{
    "id": 10567,
    "url": "https://svs.gsfc.nasa.gov/10567/",
    "page_type": "Produced Video",
    "title": "How Cosmic-ray Protons Make Gamma rays",
    "description": "In the simplest and most common interaction, a cosmic-ray proton strikes another proton. The protons survive the collision, but their interaction creates an unstable particle — a pion — with only 14 percent the mass of a proton. In 10 millionths of a billionth of a second, the pion decays into a pair of gamma-ray photons. More complex scenarios occur when cosmic-ray protons strike nuclei containing greater numbers of particles. || ",
    "release_date": "2010-02-13T00:00:00-05:00",
    "update_date": "2023-05-03T13:54:22.407990-04:00",
    "main_image": {
        "id": 494226,
        "url": "https://svs.gsfc.nasa.gov/vis/a010000/a010500/a010567/Pion_Simple_Still_1280x720.jpg",
        "filename": "Pion_Simple_Still_1280x720.jpg",
        "media_type": "Image",
        "alt_text": "Simple animation of proton-proton interaction resulting in netural pion that decays into two gamma rays.",
        "width": 1280,
        "height": 720,
        "pixels": 921600
    },
    "main_video": {
        "id": 494214,
        "url": "https://svs.gsfc.nasa.gov/vis/a010000/a010500/a010567/10567_Simple_Pion_H264_960x720_29.97fps.webmhd.webm",
        "filename": "10567_Simple_Pion_H264_960x720_29.97fps.webmhd.webm",
        "media_type": "Movie",
        "alt_text": "Simple animation of proton-proton interaction resulting in netural pion that decays into two gamma rays.",
        "width": 960,
        "height": 540,
        "pixels": 518400
    },
    "progress": "Complete",
    "media_groups": [
        {
            "id": 353716,
            "url": "https://svs.gsfc.nasa.gov/10567/#media_group_353716",
            "widget": "Basic text with HTML",
            "title": "",
            "caption": "",
            "description": "In the simplest and most common interaction, a cosmic-ray proton strikes another proton. The protons survive the collision, but their interaction creates an unstable particle — a pion — with only 14 percent the mass of a proton. In 10 millionths of a billionth of a second, the pion decays into a pair of gamma-ray photons. More complex scenarios occur when cosmic-ray protons strike nuclei containing greater numbers of particles.",
            "items": [],
            "extra_data": {}
        },
        {
            "id": 353717,
            "url": "https://svs.gsfc.nasa.gov/10567/#media_group_353717",
            "widget": "Video player",
            "title": "",
            "caption": "",
            "description": "Simple animation of proton-proton interaction resulting in netural pion that decays into two gamma rays.",
            "items": [
                {
                    "id": 338809,
                    "type": "media",
                    "extra_data": null,
                    "title": null,
                    "caption": null,
                    "instance": {
                        "id": 494226,
                        "url": "https://svs.gsfc.nasa.gov/vis/a010000/a010500/a010567/Pion_Simple_Still_1280x720.jpg",
                        "filename": "Pion_Simple_Still_1280x720.jpg",
                        "media_type": "Image",
                        "alt_text": "Simple animation of proton-proton interaction resulting in netural pion that decays into two gamma rays.",
                        "width": 1280,
                        "height": 720,
                        "pixels": 921600
                    }
                },
                {
                    "id": 338807,
                    "type": "media",
                    "extra_data": null,
                    "title": null,
                    "caption": null,
                    "instance": {
                        "id": 494224,
                        "url": "https://svs.gsfc.nasa.gov/vis/a010000/a010500/a010567/Pion_Simple_Still_1280x720_web.png",
                        "filename": "Pion_Simple_Still_1280x720_web.png",
                        "media_type": "Image",
                        "alt_text": "Simple animation of proton-proton interaction resulting in netural pion that decays into two gamma rays.",
                        "width": 320,
                        "height": 180,
                        "pixels": 57600
                    }
                },
                {
                    "id": 338808,
                    "type": "media",
                    "extra_data": null,
                    "title": null,
                    "caption": null,
                    "instance": {
                        "id": 494225,
                        "url": "https://svs.gsfc.nasa.gov/vis/a010000/a010500/a010567/Pion_Simple_Still_1280x720_thm.png",
                        "filename": "Pion_Simple_Still_1280x720_thm.png",
                        "media_type": "Image",
                        "alt_text": "Simple animation of proton-proton interaction resulting in netural pion that decays into two gamma rays.",
                        "width": 80,
                        "height": 40,
                        "pixels": 3200
                    }
                },
                {
                    "id": 338797,
                    "type": "media",
                    "extra_data": null,
                    "title": null,
                    "caption": null,
                    "instance": {
                        "id": 494214,
                        "url": "https://svs.gsfc.nasa.gov/vis/a010000/a010500/a010567/10567_Simple_Pion_H264_960x720_29.97fps.webmhd.webm",
                        "filename": "10567_Simple_Pion_H264_960x720_29.97fps.webmhd.webm",
                        "media_type": "Movie",
                        "alt_text": "Simple animation of proton-proton interaction resulting in netural pion that decays into two gamma rays.",
                        "width": 960,
                        "height": 540,
                        "pixels": 518400
                    }
                },
                {
                    "id": 338798,
                    "type": "media",
                    "extra_data": null,
                    "title": null,
                    "caption": null,
                    "instance": {
                        "id": 494215,
                        "url": "https://svs.gsfc.nasa.gov/vis/a010000/a010500/a010567/10567_Simple_Pion_ProRes_1280x720_59.94fps.mov",
                        "filename": "10567_Simple_Pion_ProRes_1280x720_59.94fps.mov",
                        "media_type": "Movie",
                        "alt_text": "Simple animation of proton-proton interaction resulting in netural pion that decays into two gamma rays.",
                        "width": 1280,
                        "height": 720,
                        "pixels": 921600
                    }
                },
                {
                    "id": 338799,
                    "type": "media",
                    "extra_data": null,
                    "title": null,
                    "caption": null,
                    "instance": {
                        "id": 494216,
                        "url": "https://svs.gsfc.nasa.gov/vis/a010000/a010500/a010567/10567_Simple_Pion_H264_1280x720_30fps.mov",
                        "filename": "10567_Simple_Pion_H264_1280x720_30fps.mov",
                        "media_type": "Movie",
                        "alt_text": "Simple animation of proton-proton interaction resulting in netural pion that decays into two gamma rays.",
                        "width": 1280,
                        "height": 720,
                        "pixels": 921600
                    }
                },
                {
                    "id": 338800,
                    "type": "media",
                    "extra_data": null,
                    "title": null,
                    "caption": null,
                    "instance": {
                        "id": 494217,
                        "url": "https://svs.gsfc.nasa.gov/vis/a010000/a010500/a010567/10567_Simple_Pion_H264_1280x720_59.94fps.mov",
                        "filename": "10567_Simple_Pion_H264_1280x720_59.94fps.mov",
                        "media_type": "Movie",
                        "alt_text": "Simple animation of proton-proton interaction resulting in netural pion that decays into two gamma rays.",
                        "width": 1280,
                        "height": 720,
                        "pixels": 921600
                    }
                },
                {
                    "id": 338801,
                    "type": "media",
                    "extra_data": null,
                    "title": null,
                    "caption": null,
                    "instance": {
                        "id": 494218,
                        "url": "https://svs.gsfc.nasa.gov/vis/a010000/a010500/a010567/10567_Simple_Pion_M4V_1280x720_29.97fps.m4v",
                        "filename": "10567_Simple_Pion_M4V_1280x720_29.97fps.m4v",
                        "media_type": "Movie",
                        "alt_text": "Simple animation of proton-proton interaction resulting in netural pion that decays into two gamma rays.",
                        "width": 1280,
                        "height": 720,
                        "pixels": 921600
                    }
                },
                {
                    "id": 338802,
                    "type": "media",
                    "extra_data": null,
                    "title": null,
                    "caption": null,
                    "instance": {
                        "id": 494219,
                        "url": "https://svs.gsfc.nasa.gov/vis/a010000/a010500/a010567/10567_Simple_Pion_H264_960x720_29.97fps.m4v",
                        "filename": "10567_Simple_Pion_H264_960x720_29.97fps.m4v",
                        "media_type": "Movie",
                        "alt_text": "Simple animation of proton-proton interaction resulting in netural pion that decays into two gamma rays.",
                        "width": 960,
                        "height": 720,
                        "pixels": 691200
                    }
                },
                {
                    "id": 338806,
                    "type": "media",
                    "extra_data": null,
                    "title": null,
                    "caption": null,
                    "instance": {
                        "id": 494223,
                        "url": "https://svs.gsfc.nasa.gov/vis/a010000/a010500/a010567/Pion_Simple_Still_1280x720.tif",
                        "filename": "Pion_Simple_Still_1280x720.tif",
                        "media_type": "Image",
                        "alt_text": "Simple animation of proton-proton interaction resulting in netural pion that decays into two gamma rays.",
                        "width": 1280,
                        "height": 720,
                        "pixels": 921600
                    }
                },
                {
                    "id": 338803,
                    "type": "media",
                    "extra_data": null,
                    "title": null,
                    "caption": null,
                    "instance": {
                        "id": 494220,
                        "url": "https://svs.gsfc.nasa.gov/vis/a010000/a010500/a010567/10567_Simple_Pion_H264_640x480_29.97fps.m4v",
                        "filename": "10567_Simple_Pion_H264_640x480_29.97fps.m4v",
                        "media_type": "Movie",
                        "alt_text": "Simple animation of proton-proton interaction resulting in netural pion that decays into two gamma rays.",
                        "width": 640,
                        "height": 360,
                        "pixels": 230400
                    }
                },
                {
                    "id": 338804,
                    "type": "media",
                    "extra_data": null,
                    "title": null,
                    "caption": null,
                    "instance": {
                        "id": 494221,
                        "url": "https://svs.gsfc.nasa.gov/vis/a010000/a010500/a010567/10567_Simple_Pion_H264_320x240_29.97.m4v",
                        "filename": "10567_Simple_Pion_H264_320x240_29.97.m4v",
                        "media_type": "Movie",
                        "alt_text": "Simple animation of proton-proton interaction resulting in netural pion that decays into two gamma rays.",
                        "width": 320,
                        "height": 180,
                        "pixels": 57600
                    }
                },
                {
                    "id": 338805,
                    "type": "media",
                    "extra_data": null,
                    "title": null,
                    "caption": null,
                    "instance": {
                        "id": 494222,
                        "url": "https://svs.gsfc.nasa.gov/vis/a010000/a010500/a010567/10567_Simple_Pion_MPEG1_352x240_29.97fps.mpg",
                        "filename": "10567_Simple_Pion_MPEG1_352x240_29.97fps.mpg",
                        "media_type": "Movie",
                        "alt_text": "Simple animation of proton-proton interaction resulting in netural pion that decays into two gamma rays.",
                        "width": 352,
                        "height": 240,
                        "pixels": 84480
                    }
                }
            ],
            "extra_data": {}
        },
        {
            "id": 353718,
            "url": "https://svs.gsfc.nasa.gov/10567/#media_group_353718",
            "widget": "Video player",
            "title": "",
            "caption": "",
            "description": "This animation shows a more dynamic view of the pion and gamma ray creation process.",
            "items": [
                {
                    "id": 338824,
                    "type": "media",
                    "extra_data": null,
                    "title": null,
                    "caption": null,
                    "instance": {
                        "id": 494241,
                        "url": "https://svs.gsfc.nasa.gov/vis/a010000/a010500/a010567/10567_Pion_Multi_1280x720.jpg",
                        "filename": "10567_Pion_Multi_1280x720.jpg",
                        "media_type": "Image",
                        "alt_text": "This animation shows a more dynamic view of the pion and gamma ray creation process.",
                        "width": 1280,
                        "height": 720,
                        "pixels": 921600
                    }
                },
                {
                    "id": 338822,
                    "type": "media",
                    "extra_data": null,
                    "title": null,
                    "caption": null,
                    "instance": {
                        "id": 494239,
                        "url": "https://svs.gsfc.nasa.gov/vis/a010000/a010500/a010567/10567_Pion_Multi_1280x720_web.png",
                        "filename": "10567_Pion_Multi_1280x720_web.png",
                        "media_type": "Image",
                        "alt_text": "This animation shows a more dynamic view of the pion and gamma ray creation process.",
                        "width": 320,
                        "height": 180,
                        "pixels": 57600
                    }
                },
                {
                    "id": 338823,
                    "type": "media",
                    "extra_data": null,
                    "title": null,
                    "caption": null,
                    "instance": {
                        "id": 494240,
                        "url": "https://svs.gsfc.nasa.gov/vis/a010000/a010500/a010567/10567_Pion_Multi_1280x720_thm.png",
                        "filename": "10567_Pion_Multi_1280x720_thm.png",
                        "media_type": "Image",
                        "alt_text": "This animation shows a more dynamic view of the pion and gamma ray creation process.",
                        "width": 80,
                        "height": 40,
                        "pixels": 3200
                    }
                },
                {
                    "id": 338810,
                    "type": "media",
                    "extra_data": null,
                    "title": null,
                    "caption": null,
                    "instance": {
                        "id": 494227,
                        "url": "https://svs.gsfc.nasa.gov/vis/a010000/a010500/a010567/10567_Pion_Multi_H264_960x720_29.97fps.webmhd.webm",
                        "filename": "10567_Pion_Multi_H264_960x720_29.97fps.webmhd.webm",
                        "media_type": "Movie",
                        "alt_text": "This animation shows a more dynamic view of the pion and gamma ray creation process.",
                        "width": 960,
                        "height": 540,
                        "pixels": 518400
                    }
                },
                {
                    "id": 338811,
                    "type": "media",
                    "extra_data": null,
                    "title": null,
                    "caption": null,
                    "instance": {
                        "id": 494228,
                        "url": "https://svs.gsfc.nasa.gov/vis/a010000/a010500/a010567/10567_Pion_Multi_ProRes_1280x720_59.94fps.mov",
                        "filename": "10567_Pion_Multi_ProRes_1280x720_59.94fps.mov",
                        "media_type": "Movie",
                        "alt_text": "This animation shows a more dynamic view of the pion and gamma ray creation process.",
                        "width": 1280,
                        "height": 720,
                        "pixels": 921600
                    }
                },
                {
                    "id": 338812,
                    "type": "media",
                    "extra_data": null,
                    "title": null,
                    "caption": null,
                    "instance": {
                        "id": 494229,
                        "url": "https://svs.gsfc.nasa.gov/vis/a010000/a010500/a010567/frames/1280x720_16x9_60p/",
                        "filename": "1280x720_16x9_60p",
                        "media_type": "Frames",
                        "alt_text": "This animation shows a more dynamic view of the pion and gamma ray creation process.",
                        "width": 1280,
                        "height": 720,
                        "pixels": 921600
                    }
                },
                {
                    "id": 338813,
                    "type": "media",
                    "extra_data": null,
                    "title": null,
                    "caption": null,
                    "instance": {
                        "id": 494230,
                        "url": "https://svs.gsfc.nasa.gov/vis/a010000/a010500/a010567/10567_Pion_Multi_MPEG2_1280x720_29.97fps.m2v",
                        "filename": "10567_Pion_Multi_MPEG2_1280x720_29.97fps.m2v",
                        "media_type": "Movie",
                        "alt_text": "This animation shows a more dynamic view of the pion and gamma ray creation process.",
                        "width": 1280,
                        "height": 720,
                        "pixels": 921600
                    }
                },
                {
                    "id": 338814,
                    "type": "media",
                    "extra_data": null,
                    "title": null,
                    "caption": null,
                    "instance": {
                        "id": 494231,
                        "url": "https://svs.gsfc.nasa.gov/vis/a010000/a010500/a010567/10567_Pion_Multi_M4V_1280x720_29.97fps.m4v",
                        "filename": "10567_Pion_Multi_M4V_1280x720_29.97fps.m4v",
                        "media_type": "Movie",
                        "alt_text": "This animation shows a more dynamic view of the pion and gamma ray creation process.",
                        "width": 1280,
                        "height": 720,
                        "pixels": 921600
                    }
                },
                {
                    "id": 338815,
                    "type": "media",
                    "extra_data": null,
                    "title": null,
                    "caption": null,
                    "instance": {
                        "id": 494232,
                        "url": "https://svs.gsfc.nasa.gov/vis/a010000/a010500/a010567/10567_Pion_Multi_H264_1280x720_30fps.mov",
                        "filename": "10567_Pion_Multi_H264_1280x720_30fps.mov",
                        "media_type": "Movie",
                        "alt_text": "This animation shows a more dynamic view of the pion and gamma ray creation process.",
                        "width": 1280,
                        "height": 720,
                        "pixels": 921600
                    }
                },
                {
                    "id": 338816,
                    "type": "media",
                    "extra_data": null,
                    "title": null,
                    "caption": null,
                    "instance": {
                        "id": 494233,
                        "url": "https://svs.gsfc.nasa.gov/vis/a010000/a010500/a010567/10567_Pion_Multi_H264_960x720_29.97fps.m4v",
                        "filename": "10567_Pion_Multi_H264_960x720_29.97fps.m4v",
                        "media_type": "Movie",
                        "alt_text": "This animation shows a more dynamic view of the pion and gamma ray creation process.",
                        "width": 960,
                        "height": 720,
                        "pixels": 691200
                    }
                },
                {
                    "id": 338817,
                    "type": "media",
                    "extra_data": null,
                    "title": null,
                    "caption": null,
                    "instance": {
                        "id": 494234,
                        "url": "https://svs.gsfc.nasa.gov/vis/a010000/a010500/a010567/10567_Pion_Multi_H264_1280x720_59.94fps.mov",
                        "filename": "10567_Pion_Multi_H264_1280x720_59.94fps.mov",
                        "media_type": "Movie",
                        "alt_text": "This animation shows a more dynamic view of the pion and gamma ray creation process.",
                        "width": 1280,
                        "height": 720,
                        "pixels": 921600
                    }
                },
                {
                    "id": 338821,
                    "type": "media",
                    "extra_data": null,
                    "title": null,
                    "caption": null,
                    "instance": {
                        "id": 494238,
                        "url": "https://svs.gsfc.nasa.gov/vis/a010000/a010500/a010567/10567_Pion_Multi_1280x720.tif",
                        "filename": "10567_Pion_Multi_1280x720.tif",
                        "media_type": "Image",
                        "alt_text": "This animation shows a more dynamic view of the pion and gamma ray creation process.",
                        "width": 1280,
                        "height": 720,
                        "pixels": 921600
                    }
                },
                {
                    "id": 338818,
                    "type": "media",
                    "extra_data": null,
                    "title": null,
                    "caption": null,
                    "instance": {
                        "id": 494235,
                        "url": "https://svs.gsfc.nasa.gov/vis/a010000/a010500/a010567/10567_Pion_Multi_H264_640x360_29.97.m4v",
                        "filename": "10567_Pion_Multi_H264_640x360_29.97.m4v",
                        "media_type": "Movie",
                        "alt_text": "This animation shows a more dynamic view of the pion and gamma ray creation process.",
                        "width": 640,
                        "height": 360,
                        "pixels": 230400
                    }
                },
                {
                    "id": 338819,
                    "type": "media",
                    "extra_data": null,
                    "title": null,
                    "caption": null,
                    "instance": {
                        "id": 494236,
                        "url": "https://svs.gsfc.nasa.gov/vis/a010000/a010500/a010567/10567_Pion_Multi_H264_320x180_29.97fps.m4v",
                        "filename": "10567_Pion_Multi_H264_320x180_29.97fps.m4v",
                        "media_type": "Movie",
                        "alt_text": "This animation shows a more dynamic view of the pion and gamma ray creation process.",
                        "width": 320,
                        "height": 180,
                        "pixels": 57600
                    }
                },
                {
                    "id": 338820,
                    "type": "media",
                    "extra_data": null,
                    "title": null,
                    "caption": null,
                    "instance": {
                        "id": 494237,
                        "url": "https://svs.gsfc.nasa.gov/vis/a010000/a010500/a010567/10567_Pion_Multi_MPEG1_352x240_29.97.mpg",
                        "filename": "10567_Pion_Multi_MPEG1_352x240_29.97.mpg",
                        "media_type": "Movie",
                        "alt_text": "This animation shows a more dynamic view of the pion and gamma ray creation process.",
                        "width": 352,
                        "height": 240,
                        "pixels": 84480
                    }
                }
            ],
            "extra_data": {}
        }
    ],
    "studio": "GMS",
    "funding_sources": [
        "NASA Astrophysics"
    ],
    "credits": [
        {
            "role": "Animator",
            "people": [
                {
                    "name": "Scott Wiessinger",
                    "employer": "UMBC"
                }
            ]
        },
        {
            "role": "Producer",
            "people": [
                {
                    "name": "Scott Wiessinger",
                    "employer": "UMBC"
                }
            ]
        },
        {
            "role": "Writer",
            "people": [
                {
                    "name": "Francis Reddy",
                    "employer": "SPSYS"
                }
            ]
        }
    ],
    "missions": [
        "Fermi Gamma-ray Space Telescope"
    ],
    "series": [
        "Astrophysics Animations"
    ],
    "tapes": [],
    "papers": [],
    "datasets": [],
    "nasa_science_categories": [
        "Universe"
    ],
    "keywords": [
        "Ast",
        "Astrophysics",
        "Earth Science",
        "Fermi",
        "Gamma Ray",
        "HDTV",
        "Spectral/Engineering",
        "Supernova",
        "Universe"
    ],
    "recommended_pages": [],
    "related": [],
    "sources": [],
    "products": [],
    "newer_versions": [],
    "older_versions": [],
    "alternate_versions": []
}