Search for live 182Hf in deep-sea sediments

Christof Vockenhuber; C. Feldstein; M. Paul; N. Trubnikov; M. Bichler; R. Golser; W. Kutschera; A. Priller; P. Steier; S. Winkler

doi:10.1016/j.newar.2003.11.023

Search for live ¹⁸²Hf in deep-sea sediments

Christof Vockenhuber^*, C. Feldstein, M. Paul, N. Trubnikov, M. Bichler, R. Golser, W. Kutschera, A. Priller, P. Steier, S. Winkler

^*Corresponding author for this work

Racah Institute of Physics

Research output: Contribution to journal › Short survey › peer-review

24 Scopus citations

Abstract

The presence of live ¹⁸²Hf (t_1/2∼9 Myr) in the early solar system is well established but the understanding of its abundance is still challenging. Live ¹⁸²Hf is expected to be present in the interstellar medium (ISM) as a result of recent nucleosynthesis activity. We are attempting a search for live ¹⁸²Hf possibly deposited on Earth. The search focuses on deep-ocean sediments and a method for chemical extraction of the Zr-Hf fraction from sediments has been developed. The detection of ¹⁸²Hf is performed at the Vienna Environmental Research Accelerator (VERA). Measurements of Hf and W isotopic abundances for the Zr-Hf fraction extracted from deep-sea sediment samples were performed. Present limits for the ¹⁸²Hf abundance derived from the measured isotopic abundances are discussed.

Original language	English
Pages (from-to)	161-164
Number of pages	4
Journal	New Astronomy Reviews
Volume	48
Issue number	1-4
DOIs	https://doi.org/10.1016/j.newar.2003.11.023
State	Published - Feb 2004

Keywords

Accelerator mass spectrometry
Extinct radioactivities
Hf
ISM

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10.1016/j.newar.2003.11.023

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title = "Search for live 182Hf in deep-sea sediments",

abstract = "The presence of live 182Hf (t1/2∼9 Myr) in the early solar system is well established but the understanding of its abundance is still challenging. Live 182Hf is expected to be present in the interstellar medium (ISM) as a result of recent nucleosynthesis activity. We are attempting a search for live 182Hf possibly deposited on Earth. The search focuses on deep-ocean sediments and a method for chemical extraction of the Zr-Hf fraction from sediments has been developed. The detection of 182Hf is performed at the Vienna Environmental Research Accelerator (VERA). Measurements of Hf and W isotopic abundances for the Zr-Hf fraction extracted from deep-sea sediment samples were performed. Present limits for the 182Hf abundance derived from the measured isotopic abundances are discussed.",

keywords = "Accelerator mass spectrometry, Extinct radioactivities, Hf, ISM",

author = "Christof Vockenhuber and C. Feldstein and M. Paul and N. Trubnikov and M. Bichler and R. Golser and W. Kutschera and A. Priller and P. Steier and S. Winkler",

year = "2004",

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doi = "10.1016/j.newar.2003.11.023",

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AU - Vockenhuber, Christof

AU - Feldstein, C.

AU - Paul, M.

AU - Trubnikov, N.

AU - Bichler, M.

AU - Golser, R.

AU - Kutschera, W.

AU - Priller, A.

AU - Steier, P.

AU - Winkler, S.

PY - 2004/2

Y1 - 2004/2

N2 - The presence of live 182Hf (t1/2∼9 Myr) in the early solar system is well established but the understanding of its abundance is still challenging. Live 182Hf is expected to be present in the interstellar medium (ISM) as a result of recent nucleosynthesis activity. We are attempting a search for live 182Hf possibly deposited on Earth. The search focuses on deep-ocean sediments and a method for chemical extraction of the Zr-Hf fraction from sediments has been developed. The detection of 182Hf is performed at the Vienna Environmental Research Accelerator (VERA). Measurements of Hf and W isotopic abundances for the Zr-Hf fraction extracted from deep-sea sediment samples were performed. Present limits for the 182Hf abundance derived from the measured isotopic abundances are discussed.

AB - The presence of live 182Hf (t1/2∼9 Myr) in the early solar system is well established but the understanding of its abundance is still challenging. Live 182Hf is expected to be present in the interstellar medium (ISM) as a result of recent nucleosynthesis activity. We are attempting a search for live 182Hf possibly deposited on Earth. The search focuses on deep-ocean sediments and a method for chemical extraction of the Zr-Hf fraction from sediments has been developed. The detection of 182Hf is performed at the Vienna Environmental Research Accelerator (VERA). Measurements of Hf and W isotopic abundances for the Zr-Hf fraction extracted from deep-sea sediment samples were performed. Present limits for the 182Hf abundance derived from the measured isotopic abundances are discussed.

KW - Accelerator mass spectrometry

KW - Extinct radioactivities

KW - Hf

KW - ISM

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JO - New Astronomy Reviews

JF - New Astronomy Reviews

IS - 1-4

ER -

Search for live ¹⁸²Hf in deep-sea sediments

Abstract

Keywords

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