Mirror Nuclei - Isospin Symmetry Breaking in the Mass A=35 and A=51 Mirror Nuclei

Research output: ThesisDoctoral Thesis (compilation)


High-spin states in the A=35 mirror nuclei 35Ar and 35Cl and A=51 mirror nuclei 51Fe and 51Mn were populated using fusion-evaporation reactions. The gamma rays were detected in the powerful Ge arrays Gammasphere and GASP, respectively, which operated in conjunction with ancillary detectors for evaporated particles.

The resulting mirror energy difference diagrams of the two mirror pairs are interpreted in terms of various electromagnetic effects and possible isospin-symmetry breaking components of the nuclear force. In the A=35 mirror nuclei effects of the electromagnetic spin-orbit interaction have been discriminated for the first time. In addition, an unusual decay pattern of excited states can give direct evidence on isospin mixing. Excited states in 51Fe have been observed for the first time. In the A=51 mirror nuclei detailed isospin-symmetry studies are performed including core-excited states. This mark the first comparison of such analogue states in mirror nuclei.

An extensive level scheme of the nucleus 51Mn has been constructed. It comprises approximately 50 previously unknown core excited states, which are interpreted in terms of comprehensive large shell-model calculations including electro-magnetic decay properties. In addition, a rotational band has been identified, which is interpreted using the cranked Nilsson-Strutinsky model and found to comprise a particle in the 1g9/2 intruder orbital.


  • Jörgen Ekman
Research areas and keywords

Subject classification (UKÄ) – MANDATORY

  • Subatomic Physics


  • high-spin states, shell-model calculations, fusion-evaporation reactions, Nuclear physics, Kärnfysik, Fysicumarkivet A:2004:Ekman, isospin symmetry, Mirror nuclei
Original languageEnglish
Awarding Institution
Supervisors/Assistant supervisor
  • [unknown], [unknown], Supervisor, External person
Award date2004 Jun 4
  • Jörgen Ekman, Department of Physics, Box 118, SE-22100 Lund, Sweden,
Print ISBNs91-628-6061-5
Publication statusPublished - 2004
Publication categoryResearch

Bibliographic note

Defence details Date: 2004-06-04 Time: 13:15 Place: Lecture Hall B, Department of Physics External reviewer(s) Name: Sharpey-Schafer, J.F. Title: Prof Affiliation: South Africa --- Article: 1. The A=51 Mirror Nuclei 51Fe and 51MnEur. Phys. J. A 9, 13 (2000).J. Ekman et al. Article: 2. Evidence for a 1g9/2 rotational band in 51MnPhys. Rev. C 66, 051301(R) (2002).J. Ekman et al. Article: 3. Unusual isospin-breaking and isospin-mixing effects in the A=35 mirror nucleiPhys. Rev. Lett. 92, 132502 (2004).J. Ekman et al. Article: 4. Gamma-ray spectroscopy of core-excited states in 51MnSubmitted to Phys. Rev. C.J. Ekman et al. Article: 5. Core excited states in the A=51 mirror nucleiTo be submitted to Eur. Phys. J.J. Ekman et al.

Related research output

Ekman, J., Claes Fahlander & Dirk Rudolph, 2005, In : Modern Physics Letters A. 20, 39, p. 2977-2992

Research output: Contribution to journalReview article

Ekman, J., Andersson, L-L., Claes Fahlander, Johansson, E., du Rietz, R. & Dirk Rudolph, 2005, In : European Physical Journal A. Hadrons and Nuclei. 25, Suppl 1, p. 363-366

Research output: Contribution to journalArticle

Ekman, J., Andreoiu, C., Claes Fahlander, Mineva, M., Dirk Rudolph, Bentley, MA., Williams, SJ., Charity, RJ., Ideguchi, E., Reviol, W., Sarantites, DG., Tomov, V., Clark, RM., Cromaz, M., Fallon, P., Macchiavelli, AO., Carpenter, MR. & Seweryniak, D., 2004, In : Physical Review C (Nuclear Physics). 70, 5, 057305.

Research output: Contribution to journalArticle

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