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Featured researches published by H. Bernhardt.
Applied Radiation and Isotopes | 2011
X. Li; Harald Breitkreutz; J. Burfeindt; H. Bernhardt; Mario Trieloff; Jens Hopp; Elmar K. Jessberger; Winfried H. Schwarz; P. Hofmann; Harald Hiesinger
For a future Moon landing, a concept for an in-situ NAA involving age determination using the (40)Ar-(39)Ar method is developed. A neutron source (252)Cf is chosen for sample irradiation on the Moon. A special sample-in-source irradiation geometry is designed to provide a homogeneous distribution of neutron flux at the irradiation position. Using reflector, the neutron flux is likely to increase by almost 200%. Sample age of 1Ga could be determined. Elemental analysis using INAA is discussed.
international conference on advancements in nuclear instrumentation, measurement methods and their applications | 2011
Harald Breitkreutz; X. Li; J. Burfeindt; H. Bernhardt; P. Hoffmann; Mario Trieloff; Winfried H. Schwarz; Jens Hopp; Elmar K. Jessberger; Harald Hiesinger
The ages of lunar rocks can be determined using the 40Ar−39Ar technique that can be used in-situ on the moon if a neutron source, a noble gas mass spectrometer and a gas extraction and purification system are brought to the lunar surface. A possible instrument for such a task is ISAGE, which combines a strong 252Cf neutron source and a compact spectrometer for in-situ dating of e.g. the South Pole Aitken impact basin or the potentially very young basalts south of the Aristachus Plateau. In this paper, the design of the neutron source will be discussed. The source is assumed to be a hollow sphere surrounded by a reflector, a geometry that provides a very homogeneous flux at the irradiation position inside the sphere. The optimal source geometry depending on the experimental conditions, the costs of transportation for the reflector and the costs of the source itself are calculated. A minimum 252Cf mass of 1.5mg is determined.
Planetary and Space Science | 2013
H. Bernhardt; Harald Hiesinger; Dennis Reiss; Mikhail A. Ivanov; G. Erkeling
Icarus | 2014
G. Erkeling; Dennis Reiss; Harald Hiesinger; Michael A. Ivanov; Ernst Hauber; H. Bernhardt
Journal of Geophysical Research | 2016
H. Bernhardt; Dennis Reiss; Harald Hiesinger; Mikhail A. Ivanov
Planetary and Space Science | 2017
Mikhail A. Ivanov; G. Erkeling; Harald Hiesinger; H. Bernhardt; Dennis Reiss
Planetary and Space Science | 2018
T. Heyer; Harald Hiesinger; Dennis Reiss; G. Erkeling; H. Bernhardt; D. Luesebrink; R. Jaumann
Geomorphology | 2017
H. Bernhardt; Dennis Reiss; Harald Hiesinger; Ernst Hauber; Andreas Johnsson
Journal of Geophysical Research | 2016
H. Bernhardt; Dennis Reiss; Harald Hiesinger; Mikhail A. Ivanov
Archive | 2016
T. Heyer; G. Erkeling; Harald Hiesinger; Dennis Reiss; D. Luesebrink; H. Bernhardt; R. Jaumann