Nuclear forward glory, sigma(R) and f(N) (0 degrees) in the scattering of He-6 by carbon

Using the generalized optical theorem for charged particles, the total reaction cross section sigma(R) and the nuclear scattering amplitude f(N) at 0 degrees have been determined model independently for the first time in the He-6+C-12 system. A large fraction of sigma(R), is accounted for by f(N)(0 degrees) -a manifestation of the nuclear forward glory effect. A comparison with the Li-6+C-12 system supports the prediction that the high break-up probability of He-6 reduces the fraction of the total reaction cross section accounted for by the nuclear scattering amplitude at 0 degrees. [S0556-2813(99)03011-3]

Collective stories and well-being: Using a dialogical narrative approach to understand peer relationships among combat veterans experiencing post-traumatic stress disorder

Using a dialogical narrative approach, this original research explored how combat veterans experiencing post-traumatic stress disorder made sense of peer relationships with other veterans and what effects these relationships had on their well-being. Interviews and participant observations were conducted with 15 male combat veterans (aged 27–60 years) and one member of the civilian emergency services, the majority of whom were diagnosed with post-traumatic stress disorder following traumatic exposure in a range of armed conflicts. All participants were part of a surfing charity for veterans experiencing post-traumatic stress disorder. Data were rigorously analysed using a dialogical narrative analysis (DNA). Findings revealed the collective story that veterans used to make sense of peer relationships within the group. This collective story worked for the veterans to shape their experiences of well-being by fostering camaraderie, stimulating deeper connections and countering the negative effects of post-traumatic stress disorder. Potential therapeutic effects of the collective story were also identified. This article extends previous knowledge on combat veterans and social relationships and advances the field of narrative health psychology through the empirical application of a sophisticated dialogical narrative approach

Borromean nucleus reactions induced below the breakup threshold: He-6+p

For the first time Borromean nucleus induced reactions have been measured below the three-body breakup threshold. A set of angular distributions for the single and two neutron transfer as well as on the charge exchange reaction channel has been obtained. The experimental data have sufficient angular coverage and precision to allow for the discrimination between different model predictions, which do not suffer from ambiguities introduced to the interpretation of experimental data due to flux losses into the three-body breakup channel. The viability of the idea is demonstrated in the case of nuclear reactions induced by the simplest Borromean nucleus, i.e., He-6, on a structureless target, i.e., protons. Comparison with different theoretical approaches suggest that coupled channel effects play an important role. A decrease of the model wave function's rms radius of 0.15 fm alters the predicted angular distributions such that they no longer follow the experimental results

First results with the recoil separator ARES

We present here the first results obtained with the new recoil separator ARES. ARES is used for the measurement of (p,gamma) and (alpha,gamma) reactions at astrophysical energies in inverse kinematic using both stable and radioactive beams