On Some Specific Features of the p̄ Interaction with 9Be
The prospect of starting a new generation of experiments with p at LEAR stimulates interest in studies of p̄ interactions with nuclei. A rather intriguing question arises here: Is the real part of the p̄A potential much larger than for pA interactions? (and does it make sense to talk in terms of a p̄A potential in view of the very-strong annihilation?). If the answer is Yes, then one can expect that a p̄ is strongly accelerated at the Nuclear surface before it annihilates on a single nucleon, and as a result of momentum conservation the residual nucleus (A-1) formed at p̄ annihilation might have an anomalously high velocity. Of course one has to bear in mind that final-state interaction (fsi) of p̄ annihilation debris (π,K) will normally affect the energy spectra of recoiling nuclei. What we want to speak about in this paper is how to “filter” out experimentally events where a residual nucleus has not undergone fsi with annihilation debris. A good candidate for this is 8Be.
KeywordsPlanar Channelling Residual Nucleus Recoil Energy Nuclear Surface Single Nucleon
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