Immunològic i immunitari: un esforç il·lògic? [pòster]

Pòster presentat al I Congrés Internacional de Neologia de les Llengües Romàniques (CINEO 2008).

Immunològic i immunitari: un esforç il·lògic? [edició preliminar]

Edició preliminar de l’article publicat en les actes del I Congrés Internacional de Neologia de les Llengües Romàniques (CINEO 2008).

La pintura del segle XVIII... El debat entre els antics i els moderns

Materials didàctics del grup d'investigació Observatori sobre la Didàctica de les Arts (ODAS)

Two and three nucleon induced photon absorption

We have investigated the mechanisms leading to two and three body photon absorption in nuclei. At photon energies around the pion production threshold we obtain a fraction of three body absorption of less than 10% of the total, contradicting previous theoretical claims that it dominates the absorption process. The strength of the three body channel grows smoothly with the photon energy reaching a maximum of about 60% of the total direct absorption at energies of the photon around 400 MeV.

Nonmesonic weak decay of the hypertriton

The nonmesonic decay of the hypertriton is calculated based on a hypertriton wave function and 3N scattering states, which are rigorous solutions of three-body Faddeev equations using realistic NN and hyperon-nucleon interactions. The pion exchange together with heavier meson exchanges for the ¿N¿NN transition is considered. The total nonmesonic decay rate is found to be 0.5% of the free ¿ decay rate. Integrated as well as differential decay rates are given. The p- and n-induced decays are discussed thoroughly and it is shown that the corresponding total rates cannot be measured individually.