Settling the half-life of 60Fe: fundamental for a versatile astrophysical chronometer

In order to resolve a recent discrepancy in the half-life of 60Fe, we performed an independent measurement with a new method that determines the 60Fe content of a material relative to 55Fe (t1/2=2.744 yr) with accelerator mass spectrometry. Our result of (2.50±0.12)×10(6) yr clearly favors the rec...
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Autor*in:	Wallner, A [verfasserIn] Bichler, M Buczak, K Dressler, R Fifield, L K Schumann, D Sterba, J H Tims, S G Wallner, G Kutschera, W

Format:	Artikel
Sprache:	Englisch

Erschienen:	2015

Systematik:	UA 1000

Übergeordnetes Werk:	Enthalten in: Physical review letters - Ridge, NY : American Physical Society, 1958, 114(2015), 4
Übergeordnetes Werk:	volume:114 ; year:2015 ; number:4

Links:	Link aufrufen

Katalog-ID:	OLC1962813029

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dewey-full	550
title_sort	settling the half-life of 60fe: fundamental for a versatile astrophysical chronometer
title_auth	Settling the half-life of 60Fe: fundamental for a versatile astrophysical chronometer
abstract	In order to resolve a recent discrepancy in the half-life of 60Fe, we performed an independent measurement with a new method that determines the 60Fe content of a material relative to 55Fe (t1/2=2.744 yr) with accelerator mass spectrometry. Our result of (2.50±0.12)×10(6) yr clearly favors the recently reported value (2.62±0.04)×10(6) yr, and rules out the older result of (1.49±0.27)×10(6) yr. The present weighted mean half-life value of (2.60±0.05)×10(6) yr substantially improves the reliability as an important chronometer for astrophysical applications in the million-year time range. This includes its use as a sensitive probe for studying recent chemical evolution of our Galaxy, the formation of the early Solar System, nucleosynthesis processes in massive stars, and as an indicator of a recent nearby supernova.
abstractGer	In order to resolve a recent discrepancy in the half-life of 60Fe, we performed an independent measurement with a new method that determines the 60Fe content of a material relative to 55Fe (t1/2=2.744 yr) with accelerator mass spectrometry. Our result of (2.50±0.12)×10(6) yr clearly favors the recently reported value (2.62±0.04)×10(6) yr, and rules out the older result of (1.49±0.27)×10(6) yr. The present weighted mean half-life value of (2.60±0.05)×10(6) yr substantially improves the reliability as an important chronometer for astrophysical applications in the million-year time range. This includes its use as a sensitive probe for studying recent chemical evolution of our Galaxy, the formation of the early Solar System, nucleosynthesis processes in massive stars, and as an indicator of a recent nearby supernova.
abstract_unstemmed	In order to resolve a recent discrepancy in the half-life of 60Fe, we performed an independent measurement with a new method that determines the 60Fe content of a material relative to 55Fe (t1/2=2.744 yr) with accelerator mass spectrometry. Our result of (2.50±0.12)×10(6) yr clearly favors the recently reported value (2.62±0.04)×10(6) yr, and rules out the older result of (1.49±0.27)×10(6) yr. The present weighted mean half-life value of (2.60±0.05)×10(6) yr substantially improves the reliability as an important chronometer for astrophysical applications in the million-year time range. This includes its use as a sensitive probe for studying recent chemical evolution of our Galaxy, the formation of the early Solar System, nucleosynthesis processes in massive stars, and as an indicator of a recent nearby supernova.
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container_issue	4
title_short	Settling the half-life of 60Fe: fundamental for a versatile astrophysical chronometer
url	http://www.ncbi.nlm.nih.gov/pubmed/25679883
remote_bool	false
author2	Bichler, M Buczak, K Dressler, R Fifield, L K Schumann, D Sterba, J H Tims, S G Wallner, G Kutschera, W
author2Str	Bichler, M Buczak, K Dressler, R Fifield, L K Schumann, D Sterba, J H Tims, S G Wallner, G Kutschera, W
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author2_role	oth oth oth oth oth oth oth oth oth
up_date	2024-07-04T04:22:41.410Z
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