Search for particle-hole excitations across the N=28 shell gap in 45,46Ar nuclei

Zs Dombrádi, D. Sohler, O. Sorlin, F. Azaiez, F. Nowacki, M. Stanoiu, Yu E. Penionzhkevich, J. Timár, F. Amorini, D. Baiborodin, A. Bauchet, F. Becker, M. Belleguic, C. Borcea, C. Bourgeois, Z. Dlouhy, C. Donzaud, J. Duprat, Z. Elekes, D. Guillemaud-MuellerF. Ibrahim, M. Lewitowicz, M. J. Lopez, R. Lucas, S. M. Lukyanov, V. Maslov, C. Moore, J. Mrazek, M. G. Saint-Laurent, F. Sarazin, J. A. Scarpaci, G. Sletten, C. Stodel, M. Taylor, C. Theisen, G. Voltolini

Research output: Contribution to journalArticle

37 Citations (Scopus)


The structure of the N≃28 45,4618 Ar27,28 nuclei has been investigated through in-beam γ-ray spectroscopy using the fragmentation reaction of a 60 A MeV 48Ca beam on a thin Be target. γ-ray energies, intensities, γγ coincidences and γ-ray angular anisotropies have been measured. The level scheme of 45Ar is proposed for the first time, while that of 46Ar has been extended to states above the previously known 2+ first excited state. An isomeric state at 537 keV of 0.34+0.32 -0.15 ns lifetime has been found in 45Ar from the line-shape analysis of the γ ray connecting the first excited state to the ground state. The experimental results are interpreted using shell-model calculations.

Original languageEnglish
Pages (from-to)195-206
Number of pages12
JournalNuclear Physics A
Issue number3-4
Publication statusPublished - Nov 17 2003


  • Large-scale shell model calculations
  • Nuclear reactionsBe(Ca, X) Ar/ Ar, E = 60 MeV/nucleon; measured Eγ, Iγ, γγ, (particle)γ-coin, deduced levels, J, π, T
  • Spectrometer, Ge and BaF detectors

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

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  • Cite this

    Dombrádi, Z., Sohler, D., Sorlin, O., Azaiez, F., Nowacki, F., Stanoiu, M., Penionzhkevich, Y. E., Timár, J., Amorini, F., Baiborodin, D., Bauchet, A., Becker, F., Belleguic, M., Borcea, C., Bourgeois, C., Dlouhy, Z., Donzaud, C., Duprat, J., Elekes, Z., ... Voltolini, G. (2003). Search for particle-hole excitations across the N=28 shell gap in 45,46Ar nuclei. Nuclear Physics A, 727(3-4), 195-206.