Lifetime measurements in shape transition nucleus 188Pt

  • Aman Rohilla
  • C. K. Gupta
  • R. P. Singh
  • S. Muralithar
  • S. Chakraborty
  • H. P. Sharma
  • A. Kumar
  • I. M. Govil
  • D. C. Biswas
  • S. K. Chamoli
Regular Article - Experimental Physics
  • 92 Downloads

Abstract.

Nuclear level lifetimes of high spin states in yrast and non-yrast bands of 188Pt nucleus have been measured using recoil distance plunger setup present at IUAC, Delhi. In the experiment nuclear states of interest were populated via 174Yb(18O,4n)188Pt reaction at a beam energy of 79MeV provided by 15 UD Pelletron accelerator. The extracted \(B(E2\downarrow)\) values show an initial rise up to \(4^{+}\) state and then a nearly constant behavior with spin along yrast band, indicating change of nuclear structure in 188Pt at low spins. The good agreement between experimental and TPSM model \(B(E2\downarrow)\) values up to \( 4^+\) state suggests an increase in axial deformation of the nucleus. The average absolute \(\beta_{2} = 0.20 (3)\) obtained from measured \(B(E2\downarrow)\) values matches well the values predicted by CHFB and IBM calculations for oblate (\( \beta_{2} \sim -0.19\)) and prolate (\(\beta_{2} \sim 0.22\)) shapes. As the lifetime measurements do not yield the sign of \( \beta_{2}\), no definite conclusion can be drawn on the prolate or oblate collectivity of 188Pt on the basis of present measurements.

References

  1. 1.
    F. Hannachi, G. Bastin, M. Porquet et al., Nucl. Phys. A 481, 135 (1988)ADSCrossRefGoogle Scholar
  2. 2.
    R. Jenssens, P. Chowdhury et al., Phys. Lett. B 131, 35 (1983)ADSCrossRefGoogle Scholar
  3. 3.
    G.D. Dracoulis, Phys. Rev. C 49, 3324 (1994)ADSCrossRefGoogle Scholar
  4. 4.
    R. Julin, K. Helariutta, M. Muikku, J. Phys. G 27, R109 (2001)ADSCrossRefGoogle Scholar
  5. 5.
    G. Lane, G. Dracoulis, A. Byrne et al., Phys. Lett. B 324, 14 (1994)ADSCrossRefGoogle Scholar
  6. 6.
    W. Reviol, D.E. Ellis et al., Phys. Rev. C 58, R2644 (1998)ADSCrossRefGoogle Scholar
  7. 7.
    D. Rupnik, E.F. Zganjar et al., Phys. Rev. C 58, 771 (1998)ADSCrossRefGoogle Scholar
  8. 8.
    Kris Heyde, John L. Wood, Rev. Mod. Phys. 83, 1467 (2011) and references thereinADSCrossRefGoogle Scholar
  9. 9.
    B. Roussière et al., Hyperfine Interact. 43, 473 (1988)ADSCrossRefGoogle Scholar
  10. 10.
    J.K.P. Lee et al., Phys. Rev. C 38, 2985 (1988)ADSCrossRefGoogle Scholar
  11. 11.
    P.G. Varmette et al., Phys. Lett. B 410, 103 (1997)ADSCrossRefGoogle Scholar
  12. 12.
    Lu Guo, J.A. Maruhn, P.G. Reinhard, Phys. Rev. C 76, 034317 (2007)ADSCrossRefGoogle Scholar
  13. 13.
    Kris Heyde, John L. Wood, Rev. Mod. Phys. 83, 1467 (2011)ADSCrossRefGoogle Scholar
  14. 14.
    M. Bender, P. Bonche, P.H. Heenen, Phys. Rev. C 74, 024312 (2006)ADSCrossRefGoogle Scholar
  15. 15.
    C. Chandler et al., Phys. Rev. C 56, R2924 (1997)ADSCrossRefGoogle Scholar
  16. 16.
    F. Becker et al., Eur. Phys. J. A 4, 103 (1999)ADSCrossRefGoogle Scholar
  17. 17.
    E. Bouchez et al., Phys. Rev. Lett. 90, 2444 (1995)Google Scholar
  18. 18.
    J.E. Gracía, K. Heyde et al., Phys. Rev. C 89, 034313 (2014)ADSCrossRefGoogle Scholar
  19. 19.
    P. Buganu et al., Nucl. Part. Phys. 42, 105106 (2015)ADSCrossRefGoogle Scholar
  20. 20.
    G.H. Bhat et al., Phys. Rev. C 86, 047307 (2012)ADSCrossRefGoogle Scholar
  21. 21.
    K. Nomura et al., Phys. Rev. C 84, 054316 (2011)ADSCrossRefGoogle Scholar
  22. 22.
    Bao-An Bian et al., Phys. Rev. C 75, 014312 (2007)ADSCrossRefGoogle Scholar
  23. 23.
    E.A. McCutchan et al., Phys. Rev. C 71, 061301(R) (2005)ADSCrossRefGoogle Scholar
  24. 24.
    J.P. Delaroche et al., Phys. Rev. C 81, 014303 (2010)ADSCrossRefGoogle Scholar
  25. 25.
    U. Garg et al., Phys. Lett. B 180, 319 (1986)ADSCrossRefGoogle Scholar
  26. 26.
    G.D. Dracoulis et al., J. Phys. G 12, L97 (1986)ADSCrossRefGoogle Scholar
  27. 27.
    J.C. Walpe, U. Garg et al., Phys. Rev. C 85, 057302 (2012)ADSCrossRefGoogle Scholar
  28. 28.
    A. Arima, F. Iachello, Phys. Rev. Lett. 35, 1069 (1975)ADSCrossRefGoogle Scholar
  29. 29.
    R. Bengtsson, Nucl. Phys. A 520, 201c (1990)ADSCrossRefGoogle Scholar
  30. 30.
    S.K. Chamoli et al., Phys. Rev. C 66, 024307 (2002)ADSCrossRefGoogle Scholar
  31. 31.
    S.K. Chamoli et al., Phys. Rev. C 69, 034310 (2004)ADSCrossRefGoogle Scholar
  32. 32.
    H.-Q. Jin, L.L. Riedinger et al., Phys. Rev. C 53, 2106 (1996)ADSCrossRefGoogle Scholar
  33. 33.
    D.G. Popescus et al., Phys. Rev. C 55, 1175 (1997)ADSCrossRefGoogle Scholar
  34. 34.
    M. Carpenter et al., Nucl. Phys. A 513, 125 (1990)ADSCrossRefGoogle Scholar
  35. 35.
    G. Hebbinghaus et al., Nucl. Phys. A 514, 225 (1990)ADSCrossRefGoogle Scholar
  36. 36.
    S. Mukhopadhyay, D.C. Biswas et al., Phys. Lett. B 739, 462 (2014)ADSCrossRefGoogle Scholar
  37. 37.
    L. Yuan et al., Chin. Phys. Lett. 25, 1633 (2008)ADSCrossRefGoogle Scholar
  38. 38.
    T. Alexander, A. Bell, Nucl. Instrum. Methods 81, 22 (1970)ADSCrossRefGoogle Scholar
  39. 39.
    P. Ring, P. Schuck, The Nuclear Many Body Problems (Springer-Verlag, Berlin, 1980) p. 244Google Scholar
  40. 40.
    W. Nazarewicz, M.A. Riley, J.D. Garrett, Nucl. Phys. A 512, 61 (1990)ADSCrossRefGoogle Scholar
  41. 41.
    Aman Rohilla, C.K. Gupta, in Proceedings of the DAE Symposium on Nuclear Physics, Vol. 59, (2014) p. 276Google Scholar
  42. 42.
    Aman Rohilla, C.K. Gupta et al., Nucl. Instrum. Methods Phys. Res. A 797, 230 (2015)ADSCrossRefGoogle Scholar
  43. 43.
    S.K. Chamoli, Nuclear Structure Study at High Spins, ISBN-978-3-8473-7018-5 (LAP Lambert Academic Publishing, 2012)Google Scholar
  44. 44.
    James F. Zeigler, http://www.srim.org/
  45. 45.
    J.C. Wells, Report ORNL/TM 9105 (1991)Google Scholar
  46. 46.
    R. Clark, N. Rowley, J. Phys. G 18, 1515 (1992) and references thereinADSCrossRefGoogle Scholar
  47. 47.
    R. Rascher et al., Phys. Rev. C 13, 1217 (1976)ADSCrossRefGoogle Scholar
  48. 48.
    F. James, M. Ross, Comput. Phys. Commun. 10, 343 (1975)ADSCrossRefGoogle Scholar
  49. 49.
    L. Richter et al., Nucl. Phys. A 319, 221 (1979)ADSCrossRefGoogle Scholar
  50. 50.
    M. Finger et al., Nucl. Phys. A 188, 369 (1972)ADSCrossRefGoogle Scholar
  51. 51.
    T.R. Werner, J. Dudek, At. Data Nucl. Data Tables 59, 1 (1995)ADSCrossRefGoogle Scholar
  52. 52.
    T.R. Werner, J. Dudek, At. Data Nucl. Data Tables 50, 179 (1992)ADSCrossRefGoogle Scholar
  53. 53.
    S.G. Nilsson, I. Ragnarsson, Shapes and Shells in Nuclear Structure (Cambridge University Press, Cambridge, England, 1995) p. 290. Google Scholar
  54. 54.
    V.M. Strutinsky, Yad. Fiz. 3, 614 (1966) Nucl. Phys. A 95Google Scholar
  55. 55.
    J.C. Walpe, U. Garg, arXiv:1204.4661v1 [nucl-ex] (2012)
  56. 56.
    B. Singh et al., Nucl. Data Sheets 95, 387 (2002)ADSCrossRefGoogle Scholar

Copyright information

© SIF, Springer-Verlag Berlin Heidelberg 2017

Authors and Affiliations

  • Aman Rohilla
    • 1
  • C. K. Gupta
    • 1
  • R. P. Singh
    • 2
  • S. Muralithar
    • 2
  • S. Chakraborty
    • 3
  • H. P. Sharma
    • 3
  • A. Kumar
    • 4
  • I. M. Govil
    • 4
  • D. C. Biswas
    • 5
  • S. K. Chamoli
    • 1
  1. 1.Department of Physics and AstrophysicsUniversity of DelhiNew DelhiIndia
  2. 2.Inter University Accelerator CentreNew DelhiIndia
  3. 3.Department of PhysicsBanaras Hindu UniversityVaranasi (U.P.)India
  4. 4.Department of PhysicsPanjab UniversityChandigarhIndia
  5. 5.Nuclear Physics DivisionBhabha Atomic Research CenterTrombay, MumbaiIndia

Personalised recommendations