriti E, Stuttge L, Tropea S, Younis H., Agodi, C, Abou Haidar, Z, Alvarez, M, Aumann, T, Balestra, F, Battistoni, G, Bocci, A, Bohlen, T, Bondi, M, Boudard, A, Brunetti, A, Carpinelli, M, Cappuzzello, F, Cavallaro, M, Carbone, D, Cirrone, G, Cortes Giraldo, M, Cuttone, G, De Napoli, M, Durante, M, Fernandez Garcia, J, Finck, C, Foti, A, Gallardo, M, Golosio, B, Iarocci, E, Iazzi, F, Ickert, G, Introzzi, R, Juliani, D, Krimmer, J, Kurz, N, Labalme, M, Lavagno, A, Leifels, Y, Le Fevre, A, Leray, S, Marchetto, F, Monaco, V, Morone, M, Nicolosi, D, Oliva, P, Paoloni, A, Patera, V, Piersanti, L, Pleskac, R, Quesada, J, Randazzo, N, Romano, F, Rossi, D, Rosso, V, Rousseau, M, Sacchi, R, Sala, P, Sarti, A, Scheidenberger, C, Schuy, C, Sciubba, A, Sfienti, C, Simon, H, Sipala, V, Spiriti, E, Stuttge, L, Tropea, S, Younis, H, Agodi C, Abou Haidar Z, Alvarez MAG, Aumann T, Balestra F, Battistoni G, Bocci A, Bohlen TT, Bondi M, Boudard A, BRUNETTI, Antonio, CARPINELLI, Massimo, Cappuzzello F, Cavallaro M, Carbone D, Cirrone GAP, Cortes Giraldo MA, Cuttone G, De Napoli M, Durante M, Fernandez Garcia JP, Finck C, Foti A, Gallardo MI, GOLOSIO, Bruno, Iarocci E, Iazzi F, Ickert G, Introzzi R, Juliani D, Krimmer J, Kurz N, Labalme M, Lavagno A, Leifels Y, Le Fevre A, Leray S, Marchetto F, Monaco V, Morone MC, Nicolosi D, OLIVA, Piernicola, Paoloni A, Patera V, Piersanti L, Pleskac R, Quesada JM, Randazzo N, Romano F, Rossi D, Rosso V, Rousseau M, Sacchi R, Sala P, Sarti A, Scheidenberger C, Schuy C, Sciubba A, Sfienti C, Simon H, SIPALA, Valeria, Spiriti E, Stuttge L, Tropea S, and Younis H.

Abstract

Nuclear fragmentation processes are relevant in different fields of basic research and applied physics and are of particular interest for tumor therapy and for space radiation protection applications. The FIRST (Fragmentation of Ions Relevant for Space and Therapy) experiment at SIS accelerator of GSI laboratory in Darmstadt, has been designed for the measurement of different ions fragmentation cross sections at different energies between 100 and 1000 MeV/nucleon. The experiment is performed by an international collaboration made of institutions from Germany, France, Italy and Spain. The experimental apparatus is partly based on an already existing setup made of the ALADIN magnet, the MUSIC IV TPC, the LAND2 neutron detector and the TOFWALL scintillator TOF system, integrated with newly designed detectors in the interaction Region (IR) around the carbon removable target: a scintillator Start Counter, a Beam Monitor drift chamber, a silicon Vertex Detector and a Proton Tagger for detection of light fragments emitted at large angles (KENTROS). The scientific program of the FIRST experiment started on summer 2011 with the study of the 400 MeV/nucleon 12C beam fragmentation on thin (8mm) carbon target.

Published
2013

19. The FIRST experiment at GSI: Detector performances with a 400 MeV/u 12C beam

Author

Abou Haidar, Z, Agodi, C, Alvarez, M, Aumann, T, Balestra, F, Battistoni, G, Bocci, A, Böhlen, T, Boudard, A, Brunetti, A, Carpinelli, M, Cirrone, G, Cortés Giraldo, M, Cuttone, G, De Napoli, M, Durante, M, Fernández García, J, Finck, C, Gallardo, M, Golosio, B, Iarocci, E, Iazzi, F, Ickert, G, Introzzi, R, Juliani, ., Krimmer, J, Kurz, N, Labalme, M, Lavagno, A, Leifels, Y, Le Févre, A, Leray, S, Marchetto, F, Monaco, V, Morone, M, Nicolosi, D, Oliva, P, Paoloni, A, Patera, V, Piersanti, L, Pleskac, R, Quesada, J, Randazzo, N, Romano, F, Rossi, D, Rosso, V, Rousseau, M, Sacchi, R, Sala, P, Sarti, A, Scheidenberger, C, Schuy, C, Sciubba, A, Sfienti, C, Simon, H, Sipala, V, Spiriti, E, Stuttge, L, Tropea, S, Younis, H, Abou Haidar Z, Agodi C, Alvarez M. A. G, Aumann T, Balestra F, Battistoni G, Bocci A, Böhlen T. T, Boudard A, BRUNETTI, Antonio, CARPINELLI, Massimo, Cirrone G. A. P., Cortés Giraldo M. A, Cuttone G, De Napoli M, Durante M, Fernández García J. P, Finck C, Gallardo M. I, GOLOSIO, Bruno, Iarocci E, Iazzi F, Ickert G, Introzzi R, Juliani ., Krimmer J., Kurz N., Labalme M., Lavagno A., Leifels Y., Le Févre A., Leray S., Marchetto F., Monaco V., Morone M. C., Nicolosi D., OLIVA, Piernicola, Paoloni A., Patera V., Piersanti L., Pleskac R., Quesada J. M., Randazzo N., Romano F., Rossi D., Rosso V., Rousseau M., Sacchi R., Sala P., Sarti A., Scheidenberger C., Schuy C., Sciubba A., Sfienti C., Simon H., SIPALA, Valeria, Spiriti E., Stuttge L., Tropea S., Younis H., Abou Haidar, Z, Agodi, C, Alvarez, M, Aumann, T, Balestra, F, Battistoni, G, Bocci, A, Böhlen, T, Boudard, A, Brunetti, A, Carpinelli, M, Cirrone, G, Cortés Giraldo, M, Cuttone, G, De Napoli, M, Durante, M, Fernández García, J, Finck, C, Gallardo, M, Golosio, B, Iarocci, E, Iazzi, F, Ickert, G, Introzzi, R, Juliani, ., Krimmer, J, Kurz, N, Labalme, M, Lavagno, A, Leifels, Y, Le Févre, A, Leray, S, Marchetto, F, Monaco, V, Morone, M, Nicolosi, D, Oliva, P, Paoloni, A, Patera, V, Piersanti, L, Pleskac, R, Quesada, J, Randazzo, N, Romano, F, Rossi, D, Rosso, V, Rousseau, M, Sacchi, R, Sala, P, Sarti, A, Scheidenberger, C, Schuy, C, Sciubba, A, Sfienti, C, Simon, H, Sipala, V, Spiriti, E, Stuttge, L, Tropea, S, Younis, H, Abou Haidar Z, Agodi C, Alvarez M. A. G, Aumann T, Balestra F, Battistoni G, Bocci A, Böhlen T. T, Boudard A, BRUNETTI, Antonio, CARPINELLI, Massimo, Cirrone G. A. P., Cortés Giraldo M. A, Cuttone G, De Napoli M, Durante M, Fernández García J. P, Finck C, Gallardo M. I, GOLOSIO, Bruno, Iarocci E, Iazzi F, Ickert G, Introzzi R, Juliani ., Krimmer J., Kurz N., Labalme M., Lavagno A., Leifels Y., Le Févre A., Leray S., Marchetto F., Monaco V., Morone M. C., Nicolosi D., OLIVA, Piernicola, Paoloni A., Patera V., Piersanti L., Pleskac R., Quesada J. M., Randazzo N., Romano F., Rossi D., Rosso V., Rousseau M., Sacchi R., Sala P., Sarti A., Scheidenberger C., Schuy C., Sciubba A., Sfienti C., Simon H., SIPALA, Valeria, Spiriti E., Stuttge L., Tropea S., and Younis H.

Abstract

FIRST (Fragmentation of Ions Relevant for Space and Therapy) is an experiment aimed at the measurement of double-differential cross sections, with respect to kinetic energy and scattering polar angle, of nuclear fragmentation processes in the energy range between 100 and 1000 MeV/u. The experiment was performed with the SIS accelerator at GSI (Darmstadt, Germany). During August 2011 a first set of data was collected using a 400 MeV/u 12C ion beam on carbon and gold targets. We present a description of the experimental apparatus and some preliminary results from the data acquisition and from the data analysis.

Published
2013

20. Experiment FIRST: Fragmentation of 12C beam at 400 MeV/u

Author

Introzzi, R, Abou Haidar, Z, Agodi, C, Alvarez, M, Aumann, T, Balestra, F, Battistoni, G, Bocci, A, Böhlen, T, Boudard, A, Brunetti, A, Carpinelli, M, Cirrone, G, Cortés Giraldo, M, Cuttone, G, De Napoli, M, Durante, M, Fernández Garcia, J, Finck, C, Golosio, B, Iarocci, E, Iazzi, F, Ickert, G, Juliani, D, Krimmer, J, Kummali, A, Kurz, N, Labalme, M, Lavagno, A, Leifels, Y, Le Févre, A, Leray, S, Liu, B, Marchetto, F, Monaco, V, Morone, M, Nicolosi, D, Oliva, P, Paoloni, A, Patera, V, Piersanti, L, Pleskac, R, Randazzo, N, Romano, F, Rossi, D, Rosso, V, Rousseau, M, Sacchi, R, Sala, P, Samuel, S, Sarti, A, Scheidenberger, C, Schuy, C, Sciubba, A, Sfienti, C, Simon, H, Sipala, V, Spiriti, E, Stuttge, L, Toppi, M, Tropea, S, Younis, H, Introzzi, R., Abou Haidar, Z., Agodi, C., Alvarez, M. A. G., Aumann, T., Balestra, F., Battistoni, G., Bocci, A., Böhlen, T. T., Boudard, A., BRUNETTI, Antonio, CARPINELLI, Massimo, Cirrone, G. A. P., Cortés Giraldo, M. A., Cuttone, G., De Napoli, M., Durante, M., Fernández Garcia, J. P., Finck, C., Golosio, B., Iarocci, E., Iazzi, F., Ickert, G., Juliani, D., Krimmer, J., Kummali, A. H., Kurz, N., Labalme, M., Lavagno, A., Leifels, Y., Le Févre, A., Leray, S., Liu, B., Marchetto, F., Monaco, V., Morone, M. C., Nicolosi, D., OLIVA, Piernicola, Paoloni, A., Patera, V., Piersanti, L., Pleskac, R., Randazzo, N., Romano, F., Rossi, D., Rosso, V., Rousseau, M., Sacchi, R., Sala, P., Samuel, S., Sarti, A., Scheidenberger, C., Schuy, C., Sciubba, A., Sfienti, C., Simon, H., SIPALA, Valeria, Spiriti, E., Stuttge, L., Toppi, M., Tropea, S., Younis, H., Introzzi, R, Abou Haidar, Z, Agodi, C, Alvarez, M, Aumann, T, Balestra, F, Battistoni, G, Bocci, A, Böhlen, T, Boudard, A, Brunetti, A, Carpinelli, M, Cirrone, G, Cortés Giraldo, M, Cuttone, G, De Napoli, M, Durante, M, Fernández Garcia, J, Finck, C, Golosio, B, Iarocci, E, Iazzi, F, Ickert, G, Juliani, D, Krimmer, J, Kummali, A, Kurz, N, Labalme, M, Lavagno, A, Leifels, Y, Le Févre, A, Leray, S, Liu, B, Marchetto, F, Monaco, V, Morone, M, Nicolosi, D, Oliva, P, Paoloni, A, Patera, V, Piersanti, L, Pleskac, R, Randazzo, N, Romano, F, Rossi, D, Rosso, V, Rousseau, M, Sacchi, R, Sala, P, Samuel, S, Sarti, A, Scheidenberger, C, Schuy, C, Sciubba, A, Sfienti, C, Simon, H, Sipala, V, Spiriti, E, Stuttge, L, Toppi, M, Tropea, S, Younis, H, Introzzi, R., Abou Haidar, Z., Agodi, C., Alvarez, M. A. G., Aumann, T., Balestra, F., Battistoni, G., Bocci, A., Böhlen, T. T., Boudard, A., BRUNETTI, Antonio, CARPINELLI, Massimo, Cirrone, G. A. P., Cortés Giraldo, M. A., Cuttone, G., De Napoli, M., Durante, M., Fernández Garcia, J. P., Finck, C., Golosio, B., Iarocci, E., Iazzi, F., Ickert, G., Juliani, D., Krimmer, J., Kummali, A. H., Kurz, N., Labalme, M., Lavagno, A., Leifels, Y., Le Févre, A., Leray, S., Liu, B., Marchetto, F., Monaco, V., Morone, M. C., Nicolosi, D., OLIVA, Piernicola, Paoloni, A., Patera, V., Piersanti, L., Pleskac, R., Randazzo, N., Romano, F., Rossi, D., Rosso, V., Rousseau, M., Sacchi, R., Sala, P., Samuel, S., Sarti, A., Scheidenberger, C., Schuy, C., Sciubba, A., Sfienti, C., Simon, H., SIPALA, Valeria, Spiriti, E., Stuttge, L., Toppi, M., Tropea, S., and Younis, H.

Abstract

The knowledge about fragmentation processes in ion-ion interactions is fundamental in hadrontherapy and radiation protection in space missions. Hadrontherapy, based on 12C, features many advantages with respect to conventional radiation therapy with photons due to the possibility to shape the dose delivery region in tissues but side effects of the projectile fragmentation in healthy tissues are not negligible. NASA recently pointed out that measurements for some light ions and kinetic energies are missing in nuclear fragmentation databases. FIRST experiment aims to measure the fragmentation doubledifferential cross section of 12C in the energy range 100-1000 MeV/u on several elements, constituents of organic tissues and electronic devices, in order to fill some of the mentioned lack of information on light ions. A first set of data has been taken in 2011 at GSI (Darmstadt), using 12C beam at 400 MeV/u on C and Au targets. About 3·107 events with C target and 5 × 106 with Au target were recorded. Together with these data other sets of runs have been collected to calibrate the forward part of the whole experimental setup, the ToF-Wall. The calibration procedure and the detector performances, which fit the experiment requirements for what concerns efficiency, resolution and stability, will be illustrated. Moreover, some preliminary results concerning the 12C-12C elastic scattering, in agreement with the Rutherford model, will be presented.

Published
2013

21. The FIRST experiment for nuclear fragmentation measurements at GSI

Author

Golosio, B, Abou Haidar, Z, Agodi, C, Alvarez, M, Aumann, T, Battistoni, G, Bocci, A, Böhlen, T, Boudard, A, Brunetti, A, Carpinelli, M, Cirrone, G, Cortes Giraldo, M, Cuttone, G, De Napoli, M, Durante, M, Finck, C, Hannan, Y, Iarocci, E, Iazzi, F, Ickert, G, Introzzi, R, Juliani, D, Krimmer, J, Kurz, N, Labalme, M, Leifels, I, Le Fevre, A, Leray, S, Marchetto, F, Masala, G, Monaco, V, Morone, M, Oliva, P, Paoloni, A, Patera, V, Piersanti, L, Pleskac, R, Quesada, J, Randazzo, N, Romano, F, Rossi, D, Rousseau, M, Sacchi, R, Sala, P, Sarti, A, Scheidenberger, C, Schuy, C, Sciubba, A, Sfienti, C, Simon, H, Sipala, V, Spiriti, E, Stuttge, L, Tropea, S, GOLOSIO, Bruno, Abou Haidar, Z., Agodi, C., Alvarez, M. A. G., Aumann, T., Battistoni, G., Bocci, A., Böhlen, T. T., Boudard, A., BRUNETTI, Antonio, CARPINELLI, Massimo, Cirrone, G. A. P., Cortes Giraldo, M. A., Cuttone, G., De Napoli, M., Durante, M., Finck, C., Hannan, Y., Iarocci, E., Iazzi, F., Ickert, G., Introzzi, R., Juliani, D., Krimmer, J., Kurz, N., Labalme, M., Leifels, I., Le Fevre, A., Leray, S., Marchetto, F., Masala, G. L., Monaco, V., Morone, M. C., OLIVA, Piernicola, Paoloni, A., Patera, V., Piersanti, L., Pleskac, R., Quesada, J. M., Randazzo, N., Romano, F., Rossi, D., Rousseau, M., Sacchi, R., Sala, P., Sarti, A., Scheidenberger, C., Schuy, C., Sciubba, A., Sfienti, C., Simon, H., SIPALA, Valeria, Spiriti, E., Stuttge, L., Tropea, S., Golosio, B, Abou Haidar, Z, Agodi, C, Alvarez, M, Aumann, T, Battistoni, G, Bocci, A, Böhlen, T, Boudard, A, Brunetti, A, Carpinelli, M, Cirrone, G, Cortes Giraldo, M, Cuttone, G, De Napoli, M, Durante, M, Finck, C, Hannan, Y, Iarocci, E, Iazzi, F, Ickert, G, Introzzi, R, Juliani, D, Krimmer, J, Kurz, N, Labalme, M, Leifels, I, Le Fevre, A, Leray, S, Marchetto, F, Masala, G, Monaco, V, Morone, M, Oliva, P, Paoloni, A, Patera, V, Piersanti, L, Pleskac, R, Quesada, J, Randazzo, N, Romano, F, Rossi, D, Rousseau, M, Sacchi, R, Sala, P, Sarti, A, Scheidenberger, C, Schuy, C, Sciubba, A, Sfienti, C, Simon, H, Sipala, V, Spiriti, E, Stuttge, L, Tropea, S, GOLOSIO, Bruno, Abou Haidar, Z., Agodi, C., Alvarez, M. A. G., Aumann, T., Battistoni, G., Bocci, A., Böhlen, T. T., Boudard, A., BRUNETTI, Antonio, CARPINELLI, Massimo, Cirrone, G. A. P., Cortes Giraldo, M. A., Cuttone, G., De Napoli, M., Durante, M., Finck, C., Hannan, Y., Iarocci, E., Iazzi, F., Ickert, G., Introzzi, R., Juliani, D., Krimmer, J., Kurz, N., Labalme, M., Leifels, I., Le Fevre, A., Leray, S., Marchetto, F., Masala, G. L., Monaco, V., Morone, M. C., OLIVA, Piernicola, Paoloni, A., Patera, V., Piersanti, L., Pleskac, R., Quesada, J. M., Randazzo, N., Romano, F., Rossi, D., Rousseau, M., Sacchi, R., Sala, P., Sarti, A., Scheidenberger, C., Schuy, C., Sciubba, A., Sfienti, C., Simon, H., SIPALA, Valeria, Spiriti, E., Stuttge, L., and Tropea, S.

Abstract

Nuclear fragmentation processes are relevant in different fields of physics concerning both basic research and applications. FIRST (Fragmentation of Ions Relevant for Space and Therapy) is an experiment aimed at the measurement of double differential cross sections (DDCS), with respect to kinetic energy and scattering polar angle, of nuclear fragmentation processes relevant for hadron therapy and for space radiation protection applications, in the energy range between 100 and 1000 MeV/u. The experiment was mounted at the GSI laboratories of Darmstadt, in Germany. A first data taking was performed in August 2011, using 400 MeV/u 12C on carbon and gold targets. In this work we present a description of the experimental apparatus and some figures from the data acquisition and from the preliminary work on data analysis.

Published
2012

22. $^{12}$C nuclear reaction measurements for hadrontherapy

Author

B. Braunn, B, M. Labalme, M, G. Ban, G, J.Colin, J, D. Cussol, D, J.M. Fontbonne, J M, F.R.. Lecolley, F R, C. Pautard, C, Haas, F, Lebhertz, D, Rousseau, M, Stuttge, L, Chevallier, M, Dauvergne, D, Le Foulher, F, Ray, C, Testa, E, Testa, M, and Salsac, M D

Subjects
XX
Abstract

Hadrontherapy treatments require a very high precision on the dose deposition ( 2.5% and 1-2mm) in order to keep the benefits of the precise ions’ ballistic. The largest uncertainty on the physical dose deposition is due to ion fragmentation. Up to now, the simulation codes are not able to reproduce the fragmentation process with the required precision. To constraint the nuclear models and complete fragmentation cross sections databases; our collaboration has performed an experiment on May 2008 at GANIL with a 95 MeV/u 12C beam. We have measured the fluence, energy and angular distributions of charged fragments and neutrons coming from nuclear reactions of incident 12C on thick water-like PMMA targets. Preliminary comparisons between GEANT4 (G4BinaryLightIonReaction) simulations and experimental data show huge discrepancies.

Published
2010

23. 12C nuclear reaction measurements for hadrontherapy

Author

Braunn, B., Labalme, M., Ban, G., Cussol, D., Fontbonne, J.M., Lecolley, F.R., Pautard, C., Haas, F., Lebhertz, D., Rousseau, Marc, Stuttge, L., Chevallier, M., Dauvergne, D., Le Foulher, F., Ray, C., Testa, E., Testa, M., Salsac, M.D., 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), Institut Pluridisciplinaire Hubert Curien (IPHC), Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), CAS-PHABIO, Institut de Physique Nucléaire de Lyon (IPNL), 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)-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)-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, F. Cerutti, A. Ferrari, Normandie Université (NU)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Université de Strasbourg (UNISTRA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), 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), and Guesnon, Sandrine

Subjects
[PHYS.PHYS.PHYS-MED-PH] Physics [physics]/Physics [physics]/Medical Physics [physics.med-ph], [PHYS.NEXP] Physics [physics]/Nuclear Experiment [nucl-ex], [PHYS.PHYS.PHYS-MED-PH]Physics [physics]/Physics [physics]/Medical Physics [physics.med-ph], [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex]
Abstract

International audience; Hadrontherapy treatments require a very high precision on the dose deposition ( 2.5% and 1-2mm) in order to keep the benefits of the precise ions' ballistic. The largest uncertainty on the physical dose deposition is due to ion fragmentation. Up to now, the simulation codes are not able to reproduce the fragmentation process with the required precision. To constraint the nuclear models and complete fragmentation cross sections databases; our collaboration has performed an experiment on May 2008 at GANIL with a 95 MeV/u 12C beam. We have measured the fluence, energy and angular distributions of charged fragments and neutrons coming from nuclear reactions of incident 12C on thick water-like PMMA targets. Preliminary comparisons between GEANT4 (G4BinaryLightIonReaction) simulations and experimental data show huge discrepancies.

Published
2009

24. B(E1) Strengths from Coulomb Excitation of $^{11}$Be

Author

Summers, N. C., Pain, S. D., Orr, N. A., Catford, W. N., Angelique, J. C., Ashwood, N. I., Bouchat, V., Clarke, N. M., Curtis, N., Freer, M., Fulton, B. R., Hanappe, F., Labiche, M., Lecouey, J. L., Lemmon, R. C., Mahboub, D., Ninane, A., Normand, G., Nunes, F. M., Soic, N., Stuttge, L., Timis, C. N., Thompson, I. J., Winfield, J. S., Ziman, V., 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), Département Recherches Subatomiques (DRS-IPHC), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Louis Pasteur - Strasbourg I-Centre National de la Recherche Scientifique (CNRS), and Normandie Université (NU)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)

Subjects
Nuclear Theory (nucl-th), Coulomb excitation, extended continuum discretized coupled channels method, 11Be, Nuclear Theory, [PHYS.NUCL]Physics [physics]/Nuclear Theory [nucl-th], FOS: Physical sciences, Nuclear Experiment
Abstract

The $B$(E1;$1/2^+\to1/2^-$) strength for $^{11}$Be has been extracted from intermediate energy Coulomb excitation measurements, over a range of beam energies using a new reaction model, the extended continuum discretized coupled channels (XCDCC) method. In addition, a measurement of the excitation cross section for $^{11}$Be+$^{208}$Pb at 38.6 MeV/nucleon is reported. The $B$(E1) strength of 0.105(12) e$^2$fm$^2$ derived from this measurement is consistent with those made previously at 60 and 64 MeV/nucleon, i n contrast to an anomalously low result obtained at 43 MeV/nucleon. By coupling a multi-configuration description of the projectile structure with realistic reaction theory, the XCDCC model provides for the first time a fully quantum mechanical description of Coulomb excitation. The XCDCC calculations reveal that the excitation process involves significant contributions from nuclear, continuum, and higher-order effects. An analysis of the present and two earlier intermediate energy measurements yields a combined B(E1) strength of 0.105(7) e$^2$fm$^2$. This value is in good agreement with the value deduced independently from the lifetime of the $1/2^-$ state in $^{11}$Be, and has a comparable p recision., Comment: 5 pages, 2 figures, accepted for publication in Phys. Lett. B

Published
2007

25. Structure of Be-12: Intruder d-wave strength at N=8

Author

Pain, SD, Catford, WN, Orr, NA, Angelique, JC, Ashwood, NI, Bouchat, V, Clarke, NM, Curtis, N, Freer, M, Fulton, BR, Hanappe, F, Labiche, M, Lecouey, JL, Lemmon, RC, Mahboub, D, Ninane, A, Normand, G, Soic, N, Stuttge, L, Timis, CN, Tostevin, JA, Winfield, JS, Ziman, V, and UCL

Subjects
Nuclear Experiment
Abstract

The breaking of the N=8 shell-model magic number in the 12Be ground state has been determined to include significant occupancy of the intruder d-wave orbital. This is in marked contrast with all other N=8 isotones, both more and less exotic than 12Be. The occupancies of the 0 hbar omega neutron p1/2-orbital and the 1 hbar omega, neutron d5/2 intruder orbital were deduced from a measurement of neutron removal from a high-energy 12Be beam leading to bound and unbound states in 11Be. Comment: 5 pages, 2 figures

Published
2006

26. The Scientific Objectives of the SPIRAL2 project

Author

Ackermann, D., Adoui, L., Angelis, G., Auger, G., Aumann, T., Azaiez, F., Balanzat, E., Baldacchino, G., Barthe, M. F., Bauge, E., Bem, P., Bender, M., Bennaceur, K., F Berger, J., Bertram Blank, Blomqvist, J., Blumenfeld, Y., Boucard, S., Bouffard, S., Bracco, A., Calabrese, R., Cederwall, B., Cee, R., Chomaz, P., Colo, G., Colonna, M., Curien, D., Danielewicz, P., Dayras, R., Oliveira, F., Di Toro, M., Diegele, E., Dobaczewski, J., Ethvignot, T., Fischer, U., France, G., Freer, M., Garg, U., Gelletly, W., Gillibert, A., Girod, M., Goriely, S., Goutte, H., Grandin, J. P., Gunsing, F., Heenen, P. H., Heil, M., Heyde, K., Hilaire, S., Hofmann, S., Indelicato, P., Janas, Z., Jokinen, A., Jose, J., Kaeppeler, F., Khan, E., Jürgen Knödlseder, Krasznahorkay, A., Kratz, K. L., Emily Lamour, Langanke, K., Lapoux, V., Le Bigot, E. O., Le Blanc, F., Ledoux, X., Leino, M., Lenzi, S., Leoni, S., Lewitowicz, M., Lunney, D., Maglione, E., Maj, A., Mantica, P., Marques, J., Matsuo, M., Méot, V., Mittig, W., Morse, E. C., Naviliat-Cuncic, O., Nazarewicz, W., Neyens, G., Novikov, Y., Oberstedt, S., Otsuka, T., Parente, F., Péru, S., Pillet, N., Plompen, A., Christophe Prigent, Reifarth, R., Ridikas, D., Rivet, M. F., Roeckl, E., Marc Rousseau, Roussel-Chomaz, P., Rozet, J. P., Rudolf, G., Rykaczewski, K., Saint-Laurent, M. G., Santonocito, D., P Santos, J., Sapienza, P., Savajols, H., Schädel, M., Schatz, H., Severijns, N., Sida, J. L., Sobrio, F., Sorlin, O., Stefanini, A. M., Stodel, C., Stuttge, L., Testard, I., Ch. Theisen, Thomas, J. C., Thomas, J. B., Thompson, I., Toulemonde, M., Isacker, P., Verney, D., Dominique Curien, Vieira, D., Villari, A. C. C., Volpe, C., Vretenar, D., Warner, D., Wieleczko, J. P., Wörtche, J. H., Wyss, R., 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), 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), Département Recherches Subatomiques (DRS-IPHC), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Louis Pasteur - Strasbourg I-Centre National de la Recherche Scientifique (CNRS), Centre de Spectrométrie Nucléaire et de Spectrométrie de Masse (CSNSM), 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), GANIL, SPIRAL2, 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), 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), 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), and Normandie Université (NU)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)

Subjects
endocrine system, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], hormones, hormone substitutes, and hormone antagonists
Abstract

PTH NESTER NIM; No abstract

Published
2006

27. Elements discrimination in the study of super-heavy elements using an ionization chamber

Author

FULIS Collaboration, Wieloch, A., Sosin, Z., Peter, J., Lojek, K., Alamanos, N., Amar, N., Anne, R., Angelique, J. C., Auger, G., Dayras, R., Drouart, A., Fontbonne, J. M., Gillibert, A., Grevy, S., Hanappe, F., Hannachi, F., Hue, R., Khouaja, A., Legou, T., Lopez-Martens, A., Lienard, E., Manduci, L., Santos, F. de Oliveira, Politi, G., Saint-Laurent, M. G., Stodel, C., Stuttge, L., Tillier, J., de Tourreil, R., Villari, A. C. C., Wieleczko, J. P., 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), 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), Centre de Spectrométrie Nucléaire et de Spectrométrie de Masse (CSNSM), 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 Subatomiques (IReS), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Cancéropôle du Grand Est-Université Louis Pasteur - Strasbourg I-Centre National de la Recherche Scientifique (CNRS), FULIS, Normandie Université (NU)-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 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 and High Energy Physics, SHE, Physics::Instrumentation and Detectors, Nuclear Theory, FOS: Physical sciences, Transactinide element, Heavy ion detection, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 01 natural sciences, Signal, Effective nuclear charge, Nuclear physics, 0103 physical sciences, Nuclear fusion, Nuclear Experiment (nucl-ex), Nuclear Experiment, 010306 general physics, Instrumentation, Physics, Inverse kinematics, 010308 nuclear & particles physics, Detector, 25.70, 25.75, 25.70.Gh, 29.40.C, Ionization chamber, Atomic physics, Beam (structure)
Abstract

Dedicated ionization chamber was built and installed to measure the energy loss of very heavy nuclei at 2.7 MeV/u produced in fusion reactions in inverse kinematics (beam of 208Pb). After going through the ionization chamber, products of reactions on 12C, 18O targets are implanted in a Si detector. Their identification through their alpha decay chain is ambiguous when their half-life is short. After calibration with Pb and Th nuclei, the ionization chamber signal allowed us to resolve these ambiguities. In the search for rare super-heavy nuclei produced in fusion reactions in inverse or symmetric kinematics, such a chamber will provide direct information on the nuclear charge of each implanted nucleus., submitted to NIMA, 10 pages+4 figures, Latex, uses elsart.cls and grahpicx

Published
2004

28. Influence of the Coulomb field on charged particle emission in Ar + Ni reaction at 77 MeV/u

Author

Wosińska, K., Pluta, J., Hanappe, F., Stuttge, L., Angelique, J. C., Basrak, Z., Benoit, B., Goes Brennand, E., Bizard, G., Colin, J., Costa, G., Desesquelles, P., Olivier Dorvaux, Durand, D., Erazmus, B., Kuleshov, S., Lednicky, R., Leszczyński, P., Marques, M., Materna, Th, Mikhailov, K., Papatheofanous, G., Pawlak, T., Przewłocki, M., Staranowicz, A., Stavinskiy, A., Sztenkiel, A., Tamain, B., Vlasov, A., Vorobyev, L., Institut de Recherches Subatomiques (IReS), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Cancéropôle du Grand Est-Université Louis Pasteur - Strasbourg I-Centre National de la Recherche Scientifique (CNRS), 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), Laboratoire de Physique Subatomique et de Cosmologie (LPSC), Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Institut Polytechnique de Grenoble - Grenoble Institute of Technology-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA), Laboratoire SUBATECH Nantes (SUBATECH), 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 Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Institut Polytechnique de Grenoble - Grenoble Institute of Technology-Centre National de la Recherche Scientifique (CNRS), Heyd, Yvette, Normandie Université (NU)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut Polytechnique de Grenoble - Grenoble Institute of Technology-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Joseph Fourier - Grenoble 1 (UJF)-Centre National de la Recherche Scientifique (CNRS), and 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)

Subjects
[PHYS.NEXP] Physics [physics]/Nuclear Experiment [nucl-ex], Astrophysics::High Energy Astrophysical Phenomena, Nuclear Theory, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], Nuclear Experiment
Abstract

Ar+Ni collisions at 77 MeV/u were studied in the experiment E286 performed at GANIL. An important advantage of this experiment was an application of the neutron detector DEMON for registration of both neutral and charged particles. This feature allows to compare characteristics of neutrons and protons detected by the same detector and gives a possibility to determine the influence of the Coulomb field on the proton emission. Estimation of a charge of the emitting source was performed by comparing energy spectra of neutrons and protons detected under identical experimental conditions. The experimental results were compared with the prediction of the SIMON model.

Published
2003

29. Parameters of emitting sources in Ar-Ni reaction at 77 MeV/u

Author

Wosinska, K., Pluta, J., Hanappe, F., Stuttge, L., Angélique, J.C., Basrak, Z., Benoit, B., De-Goes-Brennand, E., Bizard, G., Costa, G., Desesquelles, P., Dorvaux, O., Durand, D., Erazmus, B., Kieliszek, A., Kuleshov, S., Lednicky, R., Leszczynski, P., Marqués, F.M., Materna, T., Mikhailov, K., Miller, K., Papatheofanous, G., Pawlak, T., Przewlocki, M., Staranowicz, A., Stavinsky, A., Tamain, B., Vlasov, A., Institut de Recherches Subatomiques (IReS), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Cancéropôle du Grand Est-Université Louis Pasteur - Strasbourg I-Centre National de la Recherche Scientifique (CNRS), 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), Normandie Université (NU)-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
[PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex]
Published
2001

30. Three-body correlations in Borromean halo nuclei

Author

Marqués, F. M., Labiche, M., Orr, N. A., Angélique, J. C., Axelsson, L., Benoit, B., Bergmann, U. C., García Borge, María José, Catford, W.N., Chappell, S. P. G., Clarke, N. M., Costa, G., Curtis, N., D’Arrigo, A., Brennand, E. D., Oliveira Santos, F. D., Dorvaux, O., Fazio, G., Freer, M., Fulton, B. R., Giardina, G., Grévy, S., Guillemaud-Mueller, D., Hanappe, F., Heusch, B., Jonson, B., Le Brun, C., Leenhardt, S., Lewitowicz, M., López, M. J., Markenroth, K., Mueller, A. C., Nilsson, T., Ninane, A., Nyman, G., Piqueras, Inmaculada, Riisager, K., Saint-Laurent, M. G., Sarazin, F., Singer, S. M., Sorlin, O., Stuttge, L., Góes Brennand, E. D., 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 Recherches Subatomiques (IReS), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Cancéropôle du Grand Est-Université Louis Pasteur - Strasbourg I-Centre National de la Recherche Scientifique (CNRS), 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), Normandie Université (NU)-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 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
Physics, Nuclear and High Energy Physics, [PACS]Properties of specific nuclei listed by mass ranges: 6 ≤ A ≤ 19, 010308 nuclear & particles physics, Nuclear Theory, FOS: Physical sciences, Few-body systems, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], Breakup, 01 natural sciences, Dissociation (chemistry), 3. Good health, Nuclear physics, Combined treatment, 0103 physical sciences, [PACS]Few-body systems, Halo, [PACS]Nucleon distributions and halo features, Nuclear Experiment (nucl-ex), 010306 general physics, 6 ≤ A ≤ 19 [[PACS]Properties of specific nuclei listed by mass ranges], Nuclear Experiment, [PACS]Nuclear reactions involving few-nucleon systems
Abstract

5 pages, 4 figures.--PACS nrs.: 25.10.+s; 21.10.Gv; 21.45.+v; 27.20.+n.--ArXiv pre-print available at: http://arxiv.org/abs/nucl-ex/0101004v2., Three-body correlations in the dissociation of two-neutron halo nuclei are explored using a technique based on intensity interferometry and Dalitz plots. This approach provides for the combined treatment of both the n-n and core-n interactions in the exit channel. As an example, the breakup of Be-14 into Be-12 + n + n by Pb and C targets has been analyzed and the halo n-n separation extracted. Evidence for a finite delay between the emission of the neutrons in the reaction on the C target was observed and is attributed to Be-13 resonances populated in sequential breakup., This work was funded under the auspices of the IN2P3-CNRS (France) and EPSRC (United Kingdom). Additional support from the ALLIANCE program (Ministère des Affaires Etrangères and British Council), the Human Capital and Mobility Program of the European Community (Contract No. CHGE-CT94-0056), and the GDR Noyaux Exotiques (CNRS-CEA) is also acknowledged.

Published
2001
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31. The FIRST experiment at GSI

Author

Pleskac, R., Abou-Haidar, Z., Agodi, C., Alvarez, M. A. G., Aumann, T., Battistoni, G., Bocci, A., Böhlen, T. T., Boudard, A., Brunetti, A., Carpinelli, M., Cirrone, G. A. P., Cortes-Giraldo, M. A., Cuttone, G., De Napoli, M., Durante, M., Fernandez-Garcia, J. P., Finck, C., Golosio, B., Gallardo, M. I., Iarocci, E., Iazzi, F., Ickert, G., Introzzi, R., Juliani, D., Krimmer, J., Kurz, N., Labalme, M., Leifels, Y., Le Fevre, A., Leray, S., Marchetto, F., Monaco, V., Morone, M. C., Oliva, P., Paoloni, A., Piersanti, L., Quesada, J. M., Raciti, G., Randazzo, N., Romano, F., Rossi, D., Rousseau, M., Sacchi, R., Sala, P., Sarti, A., Scheidenberger, C., Schuy, C., Sciubba, A., Sfienti, C., Simon, H., Sipala, V., Spiriti, E., Stuttge, L., Tropea, S., Younis, H., Patera, V., Pleskac, R., Abou-Haidar, Z., Agodi, C., Alvarez, M. A. G., Aumann, T., Battistoni, G., Bocci, A., Böhlen, T. T., Boudard, A., Brunetti, A., Carpinelli, M., Cirrone, G. A. P., Cortes-Giraldo, M. A., Cuttone, G., De Napoli, M., Durante, M., Fernandez-Garcia, J. P., Finck, C., Golosio, B., Gallardo, M. I., Iarocci, E., Iazzi, F., Ickert, G., Introzzi, R., Juliani, D., Krimmer, J., Kurz, N., Labalme, M., Leifels, Y., Le Fevre, A., Leray, S., Marchetto, F., Monaco, V., Morone, M. C., Oliva, P., Paoloni, A., Piersanti, L., Quesada, J. M., Raciti, G., Randazzo, N., Romano, F., Rossi, D., Rousseau, M., Sacchi, R., Sala, P., Sarti, A., Scheidenberger, C., Schuy, C., Sciubba, A., Sfienti, C., Simon, H., Sipala, V., Spiriti, E., Stuttge, L., Tropea, S., Younis, H., and Patera, V.

Abstract

The FIRST (Fragmentation of Ions Relevant for Space and Therapy) experiment at the SIS accelerator of GSl laboratory in Darmstadt has been designed for the measurement of ion fragmentation crosssections at different angles and energies between 100 and 1000 MeV/nucleon. Nuclear fragmentation processes are relevant in several fields of basic research and applied physics and are of particular interest for tumor therapy and for space radiation protection applications. The start of the scientific program of the FIRST experiment was on summer 2011 and was focused on the measurement of 400 MeV/nucleon C-12 beam fragmentation on thin (8 mm) graphite target. The detector is partly based on an already existing setup made of a dipole magnet (ALADiN). a time projection chamber (TP-MUSIC IV), a neutron detector (LAND) and a time of flight scintillator system (TOFWALL). This pre-existing setup has been integrated with newly designed detectors in the Interaction Region, around the carbon target placed in a sample changer. The new detectors are a scintillator Start Counter, a Beam Monitor drift chamber, a silicon Vertex Detector and a Proton Tagger scintillator system optimized for the detection of light fragments emitted at large angles. In this paper we review the experimental setup, then we present the simulation software, the data acquisition system and finally the trigger strategy of the experiment., AuthorCount:57

Published
2012
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32. The FIRST experiment at GSI

Author

Pleskac, R, Abou Haidar, Z, Agodi, C, Alvarez, M, Aumann, T, Battistoni, G, Bocci, A, Bohlen, T, Boudard, A, Brunetti, A, Carpinelli, M, Cirrone, G, Cortes Giraldo, M, Cuttone, G, De Napoli, M, Durante, M, Fernandez Garcia, J, Finck, C, Golosio, B, Gallardo, M, Iarocci, E, Iazzi, F, Ickert, G, Introzzi, R, Juliani, D, Krimmer, J, Kurz, N, Labalme, M, Leifels, Y, Le Fevre, A, Leray, S, Marchetto, F, Monaco, V, Morone, M, Oliva, P, Paoloni, A, Piersanti, L, Quesada, J, Raciti, G, Randazzo, N, Romano, F, Rossi, D, Rousseau, M, Sacchi, R, Sala, P, Sarti, A, Scheidenberger, C, Schuy, C, Sciubba, A, Sfienti, C, Simon, H, Sipala, V, Spiriti, E, Stuttge, L, Tropea, S, Younis, H, Patera, V, Alvarez, MAG, Bohlen, TT, BRUNETTI, Antonio, CARPINELLI, Massimo, Cirrone, GAP, Cortes Giraldo, MA, Fernandez Garcia, JP, Gallardo, MI, Morone, MC, OLIVA, Piernicola, Paoloni A, Quesada, JM, SIPALA, Valeria, Patera, V., Pleskac, R, Abou Haidar, Z, Agodi, C, Alvarez, M, Aumann, T, Battistoni, G, Bocci, A, Bohlen, T, Boudard, A, Brunetti, A, Carpinelli, M, Cirrone, G, Cortes Giraldo, M, Cuttone, G, De Napoli, M, Durante, M, Fernandez Garcia, J, Finck, C, Golosio, B, Gallardo, M, Iarocci, E, Iazzi, F, Ickert, G, Introzzi, R, Juliani, D, Krimmer, J, Kurz, N, Labalme, M, Leifels, Y, Le Fevre, A, Leray, S, Marchetto, F, Monaco, V, Morone, M, Oliva, P, Paoloni, A, Piersanti, L, Quesada, J, Raciti, G, Randazzo, N, Romano, F, Rossi, D, Rousseau, M, Sacchi, R, Sala, P, Sarti, A, Scheidenberger, C, Schuy, C, Sciubba, A, Sfienti, C, Simon, H, Sipala, V, Spiriti, E, Stuttge, L, Tropea, S, Younis, H, Patera, V, Alvarez, MAG, Bohlen, TT, BRUNETTI, Antonio, CARPINELLI, Massimo, Cirrone, GAP, Cortes Giraldo, MA, Fernandez Garcia, JP, Gallardo, MI, Morone, MC, OLIVA, Piernicola, Paoloni A, Quesada, JM, SIPALA, Valeria, and Patera, V.

Abstract

The FIRST (Fragmentation of Ions Relevant for Space and Therapy) experiment at the SIS accelerator of GSI laboratory in Darmstadt has been designed for the measurement of ion fragmentation cross-sections at different angles and energies between 100 and 1000 MeV/nucleon. Nuclear fragmentation processes are relevant in several fields of basic research and applied physics and are of particular interest for tumor therapy and for space radiation protection applications. The start of the scientific program of the FIRST experiment was on summer 2011 and was focused on the measurement of 400 MeV/nucleon 12C beam fragmentation on thin (8 mm) graphite target. The detector is partly based on an already existing setup made of a dipole magnet (ALADiN), a time projection chamber (TP-MUSIC IV), a neutron detector (LAND) and a time of flight scintillator system (TOFWALL). This pre-existing setup has been integrated with newly designed detectors in the Interaction Region, around the carbon target placed in a sample changer. The new detectors are a scintillator Start Counter, a Beam Monitor drift chamber, a silicon Vertex Detector and a Proton Tagger scintillator system optimized for the detection of light fragments emitted at large angles. In this paper we review the experimental setup, then we present the simulation software, the data acquisition system and finally the trigger strategy of the experiment.

Published
2012

33. The KENTROS detector for identification and kinetic energy measurements of nuclear fragments at polar angles between 5 and 90 degrees

Author

De Napoli, M, Agodi, C, Brunetti, A, Golosio, B, Nicolosi, D, Oliva, P, Sipala, V, Abou Haidar, Z, Alvarez, M, Aumann, T, Balestra, F, Battistoni, G, Bocci, A, Bohlen, T, Bondi, M, Boudard, A, Carbone, D, Cappuzzello, F, Carpinelli, M, Cavallaro, M, Cirrone, G, Cortes Giraldo, M, Cuttone, G, Durante, M, Fernandez Garcia, J, Finck, C, Gallardo, M, Iarocci, E, Iazzi, F, Introzzi, R, Ickert, G, Juliani, D, Krimmer, J, Kurtz, N, Labalme, M, Leifels, Y, Le Fevre, A, Leray, S, Marchetto, F, Monaco, V, Morone, M, Paoloni, A, Patera, V, Piersanti, L, Pleskac, R, Quesada, J, Raciti, G, Randazzo, N, Romano, F, Rossi, D, Rosso, V, Rousseau, M, Sacchi, R, Sala, P, Sarti, A, Scheidenberger, C, Schuy, C, Sciubba, A, Sfienti, C, Simon, H, Spiriti, E, Stuttge, L, Tropea, S, Younis, H, BRUNETTI, Antonio, OLIVA, Piernicola, SIPALA, Valeria, Alvarez, MAG, Bohlen, TT, CARPINELLI, Massimo, Cirrone, GAP, Cortes Giraldo, MA, Fernandez Garcia, J. P, Gallardo, MI, Morone, MC, Quesada, JM, Younis, H., De Napoli, M, Agodi, C, Brunetti, A, Golosio, B, Nicolosi, D, Oliva, P, Sipala, V, Abou Haidar, Z, Alvarez, M, Aumann, T, Balestra, F, Battistoni, G, Bocci, A, Bohlen, T, Bondi, M, Boudard, A, Carbone, D, Cappuzzello, F, Carpinelli, M, Cavallaro, M, Cirrone, G, Cortes Giraldo, M, Cuttone, G, Durante, M, Fernandez Garcia, J, Finck, C, Gallardo, M, Iarocci, E, Iazzi, F, Introzzi, R, Ickert, G, Juliani, D, Krimmer, J, Kurtz, N, Labalme, M, Leifels, Y, Le Fevre, A, Leray, S, Marchetto, F, Monaco, V, Morone, M, Paoloni, A, Patera, V, Piersanti, L, Pleskac, R, Quesada, J, Raciti, G, Randazzo, N, Romano, F, Rossi, D, Rosso, V, Rousseau, M, Sacchi, R, Sala, P, Sarti, A, Scheidenberger, C, Schuy, C, Sciubba, A, Sfienti, C, Simon, H, Spiriti, E, Stuttge, L, Tropea, S, Younis, H, BRUNETTI, Antonio, OLIVA, Piernicola, SIPALA, Valeria, Alvarez, MAG, Bohlen, TT, CARPINELLI, Massimo, Cirrone, GAP, Cortes Giraldo, MA, Fernandez Garcia, J. P, Gallardo, MI, Morone, MC, Quesada, JM, and Younis, H.

Abstract

KENTROS (Kinetic ENergy and Time Resolution Optimized on Scintillator) is a relatively compact detector that has been projected and constructed in the framework of the INFN FRAG and TPS experiments. KENTROS has been designed for energy deposition and time of flight measurements of charged particles. The detector ensures an angular coverage from about 5 degrees up to about 90 degrees polar angle in the laboratory frame. Recently KENTROS has been used as part of the FIRST experiment, devoted to measure double differential fragmentation cross sections, with the aim to detect light fragments produced in the nuclear fragmentation process.

Published
2012

34. Fission modes in the reaction Pb-208(O-18,f)

Author

Pokrovsky, Iv, Itkis, Mg, Itkis, Jm, Kondratiev, Na, Kozulin, Em, Prokhorova, Ev, Salamatin, Vs, Pashkevich, Vv, Mulgin, Si, Rusanov, Ay, Zhdanov, Sv, Chubarian, Gg, Hurst, Bj, Schmitt, Rp, Agodi, C, Bellia, Giorgio Concetto, Calabretta, L, Lukashin, K, Maiolino, C, Kelic, A, Rudolf, G, Stuttge, L, and Hanappe, F.

Published
2000

35. The FIRST experiment for nuclear fragmentation measurements at GSI

Author

Golosio, B., Abou-Haidar, Z., Agodi, C., Alvarez, M. A. G., Aumann, T., Battistoni, G., Bocci, A., Bohlen, T. T., Boudard, A., Brunetti, A., Carpinelli, M., Cirrone, G. A. P., Cortes-Giraldo, M. A., Cuttone, G., De Napoli, M., Durante, M., Finck, C., Hannan, Y., Iarocci, E., Iazzi, F., Ickert, G., Introzzi, R., Juliani, D., Krimmer, J., Kurz, N., Labalme, M., Leifels, I., Le Fevre, A., Leray, S., Marchetto, F., Masala, G. L., Monaco, V., Morone, M. C., Oliva, P., Paoloni, A., Patera, V., Piersanti, L., Pleskac, R., Quesada, J. M., Randazzo, N., Romano, F., Rossi, D., Rousseau, M., Sacchi, R., Sala, P., Sarti, A., Scheidenberger, C., Schuy, C., Sciubba, A., Sfienti, C., Simon, H., Sipala, V., Spiriti, E., Stuttge, L., Tropea, S., Golosio, B., Abou-Haidar, Z., Agodi, C., Alvarez, M. A. G., Aumann, T., Battistoni, G., Bocci, A., Bohlen, T. T., Boudard, A., Brunetti, A., Carpinelli, M., Cirrone, G. A. P., Cortes-Giraldo, M. A., Cuttone, G., De Napoli, M., Durante, M., Finck, C., Hannan, Y., Iarocci, E., Iazzi, F., Ickert, G., Introzzi, R., Juliani, D., Krimmer, J., Kurz, N., Labalme, M., Leifels, I., Le Fevre, A., Leray, S., Marchetto, F., Masala, G. L., Monaco, V., Morone, M. C., Oliva, P., Paoloni, A., Patera, V., Piersanti, L., Pleskac, R., Quesada, J. M., Randazzo, N., Romano, F., Rossi, D., Rousseau, M., Sacchi, R., Sala, P., Sarti, A., Scheidenberger, C., Schuy, C., Sciubba, A., Sfienti, C., Simon, H., Sipala, V., Spiriti, E., Stuttge, L., and Tropea, S.

Abstract

Nuclear fragmentation processes are relevant in different fields of physics concerning both basic research and applications. FIRST (Fragmentation of Ions Relevant for Space and Therapy) is an experiment aimed at the measurement of double differential cross sections (DDCS), with respect to kinetic energy and scattering polar angle, of nuclear fragmentation processes relevant for hadron therapy and for space radiation protection applications, in the energy range between 100 and 1000 MeV/u. The experiment was mounted at the GSI laboratories of Darmstadt, in Germany. A first data taking was performed in August 2011, using 400 MeV/u 12C on carbon and gold targets. In this work we present a description of the experimental apparatus and some figures from the data acquisition and from the preliminary work on data analysis

Published
2011
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36. New gas-filled mode of the large-acceptance spectrometer VAMOS

Author

Schmitt, C., Rejmund, M., Navin, A., Lecornu, B., Jacquot, Bertrand, de France, Gilles, Lemasson, A., Shrivastava, A., Greenlees, P., Uusitalo, J., Subotić, Krunoslav M., Gaudefroy, L., Theisen, Christophe, Sulignano, Barbara, Dorvaux, O., Stuttge, L., Schmitt, C., Rejmund, M., Navin, A., Lecornu, B., Jacquot, Bertrand, de France, Gilles, Lemasson, A., Shrivastava, A., Greenlees, P., Uusitalo, J., Subotić, Krunoslav M., Gaudefroy, L., Theisen, Christophe, Sulignano, Barbara, Dorvaux, O., and Stuttge, L.

Abstract

A new gas-filled operation mode of the large-acceptance spectrometer VAMOS at GANIL is reported. A beam rejection factor greater than 10(10) is obtained for the Ca-40+Sm-150 system at 196 MeV. The unprecedented transmission efficiency for the evaporation residues produced in this reaction is estimated to be around 80% for alpha x n channels and above 95% for x ny p channels. A detailed study of the performance of the gas-filled VAMOS and future developments are discussed. This new operation mode opens avenues to explore the potential of fusion reactions in various kinematics. (C) 2010 Elsevier B.V. All rights reserved.

Published
2010

37. Exotic molecular and halo states in ${12,14}Be$

Author

Freer, M., Orr, N.A., Labiche, M., Marqués, F.M., Angélique, J.C., Axelsson, L., Benoit, B., Bergmann, U., Borge, M J G., Catford, W N., Chappell, S P G., Clarke, N M., Costa, G., Curtis, N., D'Arrigo, A., D'Oliviera, F., De Goes-Brennard, E., Dorvaux, O., Fulton, B R., Gardina, G., Gregori, C., Grevy, S., Guillemaud-Mueller, D., Hanappe, F., Heusch, B., Jonson, B., Kelly, G., Le Brun, C., Leenhardt, S., Lewitowicz, M., Markenroth, K., Motta, M., Mueller, A C., Murgatroyd, J T., Nilsson, T., Ninane, A., Nyman, G., Piqueras, I., Riisager, K., Saint-Laurent, M.G., Sarazin, F., Singer, S., Sorlin, O., Stuttge, L., Watson, D L., 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 Pluridisciplinaire Hubert Curien (IPHC), Université de Strasbourg (UNISTRA)-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), 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), Sherrill B.M., Normandie Université (NU)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-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
[PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], Nuclear Physics
Abstract

International audience; The two nuclei 12Be and 14Be have been studied using breakup reactions on p, 12C and 208Pb targets. The decay of 12Be into two helium clusters (6He+6He and 4He+8He) was observed from a series of excited states between 10 and 25 MeV, with spins in the range 4+ to 8+. The single neutron angular distributions for 14Be exhibit the narrow forward peak characteristic of a halo. The widths of these distributions in coincidence with 12Be fragments are ΓL = 78±6 and 80±1 MeV/c for breakup on carbon and lead.

Published
1998

38. FIRST experiment: Fragmentation of Ions Relevant for Space and Therapy

Author

Agodi, C, primary, Abou-Haidar, Z, additional, Alvarez, M A G, additional, Aumann, T, additional, Balestra, F, additional, Battistoni, G, additional, Bocci, A, additional, Bohlen, T T, additional, Bondì, M, additional, Boudard, A, additional, Brunetti, A, additional, Carpinelli, M, additional, Cappuzzello, F, additional, Cavallaro, M, additional, Carbone, D, additional, Cirrone, G A P, additional, Cortes-Giraldo, M A, additional, Cuttone, G, additional, Napoli, M De, additional, Durante, M, additional, Fernandez-Garcia, J P, additional, Finck, C, additional, Foti, A, additional, Gallardo, M I, additional, Golosio, B, additional, Iarocci, E, additional, Iazzi, F, additional, Ickert, G, additional, Introzzi, R, additional, Juliani, D, additional, Krimmer, J, additional, Kurz, N, additional, Labalme, M, additional, Lavagno, A, additional, Leifels, Y, additional, Fevre, A Le, additional, Leray, S, additional, Marchetto, F, additional, Monaco, V, additional, Morone, M C, additional, Nicolosi, D, additional, Oliva, P, additional, Paoloni, A, additional, Patera, V, additional, Piersanti, L, additional, Pleskac, R, additional, Quesada, J M, additional, Randazzo, N, additional, Romano, F, additional, Rossi, D, additional, Rosso, V, additional, Rousseau, M, additional, Sacchi, R, additional, Sala, P, additional, Sarti, A, additional, Scheidenberger, C, additional, Schuy, C, additional, Sciubba, A, additional, Sfienti, C, additional, Simon, H, additional, Sipala, V, additional, Spiriti, E, additional, Stuttge, L, additional, Tropea, S, additional, and Younis, H, additional

Published
2013
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39. B(E1) strengths from Coulomb excitation of Be-11

Author

Summers, NC, Pain, SD, Orr, NA, Catford, WN, Angelique, JC, Ashwood, NI, Bouchat, V, Clarke, NM, Curtis, N, Freer, M, Fulton, BR, Hanappe, F, Labiche, M, Lecouey, JL, Lemmon, RC, Mahboub, D, Ninane, A, Normand, G, Nunes, FM, Soic, N, Stuttge, L, Timis, CN, Thompson, IJ, Winfield, JS, Ziman, V, Summers, NC, Pain, SD, Orr, NA, Catford, WN, Angelique, JC, Ashwood, NI, Bouchat, V, Clarke, NM, Curtis, N, Freer, M, Fulton, BR, Hanappe, F, Labiche, M, Lecouey, JL, Lemmon, RC, Mahboub, D, Ninane, A, Normand, G, Nunes, FM, Soic, N, Stuttge, L, Timis, CN, Thompson, IJ, Winfield, JS, and Ziman, V

Published
2007

40. Structure of Be-12: Intruder d-wave strength at N=8

Author

UCL, Pain, S.D., Catford, W.N., Orr, N.A., Angelique, J.C., Ashwood, N.I., Clarke, N.M., Curtis, N., Freer, M., Fulton, B.R., Hanappe, F., Labiche, M., Lecouey, J.L., Lemmon, R.C., Mahboub, D., Normand, G., Soic, N., Stuttge, L., Timis, C.N., Tostevin, J.A., Winfield, J.S., Ziman, V., Bouchat, Véronique, Ninane, Alain, UCL, Pain, S.D., Catford, W.N., Orr, N.A., Angelique, J.C., Ashwood, N.I., Clarke, N.M., Curtis, N., Freer, M., Fulton, B.R., Hanappe, F., Labiche, M., Lecouey, J.L., Lemmon, R.C., Mahboub, D., Normand, G., Soic, N., Stuttge, L., Timis, C.N., Tostevin, J.A., Winfield, J.S., Ziman, V., Bouchat, Véronique, and Ninane, Alain

Abstract

The breaking of the N=8 shell-model magic number in the 12Be ground state has been determined to include significant occupancy of the intruder d-wave orbital. This is in marked contrast with all other N=8 isotones, both more and less exotic than 12Be. The occupancies of the 0 hbar omega neutron p1/2-orbital and the 1 hbar omega, neutron d5/2 intruder orbital were deduced from a measurement of neutron removal from a high-energy 12Be beam leading to bound and unbound states in 11Be. Comment: 5 pages, 2 figures

Published
2006

41. Nature and properties of the fission modes of the neutron deficient $^{220,224,226}$Th nuclides

Author

Itkis, M.G., Kondratiev, N.A., Kozulin, E.M., Oganessian, Yu.Ts., Pashkevich, V.V., Pokrovsky, I.V., Rusanov, A.Ya., Salamatin, V.S., Calabretta, L., Maiolino, C., Lukashi, K., Agodi, C., Bellia, G., Chubarian, G.G., Hurst, B., O'Kelly, D., Schmitt, R., Hanappe, F., Liatard, E., Stuttge, L., Laboratoire de Physique Subatomique et de Cosmologie (LPSC), Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Institut Polytechnique de Grenoble - Grenoble Institute of Technology-Centre National de la Recherche Scientifique (CNRS), Giardina G. Fazio G. Lattuada M., and bibliotheque, LPSC

Subjects
[PHYS.NEXP] Physics [physics]/Nuclear Experiment [nucl-ex], [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], Nuclear Physics
Published
1996

42. Some aspects of fission in nuclear collisions at intermediate energies

Author

Bizard, G., Colin, J., Durand, D., Genoux-Lubain, A., Le Brun, C., Lecolley, J.F., Louvel, M., Meslin, C., Rudolf, G., Steckmeyer, J.C., Stuttge, L., Guesnon, Sandrine, 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 Recherches Subatomiques (IReS), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Cancéropôle du Grand Est-Université Louis Pasteur - Strasbourg I-Centre National de la Recherche Scientifique (CNRS), and Normandie Université (NU)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)

Subjects
[PHYS.NEXP] Physics [physics]/Nuclear Experiment [nucl-ex], [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], Nuclear Physics
Published
1996

43. Structure of Be-12: Intruder d-wave strength at N=8

Author

UCL - SC/PHYS - Département de physique, Pain, S.D., Catford, W.N., Orr, N.A., Angelique, J.C., Ashwood, N.I., Clarke, N.M., Curtis, N., Freer, M., Fulton, B.R., Hanappe, F., Labiche, M., Lecouey, J.L., Lemmon, R.C., Mahboub, D., Normand, G., Soic, N., Stuttge, L., Timis, C.N., Tostevin, J.A., Winfield, J.S., Ziman, V., Bouchat, Véronique, Ninane, Alain, UCL - SC/PHYS - Département de physique, Pain, S.D., Catford, W.N., Orr, N.A., Angelique, J.C., Ashwood, N.I., Clarke, N.M., Curtis, N., Freer, M., Fulton, B.R., Hanappe, F., Labiche, M., Lecouey, J.L., Lemmon, R.C., Mahboub, D., Normand, G., Soic, N., Stuttge, L., Timis, C.N., Tostevin, J.A., Winfield, J.S., Ziman, V., Bouchat, Véronique, and Ninane, Alain

Abstract

The breaking of the N=8 shell-model magic number in the 12Be ground state has been determined to include significant occupancy of the intruder d-wave orbital. This is in marked contrast with all other N=8 isotones, both more and less exotic than 12Be. The occupancies of the 0 hbar omega neutron p1/2-orbital and the 1 hbar omega, neutron d5/2 intruder orbital were deduced from a measurement of neutron removal from a high-energy 12Be beam leading to bound and unbound states in 11Be. Comment: 5 pages, 2 figures

Published
2005

44. Proton induced reactions on U-natural at 62.9-MeV

Author

UCL - SC/PHYS - Département de physique, Guertin, A., Auduc, S., Riviere, G., Eudes, P., Haddad, F., Lebrun, C., Kirchner, T., Le Brun, C., Lecolley, F.R., Lecolley, J.F., Louvel, M., Lefebvres, F., Marie, N., Varignon, C., Ledoux, X., Patin, Y., Pras, Ph., Stuttge, L., Hanappe, F., Delbar, Thierry, Ninane, Alain, UCL - SC/PHYS - Département de physique, Guertin, A., Auduc, S., Riviere, G., Eudes, P., Haddad, F., Lebrun, C., Kirchner, T., Le Brun, C., Lecolley, F.R., Lecolley, J.F., Louvel, M., Lefebvres, F., Marie, N., Varignon, C., Ledoux, X., Patin, Y., Pras, Ph., Stuttge, L., Hanappe, F., Delbar, Thierry, and Ninane, Alain

Abstract

Double differential cross sections (DDCS) for light charged particles (proton, deuteron, triton, 3He, alpha) and neutrons produced by a proton beam impinging on a 238U target at 62.9 MeV were measured at the CYCLONE facility in Louvain-la-Neuve (Belgium). These measurements have been performed using two independent experimental set-ups ensuring neutron (DeMoN counters) and light charged particles (Si-Si-CsI telescopes) detection. The charged particle data were measured at 11 different angular positions from 25 degrees to 140 degrees allowing the determination of angle differential, energy differential and total production cross sections.

Published
2005

45. Evidence of a (1d(5/2))(2) component to the Be-12 ground state

Author

Pain, SD, Catford, WN, Orr, NA, Angelique, JC, Ashwood, NI, Bouchat, V, Clarke, NM, Curtis, N, Freer, M, Fulton, B, Hanappe, F, Labiche, M, Lecouey, JL, Lemmon, R, Mahboub, D, Ninane, A, Normand, G, Soic, N, Stuttge, L, Timis, CN, Tostevin, JA, Ziman, V, Winfield, J, Seweryniak, D, Khoo, TL, Pain, SD, Catford, WN, Orr, NA, Angelique, JC, Ashwood, NI, Bouchat, V, Clarke, NM, Curtis, N, Freer, M, Fulton, B, Hanappe, F, Labiche, M, Lecouey, JL, Lemmon, R, Mahboub, D, Ninane, A, Normand, G, Soic, N, Stuttge, L, Timis, CN, Tostevin, JA, Ziman, V, Winfield, J, Seweryniak, D, and Khoo, TL

Abstract

Data have been obtained on exclusive single neutron knockout cross sections from 12Be to study its ground state structure. The cross sections for the production of 11Be in its ground state (1/2 +) and first excited state (0.32 MeV, 1/2 -) have previously been measured, indicating a strong (2s 1 2) 2 component to the 12Be ground state. In the present experiment, performed at the GANIL laboratory, cross sections for the first (0.32 MeV, 1/2 -) and second (1.78 MeV, 5/2 +, unbound) excited states in 11Be were measured, which gives information on the admixture of (1p 1 2) 2 and (1d 5 2) 2 components in the ground state of 12Be. A fragmentation beam of 12Be of ∼10000 pps (95% pure) was incident on a carbon target at 41 MeV/u. The beam particles were tracked onto the target, and their energies were measured event-by-event. The beam-like residues were measured in a position sensitive telescope mounted at zero degrees, and neutrons were measured in the DéMoN array. The 1/2 - state of 11Be was identified by measuring coincident 320 keV γ-rays, using four NaI detectors. Full kinematic reconstruction of unbound states in 11Be was performed using coincident neutrons and 10Be ions. Detailed simulations were performed in order to interpret the data, and spectroscopic factors were calculated, using preliminary single particle removal cross sections calculated using a Glauber model. © 2005 American Institute of Physics.

Published
2005

46. Neutron removal and cluster breakup of b-14 and be-14

Author

UCL - SC/PHYS - Département de physique, Ashwood, N.I., Freer, M., Angelique, J.C., Catford, W.N., Clarke, N.M., Curtis, N., Dorvaux, O., Hanappe, F., Kerckx, Y., Labiche, M., Lecouey, J.L., Marques, F.M., Materna, T., Normand, G., Orr, N.A., Pain, S., Soic, N., Stuttge, L., Timis, C., Unshakova, A., Ziman, V.A., Bouchat, Véronique, Ninane, Alain, UCL - SC/PHYS - Département de physique, Ashwood, N.I., Freer, M., Angelique, J.C., Catford, W.N., Clarke, N.M., Curtis, N., Dorvaux, O., Hanappe, F., Kerckx, Y., Labiche, M., Lecouey, J.L., Marques, F.M., Materna, T., Normand, G., Orr, N.A., Pain, S., Soic, N., Stuttge, L., Timis, C., Unshakova, A., Ziman, V.A., Bouchat, Véronique, and Ninane, Alain

Published
2004

47. Measurements of the breakup and neutron removal cross sections for **16C

Author

UCL - SC/PHYS - Département de physique, Ashwood, N.I., Freer, M., Angelique, J.C., Catford, W.N., Clarke, N.M., Curtis, N., Dorvaux, O., Hanappe, F., Kerckx, Y., Labiche, M., Lecouey, J.L., Marques, F.M., Materna, T., Normand, G., Orr, N.A., Pain, S., Soic, N., Stuttge, L., Timis, C., Unshakova, A., Ziman, V.A., Bouchat, Véronique, Ninane, Alain, UCL - SC/PHYS - Département de physique, Ashwood, N.I., Freer, M., Angelique, J.C., Catford, W.N., Clarke, N.M., Curtis, N., Dorvaux, O., Hanappe, F., Kerckx, Y., Labiche, M., Lecouey, J.L., Marques, F.M., Materna, T., Normand, G., Orr, N.A., Pain, S., Soic, N., Stuttge, L., Timis, C., Unshakova, A., Ziman, V.A., Bouchat, Véronique, and Ninane, Alain

Published
2004

48. Experimental study of H-4 in the reactions H-2(t, p) and H-3(t, d)

Author

UCL, Sidorchuk, SI, Bogdanov, DD, Fomichev, AS, Golovkov, MS, Oganessian, YT, Rodin, AM, Slepnev, RS, Stepantsov, SV, Ter-Akopian, GM, Wolski, R., Korsheninnikov, AA, Nikolskii, EY, Yukhimchuk, AA, Perevozchikov, VV, Vinogradov, YI, Hanappe, F., Materna, T., Stuttge, L., Ninane, Alain, Roussel-Chomaz, P., Mittig, W., UCL, Sidorchuk, SI, Bogdanov, DD, Fomichev, AS, Golovkov, MS, Oganessian, YT, Rodin, AM, Slepnev, RS, Stepantsov, SV, Ter-Akopian, GM, Wolski, R., Korsheninnikov, AA, Nikolskii, EY, Yukhimchuk, AA, Perevozchikov, VV, Vinogradov, YI, Hanappe, F., Materna, T., Stuttge, L., Ninane, Alain, Roussel-Chomaz, P., and Mittig, W.

Abstract

The H-4 resonance was investigated in the transfer reactions H-2(t,p)H-4 and H-3(t,d)H-4 using cryogenic liquid targets of deuterium and tritium and 58 MeV triton beam. The multidetector system with a large angular acceptance was used to measure the recoil protons and deuterons in coincidences with tritons or neutrons from the decay of H-4. Data analysis involved careful considerations made for the competing processes of final state interaction and quasifree scattering. The experimental data show a peak with resonance parameters E-res = 3.05 +/- 0.19 MeV and Gamma(obs) = 4.18 +/- 1.02 MeV. The pole of S-matrix corresponding to the physical values of energy and width, E-0 = 1.99 +/- 0.37 MeV and Gamma(0) = 2.85 +/- 10.3 MeV, has been extracted. (C) 2004 Elsevier B.V. All rights reserved.

Published
2004

49. Nuclear disassembly time scales using space-time correlations

Author

Durand, D., Colin, J., Lecolley, J.F., Meslin, C., Aboufirassi, M., Bilwes, B., Bougault, R., Brou, R., Cosmo, F., Galin, J., Genoux-Lubain, A., Guerreau, D., Horn, D., Jacquet, D., Laville, J.L., Le Brun, C., Lopez, O., Louvel, M., Mahi, M., Morjean, M., Peghaire, A., Rudolf, G., Scheibling, F., Steckmeyer, J.C., Stuttge, L., Tamain, B., Tomasevic, S., 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 Recherches Subatomiques (IReS), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Cancéropôle du Grand Est-Université Louis Pasteur - Strasbourg I-Centre National de la Recherche Scientifique (CNRS), 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), Robert, Suzanne, 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), Normandie Université (NU)-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
[PHYS.NEXP] Physics [physics]/Nuclear Experiment [nucl-ex], [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], Nuclear Physics
Published
1995

50. Multifragmentation in peripheral nucleus-nucleus collisions

Author

Trautmann, W., Adloff, J.C., Begemann-Blaich, M., Bouissou, P., Hubele, J., Imme, G., Iori, I., Kreutz, P., Kunde, G.J., Leray, S., Lindenstruth, V., Liu, Z., Lynen, U., Meijer, R.J., Milkau, U., Moroni, A., Mueller, W.F.J., Ngo, C., Ogilvie, C.A., Pochodzalla, J., Raciti, G., Rudolf, G., Sann, H., Schuettauf, A., Seidel, W., Stuttge, L., Tucholski, A., Heyd, Yvette, Institut de Recherches Subatomiques (IReS), and Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Cancéropôle du Grand Est-Université Louis Pasteur - Strasbourg I-Centre National de la Recherche Scientifique (CNRS)

Subjects
[PHYS.NEXP] Physics [physics]/Nuclear Experiment [nucl-ex], [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex]
Published
1994

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