Advertisement

Acta Physica Hungarica

, Volume 69, Issue 3–4, pp 151–168 | Cite as

Statistical model calculation of the (n, xn) and (n, f) reaction cross sections for nuclei232th,238u and237Np

  • P. Raics
Nuclear Physics

Abstract

Statistical reaction model including preequilibrium emission as well as Hauser-Feshbach type contributions was applied to calculate the excitation function for the (n, xn) and (n, f) reactions up to 22 MeV bombarding energy using computer code STAPREF. The level density parameters were kept constant in excitation energy. Smalll variations of the fission threshold and the level density parameters from nuclide to nuclide within the experimental errors make it possible to achieve quite satisfactory agreement with the compilated cross sections above 3 MeV. The theoretical description of the isomeric ratio and the cross sections as a function of the neutron energy for the237Np(n, 2n) reaction may help to give recommendations for the excitation functions. Rotational parameters and decoupling constants were also calculated for ground state deformation and extrapolated to transition state.

Keywords

Rabie Excitation Function Compound Nucleus Nuclear Data 237Np 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. 1.
    N. V. Kornilov, B. V. Zhuravlev, O. A. Salnikov, P. Raics, S. Nagy, S. Daróczy, K. Sailer, J. Csikai, At. Energiya,49, 283, 1980.Google Scholar
  2. 2.
    P. Raics, S. Daróczy, J. Csikai, N. V. Kornilov, V. Ya Baryba, O. A. Salnikov, Phys. Rev.,C32, 87, 1985.CrossRefADSGoogle Scholar
  3. 3.
    N. V. Kornilov, V. Ya. Baryba, A. V. Balickiy, A. P. Rudenko, B. D. Kuzminov, O. A. Salnikov, E. A. Gromova, S. S. Kovalenko, L. D. Preobrazhenskaya, Yu. A. Selickiy, B. I. tarler, V. B. Funstein, B. A. Yakovlev, S. Daróczy, P. Raics, J. Csikai, At. Energiya,58, 117, 1985.Google Scholar
  4. 4.
    P. Raics, Candidate Thesis, KLTE, Institute for Experimental Physics, Debrecen, 1990.Google Scholar
  5. 5.
    N. V. Kornilov, V. N. Vinogradov, E. V. Gay, N. S. Rabotnov, O. A. Salnikov, P. Raics, S. Daróczy, S. Nagy, J. Csikai, VANT, ser. Yad. Konst.,1 (45) 33, 1982.Google Scholar
  6. 6.
    N. V. Kornilov, S. A. Badikov, P. Raics, S. Daróczy, to be published in VANT, ser. Yad. Konst., 1990; N. V. Kornilov, P. Raics, Acta Phys. Hung.,69, 143, 1991.Google Scholar
  7. 7.
    S. Daróczy, P. Raics, J. Csikai, Neytronnaja Fizika, t. I. 228. Mat. Vsesoyuznogo Sov. 24–28 Maya 1971, Kiev, Izd. Naukova Dumka, Kiev, 1972.Google Scholar
  8. 8.
    S. Pearlstein, Nucl. Sci. Eng.,23, 238, 1965.Google Scholar
  9. 9.
    M. L. Jhingan, R. P. Anand, S. K. Gupta, M. K. Mehta, Acta Phys. Hung.,55, 195, 1984.Google Scholar
  10. 10.
    P. Raics, Thesis, KLTE, Institute for Experimental Physics, Debrecen, 1978.Google Scholar
  11. 11.
    P. Raics, F. Pászti, S. Daróczy, S. Nagy, ATOMKI Közl.,23, 45, 1980.Google Scholar
  12. 12.
    N. Bohr, Nature,137, 344, 1936.CrossRefADSGoogle Scholar
  13. 13.
    N. Bohr, J. A. Wheeler, Phys. Rev.,56, 426, 1939.MATHCrossRefADSGoogle Scholar
  14. 14.
    J. M. Blatt, V. F. Weisskopf, Theoretical Nuclear Physics, J. Wiley, New York, 1952.MATHGoogle Scholar
  15. 15.
    Ch. Lagrange, Determination of a coherent parameter set for coupled channel calculations of U-238 neutron cross sections from 10 keV to 20 MeV. Int. Symp. on Neutron Induced Reactions, Smolenice, 1–7 Sept. 1974.Google Scholar
  16. 16.
    J. Jary, Ch. Langrange, P. Thomet, Coherent optical and statistical model calculations of neutron cross sections for U-238 between 1 keV and 20 MeV. INDC(FR) 9/L, NEANDC(E) 174 “L”, CEA, France, 1977.Google Scholar
  17. 17.
    J. Jary, Section efficace des reactions (n, xn) and (n, xnf) des noyaux Th-231, Th-233 dans le domain d’energie 1 keV—20 MeV. CEA-N-1971, NEANDC(E) 178 “L”, NDC(FR) 15/L, Bruyeres-le-Chatel, 1977.Google Scholar
  18. 18.
    A. Prince, Nuclear Data for Reactors Vol. 2. 825, Proc. Int. Conf. 15–19 June 1970, Helsinki, IAEA, Vienna, 1971.Google Scholar
  19. 19.
    C. L. Dunford, Nuclear Data for Reactors, Vol. 1. 429, Proc. Conf. 17–21, Oct. 1966, Paris, IAEA Vienna, 1967.Google Scholar
  20. 20.
    H. Karius, A. Ackermann, W. Scobel, J. Phys.,G. 5, 715, 1979.ADSGoogle Scholar
  21. 21.
    V. Ignatyuk, V. M. Maslov, A. B. Pashchenko, Yad. Fizika,47, 355, 1988.Google Scholar
  22. 22.
    G. Vasiliu, S. Mateescu, D. Gheorge, M. Ciondaru, E. Badescu, N. Dragan, O. Bujoreanu, C. Cracium, L. Pintielescu, M. Zaharcu, D. Popescu, D. Statnicov, V. Aorigeanu, Nuclear Data Evaluation for Th-232 IAEA Rep. INDC (RUM)-10, IAEA, Vienna, 1980.Google Scholar
  23. 23.
    M. Segev, M. Caner, Ann. Nucl. En.,5, 239, 1978.CrossRefGoogle Scholar
  24. 24.
    A. V. Ignatyuk, N. V. Kornilov, V. M. Maslov, At. Energiya,63, 110, 1987.Google Scholar
  25. 25.
    D. G. Gardner, M. A. Gardner, Some neutron and photon reactions on the ground and isomeric states of236, 237Np. Spec. Meeting on Neutron Activation Cross Sections for Fission and Fusion Applications, NEA/NDC, ANL, Sept 13–15, 1989, UCRL-101613/1989.Google Scholar
  26. 26.
    J. J. Griffin, Phys. Lett.,17, 478, 1966.CrossRefGoogle Scholar
  27. 27.
    C. K. Cline, M. Blann, Nucl. Phys.,A172, 225, 1971.CrossRefGoogle Scholar
  28. 28.
    G. M. Braga-Marcazzan, E. Gadioli-Erba, L. Millazzo-Colli, P. G. Sona, Phys. Rev.,C6, 1398, 1972.CrossRefADSGoogle Scholar
  29. 29.
    C. Kalbach, Acta Phys. Slov.,25, 100, 1975.Google Scholar
  30. 30.
    W. Hauser, H. Feshbach, Phys. Rev.,87, 336, 1952.CrossRefADSGoogle Scholar
  31. 31.
    M. Uhl, B. Strohmaier, STAPRE. A computer code for particle induced activation cross sections and related quantities. IRK 76/01, Vienna, 1976. Addendae: 1976, 1978, 1979, 1981, 1983.Google Scholar
  32. 32.
    H. Gruppelaar, P. Nagel, International nuclear model and code comparison on preequilibrium effects. Newsletter,32, 1985, NEANDC-204 “U”, INDC (NEA) 6.Google Scholar
  33. 33.
    O. Bersillion, CEA Rap. 2227, Bruyer-le-Chatel, 1977, Mod. 1979.Google Scholar
  34. 34.
    V. Goulo, STAPRE and SCAT2 — Statistical preequilibrium and optical nuclear model codes for personal computers IBM/AT, IAEA-NDS-99, Vienna, 1988.Google Scholar
  35. 35.
    J. J. Schmidt, Fast neutron nuclear data for U-238 in the energy region 1 keV to 10 MeV. Neutron Cross Sections for Fast Reactor Materials, I, eval. 1. KFK 120, EANDC-E-35-U, Karlsruhe, 1966.Google Scholar
  36. 36.
    T. A. Pitterle, Paper No. CN26/83 in Proc. Conf. on Nuclear Data for Reactors, Helsinki, 15–19 June, 1970.Google Scholar
  37. 37.
    D. Wilmore, P. E. Hodgson, Nucl. Phys.,55, 673, 1964.CrossRefGoogle Scholar
  38. 38.
    P. Marmier, E. Sheldon, Physics of Nuclei and Particles, Academic Press, New York, 1970.Google Scholar
  39. 39.
    F. D. Becchetti, G. W. Greenlees, Phys. Rev.,182 1190, 1969.CrossRefADSGoogle Scholar
  40. 40.
    W. P. Poenitz, J. F. Whalen, A. B. Smith, Nuclear Cross Sections for Technology, 698 (Proc. Int. Conf. 22–26 Oct. 1979, Knoxville, ed. J. L. Fowler, C. H. Johnson, C. D. Bowman), NBS 1980.Google Scholar
  41. 41.
    D. G. Madland, P. G. Young, Neutron Physics and Nuclear Data for Reactors and Other Applied Purposes, 349, Proc. Int. Conf. 25–29 Sept 1978 Harwell, OECD Nucl. En. Ag.Google Scholar
  42. 42.
    E. D. Arthur, Rep. LA-7596-PR, Am. Phys. Soc. Meeting, Asimolar, California, Oct 1978.Google Scholar
  43. 43.
    N. S. Biryukov, B. V. Zhuravlev, N. V. Kornilov, A. P. Rudenko, O. A. Salnikov, V. I. Trykova, Neytronnaya Fizika, t. 2. 22, Mat. 4. Vsesoyuznoy Konf., Kiev, 18–22 Apr. 1977.Google Scholar
  44. 44.
    V. M. Bychkov, N. V. Kornilov, V. I. Plyaskin, O. A. Salnikov, V. I. Trykova, Neytronnaja Fizika, t. 2. 79, Mat. 4. Vsesoyuznoy Konf., Kiev, 18–22 Apr. 1977.Google Scholar
  45. 45.
    A. Ackermann, B. Anders, M. Borman, W. Scoi’bel, Nuclear Cross Sections and Technology, Vol. 2. 819, Proc. Conf. Washington, March 3–7 1975, NBS Spec. Publ. 425.Google Scholar
  46. 46.
    V. A. Konshin, Yaderno-fizicheskie konstanty delyashchikhsya yader. Spravochnik, Energoatomizdat, Moskva, 1984.Google Scholar
  47. 47.
    N. V. Kornilov, V. Ya. Baryba, O. A. Salnikov, Neytronnaya Fizika, t. 3. 104, mat. Vsesoyuznoy Konf. Kiev, 1980, CNII Atominform, Moskva, 1980.Google Scholar
  48. 48.
    A. Gilbert, A. G. W. Cameron, Can. J. Phys.,43, 1446, 1965.ADSGoogle Scholar
  49. 49.
    H. K. Vonach, M. Hille, Nucl. Phys., A127, 289, 1969.CrossRefADSGoogle Scholar
  50. 50.
    W. Dilg, W. Schantl, H. Vonach, Nucl. Phys.,A217 269, 1973.CrossRefGoogle Scholar
  51. 51.
    C. M. Lederer, V. S. Shirley (ed.), Table of Isotopes, 7th ed. John Wiley, New York, 1978.Google Scholar
  52. 52.
    A. H. Wapstra, G. Audi, Nucl. Phys.,A432, 1, 1985.CrossRefGoogle Scholar
  53. 53.
    J. E. Lynn, Cross-section theory for actinide nuclei, p. 941 in A. Michaudon (ed.), Nuclear Fission and Neutron-Induced Fission Cross-Sections, Pergamon Press, Oxford, 1981.Google Scholar
  54. 54.
    M. S. Moore, Neutron Physics and Nuclear Data for Reactors and Other Applied Purposes, 313, Proc. Int. Conf. 25–29 Sept 1978, Harwell, OECD Nuclear Energy Agency, Harwell, 1978.Google Scholar
  55. 55.
    R. Vandenbosch, J. R. Huizenga, Nuclear Fission, Academic Press, New York, 1973.Google Scholar
  56. 56.
    B. B. Back, O. Hansen, H. C. Britt, J. D. Garret, Phys. Rev.,C9, 1924, 1974.ADSMathSciNetGoogle Scholar
  57. 57.
    B. B. Back, H. C. Britt, O. Hansen, B. Leroux, J. D. Garret, Phys. Rev.,C10, 1948, 1974.CrossRefADSGoogle Scholar
  58. 58.
    W. M. Howard, P. Möller, At. Data Nucl. Data Tabl.,25, 219, 1980.CrossRefADSGoogle Scholar
  59. 59.
    A. Bohr, B. R. Mottelson, Nuclear Structure, Vol. 2.: Nuclear Deformations, Russian Edition, Mir, Moskva, 1974.Google Scholar
  60. 60.
    S. G. Nilsson, Chin Fu Tsang, A. Sobiczewski, Z. Szymanski, S. Wycech, Nucl. Phys.,A131, 1, 1969.CrossRefGoogle Scholar
  61. 61.
    A. Sobiczewski, Z. Szymanski, S. Wycech, S. G. Nilsson, J. R. Nix, Chin Fu Tsang, C. Gustafson, P. Möller, B. Nilsson, Nucl. Phys.,A131, 67, 1969.CrossRefGoogle Scholar
  62. 62.
    I. Angeli, Candidate Thesis, KLTE, Institute for Experimental Physics. Debrecen, 1970.Google Scholar
  63. 63.
    I. Angeli, J. Csikai, P. Nagy, Nucl. Sci. Eng.,55, 418, 1974.Google Scholar
  64. 64.
    H. M. Jain, M. K. Mehta, Nuclear Data for Science and Technology, 657, Proc. Int. Conf., 1982, Antwerp, ed. H. Böckhoff, ECSC, EEC, EAEC, Brussel, 1983.Google Scholar
  65. 65.
    M. H. McTaggart, H. Goodfellow, Reactor Sci. Tech. (J. Nucl. En. A.B),17, 437, 1963.Google Scholar
  66. 66.
    V. M. Kupriyanov, G. N. Smirenkin, B. I. Fursov, VANT, ser. Yad. Konst.,5, (49), 3, 1982.Google Scholar
  67. 67.
    V. B. Bychkov, V. I. Plyaskin, VANT, ser. Yad. Konst.,1, (40), 5, 1981.Google Scholar
  68. 68.
    V. B. Bychkov, V. I. Plyaskin, E. F. Toshinkaya, VANT, ser. Yad. Konst.,3, (42), 26, 1981.Google Scholar
  69. 69.
    E. Fort, H. Derrien, J. P. Doat, Nuclear Data for Science and Technology, 673, Proc. Conf. 6–10 Sept 1982, Antwerp.Google Scholar
  70. 70.
    W. A. Myers, M. Lindner, R. S. Newbury, J. Inorg. Nucl. Chem.,37, 637, 1975.CrossRefGoogle Scholar
  71. 71.
    R. Vandenbosch, J. R. Huizenga, Nuclear Fission, Academic Press, New York, 1973.Google Scholar
  72. 72.
    V. M. Maslov, VANT, ser. Yad. Konst.,4, 19, 1987.Google Scholar
  73. 73.
    M. Lindner, R. J. Dupzyk, R. W. Hoff, R. J. Nagle, J. Inorg. Nucl. Chem.,43, 3071, 1981.CrossRefGoogle Scholar
  74. 74.
    P. C. Sood, Z. Phys. A. — Atoms and Nucl.,318, 111, 1984.CrossRefGoogle Scholar
  75. 75.
    M. Segev, M. Caner, Ann. Nucl. En.,5, 239, 1978.CrossRefGoogle Scholar
  76. 76.
    E. A. Gromova, S. S. Kovalenko, Yu. A. Selitskiy, B. I. Tarler, V. B. Funstein, V. A. Yakovlev, At. Energiya,60, 68, 1986.Google Scholar
  77. 77.
    H. W. Wiese, U. Fisher, B. Goel, Nucl. Data for Sci. and Techn. 202, Proc. Int. Conf. Antwerp, 6–10 Sept 1982.Google Scholar
  78. 78.
    J. L. Perkin, R. F. Coleman, J. Nucl. En.,14, 69, 1961.Google Scholar
  79. 79.
    J. H. Landrum, R. J. Nagle, M. Lindner, Phys. Rev.,C8, 1938, 1973.CrossRefADSGoogle Scholar
  80. 80.
    K. Lindeke, S. Specht, H.-J. Born, Phys. Rev.,C12, 1507, 1975.CrossRefADSGoogle Scholar
  81. 81.
    T. Nishi, I. Fujiwara, N. Imanishi, private communication to I. Igarashi, Trans. Isot. Nucl. Data, Vol. III. 48, IAEA-186, 1976, cited in Ref. [23].Google Scholar

Copyright information

© Akadémiai Kiadó 1991

Authors and Affiliations

  • P. Raics
    • 1
  1. 1.Institute of Experimental PhysicsKossuth Lajos UniversityDebrecenHungary

Personalised recommendations