Triple F—a comet nucleus sample return mission (2009)
Küppers, Michael, Keller, H. U., Kührt, E., A’Hearn, M. F., Altwegg, K., Bertrand, R., ...
The Triple F (Fresh From the Fridge) mission, a Comet Nucleus Sample Return, has been proposed to ESA’s Cosmic Vision program. A sample return from a comet enables us to reach the ultimate goal of...
Triple F - A Comet Nucleus Sample Return Mission (2008)
Küppers, Michael, Keller, Horst Uwe, Kührt, Ekkehard, A'Hearn, Michael, Altwegg, Kathrin, Bertrand, R., ...
The Triple F (Fresh From the Fridge) mission, a Comet Nucleus Sample Return, has been proposed to ESA’s Cosmic Vision program. A sample return from a comet enables us to reach the ultimate goal of...
Triple F - A Comet Nucleus Sample Return Mission (2008)
Küppers, M., Keller, H.U., Kührt, E., A'Hearn, M.F., Altwegg, K., Bertrand, R., ...
Triple F-a comet nucleus sample return mission (2008)
Küppers, M., Keller, H. U., Kührt, E., A'Hearn, M. F., Altwegg, K., Bertrand, R., ...
Nguyen, A. N., Busemann, H., Nittler, L. R.
Isotopic studies of IDPs collected from the comet Grigg-Skjellerup dust stream reveal extremely high abundances of presolar grains in two of four IDPs. These abundances exceed those of any other...
Sandford, S. A., Aléon, J., Alexander, C. M. O’D., Araki, T., Bajt, S., Baratta, G. A., ...
This presenation will provide an overview of the efforts and results produced by the Organics Preliminary Examination Team during their studies of the samples returned from comet Wild 2 by the...
Busemann, H., Zega, T. J., Alexander, C. M. O'D., Cody, G. D., Kilcoyne, A. L. D., Nittler, L. R., ...
We located interstellar organics from a CR1 chondrite with NanoSIMS and analyzed FIB-extracted sections with XANES. D-rich material appears not associated with a functional group, whereas 15N-rich...
Correlated analyses of D- and 15N-rich carbon grains from CR2 chondrite EET 92042 (2006)
Busemann, H., Alexander, C. M. O'D., Nittler, L. R., Zega, T. J., Stroud, R. M., Bajt, S., ...
Extract from introduction: Insoluble organic matter (IOM) and matrix from primitive carbonaceous chondrites carry isotope enrichments (δD≤20000‰, δ15N≤3200‰) that are comparable to those in...
Correlated analytical studies of organic material from the Tagish Lake carbonaceous chondrite (2006)
Zega, T. J., Stroud, R. M., Nittler, L. R., Busemann, H., Alexander, C. M. O'D.
We report on correlated studies of organic material using SIMS, FIB-SEM, and TEM.
Nittler, L. R., Busemann, H., Hoppe, P.
We report microscale H and N isotopic and Raman spectral data for IDPs collected in April 2003. The samples show extreme D and 15N enrichments carried by very primitive organic matter. A high...
Busemann, H., Alexander, C. M. O'D., Nittler, L. R., Zega, T. J., Stroud, R. M., Cody, G. D., ...
We discuss correlated examinations of organic matter from the CR2 chondrite EET 92042, using SIMS, STXM and other methods. We found a large, isotopically highly anomalous region of probable presolar...
Research article - Comet 81P/Wild 2 under a microscope (2006)
Brownlee, D., Tsou, P., Aleon, J., Alexander, C. M. O., Araki, T., Bajt, S., ...
Interstellar chemistry recorded in organic matter from primitive meteorites (2006)
Busemann, H., Young, A. F., Alexander, C. M. O., Hoppe, P., Mukhopadhyay, S., Nittler, L. R.
Isotopic compositions of cometary matter returned by Stardust (2006)
McKeegan, K. D., Aleon, J., Bradley, J., Brownlee, D., Busemann, H., Butterworth, A., ...
Comet 81P/Wild 2 under a microscope (2006)
Brownlee, D., Tsou, P., Aleon, J., Alexander, C. M. O., Araki, T., Bajt, S., ...
Research article - Comet 81P/Wild 2 under a microscope (2006)
BROWNLEE, D, TSOU, P, ALEON, J, ALEXANDER, C, ARAKI, T, BAJT, S, ...
Extreme H isotopic anomalies in chondritic organic matter (2005)
Busemann, H., Alexander, C. M. O'D., Hoppe, P., Nittler, L. R., Young, A. F.
Extract from introduction: We have conducted ionprobe (IMS6f and NanoSIMS) imaging studies of various samples for H, D, C, 14N and 15N. These will ultimately be correlated with micro-analytic...
Extensive microscale N isotopic heterogeneity in chondritic organic matter (2005)
Nittler, L. R., Hoppe, P., Alexander, C. M. O'D., Busemann, H., Cody, G.
Introduction: H and N isotopic anomalies (mainly excesses of D and 15N) in organic matter from primitive meteorites and IDPs suggest preservation of presolar molecular cloud material [1-3]. However,...
Ancient volcanic xenon in single glass grains from the D'Orbigny angrite (2005)
Busemann, H., Busfield, A., Gilmour, J. D.
We present high-sensitivity xenon data for single glass grains from the D'Orbigny angrite. These grains contain the first sample of volcanic gas from a planetary body other than the Earth and excess...
Busemann, H., Alexander, C. M. O'D., Fries, M., Nittler, L., Steele, A.
We present results obtained by Raman spectroscopy of various organic residues of primitive chondrites in order to better characterize the microstructural state of the organic matter. These results...
Busemann, H., Bühler, F., Agafonov, Y. N., Baur, H., Bochsler, P., Eismont, N. A., ...
Introduction: The composition of the present interstellar medium (ISM) provides an important benchmark in cosmochemistry. It serves as a reference for galactic chemical evolution (GCE) models, solar...
Extract from introduction: Regolith breccias are breccias that contain solar-gas-bearing grains [1,2]. It is generally accepted that the exposure to the solar wind took place rather recently on the...
Busemann, H., Lorenzetti, S., Eugster, O.
We compare the noble gases in D'Orbigny glass and bulk. The glass was formed after the bulk silicates and contains interior solar noble gases that may originate from early volcanic activity on the...
Plutonium-Xenon systematics of Angrites (2003)
Introduction: Angrites are igneous meteorites that crystallized very early in the solar system, ~10 Ma after CAIs, as also implied by the presence of now extinct short-lived radionuclides such as...
The ingredients of the "Subsolar" noble gas component (2003)
Busemann, H., Eugster, O., Baur, H., Wieler, R.
On the basis of several experiments on separates of the EH5 chondrite St. Mark’s, we will argue that the “subsolar” noble gas component is a mixture of solar-like, Q- and terrestrial noble...
Busemann, H., Baur, H., Wieler, R.
We report evidence for tiny amounts of - most likely primordial - noble gases with solar-like elemental and isotopic composition admixed to Q-type primordial noble gases in an E chondrite. We will...
Surface analysis of Mercury with a mass-spectrometer (2002)
Whitby, J. A., Busemann, H., Rohner, U., Benz, W., Wurz, P.
Introduction: The European Space Agency BepiColombo mission to Mercury will include a lander, the Mercury Surface Element (MSE). Although the final configuration of instruments is still to be...
I-Xe analysis of a magnetic separate from Lodranite GRA95209 (2002)
Whitby, J. A., Busemann, H., Eugster, O., Holland, G., Gilmour, J. D.
I-Xe dating of a magnetic mineral separate from lodranite GRA95209 suggests that peak temperatures (and therefore melt migration) occurred early, at least a few million years before closure of the...
The trapped heavy noble gases in recently found Martian meteorites (2002)
The composition of the trapped Ar, Kr, and Xe in the Martian meteorites Los Angeles, Say Al Uhaymir 005/008, and 094 is discussed and found to be consistent with a mixture of Martian mantle and...
Phase Q - A carrier for subsolar noble gases (2002)
Busemann, H., Baur, H., Wieler, R.
We discuss noble gases in the E-chondrite St. Mark's indicating that the subsolar component does not exclusively reside in enstatite. Element and isotope abundances including He are presented....
On line etching of bulk EH5 St. Mark's — Radiogenic and subsolar noble gases (2002)
Busemann, H., Baur, H., Wieler, R.
Introduction: On line etching is very useful to analyse noble gas components such as “Q” or the solar wind [1, 2]. A bulk meteorite sample, however, has never been analysed by on line etching in...
Characterization of the noble gases and CRE age of the D'Orbigny angrite (2002)
Eugster, O., Busemann, H., Kurat, G., Lorenzetti, S., Varela, M. E.
Introduction: The D’Orbigny angrite, a 16.55 kg stone, was found 1979 in Argentina [1]. Mineralogy and chemistry of this meteorite were characterized in detail [2-6]. A Pb-U-Th age of 4.559 Ga was...
The pre-atmospheric size of Martian meteorites (2002)
Eugster, O., Busemann, H., Lorenzetti, S.
The pre-atmospheric size of martian meteorites was calculated based on 80Kr produced by epithermal secondary cosmic-ray produced neutrons of 30-300 eV energy. For seven meteorites we obtained minimum...
Busemann, H., Baur, H., Wieler, R.
Stepwise etching of acid-resistant residues from carbonaceous chondrites yields a new, extraordinarily low He isotopic ratio for phase Q that might represent early solar nebula composition. A much...
Subsolar noble gases in an acid-resistant residue of the EH5 chondrite St Mark's (2001)
Busemann, H., Baur, H., Wieler, R.
Extract from the introduction: Enstatite chondrites have remarkable properties: they were formed in a reducing environment, they are putatively similar to precursor material of Earth, Venus, or...