Departures from the Hauser-Feshbach theory due to the level-level correlations in deformed nuclei
作者： Alpar Sevgen
DOI: 10.1016/0375-9474(74)90040-2
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摘要: Abstract A microscopic dynamical model is used for the inelastic scattering of nucleons by deformed nuclei and fluctuation cross sections are calculated. The case weak absorption in all channels considered so that number statistical assumptions minimized. results compared with Hauser-Feshbach expressions as regards magnitude structure. partial width amplitudes calculated from correlated, simplest type level-level correlations being due to similar-channels effect (SCE). When SCE alone, following two obtained, (i) increased over estimates, Γ ⪡ D ⪢ , a factor κ if entrance exit similar. numerical value found be 3 special general it conjectured lie between limits 1 3, (ii) σ cc ′ f ″ exhibit correlated fluctuations c cases “SCE+direct channel-channel coupling” “SCE+intermediate structure” also investigated. In studied direct reaction do not vanish channelwise factorization assumption theory fails.
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J.P. Jeukenne, C. Mahaux, A. Lejeune, F. Calogero, Microscopic approaches to the optical-model potential Editrice Compositori, Bologna. ,(1973)
C. Mahaux, Departures from the Statistical Model Springer, Boston, MA. pp. 197- 233 ,(1974) , 10.1007/978-1-4613-4499-5_8
R. Wagner, P. D. Miller, T. Tamura, H. Marshak, INTERACTION OF 350-kev POLARIZED NEUTRONS WITH ORIENTED $sup 165$Ho NUCLEI Physical Review. ,vol. 139, pp. 29- 46 ,(1965) , 10.1103/PHYSREV.139.B29
A. Richter, E. Grosse, J. Hüfner, H.A. Weidenmüller, J.W. Tepel, Anomalies in the 89Y (α, n)92Nb cross section near isobaric analogue resonances Physics Letters B. ,vol. 38, pp. 349- 353 ,(1972) , 10.1016/0370-2693(72)90154-2
J. Hüfner, A. Sevgen, Decay of a prepared state treated as a doorway phenomenon Nuclear Physics A. ,vol. 218, pp. 239- 248 ,(1974) , 10.1016/0375-9474(74)90002-5
Walter Hauser, Herman Feshbach, The Inelastic Scattering of Neutrons Physical Review. ,vol. 87, pp. 366- 373 ,(1952) , 10.1103/PHYSREV.87.366
Alpar Sevgen, Structure of the deformed terms of the rotational-model optical potential (II) Nuclear Physics A. ,vol. 216, pp. 429- 456 ,(1973) , 10.1016/0375-9474(73)90163-2
G.R. Satchler, Average compound nucleus cross sections in the continuum Physics Letters. ,vol. 7, pp. 55- 56 ,(1963) , 10.1016/0031-9163(63)90440-2
Mitsuji Kawai, A.K Kerman, K.W McVoy, Modification of Hauser--Feshbach calculations by direct-reaction channel coupling. Annals of Physics. ,vol. 75, pp. 156- 170 ,(1973) , 10.1016/0003-4916(73)90465-X
Z. Vager, A time reversal invariant formulation of average compound cross-sections Physics Letters B. ,vol. 36, pp. 269- 270 ,(1971) , 10.1016/0370-2693(71)90699-X