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Production cross sections of neutron-rich nuclides near the N=126 neutron-shell closure from 1000 MeV/u Pb208 on Be9

Suraj Kumar Singh1,2,3,*, Emma Haettner1,†, Christine Hornung1, Gee Bartram4, Timo Dickel1,2, Justus M. Eder1, Nicolas Hubbard1,5, Zsolt Podolyák4, Rinku Prajapat1,6 et al. (HISPEC/DESPEC Collaboration, Super-FRS Experiment Collaboration)

Rinku Prajapat1,6, José Luis Rodríguez-Sánchez7,8, Christoph Scheidenberger1,2,3, Yoshiki K. Tanaka9, Jianwei Zhao1, Jaime Acosta10, Guler Aggez1, Muneerah Al-Aqeel11, Betool Alayed12,13, Helena M. Albers1, Ahmed Alharbi12,13, Sultan Alhomaidhi1,5,14,15, Faraz Amjad1, Tugba Arici1, Michael Armstrong1, Martin Bajzek1, Akashrup Banerjee1, Giovanna Benzoni16, Nara Singh Bondili17, Alison Bruce18, Carlo Bruno19, Jamie Chadderton13, Zhiqiang Chen1, Fabio C. L. Crespi16,20, Biswajit Das21, Santwana Dubey1, Joachim Enders5,15, Martina Feijoo-Fontán8, Carlos Ferrera10, Eugenio R. Gamba16,20, Zhuang Ge1, Hans Geissel1,2,‡, Jürgen Gerl1, Pavel Golubev22,§, Antia Graña-González8, Magda Górska1, Andrea Gottardo23, Tuomas Grahn24,25, Oscar Hall19, Muhsin N. Harakeh26, Laura Harkness-Brennan13, Yuliia Hrabar22,∥, Shaheen Jazrawi4, Philipp R. John5, Calum E. Jones4, Dan Judson13, Andrea Jungclaus10, Nasser Kalantar-Nayestanaki26, Erika Kazantseva1, Ronja Knöbel1, Pavlos Koseoglou5, Aleksandrina Kosir1,27, Gregor Kosir28, Daria Kostyleva1, Marc Labiche29, Eva Lovsin28,30, Radomira Lozeva31, Adam McCarter13,¶, Daniele Mengoni32,33, Michal Mikolajczuk34, Benedicte Million16, Andrew K. Mistry1, Ana I. Morales35, David J. Morrissey36,1, Ivan Mukha1, Gopal Mukherjee37, Sonja E. A. Orrigo35, Robert Page13, Rudrajyoti Palit21, Philippos Papadakis29, Tom G. Parry4, Sorin Pascu4, Norbert Pietralla5,15, Stephane Pietri1, Wolfgang R. Plaß1,2, Marta Polettini16,20, Patrick H. Regan4,38, Ellis Rintoul13, Elena Rocco1, David Rodriguez-Garcia35, Heidi Rösch-Kabadayi1,5,15, Pratap Roy37,1, Matthias Rudigier5, Dirk Rudolph22, Elif Sahin24, Luis Sarmiento Pico22, Maria-Magdalini Satrazani13,**, Min Si31, Ionut C. Stefanescu39,††, Jose Luis Tain35, Matjaz Vencelj28, Jelena Vesić28, Helmut Weick1, Volker Werner5, Oliver Wieland16, Kathrin Wimmer1, Jin Wu40, Yener Yasun41, and Guangxin Zhang32 (HISPEC/DESPEC Collaboration, Super-FRS Experiment Collaboration)

  • *Contact author: s.k.singh@gsi.de
  • †Contact author: e.haettner@gsi.de
  • ‡Deceased.
  • §Present address: Detector Group, European Spallation Source ERIC, 221 00 Lund, Sweden.
  • ∥Present address: Nuclear Science Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA.
  • Present address: Van Swinderen Institute for Particle Physics and Gravity, University of Groningen, Groningen, 9747AA, The Netherlands.
  • **Present address: TRIUMF, 4004 Wesbrook Mall, Vancouver, V6T 2A3 BC, Canada.
  • ††Present address: Institut für Kernphysik, Technische Universität Darmstadt, 64289 Darmstadt, Germany.
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Phys. Rev. C 114, 044622 – Published 16 October, 2026

DOI: https://doi.org/10.1103/p27s-fp1j

Abstract

The production cross sections of neutron-rich nuclides near the N=126 neutron shell closure have been measured for the elements ranging from tungsten (Z=74) to gold (Z=79) in the fragmentation of a 1000MeV/u Pb208 beam on a Be9 target. Several cross sections, namely those for W196−199, Re199−201, and Os202−203, were determined for the first time with this projectile-target combination. The results are compared with the predictions of several nuclear reaction models and semiempirical parametrizations; special attention is devoted to multiple proton-removal channels and the formation of nuclides with neutron number N=127.

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Phys. Rev. C 114, 044622– Published 16 October, 2026
  • Received 16 April 2026
  • Accepted 8 September 2026
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