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  1. Article ; Online: Proton Distribution Radii of ^{16-24}O: Signatures of New Shell Closures and Neutron Skin.

    Kaur, S / Kanungo, R / Horiuchi, W / Hagen, G / Holt, J D / Hu, B S / Miyagi, T / Suzuki, T / Ameil, F / Atkinson, J / Ayyad, Y / Bagchi, S / Cortina-Gil, D / Dillmann, I / Estradé, A / Evdokimov, A / Farinon, F / Geissel, H / Guastalla, G /
    Janik, R / Knöbel, R / Kurcewicz, J / Litvinov, Yu A / Marta, M / Mostazo, M / Mukha, I / Nociforo, C / Ong, H J / Otsuka, T / Pietri, S / Prochazka, A / Scheidenberger, C / Sitar, B / Strmen, P / Takechi, M / Tanaka, J / Tanihata, I / Terashima, S / Vargas, J / Weick, H / Winfield, J S

    Physical review letters

    2022  Volume 129, Issue 14, Page(s) 142502

    Abstract: The root mean square radii of the proton density distribution in ^{16-24}O derived from measurements of charge changing cross sections with a carbon target at ∼900A  MeV together with the matter radii portray thick neutron skin for ^{22-24}O despite ^{22, ...

    Abstract The root mean square radii of the proton density distribution in ^{16-24}O derived from measurements of charge changing cross sections with a carbon target at ∼900A  MeV together with the matter radii portray thick neutron skin for ^{22-24}O despite ^{22,24}O being doubly magic. Imprints of the shell closures at N=14 and 16 are reflected in local minima of their proton radii that provide evidence for the tensor interaction causing them. The radii agree with ab initio calculations employing the chiral NNLO_{sat} interaction, though skin thickness predictions are challenged. Shell model predictions agree well with the data.
    MeSH term(s) Carbon ; Neutrons ; Protons
    Chemical Substances Protons ; Carbon (7440-44-0)
    Language English
    Publishing date 2022-10-14
    Publishing country United States
    Document type Journal Article
    ZDB-ID 208853-8
    ISSN 1079-7114 ; 0031-9007
    ISSN (online) 1079-7114
    ISSN 0031-9007
    DOI 10.1103/PhysRevLett.129.142502
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article ; Online: Recent Precision Experiments with Exotic Nuclei Produced with Uranium Projectiles and Experimental Prospects at Fair

    Geissel H. / Chen L. / Dickel T. / Farinon F. / Dillmann I. / Knöbel R. / Kurcewicz J. / Mukha I. / Münzenberg G. / Nociforo C. / Patyk Z. / Pietri S. / Plass W.R. / Prochazka A. / Scheidenberger C. / Takechi M. / Weick H. / Winfield J.S. / Winkler M.

    EPJ Web of Conferences, Vol 66, p

    2014  Volume 01005

    Abstract: Precision experiments with relativistic fragments separated in-flight require special experimentalmethods to overcome the inherent large emittance from the creation in nuclear reactions and atomic interactions in matter. At GSI relativistic exotic nuclei ...

    Abstract Precision experiments with relativistic fragments separated in-flight require special experimentalmethods to overcome the inherent large emittance from the creation in nuclear reactions and atomic interactions in matter. At GSI relativistic exotic nuclei have been produced via uranium projectile fragmentation and fission and investigated with the inflight separator FRS directly, or in combination with either the storage-cooler ring ESR or the FRS Ion Catcher. 1000 A·MeV 238U ions were used to create 60 new neutron-rich isotopes separated and identified with the FRS to measure their production cross sections. In another experimental campaign the fragments were separated in flight and injected into the storage-cooler ring ESR for accurate mass and lifetime measurements. In these experimentswe have obtained accurate new mass values analyzed via a novel method which has reduced the systematic errors for both Schottky Mass Spectrometry (SMS) and for Isochronous Mass Spectrometry (IMS). Pioneering experiments have been carried out with the FRS Ion Catcher consisting of three experimental components, the dispersive magnetic system of the FRS with a monoenergetic and a homogeneous degrader, a cryogenic stopping cell filled with pure helium and a multiple-reflection time-of flight mass separator. The FRS Ion Catcher enables high precision spectroscopy experiments with eV to keV exotic nuclides. Results from these different FRS experiments are presented in this overview together with prospects for the next-generation facility Super-FRS. The novel features of the Super-FRS compared with the present FRS will be discussed in addition.
    Keywords Physics ; QC1-999 ; Science ; Q
    Language English
    Publishing date 2014-03-01T00:00:00Z
    Publisher EDP Sciences
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  3. Article ; Online: Towards the Limits of Existence of Nuclear Structure: Observation and First Spectroscopy of the Isotope ^{31}K by Measuring Its Three-Proton Decay.

    Kostyleva, D / Mukha, I / Acosta, L / Casarejos, E / Chudoba, V / Ciemny, A A / Dominik, W / Dueñas, J A / Dunin, V / Espino, J M / Estradé, A / Farinon, F / Fomichev, A / Geissel, H / Gorshkov, A / Grigorenko, L V / Janas, Z / Kamiński, G / Kiselev, O /
    Knöbel, R / Krupko, S / Kuich, M / Litvinov, Yu A / Marquinez-Durán, G / Martel, I / Mazzocchi, C / Nociforo, C / Ordúz, A K / Pfützner, M / Pietri, S / Pomorski, M / Prochazka, A / Rymzhanova, S / Sánchez-Benítez, A M / Scheidenberger, C / Simon, H / Sitar, B / Slepnev, R / Stanoiu, M / Strmen, P / Szarka, I / Takechi, M / Tanaka, Y K / Weick, H / Winkler, M / Winfield, J S / Xu, X / Zhukov, M V

    Physical review letters

    2019  Volume 123, Issue 9, Page(s) 92502

    Abstract: The most remote isotope from the proton dripline (by 4 atomic mass units) has been observed: ^{31}K. It is unbound with respect to three-proton (3p) emission, and its decays have been detected in flight by measuring the trajectories of all decay products ...

    Abstract The most remote isotope from the proton dripline (by 4 atomic mass units) has been observed: ^{31}K. It is unbound with respect to three-proton (3p) emission, and its decays have been detected in flight by measuring the trajectories of all decay products using microstrip detectors. The 3p emission processes have been studied by the means of angular correlations of ^{28}S+3p and the respective decay vertices. The energies of the previously unknown ground and excited states of ^{31}K have been determined. This provides its 3p separation energy value S_{3p} of -4.6(2)  MeV. Upper half-life limits of 10 ps of the observed ^{31}K states have been derived from distributions of the measured decay vertices.
    Language English
    Publishing date 2019-09-19
    Publishing country United States
    Document type Journal Article
    ZDB-ID 208853-8
    ISSN 1079-7114 ; 0031-9007
    ISSN (online) 1079-7114
    ISSN 0031-9007
    DOI 10.1103/PhysRevLett.123.092502
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  4. Article ; Online: Proton Distribution Radii of ^{12-19}C Illuminate Features of Neutron Halos.

    Kanungo, R / Horiuchi, W / Hagen, G / Jansen, G R / Navratil, P / Ameil, F / Atkinson, J / Ayyad, Y / Cortina-Gil, D / Dillmann, I / Estradé, A / Evdokimov, A / Farinon, F / Geissel, H / Guastalla, G / Janik, R / Kimura, M / Knöbel, R / Kurcewicz, J /
    Litvinov, Yu A / Marta, M / Mostazo, M / Mukha, I / Nociforo, C / Ong, H J / Pietri, S / Prochazka, A / Scheidenberger, C / Sitar, B / Strmen, P / Suzuki, Y / Takechi, M / Tanaka, J / Tanihata, I / Terashima, S / Vargas, J / Weick, H / Winfield, J S

    Physical review letters

    2016  Volume 117, Issue 10, Page(s) 102501

    Abstract: Proton radii of ^{12-19}C densities derived from first accurate charge changing cross section measurements at 900A  MeV with a carbon target are reported. A thick neutron surface evolves from ∼0.5  fm in ^{15}C to ∼1  fm in ^{19}C. The halo radius in ^{ ... ...

    Abstract Proton radii of ^{12-19}C densities derived from first accurate charge changing cross section measurements at 900A  MeV with a carbon target are reported. A thick neutron surface evolves from ∼0.5  fm in ^{15}C to ∼1  fm in ^{19}C. The halo radius in ^{19}C is found to be 6.4±0.7  fm as large as ^{11}Li. Ab initio calculations based on chiral nucleon-nucleon and three-nucleon forces reproduce the radii well.
    Language English
    Publishing date 2016-09-02
    Publishing country United States
    Document type Journal Article
    ZDB-ID 208853-8
    ISSN 1079-7114 ; 0031-9007
    ISSN (online) 1079-7114
    ISSN 0031-9007
    DOI 10.1103/PhysRevLett.117.102501
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  5. Article ; Online: SOFIA

    Pellereau E. / Bélier G. / Boutoux G. / Chatillon A. / Ebran A. / Gorbinet T. / Laurent B. / Martin J.-F. / Taieb J. / Audouin L. / Tassan-Got L. / Jurado B. / Álvarez-Pol H. / Ayyad Y. / Benlliure J. / Caamaño M. / Cortina-Gil D. / Fernández-Domínguez B. / Paradela C. /
    Rodríguez-Sánchez J.L. / Vargas J. / Casarejos E. / Heinz A. / Kelić-Heil A. / Kurz N. / Nociforo C. / Pietri S. / Prochazka A. / Rossi D. / Schmidt K.-H. / Simon H. / Voss B. / Weick H. / Winfield J.S.

    EPJ Web of Conferences, Vol 62, p

    An innovative setup to measure complete isotopic yield of fission fragments

    2013  Volume 06005

    Abstract: We performed an experiment dedicated to the accurate isotopic yield measurement of fission fragments over the whole range. SOFIA exploits the inverse kinematics technique: using heavy ion beams at relativistic energies, fission is induced by Coulomb ... ...

    Abstract We performed an experiment dedicated to the accurate isotopic yield measurement of fission fragments over the whole range. SOFIA exploits the inverse kinematics technique: using heavy ion beams at relativistic energies, fission is induced by Coulomb excitation in a high-Z target. The fragments are emitted forward and both of them are identified in charge and mass. The setup will be presented, as well as preliminary spectra.
    Keywords Physics ; QC1-999 ; Science ; Q ; DOAJ:Physics (General) ; DOAJ:Physics and Astronomy
    Language English
    Publishing date 2013-12-01T00:00:00Z
    Publisher EDP Sciences
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  6. Article ; Online: Proton radii of (12-17)B define a thick neutron surface in ¹⁷B.

    Estradé, A / Kanungo, R / Horiuchi, W / Ameil, F / Atkinson, J / Ayyad, Y / Cortina-Gil, D / Dillmann, I / Evdokimov, A / Farinon, F / Geissel, H / Guastalla, G / Janik, R / Kimura, M / Knöbel, R / Kurcewicz, J / Litvinov, Yu A / Marta, M / Mostazo, M /
    Mukha, I / Nociforo, C / Ong, H J / Pietri, S / Prochazka, A / Scheidenberger, C / Sitar, B / Strmen, P / Suzuki, Y / Takechi, M / Tanaka, J / Tanihata, I / Terashima, S / Vargas, J / Weick, H / Winfield, J S

    Physical review letters

    2014  Volume 113, Issue 13, Page(s) 132501

    Abstract: The first determination of radii of point proton distribution (proton radii) of (12-17)B from charge-changing cross sections (σ(CC)) measurements at the FRS, GSI, Darmstadt is reported. The proton radii are deduced from a finite-range Glauber model ... ...

    Abstract The first determination of radii of point proton distribution (proton radii) of (12-17)B from charge-changing cross sections (σ(CC)) measurements at the FRS, GSI, Darmstadt is reported. The proton radii are deduced from a finite-range Glauber model analysis of the σ(CC). The radii show an increase from ¹³B to ¹⁷B and are consistent with predictions from the antisymmetrized molecular dynamics model for the neutron-rich nuclei. The measurements show the existence of a thick neutron surface with neutron-proton radius difference of 0.51(0.11) fm in ¹⁷B.
    Language English
    Publishing date 2014-09-26
    Publishing country United States
    Document type Journal Article
    ZDB-ID 208853-8
    ISSN 1079-7114 ; 0031-9007
    ISSN (online) 1079-7114
    ISSN 0031-9007
    DOI 10.1103/PhysRevLett.113.132501
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  7. Article ; Online: Study of Ground State Wave-function of the Neutron-rich 29,30Na Isotopes through Coulomb Breakup

    Rahaman A. / Datta Pramanik U. / Aumann T. / Beceiro S. / Boretzky K. / Caesar C. / Carlson B.V. / Catford W.N. / Chakraborty S. / Chatterjee S. / Chartier M. / Angelis G.De. / Cortina-Gil D. / Gonzalez-Diaz D. / Emling H. / Diaz Fernandez P. / Fraile L.M. / Ershova O. / Geissel H. /
    Heil M. / Jonson B. / Kelic A. / Johansson H. / Kruecken R. / Kroll T. / Kurcewicz J. / Langer C. / Bleis T.Le / Leifels Y. / Munzenberg G. / Marganiec J. / Nociforo C. / Najafi A. / Panin V. / Paschalis S. / Pietri S. / Plag R. / Reifarth R. / Ricciardi V. / Rossi D. / Ray J. / Simon H. / Scheidenberge C. / Typel S. / Taylor J. / Togano Y. / Volkov V. / Weick H. / Wagner A. / Wamers F. / Weigand M. / Winfield J.S. / Yakorev D. / Zoric M.

    EPJ Web of Conferences, Vol 66, p

    2014  Volume 02087

    Abstract: Coulomb breakup of unstable neutron rich nuclei 29,30Na around the ‘island of inversion’ has been studied at energy around 434 MeV/nucleon and 409 MeV/nucleon respectively. Four momentum vectors of fragments, decay neutron from excited projectile and γ- ... ...

    Abstract Coulomb breakup of unstable neutron rich nuclei 29,30Na around the ‘island of inversion’ has been studied at energy around 434 MeV/nucleon and 409 MeV/nucleon respectively. Four momentum vectors of fragments, decay neutron from excited projectile and γ-rays emitted from excited fragments after Coulomb breakup are measured in coincidence. For these nuclei, the low-lying dipole strength above one neutron threshold can be explained by direct breakup model. The analysis for Coulomb breakup of 29,30Na shows that large amount of the cross section yields the 28Na, 29Na core in ground state. The predominant ground-state configuration of 29,30Na is found to be 28Na(g.s)⊗νs1/2 and 29Na(g.s)⊗νs1/2,respectively.
    Keywords Physics ; QC1-999 ; Science ; Q
    Language English
    Publishing date 2014-03-01T00:00:00Z
    Publisher EDP Sciences
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  8. Article ; Online: Ground-state configuration of neutron-rich Aluminum isotopes through Coulomb Breakup

    Chakraborty S. / Pramanik U. Datta / Aumann T. / Beceiro S. / Boretzky K. / Caesar C. / Carlson B.V. / Catford W. N. / Chatterjee S. / Chartier M . / Cortina-Gil D. / Angelis G.De. / Gonzalez-Diaz D. / Emling H. / Fernandez P. Diaz / Fraile L. M. / Ershova O. / Geissel H. / Heil M. /
    Jonson B. / Kelic A. / Johansson H. / Kruecken R. / Kroll T. / Kurcewicz J. / Langer C. / Bleis T. Le / Leifels Y. / Munzenberg G. / Marganiec J. / Nociforo C. / Najafi A. / Panin V. / Paschalis S. / Pietri S. / Plag R. / Rahaman A. / Reifarth R. / Ricciardi V. / Rossi D. / Ray J. / Simon H. / Scheidenberger C. / Typel S. / Taylor J. / Togano Y. / Volkov V. / Weick H. / Wagner A. / Wamers F. / Weigand M. / Winfield J. S. / Yakorev D. / Zoric M.

    EPJ Web of Conferences, Vol 66, p

    2014  Volume 02019

    Abstract: Neutron-rich 34,35Al isotopes have been studied through Coulomb excitation using LAND-FRS setup at GSI, Darmstadt. The method of invariant mass analysis has been used to reconstruct the excitation energy of the nucleus prior to decay. Comparison of ... ...

    Abstract Neutron-rich 34,35Al isotopes have been studied through Coulomb excitation using LAND-FRS setup at GSI, Darmstadt. The method of invariant mass analysis has been used to reconstruct the excitation energy of the nucleus prior to decay. Comparison of experimental CD cross-section with direct breakup model calculation with neutron in p3/2 orbital favours 34Al(g.s)⊗νp3/2 as ground state configuration of 35Al. But ground state configuration of 34Al is complicated as evident from γ-ray spectra of 33Al after Coulomb breakup of 34Al.
    Keywords Physics ; QC1-999 ; Science ; Q
    Language English
    Publishing date 2014-03-01T00:00:00Z
    Publisher EDP Sciences
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  9. Article ; Online: First EXL experiment with stored radioactive beam

    Schmid M. von / Bagchi S. / Bönig S. / Csatlós M. / Dillmann I. / Dimopoulou C. / Egelhof P. / Eremin V. / Furuno T. / Geissel H. / Gernhäuser R. / Harakeh M. N. / Hartig A.-L. / Ilieva S. / Kalantar-Nayestanaki N. / Kiselev O. / Kollmus H. / Kozhuharov C. / Krasznahorkay A. /
    Kröll T. / Kuilman M. / Litvinov S. / Litvinov Yu. A. / Mahjour-Shafiei M. / Mutterer M. / Nagae D. / Najafi M. A. / Nociforo C. / Nolden F. / Popp U. / Rigollet C. / Roy S. / Scheidenberger C. / Steck M. / Streicher B. / Stuhl L. / Thürauf M. / Uesaka T. / Weick H. / Winfield J. S. / Winters D. / Woods P. J. / Yamaguchi T. / Yue K. / Zamora J. C. / Zenihiro J.

    EPJ Web of Conferences, Vol 66, p

    Proton scattering on 56Ni

    2014  Volume 03093

    Abstract: EXL (EXotic nuclei studied in Light-ion induced reactions at the NESR storage ring) is a project within NUSTAR at FAIR. It aims at investigations of light-ion induced direct reactions in inverse kinematics with radioactive ions cooled and stored in the ... ...

    Abstract EXL (EXotic nuclei studied in Light-ion induced reactions at the NESR storage ring) is a project within NUSTAR at FAIR. It aims at investigations of light-ion induced direct reactions in inverse kinematics with radioactive ions cooled and stored in the future NESR (New Experimental Storage Ring). The existing ESR (Experimental Storage Ring) at GSI, together with its internal gas-jet target, provides a unique opportunity to perform such kind of experiments on a smaller scale at the present time. We have developed a UHV-compatible (Ultra High Vacuum) detector setup mainly based on DSSDs (Double-sided Silicon-Strip Detector) for the target-like recoils [4]. With this setup we were able to successfully investigate reactions with a stored radioactive beam for the first time ever. As a part of the first EXL campaign we investigated the reaction 56Ni(p,p)56Ni in inverse kinematics in order to measure the differential cross section for elastic proton scattering and deduce the nuclear-matter distribution and radius of 56Ni. In the following, the experimental setup is introduced in more detail, and the current status of the ongoing analysis is discussed.
    Keywords Physics ; QC1-999 ; Science ; Q
    Subject code 540
    Language English
    Publishing date 2014-03-01T00:00:00Z
    Publisher EDP Sciences
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  10. Article ; Online: Measurement of Excitation Spectra in the ^{12}C(p,d) Reaction near the η^{'} Emission Threshold.

    Tanaka, Y K / Itahashi, K / Fujioka, H / Ayyad, Y / Benlliure, J / Brinkmann, K-T / Friedrich, S / Geissel, H / Gellanki, J / Guo, C / Gutz, E / Haettner, E / Harakeh, M N / Hayano, R S / Higashi, Y / Hirenzaki, S / Hornung, C / Igarashi, Y / Ikeno, N /
    Iwasaki, M / Jido, D / Kalantar-Nayestanaki, N / Kanungo, R / Knöbel, R / Kurz, N / Metag, V / Mukha, I / Nagae, T / Nagahiro, H / Nanova, M / Nishi, T / Ong, H J / Pietri, S / Prochazka, A / Rappold, C / Reiter, M P / Rodríguez-Sánchez, J L / Scheidenberger, C / Simon, H / Sitar, B / Strmen, P / Sun, B / Suzuki, K / Szarka, I / Takechi, M / Tanihata, I / Terashima, S / Watanabe, Y N / Weick, H / Widmann, E / Winfield, J S / Xu, X / Yamakami, H / Zhao, J

    Physical review letters

    2016  Volume 117, Issue 20, Page(s) 202501

    Abstract: Excitation spectra of ^{11}C are measured in the ^{12}C(p,d) reaction near the η^{'} emission threshold. A proton beam extracted from the synchrotron SIS-18 at GSI with an incident energy of 2.5 GeV impinges on a carbon target. The momenta of deuterons ... ...

    Abstract Excitation spectra of ^{11}C are measured in the ^{12}C(p,d) reaction near the η^{'} emission threshold. A proton beam extracted from the synchrotron SIS-18 at GSI with an incident energy of 2.5 GeV impinges on a carbon target. The momenta of deuterons emitted at 0° are precisely measured with the fragment separator (FRS) operated as a spectrometer. In contrast to theoretical predictions on the possible existence of deeply bound η^{'}-mesic states in carbon nuclei, no distinct structures are observed associated with the formation of bound states. The spectra are analyzed to set stringent constraints on the formation cross section and on the hitherto barely known η^{'}-nucleus interaction.
    Language English
    Publishing date 2016-11-11
    Publishing country United States
    Document type Journal Article
    ZDB-ID 208853-8
    ISSN 1079-7114 ; 0031-9007
    ISSN (online) 1079-7114
    ISSN 0031-9007
    DOI 10.1103/PhysRevLett.117.202501
    Database MEDical Literature Analysis and Retrieval System OnLINE

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