Question 491
{"accessible":false,"alternatives":[{"id":2464,"text":"electron that pasess close to a nucleus and interacts with the nuclear field resulting in the ‘disappearance’ of the electron and the ‘creation’ of a ‘pair’ of electrons \r\n"},{"id":2465,"text":" electron that passes close to a nucleus and interacts with the nuclear field resulting in the ‘disappearance’ of the photon and the ‘creation’ of a ‘pair’ of electrons \r\n"},{"id":2466,"text":"photon that pasess close to a nucleus and interacts with the nuclear field resulting in the ‘disappearance’ of the electron and the ‘creation’ of a ‘pair’ of electrons \r\n"},{"id":2467,"text":"photon that pasess close to a nucleus and interacts with the nuclear field resulting in the ‘disappearance’ of the photon and the ‘creation’ of a ‘pair’ of electrons \r\n"}],"archived":false,"correctAlternativeId":2467,"explanation":"\u003cp\u003ePair production\u0026nbsp;(PP), like the\u0026nbsp;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.\u003c/p\u003e","id":491,"imageUrl":null,"imageAttribution":null,"imageAttributionCaseInfo":null,"firstQuestionPath":"/questions/1685","nextQuestionPath":"/articles/pair-production/questions/489","relatedArticles":[],"alsoUsedIn":[],"stem":"\u003cp\u003ePair production is defined as an incident\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/491"}],"attemptsPercentages":[{"alternativeId":"2466","percentage":17},{"alternativeId":"2465","percentage":13},{"alternativeId":"2464","percentage":11},{"alternativeId":"2467","percentage":59}],"promptToLogin":false,"questionManager":false,"articleId":"pair-production"}