Advertisement

Pramana

, Volume 61, Issue 6, pp 1157–1162 | Cite as

Observation of high spin levels in131Cs from131Ba decay

  • M. Sainath
  • Dwaraka Rani Rao
  • K. Venkataramaniah
  • P. C. Sood
Article

Abstract

The γ- and conversion electron spectra following131Ba ε-decay are investigated, using HPGe detector and mini-orange electron spectrometer. Attention is particularly focussed on identifying weak transitions associated with low energy high spin levels in131Cs level scheme earlier inferred in reaction studies but not yet observed in131Ba decay. Our experiment identifies 15 new gammas and 6 new conversion lines in this decay. Internal conversion coefficients and multipolarities of several transitions are determined. Five new levels (3 with Iπ = 7/2+ and one each with Iπ 9/2+ and 11/2) are introduced in the131Cs level scheme based on our observations taken together with the results from reaction studies. Spin-parity assignments to a few other levels are also suggested

Keywords

Radioactivity 131Ba beta decay γ and ce measured HPGe miniorange internal conversion coefficient multipolarities 131Cs level scheme 

PACS Nos

23.20.Lv 23.20.Nx 27.60.+j 

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. [1]
    Table of isotopes 8th edn, edited by R B Firestone and V S Shirley (Wiley, New York, 1996)Google Scholar
  2. [2]
    M Sainath, K Venkataramaniah and P C Sood,Phys. Rev. C56, 2468 (1997)ADSGoogle Scholar
  3. [3]
    U Garg, T P Sjoreen and D B Fossan,Phys. Rev. C19, 207 (1979)ADSGoogle Scholar
  4. [4]
    D C Palmer, N M Hintz, D Ingham and S Kubono, Report COO-1265-190 (1997) p. 124;Nucl. Data Sheets 72, 553 (1994)Google Scholar
  5. [5]
    Sun Huibin, L Yunzuo, Hu Dailing, Z Jiewen and Li Yuan,Z. Phys. A336, 37 (1990)ADSGoogle Scholar
  6. [6]
    B Chand, J Goswamy, D Mehta, S Singh, M L Garg, N Singh and P N Trehan,Nucl. Instrum. Methods A273, 310 (1988)ADSGoogle Scholar
  7. [7]
    R G Gehrke, R G Helmer, C W Reich, R C Greenwood and R A Anderl,Phys. Rev. C14, 1896 (1976)ADSGoogle Scholar
  8. [8]
    A Morinaga and K Hisatake,J. Phys. Soc. Jpn. 38, 322 (1975)CrossRefADSGoogle Scholar
  9. [9]
    D J Horen, J M Hollander and R L Graham,Phys. Rev. B135, 301 (1964)CrossRefADSGoogle Scholar
  10. [10]
    W H Kelly and D J Horen,Nucl. Phys. 47, 454 (1963)CrossRefGoogle Scholar
  11. [11]
    Yu V Sergeenkov, Yu L Khazov, T W Burrows and M R Bhat,Nucl. Data Sheets 72, 487 (1994)CrossRefADSGoogle Scholar
  12. [12]
    M Sainath, Dwaraka Rani Rao, R Gowrishankar, K L Narasimham, K Venkataramaniah and P C Sood,DAE-BRNS Symp. Nucl. Phys. B45, 74, (2002)Google Scholar
  13. [13]
    M Sainath, K Venkataramaniah and P C Sood,Phys. Rev. C58, 3730 (1998)ADSGoogle Scholar
  14. [14]
    V Petkov and N Bakaltchev,J. Appl. Crystallogr. 23, 138 (1990)CrossRefGoogle Scholar
  15. [15]
    Program Packages GTOL (version 6.2), ENSDAT (version 3.92) and HSICC (version 11(12), August 15, 1994) NNDC, Brookhaven, USAGoogle Scholar
  16. [16]
    M Sainath, K Venkataramaniah and P C Sood,PramanaJ. Phys. 53, 289 (1999)ADSGoogle Scholar
  17. [17]
    R S Hager and E C Seltzer,Nucl. Data Sheets 4, 1 (1968)CrossRefGoogle Scholar

Copyright information

© Indian Academy of Sciences 2003

Authors and Affiliations

  • M. Sainath
    • 1
  • Dwaraka Rani Rao
    • 1
  • K. Venkataramaniah
    • 1
  • P. C. Sood
    • 1
  1. 1.Department of PhysicsSri Sathya Sai Institute of Higher LearningPrasanthinilayamIndia

Personalised recommendations