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Monoenergetic Neutrons for Stellar Applications

  • M. Mosconi (a1) (a2), M. Heil (a2) (a3), F. Käppeler (a2), R. Plag (a2) (a3), A. Mengoni (a4) and R. Nolte (a1)...

Abstract

With modern techniques, neutron-capture cross sections can be determined with uncertainties of a few percent. However, Maxwellian averaged cross sections calculated from such data require a correction (because low-lying excited states are thermally populated in the hot stellar photon bath) which has to be determined by theoretical calculations. These calculations can be improved with information from indirect measurements, in particular by the inelastic scattering cross section. For low-lying levels, the inelastically scattered neutrons are difficult to separate from the dominant elastic channel. This problem is best solved by means of pulsed, monoenergetic neutron beams. For this reason, a pulsed beam of 30 keV neutrons with an energy spread of 7 to 9 keV FWHM and a width from 10 to 15 ns has been produced at Forschungszentrum Karlsruhe using the 7Li(p, n)7Be reaction directly at the reaction threshold. With this neutron beam the inelastic scattering cross section of the first excited level at 9.75 keV in 187Os was determined with a relative uncertainty of 6%. The use of monoenergetic neutron beams has been further pursued at the Physikalisch-Technische Bundesanstalt in Braunschweig, including the 3H(p, n)3He reaction for producing neutrons with an energy of 64 keV.

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Copyright

Corresponding author

E Corresponding author. Email: marita.mosconi@ptb.de

References

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Aliberti, G. et al., 2006, AnNE, 33, 700
Argast, D., Samland, M., Thielemann, F. K. & Qian, Y. Z., 2004, A&A, 416, 997
Bao, Z.Y., Beer, H., Käppeler, F., Voss, F., Wisshak, K. & Rauscher, T., 2000, ADNDT, 76, 70
Bokhovko, M., Kononov, V., Poletaev, E., Rabotnov, N. & Timokhov, V., 1992, in Nuclear Data for Science and Technology, Ed. Qaim, S. (Berlin: Springer), 62
Bosch, F. et al., 1996, PhRvL, 77, 5190
Browne, J. C. & Berman, B. L., 1981, PhRvC, 23, 1434
Burbidge, E. M., Burbidge, G. M., Fowler, W.A. & Hoyle, F., 1957, RvMP, 29, 547
Busso, M., Gallino, R. & Wasserburg, G., 1999, ARA&A, 37, 239
Clayton, D. D., 1964, ApJ, 139, 637
Dillmann, I., 2008, AIPC, 1016, 143
Hershberger, R., Macklin, R., Balakrishnan, M., Hill, N. & McEllistrem, M., 1983, PhRvC, 28, 2249
Iliadis, C., 2007, Nuclear Physics of Stars (Wenheim, Germany: Wiley-VCH)
Krane, K. S., 1987, Introductory Nuclear Physics (John Wiley and Sons)
Kratz, K.-L., Farouqi, K. & Pfeiffer, B., 2007, PrPNP, 59, 147
Litvinsky, L. L., Murzin, A. V. & Shkarupa, A. M., 1993, PAN, 56, 1161
Litvinsky, L. L., Zhigalov, Y. A., Libman, V. A., Murzin, A. V. & Shkarupa, A. M., 1995, PAN, 58, 164
Macklin, R., Winters, R., Hill, N. & Harvey, J., 1983, ApJ, 274, 408
Massimi, C. et al., 2008, in Proc. Int. Conf. Nuclear Data for Science and Technology, Eds. Bersillon, O., Gunsing, F., Bauge, E., Jacqmin, R. & Leray, S. (EDP Sciences), 1265
Mengoni, A. et al., 2008, in Proc. NICX, Proceedings of Science, in press
Monahan, J., 1960, in Fast Neutron Physics, part I, Eds. Marion, J. B. & Fowler, J. L. (NewYork: Interscience Publishers Inc.)
Mosconi, M., 2002, Master's Thesis, Università degli Studi di Torino
Mosconi, M., 2007, PhD Thesis, Karlsruhe Universität
Mosconi, M., Plag, R., Heil, M., Käppeler, F. & Mengoni, A., 2007, in Proc. 8th Int. Topical Meeting on Nuclear Applications and Utilization of Accelerators (American Nuclear Society), 807
Mosconi, M. et al., 2007b, PrPNP, 59, 165
Mosconi, M. et al., 2008, JPhG, 35, 014015
Praena, J., Mastinu, P. F., Calviani, M. & Martin, G., 2007, LNL Annual Report 2008, 214
Ratynski, W. & Käppeler, F., 1988, PhRvC, 37, 595
Rauscher, T., 2005, NuPhA, 758, 655
Salvatores, M.,Aliberti, G. & Palmiotti, G., 2008, in Proc. Int. Conf. Nuclear Data for Science and Technology, Eds. Bersillon, O., Gunsing, F., Bauge, E., Jacqmin, R. & Leray, S. (EDP Sciences), 883
Schmidt, D. et al., 2005, NIMPA, 545, 658
Segawa, M. et al., 2007, PhRvC, 76, 022802
Tagliente, G. et al., 2008, in Proc. Int. Conf. Nuclear Data for Science and Technology, Eds. Bersillon, O., Gunsing, F., Bauge, E., Jacqmin, R. & Leray, S. (EDP Sciences), 1304
Winters, R. R. & Macklin, R. L., 1982, PhRvC, 25, 208
Wisshak, K., Guber, K., Voss, F., Käppeler, F. & Reffo, G., 1993, PhRvC, 48, 1401
Woosley, S. E. & Fowler, W. A., 1979, ApJ, 233, 411

Keywords

Monoenergetic Neutrons for Stellar Applications

  • M. Mosconi (a1) (a2), M. Heil (a2) (a3), F. Käppeler (a2), R. Plag (a2) (a3), A. Mengoni (a4) and R. Nolte (a1)...

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