@inproceedings{oai:jaxa.repo.nii.ac.jp:00004985, author = {水野, 恒史 and Tsunefumi, Mizuno and Fermi-LAT, Collaboration}, book = {宇宙航空研究開発機構特別資料:, JAXA Special Publication: The Energetic Cosmos; from Suzaku to ASTRO-H}, month = {Feb}, note = {The 3rd Suzaku international Conference "Energetic Cosmos : from Suzaku to ASTRO-H" (June 29-July 2, 2009. Grand Park Otaru Hotel), Otaru, Hokkaido Japan, The diffuse gamma-ray emission is produced through the interaction of cosmic-rays (CRs) with the interstellar medium and the interstellar radiation field, and thus can be used as an indirect probe to study the CR spectral and spatial distribution in distant locations. Here we report the observations of diffuse gamma-rays in two intermediate Galactic latitude regions by the Large Area Telescope (LAT) on the Fermi mission. The LAT spectrum in a mid/low-latitude region (Galactic latitudes absolute value of b from 10 deg to 20 deg) does not confirm a so-called EGRET GeV-excess. The gamma-ray spectrum in a mid/high-latitude region in the third quadrant (Galactic longitude l from 200 deg to 260 deg and 22 deg is less than or equal to absolute value of b is less than or equal to 60 deg) agrees with the model based on directly measured CR spectra. These results indicate that CR nuclei spectra in the vicinity of the solar system are close to the local interstellar spectra, providing a solid basis for further studies of diffuse gamma-rays and the CR distribution in our Galaxy., Meeting sponsors: The University of Tokyo, The Institute of Physical and Chemical Research, The Japan Society for the Promotion of Science, 資料番号: AA0064574053, レポート番号: JAXA-SP-09-008E}, pages = {142--145}, publisher = {宇宙航空研究開発機構, Japan Aerospace Exploration Agency (JAXA)}, title = {Fermi LAT Study of Galactic Cosmic-Rays by Observing Diffuse gamma-Rays from Mid-Latitude Regions}, volume = {JAXA-SP-09-008E}, year = {2010} }