736 research outputs found
Importance of the deuteron breakup in the deuteron knockout reaction
An isoscalar pair is expected to emerge in nuclei that have similar
proton and neutron numbers and it may be a candidate for a deuteron
``cluster.'' There is, however, no experimental evidence for it. The purpose of
this paper is to construct a new reaction model for the () reaction
including the deuteron breakup in the elementary process and the deuteron
reformation by the final-state interactions (FSIs). How these processes
contribute to the observables of the reaction is investigated. The distorted
wave impulse approximation is extended in twofold. The elementary processes of
the (), i.e., the - elastic scattering and reaction, are
described with an impulse picture employing a nucleon-nucleon effective
interaction. The three-body scattering waves in the final state of the ()
reaction are calculated with the continuum-discretized coupled-channels method.
The triple differential cross section (TDX) of the () reaction is
calculated with the new model. The elementary processes are described
reasonably well with the present model. As for the () reaction, the
deuteron reformation can either increase or decrease the TDX height depending
on the interference between the elastic and breakup channel of deuteron, while
the \textit{back-coupling} effect always decreases it. It is shown that the
deuteron reformation significantly changes the TDX of the () reaction
through the interference. It is important to include this process to
quantitatively discuss the () cross sections in view of the deuteron
formation in nuclei. For more quantitative discussion regarding the
experimental data, further improvement will be necessary.Comment: 11 pages, 5 figure
Father-child bonding among Japanese fathers of infants: A municipal-based study at the time of the 4-month child health checkup
博士(医学)福島県立医科大
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