The (n,p) Reaction at 60 MeV on N>Z Targets

  • N. S. P. King
  • J. L. Ullmann


Historically, the work of Obu & Terasawa1 and Measday2 provided evidence that the (n,p) reaction showed some selectivity for population of collective states. However, until the recent experiments at UC Davis, no systematic studies with resolution ≲ 1 MeV were undertaken. A comparison of the (n,p) reaction on To = 0 targets with photonuclear experiments, inelastic electron scattering (particularly at θ = 180°), radiative pion capture and hadronic probes has revealed considerable sensitivity to known collective M1 and El states.3 These properties of the (n,p) reaction are identical to those of the (p,n) reaction on the same targets since only ≲T = 1 is allowed for both. The extension of the (n,p) reaction to To ≠ 0 targets leads to the same isovector (≲T = 1) selection rule. This is not the case for the (p,n) reaction which can populate ≲T = 0, ± 1 states favoring those with ≲T = -1 and ≲T = 0. This paper presents results of the (n,p) reaction at 60 MeV on 7Li, 9Be, 27A1, 58,60,62,64Ni, 90Zr, and 209Bi targets.


Giant Dipole Resonance Parent Analog Observe Cross Section Inelastic Electron Scattering DWBA Calculation 


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  1. 1.
    M. Obu & T. T.rasawa Prog. Theor. Phys. 43 (1970) 1231ADSCrossRefGoogle Scholar
  2. 2.
    D. F. Measday & J. N. Palmieri Phys. Rev. 161 (1967) 1071ADSCrossRefGoogle Scholar
  3. 3.
    UCD Progs. Reports, Brady et al. Phys. Rev. Lett. 36 (1976) 15CrossRefGoogle Scholar
  4. 4.
    S. Fallieros & B. Goulard Nuc. Phys. A14/ (1971) 593Google Scholar
  5. 5.
    F. P. Brady et al., NBS SP425 (1975) 103 Ed R. A. Schrack and C. D. BowmanGoogle Scholar
  6. 6.
    L. W. Fagg, Rev. Mod. Phys. 47 (1975) 683ADSCrossRefGoogle Scholar
  7. 7.
    H. W. Baer, 7th Int. Cont. on High Energy Physics and Nuc. Structure El. M. Locker, Birkhauser Verlag, Basel (1978)Google Scholar
  8. 8.
    G. B. Dogotar et al., Nuc. Phys. A282 (1977) 474ADSCrossRefGoogle Scholar
  9. 9.
    M. B. Lewis and F. E. Bertrand Nuc. Phys. A196 (1972) 337ADSCrossRefGoogle Scholar
  10. 10.
    Atlas of Photoneutron cross sections obtained with Mono-energetic Photons B. L. Berman UCRL - 94622Google Scholar
  11. 11.
    G. R. Satchler, Nuc. Phys. A195 (1972) 1ADSCrossRefGoogle Scholar
  12. 12.
    C. Ngo-Trong and D. J. Rowe, Phys. Lett. 36B (1971) 553ADSGoogle Scholar
  13. 13.
    R. A. Lindgren et al., Phys. Rev. C. 14 (1976) 1789Google Scholar
  14. 14.
    M. Hasinoff et al. Nuc. Phys. A216 (1973) 221ADSCrossRefGoogle Scholar
  15. 15.
    S. Fukuda and Y. Torizuka, Phys. Lett. 62B (1976) 146ADSGoogle Scholar
  16. 16.
    J. D. Vergados and T. T. S. Kuo. Nuc. Phys. A168 (1971) 225; T. A. Hughes & S. Fallieros, in Nuc. Isospin, ed. J. D. Anderson, S. P. Bloom, J. Cerny, and W. W. True (Acad. Press, N. Y. 1969) p1O9Google Scholar
  17. 17.
    K. Snover et al., Phys. Rev. Lett. 32 (1974) 317ADSCrossRefGoogle Scholar
  18. 18.
    H. Baer et al., Phys. Rev. C. 10 (1974) 267CrossRefGoogle Scholar
  19. 19.
    M. Sasao and Y. Torizuka Phys. Rev. C. 15 (1977) 217ADSCrossRefGoogle Scholar
  20. 20.
    V. Brown and V. Madsen Phys. Rev. C. 17 (1978) 1943ADSCrossRefGoogle Scholar
  21. 21.
    F. Bertrand Ann. Rev. Nuc. Sci. 26 (1976) 457ADSCrossRefGoogle Scholar

Copyright information

© Plenum Press, New York 1980

Authors and Affiliations

  • N. S. P. King
    • 1
  • J. L. Ullmann
    • 2
  1. 1.Los Alamos Scientific LaboratoryLos AlamosUSA
  2. 2.Crocker Nuclear Laboratory and Department of PhysicsUniversity of CaliforniaDavisUSA

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