Tungsten Nuclear Anomalies in Planetesimal Cores

Details Tungsten Nuclear Anomalies in Planetesimal Cores Tungsten Nuclear Anomalies in Planetesimal Cores

Feb 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008apj...674.1234q&link_type=abstract

The Astrophysical Journal, Volume 674, Issue 2, pp. 1234-1241.

Astronomy and Astrophysics

Astronomy

16

Minor Planets, Asteroids, Nuclear Reactions, Nucleosynthesis, Abundances, Solar System: Formation, Stars: Abundances

Scientific paper

Use of the extinct 182Hf-182W chronometer to constrain the timing of planetary accretion and differentiation rests on the assumption that the solar nebula had homogeneous tungsten isotopic composition. Here, we report deficiencies of ~0.1 part in 10,000 in the abundance of 184W in group IVB iron meteorites relative to the silicate Earth. These are most likely due to incomplete mixing at the planetesimal scale (2-4 km radius bodies) of the products of slow (s-) and rapid (r-) neutron-capture nucleosynthesis in the solar nebula. The correction that must be applied to the 182Hf- 182W model age of core formation in IVB irons due to the presence of these nuclear anomalies is ~0.5 Myr.

Affiliated with

Also associated with

No associations

Rating

Tungsten Nuclear Anomalies in Planetesimal Cores does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Tungsten Nuclear Anomalies in Planetesimal Cores, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Tungsten Nuclear Anomalies in Planetesimal Cores will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1873634