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A study of pre-equilibrium emission of neutrons in 93Nb(α, xn) reactions

  • Regular Article - Nuclear Structure and Reactions
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Abstract.

With a view to study the pre-equilibrium emission mechanism in α-induced reactions the excitation functions for 93Nb(α, n)96mTc, 93Nb(α, n)96Tc, 93Nb(α, 2n)95mTc, 93Nb(α, 2n)95gTc and 93Nb(α, 3n)94Tc reactions have been measured in the energy range threshold to ≈ 10MeV/nucleon using the activation technique. The measured excitation functions have also been compared with theoretical predictions based on the semi-classical code, which takes into account compound nucleus as well as pre-equilibrium emission. The analysis of the data indicates significant contribution from pre-equilibrium emission at these energies particularly in the high-energy tail portion of EFs. The effect of the variation of the parameters used in the code has been studied. The isomeric cross-section ratios have also been measured. It has been observed that the pre-equilibrium fraction increases rapidly with the increase in α-particle bombarding energy.

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References

  1. M. Blann, Ann. Nucl. Sci. 25, 123 (1975).

    Article  ADS  Google Scholar 

  2. J. Pal, C.C. Dey, P. Banerjee, S. Bose, B.K. Sinha, M.B. Chatterjee, Phys. Rev. C 71, 03605 (2005).

    Article  Google Scholar 

  3. B.P. Singh, Manoj K. Sharma, M.M. Muthafa, H.D. Bhardwaj, R. Prasad, Nucl. Instrum. Methods Phys. Res. A 562, 717 (2006).

    Article  ADS  Google Scholar 

  4. S. Mukherjee, N.L. Singh, G. Kiran Kumar, L. Chaturvedi, Phys. Rev. C 72, 014609 (2005).

    Article  ADS  Google Scholar 

  5. T. Matsuo, J.M. Matuszek jr., N.D. Dudey, T.T. Sugihara, Phys. Rev. B 139, 886 (1965).

    Article  ADS  Google Scholar 

  6. C.L. Branquihno, S.M.A. Hoffmann, G.W.A. Newton, V.J. Robinson, H.Y. Wang, I.S. Grant, J. Inorg. Nucl. Chem. 41, 617 (1970).

    Article  Google Scholar 

  7. P. Bond, S. Jha, Phys. Rev. C 2, 1887 (1974).

    Article  ADS  Google Scholar 

  8. E. Gadioli, E. Gadiolli-Ebra, J.J. Hogan, B.V. Jacab, Phys. Rev. C 29, 76 (1984).

    Article  ADS  Google Scholar 

  9. J. Ernst, W. Friedland, H. Stockhorst, Z. Phys. A 308, 301 (1982).

    Article  Google Scholar 

  10. J. Ernst, W. Friedland, H. Stockhorst, Z. Phys. A 328, 333 (1987).

    Google Scholar 

  11. M. Uhl, B. Strohmair, Report IRK 76/01 (1981) NEA Data Bank (Cedex) France.

  12. M. Blann, NEA Data Bank, Gif-sur-Yvette, France, Report PSR-146 (1991).

  13. F. Puhlhofer, Nucl. Phys. A 280, 267 (1977).

    Article  ADS  Google Scholar 

  14. A. Garvon, Phys. Rev. C 21, 230 (1980).

    Article  ADS  Google Scholar 

  15. H.D. Bhardwaj, PhD Thesis, A.M.U. Aligarh, India (1985).

  16. W. Hauser, H. Feshbach, Phys. Rev. 87, 366 (1952).

    Article  ADS  MATH  Google Scholar 

  17. J.J. Griffin, Phys. Rev. Lett. 17, 478 (1966)

    Article  ADS  Google Scholar 

  18. L.C. Northcliffe, R.F. Schilling, Nucl. Data Tables A 7, 256 (1970).

    Article  Google Scholar 

  19. C.M. Lederer, V.S. Shirley, Table of Isotopes VII (John Wiley, New York, 1978).

  20. N.L. Singh, Can. J. Phys. 67, 870 (1989).

    Google Scholar 

  21. J.M. Matuszek jr., T.T. Sugihara, Nucl. Phys. 42, 582 (1963).

    Article  Google Scholar 

  22. R. Serber, Phys. Rev. 72, 1114 (1947).

    Article  ADS  Google Scholar 

  23. M. Blann, Phys. Rev. Lett. 27, 337 (1971).

    Article  ADS  Google Scholar 

  24. M. Blann, Phys. Rev. Lett. 28, 757 (1972).

    Article  ADS  Google Scholar 

  25. H. Feshbach, A. Kerman, S. Koonin, Ann. Phys. 125, 429 (1980).

    Article  MathSciNet  ADS  Google Scholar 

  26. Klaus Debertin, Richard G. Helmer Gamma-and X-Ray spectrometry with semiconductor detector (Elsevier Science Publisher B.V., Amsterdam, 1988).

  27. D. Agassi, H.A. Weidenmuller, G. Mantzouranis, Phys. Rep. 22, 145 (1975).

    Article  ADS  Google Scholar 

  28. T. Udagawa, K.S. Low, T. Tamura, Phys. Rev. C 28, 1033 (1983).

    Article  ADS  Google Scholar 

  29. H. Gruppelaar, P. Nagel, P.E. Hodgson, Riv. Nuovo. Cimento 9, No. 1 (1986).

  30. D.W. Lang, Nucl. Phys. 77, 545 (1966).

    Article  Google Scholar 

  31. W. Dilg, W. Schantl, H. Vonach, Nucl. Phys. A 217, 269 (1973).

    Article  ADS  Google Scholar 

  32. S. Sudar, S.M. Qaim, Phys. Rev. C 73, 034613 (2006).

    Article  ADS  Google Scholar 

  33. B.P. Singh, H.D. Bhardwaj, R. Prasad, Can. J. Phys. 69, 1376 (1991).

    Google Scholar 

  34. M. Blann, H.K. Vonach, Phys. Rev. C 28, 1475 (1983).

    Article  ADS  Google Scholar 

  35. A.H. Wapstra, K. Bos, At. Data Nucl. Data Tables 19, 215 (1977).

    Article  ADS  Google Scholar 

  36. F.C. Williams jr., Phys. Rev. Lett. B 31, 184 (1970).

    ADS  Google Scholar 

  37. C.K. Cline, Nucl. Phys. A 186, 273 (1972).

    Article  ADS  Google Scholar 

  38. H. Jahn, Nuclear Theory for Applications, IAEA-SMR 93 report (1982) p. 39.

  39. C. Kalbach-Cline, Nucl. Phys. A 210, 590 (1973).

    Article  ADS  Google Scholar 

  40. K.K. Gudima, S.G. Mashnik, V.D. Toneev, Nucl. Phys. A 401, 329 (1983).

    Article  ADS  Google Scholar 

  41. B.P. Singh, M.G.V. Sankaracharyulu, M. Afzal Ansari, H.D. Bhardwaj, R. Prasad, Phys. Rev. C 47, 2055 (1993).

    Article  ADS  Google Scholar 

  42. B.P. Singh, PhD Thesis, Aligarh Muslim University, India (1992).

  43. N.D. Dudey, T.T. Sugihara, Phys. Rev. B 139, 886 (1969).

    Google Scholar 

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Authors and Affiliations

  1. Department of Physics, Aligarh Muslim University, (UP)-202 002, Aligarh, India

    Manoj Kumar Sharma,  Unnati, Pushpendra P. Singh, B. P. Singh & R. Prasad

  2. Department of Physics, DSN College, (UP)-209 801, Unnao, India

    H. D. Bhardwaj

Authors
  1. Manoj Kumar Sharma
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  2. H. D. Bhardwaj
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  3. Unnati
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  4. Pushpendra P. Singh
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  5. B. P. Singh
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  6. R. Prasad
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Kumar Sharma, M., Bhardwaj, H.D., Unnati et al. A study of pre-equilibrium emission of neutrons in 93Nb(α, xn) reactions. Eur. Phys. J. A 31, 43–51 (2007). https://doi.org/10.1140/epja/i2005-10318-5

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