Hyperfine Interactions

, Volume 223, Issue 1–3, pp 137–146 | Cite as

Decay spectroscopy of neutron-rich nuclei with A ≃ 100

Article

Abstract

We review structure data obtained by decay spectroscopy of neutron-rich nuclei of mass close to 100. Emphasis is put on the contribution of experiments at IGISOL in the nineties. They confirmed the earlier postulated shape coexistence in the fast shape-transition region between N = 58 (spherical ground states and low collectivity) and N = 60 (strong axial deformation). A detailed spectroscopic study of the A = 99 chain established the upper-Z limit of the N = 56 shell closure region with 99Nb, owing to striking similarities with 97Y. A consequence of the N = 56 closure is that the s1/2 odd-neutron becomes the ground state of the most neutron-rich N = 57 isotones, starting with 99Mo, instead of the degenerated d5/2 and g7/2 subshells familiar in the tin region. Consequences on the change of spin on astrophysical r-process calculations are briefly discussed. Finally, we say a few words about neutron-rich rhodium and palladium isotopes near the neutron midshell where regular and intruder states coexist very close to each other.

Keywords

Gamma transitions and level energies 90 ≤ A ≤ 149 PACS Nuclear structure models and methods 

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. 1.
    Hotchkis, M.A.C., et al.: Nucl. Phys. A 530, 111 (1991)ADSCrossRefGoogle Scholar
  2. 2.
    Brant, S., Lhersonneau, G., Sistemich, K.: Phys. Rev. C 69, 034327 (2005)ADSCrossRefGoogle Scholar
  3. 3.
    Meyer, R.A., et al.: Nucl. Phys. A 439, 510 (1985)ADSCrossRefGoogle Scholar
  4. 4.
    Mach, H., et al.: Phys. Rev. C 41, 1141 (1990)ADSCrossRefGoogle Scholar
  5. 5.
    Lhersonneau, G., et al.: Z. Phys. A 323, 59 (1986)ADSGoogle Scholar
  6. 6.
    Lhersonneau, G., et al.: Z. Phys. A 337, 149 (1990)ADSGoogle Scholar
  7. 7.
    Hamilton, J.H., et al.: Progr. Part. Nucl. Phys. 35, 635 (1995)ADSCrossRefGoogle Scholar
  8. 8.
    Lhersonneau, G., et al.: Phys. Rev. C 63, 054302 (2001)ADSCrossRefGoogle Scholar
  9. 9.
    Lhersonneau, G., et al.: Z. Phys. A 352, 293 (1995)ADSCrossRefGoogle Scholar
  10. 10.
    Lhersonneau, G., et al.: Z. Phys. A 351, 357 (1995)ADSCrossRefGoogle Scholar
  11. 11.
    Lhersonneau, G., et al.: Phys. Rev. C 65, 024318 (2002)ADSCrossRefGoogle Scholar
  12. 12.
    Pfeiffer, B., et al.: Z. Phys. A 353, 1 (1995)ADSCrossRefGoogle Scholar
  13. 13.
    Buchinger, F., et al.: Phys. Rev. C 41, 2883 (1990)ADSCrossRefGoogle Scholar
  14. 14.
    Buchinger, F., et al.: Phys. Rev. C 42, 2754 (1990) (erratum)ADSCrossRefGoogle Scholar
  15. 15.
    Lhersonneau, G., et al.: Phys. Rev. C 49, 1379 (1994)ADSCrossRefGoogle Scholar
  16. 16.
    Lhersonneau, G., et al.: Phys. Rev. C 56, 2445 (1997)ADSCrossRefGoogle Scholar
  17. 17.
    Urban, W., et al.: Eur. Phys. J. A 16, 11 (2003)ADSCrossRefGoogle Scholar
  18. 18.
    Hwang, J. K., et al.: Phys. Rev. C 67, 054304 (2003)ADSCrossRefGoogle Scholar
  19. 19.
    Lhersonneau, G., et al.: Phys. Rev. C 57, 2974 (1998)ADSCrossRefGoogle Scholar
  20. 20.
    Lhersonneau, G., et al.: Phys. Rev. C 57, 681 (1998)ADSCrossRefGoogle Scholar
  21. 21.
    Campbell, P.: Hyperfine Interact. 171, 143 (2006)ADSCrossRefGoogle Scholar
  22. 22.
    Lhersonneau, G., et al.: Phys. Rev. C 54, 1117 (1996)ADSCrossRefGoogle Scholar
  23. 23.
    Matejska-Minda, M., et al.: Phys. Rev. C 80, 017302 (2009)ADSCrossRefGoogle Scholar
  24. 24.
    Lhersonneau, G., Brant, S., Paar, V.: Phys. Rev. C 62, 044304 (2000)ADSCrossRefGoogle Scholar
  25. 25.
    Lhersonneau, G., et al.: Phys. Rev. C 63, 034316 (2001)ADSCrossRefGoogle Scholar
  26. 26.
    Marginean, N., et al.: Phys. Rev. C 80, 021301 (2009)ADSCrossRefGoogle Scholar
  27. 27.
    Mehren, T., et al.: Phys. Rev. Lett. 77, 458 (1996)ADSCrossRefGoogle Scholar
  28. 28.
    Wang, J.C., et al.: Phys. Lett. 454B, 1 (1999)ADSCrossRefGoogle Scholar
  29. 29.
    Lhersonneau, G., et al.: Phys. Rev. C 54, 1592 (1996)ADSCrossRefGoogle Scholar
  30. 30.
    Liang, M., et al.: Z. Phys. A 351, 13 (1995)ADSCrossRefGoogle Scholar
  31. 31.
    Urban, W., et al.: Phys. Rev. C 79, 067301 (2009)ADSCrossRefGoogle Scholar
  32. 32.
    Lhersonneau, G., et al.: Eur. Phys. J. A 1, 285 (1998)ADSCrossRefGoogle Scholar
  33. 33.
    Lhersonneau, G., et al.: Phys. Rev. C 60, 014315 (1999)ADSCrossRefGoogle Scholar
  34. 34.
    Kurpeta, J., et al.: Eur. Phys. J. A 33, 307 (2007)ADSCrossRefGoogle Scholar
  35. 35.
    Lhersonneau, G., et al.: Phys. Rev. C 67, 024303 (2003)ADSCrossRefGoogle Scholar

Copyright information

© Springer Science+Business Media B.V. 2012

Authors and Affiliations

  1. 1.GANILCaenFrance
  2. 2.Mainz UniversityMainzGermany

Personalised recommendations