If Ni-64 transmutes to Ni-65 by adding a slow neutron and then decays to
Cu-65, there are no neutrons produced--only a + beta emission I think.
Bob Cook
-----Original Message-----
From: H LV
Sent: Tuesday, March 22, 2016 3:00 PM
To: vortex-l@eskimo.com
Subject: Re: [Vo]:Kamacite and natural fractionation of heavy nickel
The stimulated decay of 64Ni should be accompanied by neutrons and/or
radioactivity. If it decayed directly to 62Ni this would generate
detectable neutrons and other radioactive isotopes.
On the other hand if 64Ni decayed to 62Ni by first decaying to 63Ni,
then 63Ni should be detectable since it has a half life of about 100
years.
Harry
On Tue, Mar 22, 2016 at 5:32 PM, Jones Beene <jone...@pacbell.net> wrote:
Iron-nickel meteorites can contain high levels of heavy nickel (64Ni).
In space debris analyzed at U of Chicago, an increase of ~500‰ excess in
64Ni has been found in samples. This is about the level of the heavy
nickel
which Parkhomov used in the Sochi paper. We are trying to find out where
his
nickel came from since it must have been natural and he was unaware.
The main Fe/Ni alloy that makes this natural kind of enrichment happen is
called kamacite. The process is called “fractionation” and it requires
millions of years in space to happen. Of course, to balance things out,
there is another distinct alloy in iron meteorites which often has low
levels of heavy nickel, and it is call taenite. The first kamacite was
found
at Meteor Crater, Arizona and it is common all over the world. There are
occasional listings on eBay for kamacite, but the expected level of
enrichment is not known.
When meteorites are heated and cooled and subjected to magnetic fields as
they orbit the sun, heavy nickel migrates from taenite to kamacite. Thus,
there is a known way that enrichment in heavy nickel can occur naturally
and
probably something similar could happen with in an industrial setting with
zone refining – should it be shown that 64Ni is the active isotope.
