Proton single particle energies next to 78Ni: Spectroscopy of 77Cu via single proton knock-out reaction

Zs Vajta, D. Sohler, Y. Shiga, K. Yoneda, K. Sieja, D. Steppenbeck, Zs Dombrádi, N. Aoi, P. Doornenbal, J. Lee, H. Liu, M. Matsushita, S. Takeuchi, H. Wang, H. Baba, P. Bednarczyk, Zs Fülöp, S. Go, T. Hashimoto, E. IdeguchiK. Ieki, K. Kobayashi, Y. Kondo, R. Minakata, T. Motobayashi, D. Nishimura, H. Otsu, H. Sakurai, Y. Sun, A. Tamaii, R. Tanaka, Z. Tian, T. Yamamoto, X. Yang, Z. Yang, Y. Ye, R. Yokoyama, J. Zenihiro

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)


Excited states of 77Cu have been investigated by use of single proton knock-out reaction at the Radioactive Isotope Beam Factory in RIKEN in order to reveal the main components of the proton single-particle states. Three excited states were observed at 271, 902 and 2068 keV in 77Cu. The lowest-energy excited state follows the trend predicted for the crossing of the 3/21 and 5/21 states. Comparing the excitation energies of the 3/2, 5/2 and 7/2 levels from 69Cu to 77Cu one can see that the Z=28 shell gap between the p3/2 and f7/2 states is rather stable, while the f5/2−f7/2 spin–orbit splitting decreases by ∼1.5 MeV in agreement with shell model calculations using the tensor force.

Original languageEnglish
Pages (from-to)99-103
Number of pages5
JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Publication statusPublished - Jul 10 2018
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics

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