ISSN:
1434-601X
Keywords:
24.10.Cn
;
24.30.He
;
25.40.Ep
;
25.55.Ci
Source:
Springer Online Journal Archives 1860-2000
Topics:
Physics
Notes:
Abstract The surface response for charge exchange (p, n) and (3He, T) reactions is studied in theΔ-region using the semi-infinite slab model. The contribution to the total response from different decay channels, (NN, Nπ, π), is calculated. These decay channels corresponds to the exclusive channels, (pp, pπ +, π+), measured in recent (p, n) and (3He, T) experiments. The in-medium properties of theΔ-resonance is taken into account by using microscopic calculations of theΔ-width in nuclear matter. From theΔ-width in nuclear matter a non-local imaginaryΔ-potential, as well as a local potential, is constructed for the semi-infinite slab model. The results in the semi-infinite slab model gives a qualitative understanding of the exclusive experiments. The exclusive (NN, Nπ, π) channels are more sensitive, than the total response, tog′-correlation parameters,Δ-width and the absorption function used at the external vertex. Our calculations suggest low values of theg′-correlation parametersg′ NΔ andg′ ΔΔ, (∼0.3). The results with theΔ-width represented as a non-local or a localΔ-potential are very similar, with only minor differences in the exclusive channels.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF01289588
Permalink
