Beschreibung:
<jats:title>Abstract</jats:title><jats:p>We perform a systematic and detailed study of the <jats:sup>14</jats:sup>C and <jats:sup>14</jats:sup>C‐<jats:sup>10</jats:sup>Be dating systems for meteorite terrestrial ages. Physical model calculations indicate that neither the <jats:sup>14</jats:sup>C production rates nor the <jats:sup>14</jats:sup>C/<jats:sup>10</jats:sup>Be production rate ratios are constant enough to be reasonably approximated by average values. By using simple averages, one introduces a significant size‐dependent bias into the database for meteorite terrestrial ages. By combining modeled <jats:sup>14</jats:sup>C production rates and <jats:sup>14</jats:sup>C/<jats:sup>10</jats:sup>Be production rate ratios with (<jats:sup>22</jats:sup>Ne/<jats:sup>21</jats:sup>Ne)<jats:sub>cos</jats:sub> ratios and assuming ~80% ablation losses, relatively easy to use correlations of <jats:sup>14</jats:sup>C production rates and <jats:sup>14</jats:sup>C/<jats:sup>10</jats:sup>Be production rate ratios as a function of (<jats:sup>22</jats:sup>Ne/<jats:sup>21</jats:sup>Ne)<jats:sub>cos</jats:sub> are established. The new correlations enable the determination of terrestrial ages that are more accurate than ages based solely on average values for <jats:sup>14</jats:sup>C and/or <jats:sup>14</jats:sup>C/<jats:sup>10</jats:sup>Be. We validate the model predictions by measuring <jats:sup>14</jats:sup>C activity concentrations, <jats:sup>14</jats:sup>C/<jats:sup>10</jats:sup>Be production rate ratios, <jats:sup>21</jats:sup>Ne<jats:sub>cos</jats:sub> concentrations, and (<jats:sup>22</jats:sup>Ne/<jats:sup>21</jats:sup>Ne)<jats:sub>cos</jats:sub> ratios in four recently fallen meteorites: Mt. Tazerzait, Boumdeid (2011), Bensour, and SaU 606. The experimental data confirmed the model predictions, although the available data are insufficient to be conclusive. More data from freshly fallen meteorites are needed for validating the model predictions for different chondrite sizes and chondrite types.</jats:p>