Physics Letters B (Nov 2021)
Rapidity distributions of Z = 1 isotopes and the nuclear symmetry energy from Sn+Sn collisions with radioactive beams at 270 MeV/nucleon
- M. Kaneko,
- T. Murakami,
- T. Isobe,
- M. Kurata-Nishimura,
- A. Ono,
- N. Ikeno,
- J. Barney,
- G. Cerizza,
- J. Estee,
- G. Jhang,
- J.W. Lee,
- W.G. Lynch,
- C. Santamaria,
- C.Y. Tsang,
- M.B. Tsang,
- R. Wang,
- D.S. Ahn,
- L. Atar,
- T. Aumann,
- H. Baba,
- K. Boretzky,
- J. Brzychczyk,
- N. Chiga,
- N. Fukuda,
- I. Gašparić,
- B. Hong,
- A. Horvat,
- T. Ichihara,
- K. Ieki,
- N. Inabe,
- Y.J. Kim,
- T. Kobayashi,
- Y. Kondo,
- P. Lasko,
- H.S. Lee,
- Y. Leifels,
- J. Łukasik,
- J. Manfredi,
- A.B. McIntosh,
- P. Morfouace,
- T. Nakamura,
- N. Nakatsuka,
- S. Nishimura,
- R. Olsen,
- H. Otsu,
- P. Pawłowski,
- K. Pelczar,
- D. Rossi,
- H. Sakurai,
- H. Sato,
- H. Scheit,
- R. Shane,
- Y. Shimizu,
- H. Simon,
- T. Sumikama,
- D. Suzuki,
- H. Suzuki,
- H. Takeda,
- S. Tangwancharoen,
- Y. Togano,
- H. Törnqvist,
- Z. Xiao,
- S.J. Yennello,
- J. Yurkon,
- Y. Zhang
Affiliations
- M. Kaneko
- Department of Physics, Kyoto University, Kyoto 606-8502, Japan; RIKEN Nishina Center, Saitama 351-0198, Japan; Corresponding author.
- T. Murakami
- Department of Physics, Kyoto University, Kyoto 606-8502, Japan
- T. Isobe
- RIKEN Nishina Center, Saitama 351-0198, Japan
- M. Kurata-Nishimura
- RIKEN Nishina Center, Saitama 351-0198, Japan
- A. Ono
- Department of Physics, Tohoku University, Sendai 980-8578, Japan
- N. Ikeno
- Department of Life and Environmental Agricultural Sciences, Tottori University, Tottori 680-8551, Japan
- J. Barney
- National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, MI 48824, USA; Department of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA
- G. Cerizza
- National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, MI 48824, USA
- J. Estee
- National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, MI 48824, USA; Department of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA
- G. Jhang
- National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, MI 48824, USA
- J.W. Lee
- Department of Physics, Korea University, Seoul 02841, Republic of Korea
- W.G. Lynch
- National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, MI 48824, USA; Department of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA
- C. Santamaria
- National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, MI 48824, USA
- C.Y. Tsang
- National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, MI 48824, USA; Department of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA
- M.B. Tsang
- National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, MI 48824, USA; Department of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA
- R. Wang
- National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, MI 48824, USA
- D.S. Ahn
- RIKEN Nishina Center, Saitama 351-0198, Japan; Korea Basic Science Institute, Daejeon 34133, Republic of Korea
- L. Atar
- Institut für Kernphysik, Technische Universität Darmstadt, D-64289 Darmstadt, Germany; GSI Helmholtzzentrum für Schwerionenforschung GmbH, D-64291 Darmstadt, Germany
- T. Aumann
- Institut für Kernphysik, Technische Universität Darmstadt, D-64289 Darmstadt, Germany; GSI Helmholtzzentrum für Schwerionenforschung GmbH, D-64291 Darmstadt, Germany
- H. Baba
- RIKEN Nishina Center, Saitama 351-0198, Japan
- K. Boretzky
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, D-64291 Darmstadt, Germany
- J. Brzychczyk
- Faculty of Physics, Astronomy and Applied Computer Science, Jagiellonian University, Pl-30-348 Kraków, Poland
- N. Chiga
- RIKEN Nishina Center, Saitama 351-0198, Japan
- N. Fukuda
- RIKEN Nishina Center, Saitama 351-0198, Japan
- I. Gašparić
- Division of Experimental Physics, Ruđer Bošković Institute, HR-10002 Zagreb, Croatia
- B. Hong
- Department of Physics, Korea University, Seoul 02841, Republic of Korea
- A. Horvat
- Institut für Kernphysik, Technische Universität Darmstadt, D-64289 Darmstadt, Germany; GSI Helmholtzzentrum für Schwerionenforschung GmbH, D-64291 Darmstadt, Germany
- T. Ichihara
- RIKEN Nishina Center, Saitama 351-0198, Japan
- K. Ieki
- Department of Physics, Rikkyo University, Tokyo 171-8501, Japan
- N. Inabe
- RIKEN Nishina Center, Saitama 351-0198, Japan
- Y.J. Kim
- Rare Isotope Science Project, Institute for Basic Science, Daejeon 34047, Republic of Korea
- T. Kobayashi
- Department of Physics, Tohoku University, Sendai 980-8578, Japan
- Y. Kondo
- Department of Physics, Tokyo Institute of Technology, Tokyo 152-8551 Japan
- P. Lasko
- Institute of Nuclear Physics, Polish Academy of Sciences, Pl-31-342 Kraków, Poland
- H.S. Lee
- Rare Isotope Science Project, Institute for Basic Science, Daejeon 34047, Republic of Korea
- Y. Leifels
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, D-64291 Darmstadt, Germany
- J. Łukasik
- Institute of Nuclear Physics, Polish Academy of Sciences, Pl-31-342 Kraków, Poland
- J. Manfredi
- National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, MI 48824, USA; Department of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA
- A.B. McIntosh
- Cyclotron Institute, Texas A&M University, College Station, TX 77843, USA
- P. Morfouace
- National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, MI 48824, USA
- T. Nakamura
- Department of Physics, Tokyo Institute of Technology, Tokyo 152-8551 Japan
- N. Nakatsuka
- Department of Physics, Kyoto University, Kyoto 606-8502, Japan; RIKEN Nishina Center, Saitama 351-0198, Japan
- S. Nishimura
- RIKEN Nishina Center, Saitama 351-0198, Japan
- R. Olsen
- Cyclotron Institute, Texas A&M University, College Station, TX 77843, USA
- H. Otsu
- RIKEN Nishina Center, Saitama 351-0198, Japan
- P. Pawłowski
- Institute of Nuclear Physics, Polish Academy of Sciences, Pl-31-342 Kraków, Poland
- K. Pelczar
- INFN-Laboratori Nazionali del Gran Sasso, 67100 L'Aquila, Italy
- D. Rossi
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, D-64291 Darmstadt, Germany
- H. Sakurai
- RIKEN Nishina Center, Saitama 351-0198, Japan
- H. Sato
- RIKEN Nishina Center, Saitama 351-0198, Japan
- H. Scheit
- Institut für Kernphysik, Technische Universität Darmstadt, D-64289 Darmstadt, Germany
- R. Shane
- National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, MI 48824, USA
- Y. Shimizu
- RIKEN Nishina Center, Saitama 351-0198, Japan
- H. Simon
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, D-64291 Darmstadt, Germany
- T. Sumikama
- RIKEN Nishina Center, Saitama 351-0198, Japan
- D. Suzuki
- RIKEN Nishina Center, Saitama 351-0198, Japan
- H. Suzuki
- RIKEN Nishina Center, Saitama 351-0198, Japan
- H. Takeda
- RIKEN Nishina Center, Saitama 351-0198, Japan
- S. Tangwancharoen
- National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, MI 48824, USA
- Y. Togano
- Department of Physics, Rikkyo University, Tokyo 171-8501, Japan; Department of Physics, Tokyo Institute of Technology, Tokyo 152-8551 Japan
- H. Törnqvist
- Institut für Kernphysik, Technische Universität Darmstadt, D-64289 Darmstadt, Germany; GSI Helmholtzzentrum für Schwerionenforschung GmbH, D-64291 Darmstadt, Germany
- Z. Xiao
- Department of Physics, Tsinghua University, Beijing 100084, PR China
- S.J. Yennello
- Cyclotron Institute, Texas A&M University, College Station, TX 77843, USA; Department of Chemistry, Texas A&M University, College Station, TX 77843, USA
- J. Yurkon
- National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, MI 48824, USA
- Y. Zhang
- Department of Physics, Tsinghua University, Beijing 100084, PR China
- Journal volume & issue
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Vol. 822
p. 136681
Abstract
The rapidity distributions of hydrogen isotopes emitted from central collisions of neutron-rich 132Sn+124Sn and neutron-deficient 108Sn+112Sn systems at 270 MeV/nucleon were investigated at RIKEN-RIBF. The data are compared with antisymmetrized molecular dynamics (AMD) calculations and the rapidity distributions can be reproduced after adjusting the in-medium nucleon-nucleon cross sections. The double ratios between the two reaction systems taken for the relative yields of deuteron to proton (d/p) and triton to proton (t/p) are further examined in the midrapidity domain, where the adjustments in the AMD calculations do not affect much on them. The d/p and t/p double ratios at midrapidity agree well with the ratio of the system neutron numbers and its squared value, respectively, and the rapidity dependence of these double ratios is consistent with a picture of partial mixing of colliding nuclei. By comparing with the AMD model which shows a strong symmetry energy dependence of the t/p double ratio, the experimental result in the midrapidity domain favors the calculation with a symmetry-energy slope parameter around L=46 MeV rather than L=108 MeV.
