The (n,p) Reaction at 60 MeV on N>Z Targets
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.
KeywordsGiant Dipole Resonance Parent Analog Observe Cross Section Inelastic Electron Scattering DWBA Calculation
Unable to display preview. Download preview PDF.
- 4.S. Fallieros & B. Goulard Nuc. Phys. A14/ (1971) 593Google Scholar
- 5.F. P. Brady et al., NBS SP425 (1975) 103 Ed R. A. Schrack and C. D. BowmanGoogle Scholar
- 7.H. W. Baer, 7th Int. Cont. on High Energy Physics and Nuc. Structure El. M. Locker, Birkhauser Verlag, Basel (1978)Google Scholar
- 10.Atlas of Photoneutron cross sections obtained with Mono-energetic Photons B. L. Berman UCRL - 94622Google Scholar
- 13.R. A. Lindgren et al., Phys. Rev. C. 14 (1976) 1789Google Scholar
- 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