Abstract
When including new predictions for β-delayed fission and neutron emission rates in an r-process calculation, the production ratios for 232Th/238U and 244Pu/238U are drastically lowered. Employing the chrono-metric pairs 232Th/238U 235U/238U 244Pu/238U and 129I/127I within a simple exponential model for chemical evolution of the Galaxy results in an age ranging roughly from 14 to 20×109. This is much larger than previous age determinations from actinide chronometers. Within the same model this value is consistant with predictions from the 187Re/187Os chronomet-ric pair and comparable with recent determinations of globular cluster ages and a Hubble constant of Ho < 70 km s-l Mpc-l. In more complex galactic evolution models the chronometers seem to lead to similar results, however, problems with the observed stellar age-metallicity relation are indicated.
This is a preview of subscription content, log in via an institution to check access.
Access this chapter
Tax calculation will be finalised at checkout
Purchases are for personal use only
Preview
Unable to display preview. Download preview PDF.
References
Anders, E., Ebihara, M.: 1982, Geochim. Cosmochim. Acta 46, 2363.
Blake, J.B., Woosley, S.E., Weaver, T.A., Schramm, D.N.: 1981, Astrophys. J. 248, 315.
Browne, J.C., Berman, B.L.: 1981, Phys. Rev. C23, 1434.
Burbidge, E.M., Burbidge, G.R., Fowler, W.A., Hoyle, F.: 1957, Rev. Mod. Phys. 29, 547.
Cameron, A.G.W.: 1982, in “Essays in Nuclear Astrophysics” (Cambridge University Press), p. 23.
Chen, J.H., Wasserburg, G.J.: 1980, Lunar Planet Sci. XI, 131.
Clayton, D.D.: 1983, Astrophys. J. 268, 381.
Cowan, J.J., Cameron, A.G.W., Truran, J.W.: 1983, Astrophys. J. 265, 429.
Fowler, W.A.: 1972, in “Cosmology, Fusion and Other Matters” ed. F. Reines, (Boulder: Colorado Assoc. Univ. Press) p. 67.
Fowler, W.A.: 1978, in Proc. Robert A. Welch Foundation Conference on Chemical Research XXI Cosmochemistry, Houston, p. 61.
Hainebach, K.L., Schramm, D.N.: 1977, Astrophys. J. 212, 347.
Hershberger, R.L., Macklin, R.L., Balakishnan, M., Hill, N.W., McEllistrem, M.T.: 1983, to be published.
Hilf, E.R., von Groote, H., Takahashi, K.: 1976, CERN 76-13, 142.
Hillebrandt, W., Klapdor, H.V., Oda, T., Thielemann, F.-K.: 1981, Astron. Astrophys. 99, 195.
Hillebrandt, W.: 1978, Space Sci. Rev. 21, 639.
Hillebrandt, W., Takahashi, K., Kodama, T.: 1976, Astron. Astrophys. 52, 63.
Howard, W.M., Möller, P.: 1980, At. Data Nucl. Data Tables 25, 219.
Hudson, B., Hohenberg, C.M., Kennedy, B.M., Podosek, F.A.: 1982, Lunar Planetary Sci. XIII, 346.
Janes, K., Demarque, P.: 1983, Astrophys. J. 264, 206.
Jeukenne, J.P., Lejeune, A., Mahaux, C: 1977, Phys. Rev. C16, 80.
Jordan, J., Kirsten, T., Richter, H.: 1980, Z. Naturforsch. 35a, 345.
Käppeler, F., Beer, H., Wisshak, K., Clayton, D.D., Macklin, R.L., Ward, R.A.: 1982, Astrophys. J., 257, 821.
Klapdor, H.V., Metzinger, J., Oda, T.: 1982, Z. Phys. A. 309, 91.
Klapdor, H.V., Oda, T., Metzinger, J., Hillebrandt, W., Thielemann, F.-K.: 1981, Z. Phys. A229, 213.
Krumlinde, J., Möller, P., Wene, C.O., Howard, W.M.: 1981, CERN 81-09, 260.
Krumlinde, J., Möller, P.: 1983, submitted to Nucl. Phys. A.
Lynn, J.E.: 1980, in “Nuclear Physics for Applications”, IAEA-SMR-43 Vienna, p. 353.
Mathews, G.J., Bloom, S.D., Hausman, R.F.: 1983, submitted to Phys. Rev. C.
Myers, W.D., Swiatecki, W.J.: 1967, Ark. Fys. 36, 343.
Reeves, H.: 1978, in “Protostars and Planets”, ed. T. Gehrels, (Tucson: Univ. Arizona Press) p. 389.
Reeves, H.: 1979, Astrophys. J. 237, 229.
Sandage, A.: 1982, Astrophys. J. 252, 553.
Sandage, A., Tammann, G.A.: 1982, Astrophys. J. 256, 339.
Schramm, D.N., Wasserburg, G.J.: 1970, Astrophys. J. 162, 57.
Seeger, P.A., Schramm, D.N.: 1970, Astrophys. J. 160, L157.
Symbalisty, E.M.D., Schramm, D.N.: 1981, Rep. Prog. Phys. 44, 293.
Thielemann, F.-K., Arnould, M., Hillebrandt, W.: 1979, Astron. Astrophys. 74, 175.
Thielemann, F.-K., Metzinger, J., Klapdor, H.V.: 1983a, Z. Phys. A309, 301.
Thielemann, F.-K., Metzinger, J., Klapdor, H.V.: 1983b, Astron. Astrophys. 123, 162.
Tinsley, B.M.: 1977, Astrophys. J. 216, 548.
Tinsley, B.M.: 1980, Fund. Cosmic Phys. 5, 287.
Truran, J.W., Cowan, J.J., Cameron, A.C.W.: 1978, Astrophys. J. (Letters) 222, L63.
Twarog, B.A.: 1980, Astrophys. J. 242, 242.
Yokoi, K., Takahashi, K., Arnould, M.: 1983, Astron. Astrophys. 117, 65.
Van den Berg, D.A.: 1983, Astrophys. J. Suppl. 51, 29.
Wene, C.O., Johannson, S.A.E.: 1976, CERN 76-13, 584.
Winters, R.R., Macklin, R.L., Halperin, J.: 1980, Phys. Rev. C21, 563.
Winters, R.R., Macklin, R.L.: 1982, Phys. Rev. C25, 208.
Woosley, S.E., Fowler, W.A.: 1979, Astrophys. J. 233, 411.
Author information
Authors and Affiliations
Editor information
Editors and Affiliations
Rights and permissions
Copyright information
© 1984 D. Reidel Publishing Company
About this paper
Cite this paper
Thielemann, FK. (1984). Actinide R-Process Chronometers and β-Delayed Fission. In: Chiosi, C., Renzini, A. (eds) Stellar Nucleosynthesis. Astrophysics and Space Science Library, vol 109. Springer, Dordrecht. https://doi.org/10.1007/978-94-009-6348-1_29
Download citation
DOI: https://doi.org/10.1007/978-94-009-6348-1_29
Publisher Name: Springer, Dordrecht
Print ISBN: 978-94-009-6350-4
Online ISBN: 978-94-009-6348-1
eBook Packages: Springer Book Archive