Re: [Phys-l] Alpha decay intensity against distance

[Bernard Cleyet <bernardcleyet@redshift.com>]

On 2009, Sep 19, , at 13:55, Bernard Cleyet wrote:

>  It
> has a coupala weak gammas that are convenient for fluorescence of
> high Z nuclei.




Correction!

The Am-241 is for low to medium Z atoms NOT nuclei;  fluorescence is  
excited by the ~ 60 KeV gammas.  This is a common expt. done to  
duplicate Moseley  more conveniently w/ gammas instead of fast  
electrons, etc.  For high Z atoms a nearly dead iron Mössbauer source  
is useful  (Co-57 ~ 122 keV **).



** mostly,  as w/ all electron capture decays, the emission is  
complicated including electrons.

http://www.nucleide.org/DDEP_WG/Nuclides/Co-57_tables.pdf

bc has incipient Alzheimer's


p.s. "Because of Moseley's death in the War, the British government  
began a policy of no longer allowing their scientists to enlist for  
combat."


http://en.wikipedia.org/wiki/Henry_Moseley