Production of new neutron-rich isotopes near the <math xmlns="http://www.w3.org/1998/Math/MathML"><mrow><mi>N</mi><mo>=</mo><mn>60</mn></mrow></math> isotones <math xmlns="http://www.w3.org/1998/Math/MathML"><mmultiscripts><mi>Ge</mi><mprescripts></mprescripts><none></none><mn>92</mn></mmultiscripts></math> and <math xmlns="http://www.w3.org/1998/Math/MathML"><mmultiscripts><mi>As</mi><mprescripts></mprescripts><none></none><mn>93</mn></mmultiscripts></math> by in-flight fission of a 345 MeV/nucleon <math xmlns="http://www.w3.org/1998/Math/MathML"><mmultiscripts><mi mathvariant="normal">U</mi><mprescripts></mprescripts><none></none><mn>238</mn></mmultiscripts></math> beam

Y. Shimizu; T. Kubo; T. Sumikama; N. Fukuda; H. Takeda; H. Suzuki; D. S. Ahn; N. Inabe; K. Kusaka; M. Ohtake; Y. Yanagisawa; K. Yoshida; Y. Ichikawa; T. Isobe; H. Otsu; H. Sato; T. Sonoda; D. Murai; N. Iwasa; N. Imai; Y. Hirayama; S. C. Jeong; S. Kimura; H. Miyatake; M. Mukai; D. G. Kim; E. Kim; A. Yagi

doi:10.1103/PhysRevC.109.044313

Production of new neutron-rich isotopes near the $N = 60$ isotones ${}^{92}{Ge}$ and ${}^{93}{As}$ by in-flight fission of a 345 MeV/nucleon ${}^{238}U$ beam

Y. Shimizu¹, T. Kubo ^1,*, T. Sumikama¹, N. Fukuda¹, H. Takeda¹, H. Suzuki¹, D. S. Ahn¹, N. Inabe¹, K. Kusaka¹ et al.

M. Ohtake¹, Y. Yanagisawa¹, K. Yoshida¹, Y. Ichikawa¹, T. Isobe¹, H. Otsu¹, H. Sato¹, T. Sonoda¹, D. Murai², N. Iwasa³, N. Imai⁴, Y. Hirayama⁵, S. C. Jeong⁵, S. Kimura⁵, H. Miyatake⁵, M. Mukai⁵, D. G. Kim⁶, E. Kim⁶, and A. Yagi⁷

¹RIKEN Nishina Center, RIKEN, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
²Department of Physics, Rikkyo University, Toshima, Tokyo 171-8501, Japan
³Department of Physics, Tohoku University, Aoba, Sendai, Miyagi 980-8578, Japan
⁴Center for Nuclear Study (CNS), The University of Tokyo, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
⁵Wako Nuclear Science Center (WNSC), Institute of Particle and Nuclear Studies (IPNS), High Energy Accelerator Research Organization (KEK), Wako, Saitama 351-0198, Japan
⁶Rare Isotope Science Project, Institute for Basic Science (IBS), Daejeon 305-811, Republic of Korea
⁷Department of Physics, Osaka University, Toyonaka, Osaka 560-0043, Japan

^*Corresponding author: kubo@ribf.riken.jp

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Phys. Rev. C 109, 044313 – Published 8 April, 2024

DOI: https://doi.org/10.1103/PhysRevC.109.044313

Abstract

A search for new neutron-rich isotopes near the $N = 60$ isotones ${}^{92}{Ge}$ and ${}^{93}{As}$ has been performed using a 345 MeV/nucleon ${}^{238}U$ beam at the RIKEN Nishina Center RI Beam Factory. Fission fragments produced were analyzed and identified in flight using the large-acceptance two-stage separator BigRIPS. We have observed a total of 15 new neutron-rich isotopes: ${}^{84}{Cu}, {}^{86, 87}{Zn}, {}^{88, 89}{Ga}, {}^{91, 92}{Ge}, {}^{93, 94, 95}{As}, {}^{96, 97}{Se}, {}^{99, 100}{Br}$ , and ${}^{103}{Kr}$ .

Physical Review C

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Production of new neutron-rich isotopes near the $N = 60$ isotones ${}^{92}{Ge}$ and ${}^{93}{As}$ by in-flight fission of a 345 MeV/nucleon ${}^{238}U$ beam

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Production of new neutron-rich isotopes near the N=60 isotones Ge92 and As93 by in-flight fission of a 345 MeV/nucleon U238 beam

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Production of new neutron-rich isotopes near the $N = 60$ isotones ${}^{92}{Ge}$ and ${}^{93}{As}$ by in-flight fission of a 345 MeV/nucleon ${}^{238}U$ beam