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Measurement of high momentum transfer reactions by recoil detection |
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| Authors: | J. Homolka W. Schott W. Wagner W. Wilhelm R.D. Bent M. Fatyga R.E. Pollock M. Saber R.E. Segel P. Kienle K.E. Rehm |
| Affiliation: | aPhysik-Department, Technische Universität München, Munich, FRG bIndiana University, Cyclotron Facility, Bloomington, IN 47405, USA cNorthwestern University, Evanston, IL 60201, USA dGesellschaft für Schwerionenforschung, Darmstadt, FRG ePhysics Division, Argonne National Laboratory, Argonne, IL 60439-4843, USA |
| Abstract: | A method is described for studying reactions at medium energies by measuring the magnetic rigidity, time of flight, and energy loss of the resulting recoil products. The method works best for reactions with two-body final states where one of the outgoing particles is relatively light. A magnetic spectrometer with a special focal plane detector has been used. The detector consists of two position sensitive parallel plate avalanche counters and two proportional counters. Differential cross sections for the 12C(p, π+13C reaction at recoil angles which correspond to the pion being emitted at a backward angle in the center of mass have been measured at bombarding energies of 166 and 186 MeV. Data were also obtained for previously unobserved 12C(p, π0)13N reaction. Several advantages of the method are discussed. |
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