TY - JOUR
T1 - Pion nucleus reactions
AU - Ashery, Daniel
N1 - Funding Information:
Pions and their interaction with nuclei has become recently a subject which crosses the boundaries between the various areas of interest in nuclear nhvsics. Since it is particularly important to stress this point in this conference, I will begin by brinqinq a few examples: (a) Relativistic heavy ions collisions. These processes were intensivelv studied in recent years with the hope to observe new nhenomena such as hiqh density nuclear matter, shock waves, hot spots, etc. The observation of nions nro-duced in these collisions is one of the most imnortant siqnatures throunh which these phenomena are expected to be identifiedI-3). Clearlv, the internretation of the observed pion yield cannot be done without understandins how the nions interact with the nucleus where they are produced. (b) Pion photoproduction and electroproduction. These reactions attract increasing interest as powerful tools for studies of fundamental interactions and nuclear structure4-6~. Pions are produced over the whole nuclear volume throuqh an understandable reaction mechanism. These nions have to emerqe from the interior of the nucleus and, while doing so, they interact--for instance, they miqht be reabsorbed by the nucleus. Most experiments in this field were limited to light nuclei near threshold and this problem will become more comnlicated when heavier systems and higher energies are studied. The interpretation of the results and understanding these reactions will require knowledge about the pion nucleus interaction. (c) Nuclear structure studies through pion induced reactions. The snecial features of the pion as a nuclear probe, mainly its isospin sensitivity and availability of reaction channels not accessible by other probes--such as double charqe exchange and pion absorption--present us with a tool to study new nuclear properties Examples w e discussed by Dr. Petrovich7), presented as this.conferenceB-rs )and reviewed by several authors a year ago I~,~~~~~~~~~"~~u~~es of nuclear states properties. Other studies exploited the pions for neutron radii and matter distribution measurementsI5), For complete internretation of t Work supported in part by the Israeli Commission Swiss Institute for-Nuclear Research.
PY - 1981/2/23
Y1 - 1981/2/23
N2 - The importance of understanding pion nucleus reactions for various fields in nuclear physics is discussed. Specific examples are brought from the areas of relativistic heavy ions, electro- and photo-nuclear reactions and nuclear matter. The status of experimental information about pion nucleus reactions is reviewed. Data on the magnitude of reaction cross sections for the major channels and the systematics of their dependence on various parameters is presented. The question of reaction mechanism is discussed in more details for the inclusive inelastic scattering and true pion absorption. Experiments pertaining to reaction mechanism are reviewed and the question of their sensitivity to the primary interaction process is addressed, Theoretical interpretations of experimental results are presented and different approaches are confronted.
AB - The importance of understanding pion nucleus reactions for various fields in nuclear physics is discussed. Specific examples are brought from the areas of relativistic heavy ions, electro- and photo-nuclear reactions and nuclear matter. The status of experimental information about pion nucleus reactions is reviewed. Data on the magnitude of reaction cross sections for the major channels and the systematics of their dependence on various parameters is presented. The question of reaction mechanism is discussed in more details for the inclusive inelastic scattering and true pion absorption. Experiments pertaining to reaction mechanism are reviewed and the question of their sensitivity to the primary interaction process is addressed, Theoretical interpretations of experimental results are presented and different approaches are confronted.
UR - http://www.scopus.com/inward/record.url?scp=49149137529&partnerID=8YFLogxK
U2 - 10.1016/0375-9474(81)90615-1
DO - 10.1016/0375-9474(81)90615-1
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AN - SCOPUS:49149137529
SN - 0375-9474
VL - 354
SP - 555
EP - 576
JO - Nuclear Physics A
JF - Nuclear Physics A
IS - 1-2
ER -