Entrance- and Exit-Channel Effects and the Suppression of Neutron Emission from <math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mrow><mmultiscripts><mrow><mi mathvariant="normal">Ni</mi></mrow><mprescripts></mprescripts><mrow></mrow><mrow><mn>64</mn></mrow><mrow></mrow><mrow></mrow></mmultiscripts></mrow></math> + <math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mrow><mmultiscripts><mrow><mi mathvariant="normal">Zr</mi></mrow><mprescripts></mprescripts><mrow></mrow><mrow><mn>92</mn></mrow><mrow></mrow><mrow></mrow></mmultiscripts></mrow></math> → <math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mrow><mmultiscripts><mrow><mi mathvariant="normal">E</mi><mi mathvariant="normal">r</mi><mo>*</mo></mrow><mprescripts></mprescripts><mrow></mrow><mrow><mn>156</mn></mrow><mrow></mrow><mrow></mrow></mmultiscripts></mrow></math>

D. J. G. Love; P. J. Bishop; A. Kirwan; P. J. Nolan; D. J. Thornley; A. H. Nelson; P. J. Twin

doi:10.1103/PhysRevLett.57.551

Entrance- and Exit-Channel Effects and the Suppression of Neutron Emission from ${}^{64}{Ni}$ + ${}^{92}{Zr}$ → ${}^{156}{E r *}$

D. J. G. Love, P. J. Bishop, A. Kirwan, P. J. Nolan, D. J. Thornley, A. H. Nelson, and P. J. Twin

Phys. Rev. Lett. 57, 551 – Published 4 August 1986

Abstract

High-angular-momentum components have been found in the cross section for ${}^{64}{Ni}$ + ${}^{92}{Zr}$ → ${}^{156}{E r *}$ by $γ$ -ray spectroscopy. They are expected to influence the known low evaporation-neutron multiplicity. The feeding pattern rules out significant trapping in superdeformed states at low spin, an explanation previously advanced. Simple coupled-channels calculations are consistent with the observations. The statistical model with high- $l$ fusion enhanced consistently with observation reproduces the neutron multiplicity satisfactorily.