### Abstract

Single and double [Formula Presented]-shell excitation of Li by 10.6-MeV/nucleon [Formula Presented] projectiles is investigated by measuring Li autoionization spectra in the energy range from 50 to 90 eV. The ratio for double [Formula Presented]-shell excitation to single [Formula Presented]-shell excitation is determined to be about 0.36%. The measured ratio for double-to-single [Formula Presented]-shell excitation of Li is about a factor of 2 larger than calculations based on independent interactions between the projectile nucleus and each of the Li target electrons, indicating that the electron-electron interaction plays a dominant role in the double [Formula Presented]-shell excitation of Li in these collisions.

Original language | English |
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Pages (from-to) | R3154-R3157 |

Journal | Physical Review A - Atomic, Molecular, and Optical Physics |

Volume | 57 |

Issue number | 5 |

DOIs | |

Publication status | Published - Jan 1 1998 |

### ASJC Scopus subject areas

- Atomic and Molecular Physics, and Optics

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## Cite this

*Physical Review A - Atomic, Molecular, and Optical Physics*,

*57*(5), R3154-R3157. https://doi.org/10.1103/PhysRevA.57.R3154