ar X iv : n uc l - ex / 9 70 70 04 v 1 1 4 Ju l 1 99 7 Evidence of Double Phonon Excitations in 16 O + 208 Pb Reaction

ar X iv : n uc l - ex / 9 70 70 05 v 1 2 2 Ju l 1 99 7 1 Barrier Distributions as a Tool to Investigate Fusion and Fission

The recent availability of precisely measured fusion cross-sections has enabled the extraction of a representation of the distribution of barriers encountered during fusion. These representations, obtained from a variety of reactions, provide a direct observation of how the structure of the fusing nuclei changes the inter–nuclear potential landscape, thus affecting the fusion probability. Recen...

ar X iv : n uc l - ex / 9 90 70 03 v 1 6 J ul 1 99 9 Coupled - channels analysis of the 16 O + 208 Pb fusion barrier distribution

Analyses using simplified coupled-channels models have been unable to describe the shape of the previously measured fusion barrier distribution for the doubly magic O+Pb system. This problem was investigated by remeasuring the fission excitation function for O+Pb with improved accuracy and performing more exact coupled-channels calculations, avoiding the constant-coupling and first-order coupli...

ar X iv : n uc l - th / 9 60 60 04 v 1 4 J un 1 99 6 Quenching of 1 + excitations in the double giant resonance

The electromagnetic excitation of the two-phonon isovector giant dipole resonance in relativistic projectiles incident on heavy targets can be proceed via several intermediate 1 − one-phonon giant resonance states. In two step electric dipole transitions the population of 0 + , 1 + , and 2 + two-phonon states are possible. We calculate the amplitude distribution of 1 − excitations with an RPA f...

ar X iv : n uc l - th / 9 90 70 52 v 1 1 4 Ju l 1 99 9 K − and p̄ deeply bound atomic states

ar X iv : n uc l - ex / 9 90 70 05 v 1 1 3 Ju l 1 99 9 Directed and Elliptic Flow in 158 A GeV Pb + Pb Collisions

Directed and elliptic flow of protons and positively charged pions has been studied in the target fragmentation region using the Plastic Ball detector in the WA98 experiment. The results exhibit a strong dependence on centrality, rapidity, and transverse momentum. The rapidity dependence can be described by a Gaussian distribution. The model comparisons reveal a large discrepancy of the flow st...