Observation of new neutron-rich isotopes in the vicinity of Zr 110

T. Sumikama, N. Fukuda, N. Inabe, D. Kameda, T. Kubo, Y. Shimizu, H. Suzuki, H. Takeda, K. Yoshida, H. Baba, F. Browne, A. M. Bruce, R. Carroll, N. Chiga, R. Daido, F. Didierjean, P. Doornenbal, Y. Fang, G. Gey, E. IdeguchiT. Isobe, S. Lalkovski, Z. Li, G. Lorusso, R. Lozeva, H. Nishibata, S. Nishimura, I. Nishizuka, A. Odahara, Z. Patel, Zs Podolyák, P. H. Regan, S. Rice, O. J. Roberts, H. Sakurai, G. S. Simpson, L. Sinclair, P. A. Söderström, M. Tanaka, J. Taprogge, H. Watanabe, V. Werner, O. Wieland, J. Wu, Z. Y. Xu, A. Yagi

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Abstract

Neutron-rich radioactive isotope (RI) beams in the vicinity of Zr110 were produced using the in-flight fission of a 345-MeV/nucleon U238 beam at the RIKEN Radioactive Isotope Beam Factory. The RI beams were separated in flight by the large-acceptance two-stage fragment separator BigRIPS. Isotopes were clearly identified in a low-background particle-identification plot, which was obtained from the measurements of time of flight, magnetic rigidity, and energy loss using beam-line detectors placed in the BigRIPS separator and the ZeroDegree spectrometer. Nine new isotopes, Br101, Kr102, Rb105,106, Sr108, Y110,111, Zr114, and Nb117, are reported for the first time, with their measured production cross sections compared with the extrapolations of lighter isotopes down to the femtobarn regime.

Original languageEnglish
Article number014614
JournalPhysical Review C
Volume103
Issue number1
DOIs
Publication statusPublished - Jan 2021
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics

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