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- W2017006825 abstract "53Mn radionuclide (T1/2 = 3.7 × 106 y) is produced through the interaction of cosmic rays. Measurements of concentrations of 53Mn in rocks might help to understand Earth surface processes that occurred in time periods not accessible with other cosmogenic nuclides. Only accelerator mass spectrometry (AMS) can determine such ultratrace levels of 53Mn. The main interference in the detection of 53Mn by AMS is its stable isobar 53Cr, which is roughly ∼1012 times more abundant in nature. A prerequisite of any AMS measurement of 53Mn in geological samples is therefore chromium separation by an efficient chemistry. Thus, we have developed a method for the separation of chromium and manganese by using a radiometric simulation. The separation procedure was monitored by 51Cr (T1/2 = 27.70 d) and 52Mn (T1/2 = 5.59 d) as the corresponding radiotracers for chromium and manganese, respectively. The separation studies were performed by a liquid−liquid extraction technique using trioctylamine (TOA) diluted in cyclohexane. A high separation factor (∼16 000) for Mn and Cr can be obtained at optimal conditions of 0.8 M TOA and 9 M HCl. The developed method has been found equally applicable for real geological samples such as manganese crusts, lava, and sediment samples. Therefore, the method offers an important tool to improve 53Mn measurements by AMS." @default.
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- W2017006825 date "2006-09-23" @default.
- W2017006825 modified "2023-10-14" @default.
- W2017006825 title "Separation of No-Carrier-Added <sup>52</sup>Mn from Bulk Chromium: A Simulation Study for Accelerator Mass Spectrometry Measurement of <sup>53</sup>Mn" @default.
- W2017006825 doi "https://doi.org/10.1021/ac0607459" @default.
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