Nuclear and Coulomb breakup of <f>8</f>B

One-proton removal reactions of 936 MeV<f>/</f>u <f>8B</f> have been studied with carbon and lead as breakup targets. Using the FRS at GSI, the longitudinal momentum distributions of the <f>7Be</f> fragments and the one-proton removal cross section of <f>8B</f> were measured. The relative contributions of the breakup channels leading to <f>7Be</f> in its ground state and excited state at 429 keV (<f>7Be&ast;</f>) have been determined from measurements of <f>γ</f> rays in coincidence with the fragments from the one-proton removal reaction. The experimental breakup data are discussed in the context of a theoretical (<f>α+3He+p</f>) three-body model. The combined data from the two targets allow a determination of the weight of the <f>7Be&ast;</f> component in the <f>8B</f> ground state wave function as (<f>13.3±2.2</f>%) [Copyright &y& Elsevier]