Skip to main content
SpringerLink
Log in

Microscopic study of positive-parity yrast bands of 224−234Th isotopes

  • Published:
Pramana Aims and scope Submit manuscript

Abstract

The positive-parity bands in 224 − 234Th are studied using the projected shell model (PSM) approach. The energy levels, deformation systematics, B(E2) transition probabilities and nuclear g-factors are calculated and compared with the experimental data. The calculation reproduces the observed positive-parity yrast bands and B(E2) transition probabilities. Measurement of B(E2) transition probabilities for higher spins and g-factors would be a stringent test for our predictions. The results of theoretical calculations indicate that the deformation systematics in 224 − 234Th isotopes depend on the occupation of low k components of high j orbits in the valence space and the deformation producing tendency of the neutron–proton interaction operating between spin orbit partner (SOP) orbits, the [(2g9/2) π –(2g7/2) ν ] and [(1i13/2) π –(1i11/2) ν ] SOP orbits in the present context. In addition, the deformation systematics also depend on the polarization of (1h11/2) π orbit. The low-lying states of yrast spectra are found to arise from 0-quasiparticle (qp) intrinsic states whereas the high-spin states turn out to possess composite structure.

This is a preview of subscription content, log in via an institution to check access.

Access this article

Log in via an institution

Price excludes VAT (USA)
Tax calculation will be finalised during checkout.

Instant access to the full article PDF.

Institutional subscriptions

Figure 1
Figure 2
Figure 3

Similar content being viewed by others

References

  1. I Y Lee, Nucl. Phys. A 520, 641c (1990)

    Article  ADS  Google Scholar 

  2. A A Cohen, Nucl. Data Sheets 80, 227 (1997)

    Article  ADS  Google Scholar 

  3. Y A Akovali, Nucl. Data Sheets 77, 433 (1996)

    Article  ADS  Google Scholar 

  4. N Azmal et al, J. Phys.: G Nucl. Part. Phys. 25, 831 (1999)

    Article  ADS  Google Scholar 

  5. E Browne and J K Tuli, Nucl. Data Sheets 113, 2113 (2012)

    Article  ADS  Google Scholar 

  6. E Browne, Nucl. Data Sheets 107, 2579 (2006)

    Article  ADS  Google Scholar 

  7. E Browne and J K Tuli, Nucl. Data Sheets 108, 681 (2007)

    Article  ADS  Google Scholar 

  8. S Raman, C W Nestor Jr and P Tikkanen, At. Data Nucl. Data Tables 78, 82 (2001)

    Article  Google Scholar 

  9. S Raman, C H Malarkey, W T Milner, C W Nestor Jr and P H Stelson, At. Data Nucl. Data Tables 36, 1 (1987)

    Article  ADS  Google Scholar 

  10. O Hausser et al, Phys. Rev . Lett. 48, 383 (1982)

    Article  ADS  Google Scholar 

  11. J F C Cocks et al, Nucl. Phys. A 645, 61 (1999)

    Article  ADS  Google Scholar 

  12. N V Zamfir and D Kusnezov, Phys. Rev . C 63, 054306 (2001)

    Article  ADS  Google Scholar 

  13. S M Diab, Prog. Phys. 2, 97 (2008)

    Google Scholar 

  14. M Diebel and U Mosel, Z. Phys. A 303, 131 (1981)

    Article  ADS  Google Scholar 

  15. W Nazarewicz and P Olanders, Nucl. Phys. A 441, 420 (1985)

    Article  ADS  Google Scholar 

  16. J L Egido and P Ring, Nucl. Phys. A 423, 93 (1984)

    Article  ADS  Google Scholar 

  17. K Hara and Y Sun, Int. J. Mod. Phys. E 4, 637 (1995)

    Article  ADS  Google Scholar 

  18. Y Sun and D H Feng, Phys. Rep. 264, 375 (1996)

    Article  Google Scholar 

  19. B D Sehgal, R Devi and S K Khosa, J. Phys. G 32, 1211 (2006)

    Article  ADS  Google Scholar 

  20. B A Bian, Y M Di, G L Long, Y Sun, J Zhang and J A Sheikh, Phys. Rev . C 75, 014312 (2007)

    Article  ADS  Google Scholar 

  21. Y C Yang, Y Sun, S J Zhu, M Guidry and C L Wu, J. Phys. G 37, 085110 (2010)

    Article  Google Scholar 

  22. S Verma, R Devi and S K Khosa, Eur. Phys. J. A 30, 531 (2006)

    Article  ADS  Google Scholar 

  23. S G Nilsson, C F Tsang, A Sobiczewski, Z Szymanski, S Wycech, C Gustafson, I L Lamm, P Moller and B Nilsson, Nucl. Phys. A 131, 1 (1969)

    Article  ADS  Google Scholar 

  24. Y Sun and J L Egido, Nucl. Phys. A 580, 1 (1994)

    Article  ADS  Google Scholar 

  25. L Grodzins, Phys. Lett. 2, 88 (1962)

    Article  ADS  Google Scholar 

  26. R F Casten et al, Phys. Lett. 47, 1433 (1981)

    Article  Google Scholar 

  27. P Federman and S Pittel, Phys. Lett. B 69, 385 (1977)

    Article  ADS  Google Scholar 

  28. S C K Nair, A Ansari and L Satpathy, Phys. Lett. B 71, 257 (1977)

    Article  ADS  Google Scholar 

  29. S Pittel, Nucl. Phys. A 347, 417 (1980)

    Article  ADS  Google Scholar 

  30. M Danos and V Gillet, Phys. Rev . 161, 1034 (1967)

    Article  ADS  Google Scholar 

  31. A Arima and V Gillet, Ann. Phys. (N.Y.) 66, 117 (1971)

    Article  ADS  Google Scholar 

  32. A Arima, T Otsuka, F Iachello and I Talmi, Phys. Lett. B 66, 205 (1977)

    Article  ADS  Google Scholar 

  33. P Federman, S Pittel and R Compos, Phys. Lett. B 35, 9 (1979)

    ADS  Google Scholar 

  34. P Federman and S Pittel, Phys. Lett. B 77, 29 (1978)

    Article  ADS  Google Scholar 

  35. P Federman and S Pittel, Phys. Rev . C 20, 820 (1979)

    Article  ADS  Google Scholar 

  36. P K Mattu and S K Khosa, Phys. Rev . C 39, 2018 (1989)

    Article  ADS  Google Scholar 

  37. P Rozmej, GSI-Preprint 85–41 (1985)

  38. A Bohr and B R Mottelson, Nuclear structure (W A Benjamin, New York, Amsterdam, 1969) Vol. I

  39. B Castel and I S Towner, Modern theories of nuclear moments (Clarendon Press, Oxford-Clarendon, 1990)

    Google Scholar 

  40. J Rikovska et al, Phys. Rev . Lett. 85, 1392 (2000)

    Article  ADS  Google Scholar 

Download references

Acknowledgements

The authors are grateful to Prof. Y Sun and Prof. J A Sheikh for their collaborations and most valuable discussions. One of the authors (DR) is grateful to UGC, New Delhi, India, for providing financial assistance under RGNJRF.

Author information

Authors and Affiliations

  1. Department of Physics and Electronics, University of Jammu, Jammu, 180 006, India

    DAYA RAM, RANI DEVI & S K KHOSA

Authors
  1. DAYA RAM
    View author publications

    You can also search for this author in PubMed Google Scholar

  2. RANI DEVI
    View author publications

    You can also search for this author in PubMed Google Scholar

  3. S K KHOSA
    View author publications

    You can also search for this author in PubMed Google Scholar

Rights and permissions

Reprints and permissions

About this article

Cite this article

RAM, D., DEVI, R. & KHOSA, S.K. Microscopic study of positive-parity yrast bands of 224−234Th isotopes. Pramana - J Phys 80, 953–970 (2013). https://doi.org/10.1007/s12043-013-0543-2

Download citation

  • Received:

  • Revised:

  • Accepted:

  • Published:

  • Issue Date:

  • DOI: https://doi.org/10.1007/s12043-013-0543-2

Keywords

PACS

Search

Navigation