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1. Stopping power of fission fragments in thin Mylar and nickel foils

Author

Ulli Köster, Q. Deshayes, A. Letourneau, M. Kebbiri, T. Materna, E. Berthoumieux, D. Doré, L. Thulliez, X. Ledoux, Y.H. Kim, Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, Institut Laue-Langevin (ILL), ILL, 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), 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
Fission, Nuclear and High Energy Physics, Energy loss, Physics - Instrumentation and Detectors, Materials science, Separator (oil production), chemistry.chemical_element, FOS: Physical sciences, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], Stopping power, Kinetic energy, 01 natural sciences, Heavy ions, Ion, 0103 physical sciences, [PHYS.PHYS.PHYS-INS-DET]Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det], Nuclear Experiment (nucl-ex), 010306 general physics, Nuclear Experiment, Instrumentation, 010308 nuclear & particles physics, Instrumentation and Detectors (physics.ins-det), Nickel, Cardinal point, chemistry, Atomic physics
Abstract

The energy loss of heavy ions in thin Mylar and nickel foils was measured accurately using fission fragments from $^{239}Pu(n_{th},f)$, mass and energy separated by the Lohengrin separator at ILL. The detection setup, placed at the focal plane of the Lohengrin separator enabled to measure precisely the kinetic energy difference of selected fragments after passing through the sample. From these data, the stopping powers in Mylar and nickel layers were extracted and compared to calculations. Whereas large deviations are observed with SRIM-2013 for Mylar, fairly good agreements are obtained with the semi-empirical approach of Knyazheva et al. and the calculations contained within the DPASS database. In nickel, SRIM-2013 and Knyazheva model are in agreement with our data within about 10 %, while large deviations are observed with DPASS. We used our data to provide updated parameters for the Knyazheva et al. model and rescale DPASS database for nickel and Mylar., Comment: 19 pages, 18 figures

Published
2021
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2. Halo Structure of the Neutron-Dripline Nucleus B19

Author

K. J. Cook, T. Kobayashi, S. K. Kim, H. Baba, T. Motobayashi, T. Murakami, S. Leblond, Takashi Nakamura, Yosuke Kondo, Hiroyuki Takeda, Ryuki Tanaka, Julien Gibelin, Noritsugu Nakatsuka, Hideaki Otsu, D. Kameda, K. Yoneda, Satoshi Takeuchi, Toshiyuki Kubo, Y. Satou, Kazuyuki Ogata, T. Isobe, Thomas Aumann, N. L. Achouri, Atsumi Saito, Nagao Kobayashi, T. Nakashima, S. Nishi, J. Lee, D. Kanno, Kouichi Hagino, S. Ogoshi, Q. Deshayes, K. Takahashi, Yohei Shimizu, Yasuhiro Togano, Daichi Murai, A. G. Tuff, K. Muto, H. Suzuki, Marine Vandebrouck, Franck Delaunay, F. M. Marqués, H. Sato, P. Doornenbal, Jongwon Hwang, A. Navin, Naoki Fukuda, N. A. Orr, J. Tsubota, Naohito Inabe, and R. Minakata

Subjects
Physics, Valence (chemistry), Isotope, Nuclear Theory, General Physics and Astronomy, 01 natural sciences, Dipole, 0103 physical sciences, Coulomb, Neutron, Halo, Atomic physics, Nuclear Experiment, 010306 general physics, Nucleon, Excitation
Abstract

The heaviest bound isotope of boron ^{19}B has been investigated using exclusive measurements of its Coulomb dissociation, into ^{17}B and two neutrons, in collisions with Pb at 220 MeV/nucleon. Enhanced electric dipole (E1) strength is observed just above the two-neutron decay threshold with an integrated E1 strength of B(E1)=1.64±0.06(stat)±0.12(sys) e^{2} fm^{2} for relative energies below 6 MeV. This feature, known as a soft E1 excitation, provides the first firm evidence that ^{19}B has a prominent two-neutron halo. Three-body calculations that reproduce the energy spectrum indicate that the valence neutrons have a significant s-wave configuration and exhibit a dineutronlike correlation.

Published
2020
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3. Extending the Southern Shore of the Island of Inversion to F28

Author

J. Mayer, Noritsugu Nakatsuka, Michael Thoennessen, A. Gillibert, Ákos Horváth, Q. Deshayes, Yosuke Kondo, J. Tscheuschner, Nasser Kalantar-Nayestanaki, J. M. Gheller, István Kuti, M. Shikata, Thomas Aumann, C. Caesar, J. Tsubota, A. Revel, N. L. Achouri, W. He, Z. Elekes, Calem Hoffman, Shoichiro Kawase, Heiko Scheit, J. Kahlbow, Masahiro Yasuda, H. Simon, H. Sato, K. Yoneda, A. Horvat, K. Nakano, Igor Gašparić, T. Ozaki, H. Chae, J. A. Tostevin, L. Stuhl, K. Miki, F. de Oliveira Santos, H. L. Crawford, D. Calvet, Stefanos Paschalis, S. Masuoka, T. Isobe, A. Obertelli, Tomoki Saito, Momoko Tanaka, N. A. Orr, Shoko Koyama, Nobuyuki Chiga, L. Atar, Y. Satou, P. Fallon, Atsumi Saito, Zsolt Dombrádi, H. Törnqvist, Jongwon Hwang, A. Corsi, Julien Gibelin, K. Boretzky, A. Delbart, D. M. Rossi, H. Baba, Masaki Sasano, D. Sohler, V. Lapoux, M. A. Najafi, S. K. Kim, A. Hirayama, H. Al Falou, K. Kisamori, T. Tomai, V. Panin, P. Schrock, Takashi Nakamura, Yasuhiro Togano, M.N. Harakeh, M. Holl, Zaihong Yang, F. Nowacki, T. Kobayashi, Cenxi Yuan, D. Körper, Tomohiro Uesaka, Thomas Nilsson, C. A. Douma, Simon Lindberg, Hideaki Otsu, O. Sorlin, T. Murakami, Yohei Shimizu, Fabia Schindler, Franck Delaunay, F. M. Marqués, and Satoshi Takeuchi

Subjects
Physics, Proton, Island of inversion, General Physics and Astronomy, 01 natural sciences, Spectral line, Momentum, 0103 physical sciences, Neutron, Atomic physics, 010306 general physics, Nucleon, Spectroscopy, Ground state
Abstract

Detailed spectroscopy of the neutron-unbound nucleus 28 F has been performed for the first time following proton/neutron removal from 29 Ne / 29 F beams at energies around 230 MeV / nucleon . The invariant-mass spectra were reconstructed for both the 27 F ( * ) + n and 26 F ( * ) + 2 n coincidences and revealed a series of well-defined resonances. A near-threshold state was observed in both reactions and is identified as the 28 F ground state, with S n ( 28 F ) = − 199 ( 6 ) keV , while analysis of the 2 n decay channel allowed a considerably improved S n ( 27 F ) = 1620 ( 60 ) keV to be deduced. Comparison with shell-model predictions and eikonal-model reaction calculations have allowed spin-parity assignments to be proposed for some of the lower-lying levels of 28 F . Importantly, in the case of the ground state, the reconstructed 27 F + n momentum distribution following neutron removal from 29 F indicates that it arises mainly from the 1 p 3 / 2 neutron intruder configuration. This demonstrates that the island of inversion around N = 20 includes 28 F , and most probably 29 F , and suggests that 28 O is not doubly magic.

Published
2020
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4. Lifetime measurement of the $^{26}0 g.s.$ at SAMURAI

Author

Hiroyuki Takeda, Takashi Nakamura, Hideaki Otsu, Olivier Sorlin, Masaki Sasano, Zaihong Yang, I. Murray, D. M. Rossi, Yuya Kubota, A. Hirayama, Thomas Aumann, Makoto Yasuda, K. I. Hahn, L. Atar, H. Baba, Sonja Storck, S. Choi, Z. Halász, Yohei Shimizu, C. Caesar, L. Stuhl, H. Scheit, C. Lehr, Nobuyuki Chiga, Yasuhiro Togano, Thomas Nilsson, Hans Törnqvist, Z. Elekes, D. Körper, M. Matsumoto, M. L. Cortés, Naohito Inabe, Yosuke Kondo, T. Murakami, D. S. Ahn, K. Yoneda, Marina Petri, Atsumi Saito, T. Tomai, Tomohiro Uesaka, M. Parlog, Simon Lindberg, V. Panin, M. Marques, D. Cortina-Gil, T. Isobe, H. Chae, S. K. Kim, István Kuti, Jongwon Hwang, Herbert A. Simon, P. Schrock, Naoki Fukuda, T. Kobayashi, J. Kahlbow, H. Suzuki, D. Sohler, H. Yamada, I. Syndikus, K. Boretzky, Q. Deshayes, P. Doornenbal, I. Gaparic, Stefanos Paschalis, Laboratoire de physique corpusculaire de Caen (LPCC), Université de Caen Normandie (UNICAEN), Normandie Université (NU)-Normandie Université (NU)-École Nationale Supérieure d'Ingénieurs de Caen (ENSICAEN), Normandie Université (NU)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Grand Accélérateur National d'Ions Lourds (GANIL), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), SAMURAI20, Normandie Université (NU)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), and Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)

Subjects
Physics, Superconductivity, History, Radionuclide, Spectrum analyzer, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 01 natural sciences, 010305 fluids & plasmas, Computer Science Applications, Education, Nuclear physics, Stack (abstract data type), 0103 physical sciences, Physics::Accelerator Physics, ddc:530, Neutron, Radio isotopes, 010306 general physics, Ground state, Nuclear Experiment, Beam (structure)
Abstract

27th International Nuclear Physics Conference, INPC2019, Glasgow, United Kingdom, 29 Jul 2019 - 2 Aug 2019; Journal of physics / Conference series 1643(1), 012106 (2020). doi:10.1088/1742-6596/1643/1/012106, Published by IOP Publ., Bristol

Published
2020
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5. Low-lying single-particle structure of 17C and the N = 14 sub-shell closure

Author

Q. Deshayes, N. Curtis, F. Rotaru, Maria Fisichella, Franck Delaunay, S. Bailey, X. Pereira-López, Takaharu Otsuka, M. Assié, L. Caceres, F. M. Marqués, S. Franchoo, B. Le Crom, Julien Gibelin, Eric Clément, L. Perrot, A. Gillibert, A. Corsi, P. Morfouace, J. Walshe, S. Leblond, I. Stefan, G. F. Grinyer, J. C. Thomas, N. de Séréville, Daisuke Suzuki, Y. Blumenfeld, J. Piot, A. M. Moro, A. Matta, F. Farget, D. Ramos, R. Borcea, J. Lois-Fuentes, C. Wheldon, M. Stanoiu, N. L. Achouri, B. Bastin, C. Stodel, E. C. Pollacco, W. N. Catford, N. A. Orr, O. Sorlin, V. Lapoux, T. Kokalova, Robin Smith, Toshio Suzuki, T. Roger, Marine Vandebrouck, B. Fernández-Domínguez, Natalia Timofeyuk, A. Knapton, M. Sénoville, J. Pancin, M. Caamaño, Martin Freer, J. A. Lay, F. Hammache, C. Rodriguez-Tajes, O. Kamalou, Universidad de Sevilla. Departamento de Física Atómica, Molecular y Nuclear, Consejo de Instalaciones Científicas y Tecnológicas de UKRI. Reino Unido, Agencia Estatal de Investigación. España, Ministerio de Economia, Industria y Competitividad (MINECO). España, Ministerio de Ciencia, Innovación y Universidades (MICINN). España, European Commission (EC). Fondo Europeo de Desarrollo Regional (FEDER), European Union (UE). H2020, Universidade de Santiago de Compostela [Spain] (USC ), 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), Laboratoire de Physique des 2 Infinis Irène Joliot-Curie (IJCLab), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), Département de Physique Nucléaire (ex SPhN) (DPHN), Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, 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
Physics, Nuclear and High Energy Physics, Valence (chemistry), 010308 nuclear & particles physics, SHELL model, Nuclear Theory, FOS: Physical sciences, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 01 natural sciences, 7. Clean energy, Molecular physics, lcsh:QC1-999, Excited state, 0103 physical sciences, Bound state, Neutron, Halo, Nuclear Experiment (nucl-ex), 010306 general physics, Ground state, Nuclear Experiment, ComputingMilieux_MISCELLANEOUS, lcsh:Physics
Abstract

The first investigation of the single-particle structure of the bound states of 17C, via the d(16C, p) transfer reaction, has been undertaken. The measured angular distributions confirm the spin-parity assignments of 1/2+ and 5/2+ for the excited states located at 217 and 335 keV, respectively. The spectroscopic factors deduced for these states exhibit a marked single-particle character, in agreement with shell model and particle-core model calculations, and combined with their near degeneracy in energy provide clear evidence for the absence of the N = 14 sub-shell closure. The very small spectroscopic factor found for the 3/2+ ground state is consistent with theoretical predictions and indicates that the {\nu}1d3/2 strength is carried by unbound states. With a dominant l = 0 valence neutron configuration and a very low separation energy, the 1/2+ excited state is a one-neutron halo candidate., Comment: 7 pages, 5 figures, Accepted for publication in Physics Letters B

Published
2020
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6. Extracting the spectral signature of α clustering in Ti44,48,52 using a continuous wavelet transform

Author

N. Curtis, Q. Deshayes, T. Kokalova, J. Walshe, Robin Smith, Neven Soić, Martin Freer, Asim Soylu, S. Bailey, L. Prepolec, V. Tokić, Lynda Achouri, Franck Delaunay, Marian Parlog, F. M. Marqués, Bertrand Jacquot, B. Fernández-Domínguez, and C. Wheldon

Subjects
Physics, Spectral signature, 010308 nuclear & particles physics, Nuclear state, Structure (category theory), Nuclear structure, 01 natural sciences, Resonant scattering, Computational physics, medicine.anatomical_structure, 0103 physical sciences, medicine, 010306 general physics, Cluster analysis, Nucleus, Continuous wavelet transform
Abstract

A novel technique has been developed, making use of the continuous wavelet transform to identify α-clustered states from resonant scattering measurements in regions of high nuclear state density. This technique expedites the investigation of α-clustering in medium mass and heavy nuclei, where the role that α-clustering plays in the structure of the nucleus is poorly understood. Here we report the application of this technique to measurements of the 4He(40,44,48Ca,α) resonant reactions, leading to an assessment of the α-cluster structure of 44,48,52Ti. Alpha-clustering was identified in 44Ti and 52Ti, but was observed to break down in 48Ti. The implications of these results are discussed.

Published
2019
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7. First Observation of B20 and B21

Author

T. Murakami, Tomio Kubo, Hiroshi Suzuki, Yosuke Kondo, Y. Shimizu, D. Kameda, K. Takahashi, Thomas Aumann, Q. Deshayes, Yasuhiro Togano, M Vandebrouck, P. Doornenbal, K. Muto, T. Isobe, T. Motobayashi, A. Navin, Hiroshi Sato, T. Kobayashi, Jongwon Hwang, S. K. Kim, J. Bonnard, N. A. Orr, D. Kanno, Hideaki Otsu, Y. Satou, A. G. Tuff, Naoki Fukuda, R. Minakata, Nagao Kobayashi, Julien Gibelin, Nicolas Michel, K. Yoneda, Franck Delaunay, Takashi Nakamura, F. M. Marqués, H. Baba, Ryuki Tanaka, S. Ogoshi, Satoshi Takeuchi, S. Nishi, N. L. Achouri, Noritsugu Nakatsuka, J.H. Lee, Daichi Murai, Naohito Inabe, H. Takeda, S. Leblond, and T. Nakashima

Subjects
Physics, education.field_of_study, Proton, 010308 nuclear & particles physics, Nuclear Theory, SHELL model, Population, General Physics and Astronomy, Resonance, Isotopes of boron, 01 natural sciences, 0103 physical sciences, Quark–gluon plasma, Neutron, Atomic physics, Nuclear Experiment, 010306 general physics, Nucleon, education
Abstract

The most neutron-rich boron isotopes ^{20}B and ^{21}B have been observed for the first time following proton removal from ^{22}N and ^{22}C at energies around 230 MeV/nucleon. Both nuclei were found to exist as resonances which were detected through their decay into ^{19}B and one or two neutrons. Two-proton removal from ^{22}N populated a prominent resonancelike structure in ^{20}B at around 2.5 MeV above the one-neutron decay threshold, which is interpreted as arising from the closely spaced 1^{-},2^{-} ground-state doublet predicted by the shell model. In the case of proton removal from ^{22}C, the ^{19}B plus one- and two-neutron channels were consistent with the population of a resonance in ^{21}B 2.47±0.19 MeV above the two-neutron decay threshold, which is found to exhibit direct two-neutron decay. The ground-state mass excesses determined for ^{20,21}B are found to be in agreement with mass surface extrapolations derived within the latest atomic-mass evaluations.

Published
2018
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8. Performance validation of the first arm of FALSTAFF: $^{252}$Cf and $^{235}$U fission fragment characterisation

Author

M. Kebbiri, Diane Doré, P. Legou, Michel Combet, A. Marcel, L. Thulliez, J-Ph. Mols, Q. Deshayes, S. Herlant, Stephan Oberstedt, E. Berthoumieux, X. Ledoux, M.O. Frégeau, J. Pancin, Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, Grand Accélérateur National d'Ions Lourds (GANIL), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), and Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)

Subjects
Physics, Spectrometer, 010308 nuclear & particles physics, Fission, Physics::Instrumentation and Detectors, QC1-999, Nuclear Theory, Nuclear data, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 01 natural sciences, 7. Clean energy, Neutron temperature, Nuclear physics, Prompt neutron, Nuclear fission, 0103 physical sciences, Neutron, 010306 general physics, Nuclear Experiment, Spontaneous fission
Abstract

The renewed interest for the study of nuclear fission is mainly motivated by the development of GEN-IV reactor concepts, mostly foreseen to operate in the fast neutron energy domain. To support this development, new high-quality nuclear data are needed. In this context, a new experimental setup, the FALSTAFF spectrometer, dedicated to the study of nuclear fission is under development. Employing the double-velocity (2V) and energy-velocity (EV) methods, the fission fragment mass before and after neutron evaporation will be deduced and the correlation between prompt neutron multiplicity and fragment mass will be determined. The first arm of the spectrometer is achieved. It is composed of two SED-MWPC detectors (a combination of a foil to produce secondary electrons and a Multi-Wire Proportional Chamber to detect them) and an axial ionization chamber. The SED-MWPC give access to the velocity (V) via time-of-flight and position measurements. The ionization chamber measures the fragment kinetic energy (E) and the energy loss profile. Preliminary results for spontaneous fission of 252Cf and from the thermal-neutron induced fission experiment on 235U, performed at the Orphée reactor (CEA-Saclay, France), are presented.

Published
2018
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9. Reaction Cross Section Of The Two-neutron Halo Nucleus 22C At 235 MeV/nucleon

Author

T. Isobe, D. Kanno, Shuichi Takeuchi, Jongwon Hwang, Marine Vandebrouck, Y. Shimizu, N. A. Orr, J.H. Lee, Yasuhiro Togano, A. G. Tuff, S. Leblond, T. Nakashima, K. Yoneda, Franck Delaunay, F. M. Marqués, S. Nishi, S. Ogoshi, H. Takeda, T. Murakami, S. K. Kim, Hiroshi Sato, T. Kobayashi, Hideaki Otsu, D. Kameda, P. Doornenbal, Naoki Fukuda, K. Takahashi, Q. Deshayes, K. Muto, N. Kobayashi, Atsumi Saito, T. Motobayashi, Julien Gibelin, H. Baba, Ryuki Tanaka, Terutaro Nakamura, H. Suzuki, R. Minakata, Noritsugu Nakatsuka, Daichi Murai, Yosuke Kondo, J. Tsubota, N. L. Achouri, J. A. Tostevin, A. Navin, Naohito Inabe, Yo Sato, Thomas Aumann, Tomio Kubo, Laboratoire de physique corpusculaire de Caen (LPCC), Université de Caen Normandie (UNICAEN), Normandie Université (NU)-Normandie Université (NU)-École Nationale Supérieure d'Ingénieurs de Caen (ENSICAEN), Normandie Université (NU)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Grand Accélérateur National d'Ions Lourds (GANIL), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Institut de Physique Nucléaire d'Orsay (IPNO), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Normandie Université (NU)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), and 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)

Subjects
Physics, Nuclear physics, Isotope, Sigma, Halo nucleus, Neutron, Radius, Halo, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], Nucleon, 7. Clean energy, Glauber
Abstract

The reaction cross section (σ R σR ) of the very neutron-rich carbon isotope 22 22 C has been measured on a carbon target at 235 MeV/nucleon. A σ R σR of 1.280±0.023 1.280±0.023 b was obtained for 22 22 C, significantly larger than those for the neighboring isotopes, supporting the halo character of 22 22 C. A 22 22 C root-mean-squared matter radius of 3.44±0.08 3.44±0.08 fm was deduced using a four-body Glauber reaction model. This value is smaller than an earlier estimate of 5.4±0.9 5.4±0.9 fm derived from a σ R σR measurement on a hydrogen target at 40 MeV/nucleon.

Published
2016
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