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7 results on '"Schmid, M. von"'

1. Nuclear reactions in the storage ring ESR with EXL

Author

Kröll, Th., Schmid, M. von, Zamora, J. C., 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., 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., Zenihiro, J., Kröll, Th., Schmid, M. von, Zamora, J. C., 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., 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., and Zenihiro, J.

Abstract

The EXL project aims to study nuclear structure by direct reactions in inverse kinematics at the storage rings of the future FAIR facility. In this contribution, we present the status of the project: the technical implementation at the ESR at GSI and preliminary results of the EXL campaign in 2012, the first using also a radioactive beam.

Published
2024

2. Quadrupole collectivity in neutron-rich Cd isotopes

Author

Bönig S., Ilieva S., Kröll T., Scheck M., Balabanski D., Bauer C., Blazhev A., Bloch T., Deleanu D., Diriken J., Fernier P., Gernhäuser R., Hadyńska-Kęk K., Jungclaus A., Lutter R., Negret A., Nowak K., Orlandi R., Pakarinen J., Rainovski G., Rodríguez T.R., Schmid M. von, Seidlitz M., Siebeck B., Simpson G.S., Sisón A. Illana, Stegmann R., Stora T., Thirolf P.G., Thürauf M., Vermeulen M.J., Voulot D., Warr N., Wenander F., and Witte H. De

Subjects
Physics, QC1-999
Abstract

The investigation of the excitation energies of the 21+ –states in the neutron-rich Cd isotopes shows an irregular behaviour when approaching the neutron shell-closure at N = 82. The energy of the 21+–state in 128Cd is lower than the one in 126Cd. The transition strength B(E2, 0gs+ → 21+) in the even isotopes 122−128Cd was measured in Coulomb excitation experiments with the high-purity germanium detector array MINIBALL at REXISOLDE (CERN). The values for 122,124Cd coincide with beyond-mean-field calculations with a resultant prolate deformation, whereas 126,128Cd are better described by shell-model calculations.

Published
2014
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3. First EXL experiment with stored radioactive beam: Proton scattering on 56Ni

Author

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., and Zenihiro J.

Subjects
Physics, QC1-999
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.

Published
2014
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4. Enhanced Quadrupole and Octupole Strength in Doubly Magic Sn-132

Author

Rosiak, D., Seidlitz, M., Reiter, Naïdja, H., Tsunoda, Y., Togashi, T., Nowacki, F., Otsuka, T., Colò, G., Arnswald, K., Berry, T., Blazhev, A., García Borge, María José, Cederkäll, J., Cox, D.M., Witte, H. de, Gaffney, L.P., Henrich, C., Hirsch, R., Huyse, M., Illana, A., Johnston, K., Kaya, L., Kröll, Th., Lozano Benito, M. L., Ojala, J., Pakarinen, J., Queiser, M., Rainovski, G., Rodriguez, J. A., Siebeck, B., Siesling, E., Snäll, J., Van Duppen, P., Vogt, A., Schmid, M. von, Warr, N., Wenander, F., Zell, K. O., Agencia Estatal de Investigación (España), Ministerio de Economía, Industria y Competitividad (España), Research Foundation - Flanders, Bonn-Cologne Graduate School of Physics and Astronomy, Academy of Finland, Bulgarian National Science Fund, RIKEN Nishina Center for Accelerator-Based Science, Ministry of Education, Culture, Sports, Science and Technology (Japan), Belgian Science Policy Office, European Commission, and Federal Ministry of Education and Research (Germany)

Abstract

6 pags., 4 figs., 1 tab. -- Open Access funded by Creative Commons Atribution Licence 4.0, The first 2(+) and 3(-) states of the doubly magic nucleus Sn-132 are populated via safe Coulomb excitation employing the recently commissioned HIE-ISOLDE accelerator at CERN in conjunction with the highly efficient MINIBALL array. The Sn-132 ions are accelerated to an energy of 5.49 MeV/nucleon and impinged on a Pb-206 target. Deexciting gamma rays from the low-lying excited states of the target and the projectile are recorded in coincidence with scattered particles. The reduced transition strengths are determined for the transitions 0(g.s)(+) -> 2(1)(+), 0(g.s)(+) -> 3(1)(-), and 2(1)(+) -> 3(1)(-) in Sn-132. The results on these states provide crucial information on cross-shell configurations which are determined within large-scale shell-model and Monte Carlo shell-model calculations as well as from random-phase approximation and relativistic random-phase approximation. The locally enhanced B(E2; 0(g.s)(+) -> 2(1)(+)) strength is consistent with the microscopic description of the structure of the respective states within all theoretical approaches. The presented results of experiment and theory can be considered to be the first direct verification of the sphericity and double magicity of Sn-132., The research leading to these results has received funding from the European Union’s Horizon 2020 research and innovation program under Grant Agreement No. 654002. This work was supported by the German BMBF under Contract No. 05P15PKCIA and Verbundprojekt No. 05P2015, in part by the High Performance Computing Infrastructure Strategic Program (Grant No. hp150224), in part by MEXT and Joint Institute for Computational Fundamental Science and a priority issue (elucidation of the fundamental laws and evolution of the universe) to be tackled by using the Post “K” Computer (Grants No. hp160211 and No. hp170230), in part by the HPCI system research project (Grant No. hp170182), by the CNS-RIKEN joint project for large-scale nuclear-structure calculations, in part by the Spanish Ministry of Economy, Industry and Competitiveness through Project No. FPA2017-87568-P, by FWO-Vlaanderen (Belgium), by GOA/2010/010 (BOF KU Leuven), and by the Interuniversity Attraction Poles Programme initiated by the Belgian Science Policy Office (BriX network P7/12). A. V. and L. K. thank the Bonn-Cologne Graduate School of Physics and Astronomy for financial support. J. P. and D. M. C. acknowledge the Academy of Finland (Contract No. 265023). G. R. acknowledges support by Bulgarian National Science Fund under Grant No. DN08/23/16. L. P. G. has received funding from the European Union’s Horizon 2020 research and innovation program under the Marie Skłodowska- Curie Grant Agreement No. 665779.

Published
2018

5. Enhanced Quadrupole and Octupole Strength in Doubly Magic Sn-132

Author

Agencia Estatal de Investigación (España), Ministerio de Economía, Industria y Competitividad (España), Research Foundation - Flanders, Bonn-Cologne Graduate School of Physics and Astronomy, Academy of Finland, Bulgarian National Science Fund, RIKEN Nishina Center for Accelerator-Based Science, Ministry of Education, Culture, Sports, Science and Technology (Japan), Belgian Science Policy Office, European Commission, Federal Ministry of Education and Research (Germany), Rosiak, D., Seidlitz, M., Reiter, P., Tsunoda, Y., Naïdja, H., Togashi, T., Nowacki, F., Otsuka, T., Coló, Georgina P., Arnswald, K., Berry, T., Blazhev, A., García Borge, María José, Cederkäll, J., Cox, D.M., Witte, H. de, Gaffney, L.P., Henrich, C., Hirsch, R., Huyse, M., Illana, A., Johnston, K., Kaya, L., Kröll, Th., Lozano Benito, M. L., Ojala, J., Pakarinen, J., Queiser, M., Rainovski, G., Rodríguez, J. A., Siebeck, B., Siesling, E., Snäll, J., Van Duppen, P., Vogt, A., Schmid, M. von, Warr, N., Wenander, F., Zell, K. O., Agencia Estatal de Investigación (España), Ministerio de Economía, Industria y Competitividad (España), Research Foundation - Flanders, Bonn-Cologne Graduate School of Physics and Astronomy, Academy of Finland, Bulgarian National Science Fund, RIKEN Nishina Center for Accelerator-Based Science, Ministry of Education, Culture, Sports, Science and Technology (Japan), Belgian Science Policy Office, European Commission, Federal Ministry of Education and Research (Germany), Rosiak, D., Seidlitz, M., Reiter, P., Tsunoda, Y., Naïdja, H., Togashi, T., Nowacki, F., Otsuka, T., Coló, Georgina P., Arnswald, K., Berry, T., Blazhev, A., García Borge, María José, Cederkäll, J., Cox, D.M., Witte, H. de, Gaffney, L.P., Henrich, C., Hirsch, R., Huyse, M., Illana, A., Johnston, K., Kaya, L., Kröll, Th., Lozano Benito, M. L., Ojala, J., Pakarinen, J., Queiser, M., Rainovski, G., Rodríguez, J. A., Siebeck, B., Siesling, E., Snäll, J., Van Duppen, P., Vogt, A., Schmid, M. von, Warr, N., Wenander, F., and Zell, K. O.

Abstract

The first 2(+) and 3(-) states of the doubly magic nucleus Sn-132 are populated via safe Coulomb excitation employing the recently commissioned HIE-ISOLDE accelerator at CERN in conjunction with the highly efficient MINIBALL array. The Sn-132 ions are accelerated to an energy of 5.49 MeV/nucleon and impinged on a Pb-206 target. Deexciting gamma rays from the low-lying excited states of the target and the projectile are recorded in coincidence with scattered particles. The reduced transition strengths are determined for the transitions 0(g.s)(+) -> 2(1)(+), 0(g.s)(+) -> 3(1)(-), and 2(1)(+) -> 3(1)(-) in Sn-132. The results on these states provide crucial information on cross-shell configurations which are determined within large-scale shell-model and Monte Carlo shell-model calculations as well as from random-phase approximation and relativistic random-phase approximation. The locally enhanced B(E2; 0(g.s)(+) -> 2(1)(+)) strength is consistent with the microscopic description of the structure of the respective states within all theoretical approaches. The presented results of experiment and theory can be considered to be the first direct verification of the sphericity and double magicity of Sn-132.

Published
2018

6. Nuclear transfer reaction measurements at the ESR—for the investigation of the astrophysical15O(α,γ)19Ne reaction

Author

Doherty, D T, primary, Woods, P J, additional, Litvinov, Yu A, additional, Najafi, M Ali, additional, Bagchi, S, additional, Bishop, S, additional, Bo, M, additional, Brandau, C, additional, Davinson, T, additional, Dillmann, I, additional, Estrade, A, additional, Egelhof, P, additional, Evdokimov, A, additional, Gumberidze, A, additional, Heil, M, additional, Lederer, C, additional, Litvinov, S A, additional, Lotay, G, additional, Kalantar-Nayestanaki, N, additional, Kiselev, O, additional, Kozhuharov, C, additional, Kröll, T, additional, Mahjour-Shafei, M, additional, Mutterer, M, additional, Nolden, F, additional, Petridis, N, additional, Popp, U, additional, Reifarth, R, additional, Rigollet, C, additional, Roy, S, additional, Steck, M, additional, Stöhlker, Th, additional, Streicher, B, additional, Trotsenko, S, additional, Schmid, M von, additional, Yan, X L, additional, and Zamora, J C, additional

Published
2015
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7. Determination of theB(E3, 0+→ 3−)-excitation strength in octupole-correlated nuclei nearA≈ 224 by the means of Coulomb excitation at REX-ISOLDE

Author

Scheck, M, primary, Gaffney, L P, additional, Butler, P A, additional, Hayes, A B, additional, Wenander, F, additional, Albers, M, additional, Bastin, B, additional, Bauer, C, additional, Blazhev, A, additional, Bönig, S, additional, Bree, N, additional, Cederkäil, J, additional, Chupp, T, additional, Cline, D, additional, Cocolios, T E, additional, Davinson, T, additional, Witte, H De, additional, Diriken, J, additional, Grahn, T, additional, Gregor, E T, additional, Herzan, A, additional, Huyse, M, additional, Jenkins, D G, additional, Joss, D T, additional, Kesteloot, N, additional, Konki, J, additional, Kowalczyk, M, additional, Kröll, Th, additional, Kwan, E, additional, Lutter, R, additional, Moschner, K, additional, Napiorkowski, P, additional, Pakarinen, J, additional, Pfeiffer, M, additional, Radeck, D, additional, Reiter, P, additional, Reynders, K, additional, Rigby, S V, additional, Robledo, L M, additional, Rudigier, M, additional, Sambi, S, additional, Seidlitz, M, additional, Siebeck, B, additional, Stora, T, additional, Thoele, P, additional, Duppen, P Van, additional, Vermeulen, M J, additional, Schmid, M von, additional, Voulot, D, additional, Warr, N, additional, Wimmer, K, additional, Wrzosek-Lipska, K, additional, Wu, C Y, additional, and Zielińska, M, additional

Published
2014
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