The study of staple food products is crucial to assure public safety and provides input for predictive dose assessment models. To further this goal, the activity concentrations, transfer factors, and radiological hazards of ²²⁶Ra, ²³²Th, ⁴⁰K, and ¹³⁷Cs were studied for ten pairs of selected vegetables and soils in Tien Le near Hanoi in Vietnam. This is the first study in this area for Vietnamese vegetable samples. The ten most popular vegetables in Vietnamese diet were selected, namely choy sum, crown daisy, lettuce, cabbage, Malabar spinach, beans, sweet potato, potato, kohlrabi and carrot. The research results showed that the activity concentrations observed in vegetable crops did not present the previously reported strong correlation to those in soil. The ranges of TFs of ²²⁶Ra, ²³²Th, and ⁴⁰K were 4 × 10⁻² – 6.9 × 10⁻¹, 8 × 10⁻² – 9.7 × 10⁻¹; and 1.0 × 10⁰–1.6 × 10¹, respectively. Values for leafy vegetables and tubers exceed previous world range figures for Th and K. The soil has been evaluated for radiological hazard indices, which predict almost no risk to human health in the study area.

对主食产品的研究对于确保公众安全至关重要，并为预测剂量评估模型提供了投入。为了达到这个目标，需要检测²²⁶ Ra，²³² Th，⁴⁰ K和¹³⁷的活度浓度，转移因子和放射危害在越南河内附近的天乐对十对精选蔬菜和土壤进行了Cs研究。这是该领域对越南蔬菜样品的首次研究。选择了越南饮食中最受欢迎的十种蔬菜，分别是菜和，皇冠雏菊，生菜，白菜，马拉巴尔菠菜，豆类，地瓜，马铃薯，大头菜和胡萝卜。研究结果表明，在蔬菜作物中观察到的活性浓度与土壤中的活动浓度没有先前报道的强相关性。²²⁶ Ra，²³² Th和⁴⁰ K的TF范围为4×10 ^-2 – 6.9×10 ^-1、8 ×10 ^-2 – 9.7×10 ^-1；和1.0×10 ⁰ –1.6×10¹。多叶蔬菜和块茎的价值超过了世界范围内的Th和K值。对土壤的放射危害指数进行了评估，该指数预测该研究区域对人类健康几乎没有危害。