Measurement of the 60Fe(n,)61Fe reaction at the TRIGA reactor in Mainz and future possibilities at FRANZ

T. Heftrich1, M. Mikorski1, C. Beinrucker1, F. Käppeler2, K. Landwehr1, C. Lederer3, R. Reifarth1, S. Schmidt1, K.

Sonnabend1, and T. Thomas1

1Goethe-Universität Frankfurt, Max-von-Laue Straße 1, 60438 Frankfurt, GER, 2Forschungszentrum Karlsruhe, Postfach 3640, 76021 Karlsruhe, GER,

3Universität Wien, Doktor-Karl-Lueger-Ring 1, 1010 Wien, AUT

496. Wilhelm und Else Heraeus-SeminarTanja Heftrich February 07th , 2012

Astrophysical Motivation

496. Wilhelm und Else Heraeus-SeminarTanja Heftrich February 07th , 2012

• INTEGRAL measured 60Fe/26Al ratio along the galactic plane

• deep-sea manganese crust 60Fe

• 60Fe is an important s-process isotope determine production and destruction

rates

R. Diehl

Knie et al, PRL 93 (2004) 171103

496. Wilhelm und Else Heraeus-SeminarTanja Heftrich February 07th , 2012

60Fe

60Fe(n,)61Fe :activation

kT = 25 meV

59Fe(n,) :extremely difficult

60Fe(-) :in progress, new measurements:

1.49 Myr / 2.62 Myr

60Fe(,n) :coulomb dissociation

60Fe(n,)61Fe :activation

kT = 25 keV

60Fe(n,)61Fe :kT = 90 keV

60Fe(n,)61Fe @ TRIGA

• 60Fe sample was produced at the PSI in Villigen, Switzerland (ERAWAST I workshop)

• irradiation with thermal neutrons to get the depletion of 60Fe atkT = 25meV

496. Wilhelm und Else Heraeus-SeminarTanja Heftrich February 07th , 2012