Nuclear radii of 17,19B and 14Be |
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| Institution: | 1. The Institute of Physical and Chemical Research (RIKEN), Wako, Saitama 351-0198, Japan;2. Gesellschaft für Schwerionenforschung (GSI), D-64291 Darmstadt, Germany;3. Kurchatov Institute, Kurchatov sq. 1, 123182 Moscow, Russian Federation;4. Faculty of Mathematic and Physics, Comenius University, 84255 Bratislava, Slovak Republic;5. Faculty of Science, Osaka University, Osaka 560-0043, Japan;6. Faculty of Engineering, Nagasaki Institute of Applied Science, Nagasaki 851-0193, Japan;1. Instituto Tecnológico de Aeronáutica, DCTA, 12228-900 São José dos Campos, Brazil;2. Laboratório de Física Teórica e Computacional – LFTC, Universidade Cruzeiro do Sul, 01506-000 São Paulo, Brazil;3. Lebedev Physical Institute, Leninsky Prospekt 53, 119991 Moscow, Russia;1. Division of Nuclear Physics, Physics Department, Lund University, Box 118, SE-221 00 Lund, Sweden;2. Linköping University, Department of Physics, Chemistry and Biology, SE-58183 Linköping, Sweden;3. Graphensic AB, Teknikringen 1F, SE-58330 Linköping, Sweden;4. Sensor System, ACREO Swedish ICT AB, Box 1070, SE-164 25 Kista, Sweden;1. A.I. Alikhanyan National Science Laboratory, Yerevan 0036, Armenia;2. Institut fur Kernphysik, Johannes Gutenberg Universität, 55099 Mainz, Germany;3. Department of Physics,Tohoku University, Sendai 980-8578, Japan;4. School of Physics and Astronomy,University of Glasgow, G12 8QQ, Scotland, UK;1. Instituto Tecnológico de Aeronáutica, DCTA, 12228-900, S. José dos Campos, Brazil;2. Department of Physics and Astronomy, Aarhus University, DK-8000 Aarhus C, Denmark;3. Instituto de Física Teórica, UNESP – Universidade Estadual Paulista, 01156-970, São Paulo, Brazil;4. Centro de Ciências Naturais e Humanas, Universidade Federal do ABC, 09210-580, Santo André, Brazil;1. Department of Physics, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan;2. RIKEN Nishina Center, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan;3. Instituto de Estructura de la Materia, CSIC, E-28006 Madrid, Spain;4. GSI Helmholtzzentrum für Schwerionenforschung GmbH, Planckstr. 1, D-64291 Darmstadt, Germany;5. Institut für Kernphysik, Technische Universität Darmstadt, D-64289 Darmstadt, Germany;6. IRFU, CEA, Université Paris-Saclay, F-91191 Gif-sur-Yvette, France;7. Dipartimento di Fisica, Università degli Studi di Milano, Via Celoria 16, I-20133 Milano, Italy;8. INFN, Sezione di Milano, Via Celoria 16, I-20133 Milano, Italy;9. Department of Physics, University of Surrey, Guildford, GU2 7XH, United Kingdom;10. KU Leuven, Department of Physics and Astronomy, Instituut voor Kern- en Stralingsfysica, B-3001 Leuven, Belgium;11. TRIUMF, 4004 Wesbrook Mall, Vancouver, BC V6T 2A3, Canada;12. Department of Physics, McGill University, Montréal, QC H3A 2T8, Canada;13. Research Center for Nuclear Physics (RCNP), Osaka University, Ibaraki 567-0047, Japan;14. Department of Physics, Osaka City University, Osaka 558-8585, Japan;15. Nambu Yoichiro Institute of Theoretical and Experimental Physics (NITEP), Osaka City University, Osaka 558-8585, Japan;p. Center for Nuclear Study, University of Tokyo, RIKEN campus, Wako, Saitama 351-0198, Japan;q. Advanced Science Research Center, Japan Atomic Energy Agency, Tokai, Ibaraki 319-1195, Japan;r. LPC Caen, Normandie Univ, ENSICAEN, UNICAEN, CNRS/IN2P3, 14000 Caen, France;s. State Key Laboratory of Nuclear Physics and Technology, Peking University, Beijing 100871, China;t. Department of Physics, Tohoku University, Sendai 980-8578, Japan;u. Department of Physics, Royal Institute of Technology, SE-10691 Stockholm, Sweden;v. Université Paris-Saclay, CNRS/IN2P3, IJCLab, 91405 Orsay, France;w. Laboratoire Kastler Brossel, Sorbonne Université, CNRS, ENS-PSL Research University, Collège de France, Case 74; 4, place Jussieu, F-75005 Paris, France;x. Universidad Nacional de Colombia, Carr. 30 No. 45-03, Bogotá, Colombia;y. Department of Physics, Rikkyo University, 3-34-1 Nishi-Ikebukuro, Toshima, Tokyo 172-8501, Japan;z. Institute for Nuclear Science & Technology, VINATOM, 179 Hoang Quoc Viet, Cau Giay, Hanoi, Viet Nam;11. Ruđer Bošković Institute, Bijenička cesta 54, 10000 Zagreb, Croatia;12. Institut für Kernphysik, Universität zu Köln, D-50937 Cologne, Germany;13. Ewha Womans University, Seoul 120-750, South Korea;14. Institute for Basic Science, Daejeon 34126, South Korea;15. Department of Physics, Tokyo Institute of Technology, 2-12-1 O-Okayama, Meguro, Tokyo, 152-8551, Japan;16. Department of Physics, The University of Hong Kong, Pokfulam, Hong Kong;17. Department of Physics, University of Oslo, N-0316 Oslo, Norway;18. Institute for Nuclear Research, Atomki, P.O. Box 51, Debrecen H-4001, Hungary;19. Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou, China |
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| Abstract: | The interaction cross sections (σI) of light radioactive nuclei close to the neutron drip line (17,19B, 14Be) have been measured at around 800A MeV. The effective root-mean-square (r.m.s.) matter radii of these nuclei have been deduced from σI by two different methods, a Glauber-type calculation based on the optical limit approximation and a few-body reaction model. The deduced radii from both approaches agree with each other within experimental uncertainty. The r.m.s. radii of 17B (2.99±0.09 fm) and of 14Be (3.10±0.15 fm) in this work are consistent with the previously determined values, and have a higher accuracy. The r.m.s. radius of 19B (3.11±0.13 fm) was newly determined. Assuming a “core plus 2n” structure in 17B and 14Be, the mixing of ν(2s1/2) and ν(1d5/2) was studied and the s-wave spectroscopic factor is found to be 36±19% and 47±25%, respectively. A valence radius analysis suggests a “core plus 4n” structure in 19B. |
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