Thin- and thick-target cross sections for the production of 53Mn
and 60Fe
S. Merchel a,b , T. Faestermann c,
U. Herpers b, K. Knie c,
G. Korschinek c, I. Leya d,
R. Michel e, G. Rugel c
and C. Wallner c
a Max-Planck-Institut für Chemie,
Abteilung Kosmochemie, Joh. J.-Becherweg 27, D-55020 Mainz, Germany
b Abteilung Nuklearchemie, Universität
zu Köln, Otto-Fischer-Str. 12-14, D-50674 Köln, Germany
c Fakultät für Physik, TU München,
D-85748 Garching, Germany
d Institut für Isotopengeologie
und Mineralische Rohstoffe, ETH Zürich, CH-8092 Zürich, Switzerland
e Zentrum für Strahlenschutz und
Radioökologie, Universität Hannover, Am Kleinen Felde 30, D-30167
Hannover, Germany
Abstract
Integral cross sections of the nuclear reactions natFe(p,x)53Mn,
natNi(p,x)53Mn and natNi(p,x)60Fe
up to proton energies of 2.6 GeV were measured by means of accelerator
mass spectrometry. Additionally, elemental production rates from targets
placed in an isotropically irradiated iron sphere were determined. They
provide the basis to calculate the corresponding neutron-induced cross
sections. Both types of nuclear data are needed for the calculation of
depth- and size-dependent production rates of the long-lived cosmogenic
radionuclides, which gives us the possibility to discuss experimental abundances
of 53Mn and 60Fe in extraterrestrial matter.
PACS:
01.30Cc; 06.60.Ei; 24.10.Lx; 25.40.-h; 82.80.Ms; 96.35.Cp;
96.40.De; 96.40.Vw; 96.50.Mt
Keywords:
Accelerator mass spectrometry; Cosmogenic radionuclides;
Cross sections
*Corresponding author. Tel.: +49-6131-305261;
fax: +49-6131-305575
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