Abstract
We present the discovery of a new isotope of \(^{98}\)Sn beyond the double-magic N = Z = 50 nucleus \(^{100}\)Sn. \(^{98}\)Sn was identified among the projectile-fragmentation products of a \(^{124}\)Xe beam at 345 MeV/nucleon at the RI Beam Factory, RIKEN, Japan. Additionally, we have confirmed the production of \(^{96}\)In and \(^{94}\)Cd, previously reported as new isotopes at RIKEN. These highly proton-rich nuclei were separated and identified using the large-acceptance two-stage separator BigRIPS. Furthermore, we have determined the cross sections of \(^{98}\)Sn and its neighboring nuclei. These experimental values were compared to the semi-empirical cross-section formula EPAX3.1a, resulting in a reduction of the predicted cross sections by roughly a factor of 5.
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1 RIKEN Nishina Center for Accelerator-Based Science, RIKEN, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan; [email protected] [email protected]
2 RIKEN Nishina Center for Accelerator-Based Science, RIKEN, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
3 RIKEN Nishina Center for Accelerator-Based Science, RIKEN, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan; Center for Exotic Nuclear Studies, Institute for Basic Science, 55 Expo-ro, Doryong, Yuseong-gu, Daejeon 34126, Republic of Korea
4 Instituto de Física Corpuscular, CSIC-Universitat de Valéncia, Parc Científic de la Universitat de València, C/ Catedrático José Beltrán, 2, E-46980 Paterna, Spain; HUN-REN, Institute for Nuclear Research (ATOMKI), P.O. Box 51, 4001 Debrecen, Hungary
5 Instituto de Física Corpuscular, CSIC-Universitat de Valéncia, Parc Científic de la Universitat de València, C/ Catedrático José Beltrán, 2, E-46980 Paterna, Spain
6 SUBATECH, IMT Atlantique, Université de Nantes, 4, rue Alfred Kastler, 44307 Nantes, France; Faculty of Physics, University of Warsaw, ul. Pasteura 5, 02-093 Warszawa, Poland
7 HUN-REN, Institute for Nuclear Research (ATOMKI), P.O. Box 51, 4001 Debrecen, Hungary
8 School of Physics and Astronomy, The University of Edinburgh, James Clerk Maxwell Building, Peter Guthrie Tait Road, Edinburgh EH9 3FD, UK
9 School of Physics and Astronomy, The University of Edinburgh, James Clerk Maxwell Building, Peter Guthrie Tait Road, Edinburgh EH9 3FD, UK; Facility for Rare Isotope Beams, Michigan State University, 640 South Shaw Lane, East Lansing, MI 48824, USA
10 Instituto Nazionale di Fisica Nucleare, Laboratori Nazionali di Legnaro, Viale dell'Università, 2-35020 Legnaro, Italy
11 Department of Physics, University of Surrey, Guildford, Surrey GU2 7XH, UK
12 Department of Physics, Istanbul University, PK:34134 Vezneciler, Istanbul, Turkey
13 Department of Physics, University of Osaka, 1-1 Machikaneyama, Toyonaka, Osaka 560-0043, Japan
14 Comisión Chilena de Energía Nuclear, Amunátegui 95, 8340701 Santiago, Región Metropolitana, Chile
15 Department of Physics, University of Hong Kong, Chong Yuet Ming Physics Building, University of Hong Kong, Pokfulam Road, Hong Kong; CAS Key Laboratory of High Precision Nuclear Spectroscopy, Instutute of Modern Physics, Chinese Academy of Sciences, 509 Nanchang Rd., Lanzhou 730000, China
16 Department of Physics, University of Hong Kong, Chong Yuet Ming Physics Building, University of Hong Kong, Pokfulam Road, Hong Kong
17 Physics Division, Oak Ridge National Laboratory, 1 Bethel Valley Road, Oak Ridge, TN 37830, USA
18 Heavy Ion Laboratory, University of Warsaw, ul. Pasteura 5A 02-093 Warszawa, Poland
19 Daresbury Laboratory, Science and Technology Facilities Council, Keckwick Lane, Daresbury, WA4 4AD, UK
20 TRIUMF, 4004 Wesbrook Mall, Vancouver, British Columbia V6T 2A3, Canada
21 Department of Physics and Astronomy, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul 08826, Republic of Korea
22 GSI Helmholtzzentrum für Schwerionenforschung GmbH, Planckstraße 1 64291 Darmstadt, Germany