Elsevier

Nuclear Physics A

Volume 204, Issue 1, 2 April 1973, Pages 53-64
Nuclear Physics A

An experimental study of the 9Be(p, π+)10Be and 9Be(p, π)10C reactions at 185 MeV

https://doi.org/10.1016/0375-9474(73)90005-5Get rights and content

Abstract

A magnetic spectrometer was used for the momentum analysis of pions produced by 185 MeV protons on a 9Be target. The obtained energy resolution (0.55 MeV FWHM) made it possible to resolve a number of discrete final states in 10Be and 10C. Energy spectra were measured in the angular region 15°–130° (lab). Angular distributions for six peaks in 10Be and four peaks in 10C are presented in tables and graphs. A peak corresponding to a not previously reported level in 10Be was observed at 11.75 ±0.11 MeV excitation energy. The measured π+π ratio for the ground state analogues was found to be angular dependent and varied from 30 at 35° (lab) to 2 at 125° (lab). The results are compared with theoretical predictions and discussed in terms of one- and two-nucleon models.

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