Abstract
A method allowing the inclusion of single particle resonances in the microscopic treatment of the nuclear reaction process is presented. The method based on the K matrix formalism is seen to dampen the scattering wave function in the internal region and to remove all single particle resonances from the continuum. In the application of the method to the quantitative analysis of the 28Si(n,γ) and 32S(n, γ) reaction both the trend and magnitude of the cross sections are reproduced very satisfactorily. The calculation also predicts the existence of doorway states embedded on the giant dipole and contributing significantly to the cross section. These doorway states are indeed consistent with the existence of rapid fluctuations observed in recent (n, γo) and (n, γ1) measurements.
*Supported by the Bundesministerium fur Forschung und Technologie (Federal Rep. of Germany) and the National Research Council (Canada)
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References
B.R. Mottelson, Proceedings of the International Conference on Nuclear Structure, Tokyo (1967); I. Hamomoto, Nucl. Phys. A205 (1973), 205.
J. Raynal, M.A. Melkanov, T. Sawada, Nucl. Phys. A101; M. Micklinghoff, Ph.D. Thesis, Hamburg (1977).
M. Micklinghoff, B. Castel, Z. Phys. A282 (1977), 117.
W.L. Wang, C.M. Shakin, Phys. Lett. 32B (1970), 421. W.L. Wang, C.M. Shakin, Phys. Rev. C5 (1972), 1898.
M. Micklinghoff, Nucl. Phys. A295 (1978), 228.
C.F. Clement, A.M. Lane, J.R. Rook, Nucl. Phys. 26 (1965), 66.
G.E. Brown, Nucl. Phys. 57 (1964), 339.
I.P. Johnstone, B. Castel, Nucl. Phys. A213 (1973), 341; B. Castel, I.P. Johnstone, Can. J. Phys. 51 (1973) 988.
B. Castel, K.W.C. Stewart, M. Harvey, Nucl. Phys. Al62 (1971), 273.
K.W. Schmid, G. Do Dang, Phys. Rev. Cl5(1977), 1515.
A. Lindholm, L. Nilsson, I. Berquist, B. Palsson, Nucl. Phys. A279 (1977), 445.
J. Nilsson, A. Lindholm, I. Bergquist and N. Olsson, Contribution 57, Third International Sympos. on Neutron Capture Gamma-Ray Spectroscopy and Related Topics, Brookhaven Nat. Lab. Sept. 1978.
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© 1979 Plenum Press, New York
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Castel, B., Micklinghoff, M. (1979). Doorway Structures in the Radiative Capture of Fast Neutrons. In: Chrien, R.E., Kane, W.R. (eds) Neutron Capture Gamma-Ray Spectroscopy. Springer, Boston, MA. https://doi.org/10.1007/978-1-4613-2940-4_15
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DOI: https://doi.org/10.1007/978-1-4613-2940-4_15
Publisher Name: Springer, Boston, MA
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