Spur overlap effects in radiation chemistry

✍ Scribed by Nicholas J.B. Green; Rachel Harris

• Publisher: Elsevier Science
• Year: 1992
• Tongue: English
• Weight: 498 KB
• Volume: 198
• Category: Article
• ISSN: 0009-2614
• DOI: 10.1016/0009-2614(92)90052-o

✦ Synopsis

Events in a low linear energy transfer (LET) radiation track are generally well separated, and the spurs centred on each event can be considered to be isolated. However, even on such a track, there are important regions where many spurs overlap, and these regions become progressively more important as the LET increases. This paper reports preliminary results from a study of spur overlap on strings of equally spaced spurs, using the stochastic Monte Carlo and independent reaction times simulation techniques. Stochastic effects in the product yields are found to persist even in systems where there is a high degree of overlap. This surprising conclusion arises from correlations between the initial positions of particles formed in the same ionisation. If the usual interpretation of the concentration (independent, identically distributed particles) is taken, which does not recognise these correlations, the effect is not found.