Re: Isotope decay chains

From: tadchem (thomas.davidson_at_dla.mil)
Date: 02/09/05 

Date: 9 Feb 2005 06:25:34 -0800

Y.Porat wrote:
> so where is the prove of their say chemical or other properties
> of Co60 becoming Ni60 are identucal tothe 'other Ni60
>
> but have you or anyone studied all th e properties of that Ni 60
> that was created in the way you described above ??? versus the
> 'ordinary' Ni 60??
> or may be you take it just fo rgranted that they are identical??

My apologies, but I am having trouble parsing your 'question' from the
post due to the confusing grammatical structures.

The data I have identifies 2 isomers of Co-60
http://nucleardata.nuclear.lu.se/NuclearData/toi/listnuc.asp?sql=&A1=60&A2=60&Z=27
They are called "Co-60' and 'Co-60m'.

The one with the 'm' suffix after the mass number is 'metastable' and
has a distictively different half-life and nuclear spin (measurable
with NMR).

The *chemical* properties are a function of the atomic number (which
identifies the element) and the mass number (which perturbs the
kinetics). For nuclear isomers, there are no *chemical* differences.

The high energy gamma radiation is ssociated with the dacay of Co-60.
Mostly, the Co-60m decays by internal transformation into Co-60, but
*both* isomers can decay into Ni-60 through beta emission. The gamma
radiation associated with the beta decay is different for the two
isomers:
http://nucleardata.nuclear.lu.se/NuclearData/toi/Gamma.asp?sql=&sortBy=AZ&A1=60&A2=60&Z=27

I only have data on one isomer of Ni-60:
http://nucleardata.nuclear.lu.se/NuclearData/toi/listnuc.asp?sql=&A1=60&A2=60&Z=28

If the two different isomers of Co-60 produce two different isomers of
Ni-60, I have not found any data to support this. I also find no data
to deny the possibility that the same isomer of Ni-60 can be produced
by two different decay paths from two different Co-60 isomers.

Tom Davidson
Richmond, VA

Relevant Pages

  • IRL: George Foreman new co-team owner of Panther Racing
    ... George Foreman Joins Panther Racing as Team Owner ... http://www.motorsport.com -- your source for motorsport news on the Internet ...
    (rec.autos.sport.info)
  • Re: How to find LPV approaches?
    ... or do I have to grovel through the whole approach book? ... Don't have the answer on how to search a database of approaches but Syracuse, ... I should add that there always seems to be WAAS NOTAMs for these approaches, ...
    (rec.aviation.ifr)
  • BRC: Darren Gass round two preview
    ... Young Northern Irish driver Daren Gass will drive his newly acquired ... Citroen C2 S1600 for the first time in anger on the forthcoming Jim Clark ...
    (rec.autos.sport.info)
  • RALLY: RAmer: Olympus Rally summary
    ... Ramana Lagemann earned his first win of the season ... this weekend after a fierce battle with Australian ... driver Andrew Pinker that saw the pair exchange the ...
    (rec.autos.sport.info)
  • Re: Isotope decay chains
    ... beta decay of Co-60 is not identical to natural Ni-60. ... Co-60 decays into an excited state of Ni-60, ...
    (sci.physics)