## Abstract

Pion absorption in He3 was studied at T=62.5 and 82.8 MeV using nucleon-nucleon coincidences. For + absorption on proton-neutron pairs the differential cross section is the same as that for ++d p+p except for an increase by a factor of about 1.5. For - absorption on the proton-proton pair, the differential cross section is asymmetric about 90°, indicating possible isospin mixing. The total cross sections pn(+) are 10.2 0.9 mb and 13.5 1.3 mb at 62.5 and 82.8 MeV and for pp(-) are 0.70 0.07 mb and 0.92 0.10 mb at 62.5 and 82.8 MeV. The three-body absorption cross sections for + and - are found to be comparable to each other and show no strong energy dependence. The three-body absorption cross section 3(+) is 6.7 2.5 mb and 5.7 2.3 mb and for -, 3(-) is 8.7 1.4 mb and 6.5 2.0 mb at 62.5 and 82.8 MeV, respectively.

Original language | English |
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Pages (from-to) | 1714-1726 |

Number of pages | 13 |

Journal | Physical Review C - Nuclear Physics |

Volume | 33 |

Issue number | 5 |

DOIs | |

State | Published - 1986 |