Question 1684
{"accessible":true,"alternatives":[{"id":8377,"text":"coherent scattering"},{"id":8378,"text":"Compton scatter"},{"id":8379,"text":"photoelectric effect"},{"id":8380,"text":"pair production"}],"archived":false,"correctAlternativeId":8380,"explanation":"\u003cp\u003e\u003ca href=\"/articles/pair-production\" title=\"Pair production\"\u003ePair production\u003c/a\u003e, like the photoelectric effect, results in the complete attenuation of the incident photon. Pair production can only occur if the incident photon energy is at least 1.022 MeV. As the photon interacts with the strong electric field around the nucleus it undergoes a change of state and is transformed into two particles (essentially creating matter from energy):\u003c/p\u003e\u003cul\u003e\n\u003cli\u003e\u003cp\u003eone electron\u003c/p\u003e\u003c/li\u003e\n\u003cli\u003e\u003cp\u003eone positron (antimatter equivalent of the electron)\u003c/p\u003e\u003c/li\u003e\n\u003c/ul\u003e","id":1684,"imageUrl":"https://prod-images-static.radiopaedia.org/multiple_choice_questions/182/Photoelectric_and_compton.010_big_gallery.jpeg","imageAttribution":{"kind":"case","rID":80801},"imageAttributionCaseInfo":{"title":"Types of photo-atom interaction - diagrams","contributor_name":"Frank Gaillard","contributor_param":"frank","case_rid":80801,"case_param":"types-of-photo-atom-interaction-diagrams"},"firstQuestionPath":"/questions/2748","nextQuestionPath":"/articles/coherent-scattering/questions/1683","relatedArticles":[{"id":30308,"title":"Compton effect","link":"/articles/compton-effect?lang=us"},{"id":29684,"title":"Photoelectric effect","link":"/articles/photoelectric-effect?lang=us"},{"id":31661,"title":"Pair production","link":"/articles/pair-production?lang=us"}],"alsoUsedIn":[],"stem":"\u003cp\u003eThe accompanying diagram best depicts which phenomenon?\u0026nbsp;\u003c/p\u003e","menuLinks":[{"text":"Report problem with question","url":"https://docs.google.com/forms/d/e/1FAIpQLSfO3soWYhOjJ7yErSysyCe5V4A1CqW7WK3rDA7MtAkecMGqNw/viewform?entry.1624461248\u0026entry.553583435=https://radiopaedia.org/questions/1684"}],"attemptsPercentages":[{"alternativeId":"8379","percentage":5},{"alternativeId":"8377","percentage":1},{"alternativeId":"8378","percentage":7},{"alternativeId":"8380","percentage":88}],"promptToLogin":false,"questionManager":false,"articleId":"coherent-scattering"}