Production of neutron-rich nuclei in the vicinity of 78Ni: Fragmentation reactions of unstable 81Ga and 82Ge beams

• Published in: Physics letters. B Vol. 858; p. 139081
• Main Authors: Sun, X.H., Wang, H., Yoneda, K., Aoi, N., Baba, H., Bednarczyk, P., Dombrádi, Zs, Doornenbal, P., Fülöp, Zs, Go, S., Hashimoto, T., Ideguchi, E., Kobayashi, K., Kondo, Y., Lee, J., Liu, H.N., Liu, W.P., Lou, J.L., Matsushita, M., Minakata, R., Motobayashi, T., Nishimura, D., Otsu, H., Sakurai, H., Shiga, Y., Shen, Y.P., Sohler, D., Steppenbeck, D., Sun, Y.L., Takeuchi, S., Tamii, A., Tanaka, R., Tian, Z.Y., Vajta, Zs, Yamamoto, T., Yang, X.F., Yang, Z.H., Ye, Y.L., Yokoyama, R., Zenihiro, J.
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 01.11.2024; Elsevier
• Subjects: Production of neutron-rich nuclei; Projectile fragmentation of unstable nuclei; Two-step scheme; Two-step scheme; Projectile fragmentation of unstable nuclei; Production of neutron-rich nuclei
• ISSN: 0370-2693
• DOI: 10.1016/j.physletb.2024.139081

The fragmentation reactions of neutron-rich unstable nuclei 81Ga and 82Ge at 250 MeV/nucleon have been studied in order to search the optimal mean for the production of very neutron-rich nuclei in the vicinity of 78Ni. The newly measured cross sections were compared with various calculations, showing a good agreement with EPAX3.01. The present work provides experimental insights into the two-step scheme—fragmentation following fission—as a method to produce very neutron-rich nuclei through a combination of ISOL and fragmentation of post-accelerated beams of unstable nuclei. Our results enable an evaluation of the potential of the two-step scheme in the production of very neutron-rich nuclei for the 78Ni region. The two-step scheme using fragmentation of a post-accelerated 81Ga beam could be an option to produce neutron-rich nuclei around 78Ni when the 81Ga beam intensity reaches 1.0×108 pps, compared to the one-step scheme with fission of 238U.