<P> In contrast, C4 feeders will have bone collagen with a value of − 7.5 ‰ and hydroxylapatite value of − 0.5 ‰ . </P> <P> In actual case studies, millet and maize eaters can easily be distinguished from rice and wheat eaters . Studying how these dietary preferences are distributed geographically through time can illuminate migration paths of people and dispersal paths of different agricultural crops . However, human groups have often mixed C3 and C4 plants (northern Chinese historically subsisted on wheat and millet), or mixed plant and animal groups together (for example, southeastern Chinese subsisting on rice and fish). </P> <Table> <Tr> <Th> nuclide symbol </Th> <Th> Z (p) </Th> <Th> N (n) </Th> <Th> isotopic mass (u) </Th> <Th> half - life </Th> <Th> decay mode (s) </Th> <Th> daughter isotope (s) </Th> <Th> nuclear spin </Th> <Th> representative isotopic composition (mole fraction) </Th> <Th> range of natural variation (mole fraction) </Th> </Tr> <Tr> <Td> </Td> <Td> 6 </Td> <Td> </Td> <Td> 8.037675 (25) </Td> <Td> 2.0 (4) × 10 s (230 (50) keV) </Td> <Td> 2p </Td> <Td> 6 Be </Td> <Td> 0 + </Td> <Td> </Td> <Td> </Td> </Tr> <Tr> <Td> </Td> <Td> 6 </Td> <Td> </Td> <Td> 9.0310367 (23) </Td> <Td> 126.5 (9) ms </Td> <Td> β (60%) </Td> <Td> 9 </Td> <Td> (3 / 2 −) </Td> <Td> </Td> <Td> </Td> </Tr> <Tr> <Td> β, p (23%) </Td> <Td> 8 Be </Td> </Tr> <Tr> <Td> β, α (17%) </Td> <Td> 5 Li </Td> </Tr> <Tr> <Td> </Td> <Td> 6 </Td> <Td> </Td> <Td> 10.0168532 (4) </Td> <Td> 19.290 (12) s </Td> <Td> β </Td> <Td> 10 </Td> <Td> 0 + </Td> <Td> </Td> <Td> </Td> </Tr> <Tr> <Td> </Td> <Td> 6 </Td> <Td> 5 </Td> <Td> 11.0114336 (10) </Td> <Td> 20.334 (24) min </Td> <Td> β (99.79%) </Td> <Td> 11 </Td> <Td> 3 / 2 − </Td> <Td> </Td> <Td> </Td> </Tr> <Tr> <Td> EC (. 21%) </Td> <Td> 11 </Td> </Tr> <Tr> <Td> </Td> <Td> 6 </Td> <Td> 6 </Td> <Td> 12 exactly </Td> <Td_colspan="3"> Stable </Td> <Td> 0 + </Td> <Td> 0.9893 (8) </Td> <Td> 0.98853--0.99037 </Td> </Tr> <Tr> <Td> </Td> <Td> 6 </Td> <Td> 7 </Td> <Td> 13.0033548378 (10) </Td> <Td_colspan="3"> Stable </Td> <Td> 1 / 2 − </Td> <Td> 0.0107 (8) </Td> <Td> 0.00963--0.01147 </Td> </Tr> <Tr> <Td> </Td> <Td> 6 </Td> <Td> 8 </Td> <Td> 14.003241989 (4) </Td> <Td> 5,730 years </Td> <Td> β </Td> <Td> 14 </Td> <Td> 0 + </Td> <Td> Trace </Td> <Td> <10 </Td> </Tr> <Tr> <Td> </Td> <Td> 6 </Td> <Td> 9 </Td> <Td> 15.0105993 (9) </Td> <Td> 2.449 (5) s </Td> <Td> β </Td> <Td> 15 </Td> <Td> 1 / 2 + </Td> <Td> </Td> <Td> </Td> </Tr> <Tr> <Td> </Td> <Td> 6 </Td> <Td> 10 </Td> <Td> 16.014701 (4) </Td> <Td> 0.747 (8) s </Td> <Td> β, n (97.9%) </Td> <Td> 15 </Td> <Td> 0 + </Td> <Td> </Td> <Td> </Td> </Tr> <Tr> <Td> β (2.1%) </Td> <Td> 16 </Td> </Tr> <Tr> <Td> </Td> <Td> 6 </Td> <Td> 11 </Td> <Td> 17.022586 (19) </Td> <Td> 193 (5) ms </Td> <Td> β (71.59%) </Td> <Td> 17 </Td> <Td> (3 / 2 +) </Td> <Td> </Td> <Td> </Td> </Tr> <Tr> <Td> β, n (28.41%) </Td> <Td> 16 </Td> </Tr> <Tr> <Td> </Td> <Td> 6 </Td> <Td> 12 </Td> <Td> 18.02676 (3) </Td> <Td> 92 (2) ms </Td> <Td> β (68.5%) </Td> <Td> 18 </Td> <Td> 0 + </Td> <Td> </Td> <Td> </Td> </Tr> <Tr> <Td> β, n (31.5%) </Td> <Td> 17 </Td> </Tr> <Tr> <Td> </Td> <Td> 6 </Td> <Td> 13 </Td> <Td> 19.03481 (11) </Td> <Td> 46.2 (23) ms </Td> <Td> β, n (47.0%) </Td> <Td> 18 </Td> <Td> (1 / 2 +) </Td> <Td> </Td> <Td> </Td> </Tr> <Tr> <Td> β (46.0%) </Td> <Td> 19 </Td> </Tr> <Tr> <Td> β, 2n (7%) </Td> <Td> 17 </Td> </Tr> <Tr> <Td> </Td> <Td> 6 </Td> <Td> 14 </Td> <Td> 20.04032 (26) </Td> <Td> 16 (3) ms (14 (+ 6 - 5) ms) </Td> <Td> β, n (72.0%) </Td> <Td> 19 </Td> <Td> 0 + </Td> <Td> </Td> <Td> </Td> </Tr> <Tr> <Td> β (28.0%) </Td> <Td> 20 </Td> </Tr> <Tr> <Td> </Td> <Td> 6 </Td> <Td> 15 </Td> <Td> 21.04934 (54) #</Td> <Td> <30 ns </Td> <Td> n </Td> <Td> 20 </Td> <Td> (1 / 2 +) #</Td> <Td> </Td> <Td> </Td> </Tr> <Tr> <Td> </Td> <Td> 6 </Td> <Td> 16 </Td> <Td> 22.05720 (97) #</Td> <Td> 6.2 (13) ms (6.1 (+ 14 - 12) ms) </Td> <Td> β </Td> <Td> 22 </Td> <Td> 0 + </Td> <Td> </Td> <Td> </Td> </Tr> </Table> <Tr> <Th> nuclide symbol </Th> <Th> Z (p) </Th> <Th> N (n) </Th> <Th> isotopic mass (u) </Th> <Th> half - life </Th> <Th> decay mode (s) </Th> <Th> daughter isotope (s) </Th> <Th> nuclear spin </Th> <Th> representative isotopic composition (mole fraction) </Th> <Th> range of natural variation (mole fraction) </Th> </Tr>

What is the most likely mode of decay for carbon 15
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