Abstract：
The plant acts as an important route for the transfer of radionuclides from the soil to animals, leading to the transfer of radiation to human food products such as beef and milk. Therefore, the level of radioactivity in fodder plays a crucial role in deciding whether cattle may be allowed to graze in a certain area. In this study, the activities of 226Ra, 232Th and 40K were measured via gamma-ray spectrometry on different fodder samples, including napier leaves, rice straw, corn stalks, guinea grass, mixed pasture, palm oil leaves and palm kernel collected from Penang, Malaysia. Theoretical calculations were also conducted to estimate the levels of these radionuclides in caw\'s products (beef and milk), as well as their potential radiological impact on local consumers. On average, the annual effective dose due to ingestion of radionuclides in milk was 11.39 μSv y-1, whereas in beef it was 5.63 μSv y-1. These values are significantly lower than the worldwide average of 290 μSv y-1. Research confirmed that farmers\' usage of the aforementioned feeds did not cause any radiation-related health risks.
摘要：
该植物是放射性核素从土壤转移到动物的重要途径，导致辐射转移到人类食品，如牛肉和牛奶。因此,饲料中的放射性水平在决定是否允许牛在某个地区放牧中起着至关重要的作用。在这项研究中,226Ra的活动，通过伽马射线光谱法对不同的饲料样品测量了232Th和40K，包括纳皮尔树叶，稻草,玉米秸秆,几内亚草,混合牧场,从槟城收集的棕榈油叶和棕榈仁，马来西亚。还进行了理论计算，以估计caw产品（牛肉和牛奶）中这些放射性核素的水平，以及它们对当地消费者的潜在放射性影响。平均而言,由于摄入牛奶中的放射性核素而导致的年有效剂量为11.39μSvy-1，而牛肉为5.63μSvy-1。这些值显著低于290μSvy-1的全球平均值。研究证实，农民使用上述饲料不会造成任何与辐射相关的健康风险。
