Pb 204
Atomic Percent Abundance: 1.4%
Spin: 0+
Half life: =>1.4E+17 years
Mode of decay: Alpha to Hg-200
Q-value from recommended values table: 1971.77 ± 1.35 keV
Pb 206
Atomic Percent Abundance: 24.1%
Spin:0+
Half life: => ? years
Mode of decay: Alpha to Hg-202
Q-value from recommended values table: 1136.56 ± 1.18 keV
Pb 207
Atomic Percent Abundance: 22.1%
Spin:1/2-
Half life: => ? years
Mode of decay: Alpha to Hg-203
Q-value from recommended values table: 391.47 ± 1.32 keV
Pb 208 (doubly magic!!)
Atomic percent abundance: 52.4%
Spin 0+
Half life: => ? years
Mode of decay: Alpha to Hg-204
Q-value from recommended values table: 518.80 ± 1.47 keV
I used these sites:
http://nucleardata.nuclear.lu.se/database/masses/ and
http://atom.kaeri.re.kr/ton/ From the first I found that the various isotopes of Pb,
believed to be stable to alpha decay, are even more apt
(energetically) to expell C-12 or C-14, with respect to
alpha-decay.
What do you think about?
> Pb 204
> Atomic Percent Abundance: 1.4%
> Spin: 0+
> Half life: =>1.4E+17 years
> Mode of decay: Alpha to Hg-200
> Q-value from recommended values table: 1971.77 ± 1.35 keV
> Pb 206
> Atomic Percent Abundance: 24.1%
> Spin:0+
> Half life: => ? years
> Mode of decay: Alpha to Hg-202
> Q-value from recommended values table: 1136.56 ± 1.18 keV
> Pb 207
> Atomic Percent Abundance: 22.1%
> Spin:1/2-
> Half life: => ? years
> Mode of decay: Alpha to Hg-203
> Q-value from recommended values table: 391.47 ± 1.32 keV
> Pb 208 (doubly magic!!)
> Atomic percent abundance: 52.4%
> Spin 0+
> Half life: => ? years
> Mode of decay: Alpha to Hg-204
> Q-value from recommended values table: 518.80 ± 1.47 keV
> I used these sites:http://nucleardata.nuclear.lu.se/database/masses/ > andhttp://atom.kaeri.re.kr/ton/ > From the first I found that the various isotopes of Pb,
> believed to be stable to alpha decay, are even more apt
> (energetically) to expell C-12 or C-14, with respect to
> alpha-decay.
> What do you think about?
BTW, could you help me to define the lacking half-life?
> > I used these sites:http://nucleardata.nuclear.lu.se/database/masses/ > > andhttp://atom.kaeri.re.kr/ton/ > > From the first I found that the various isotopes of Pb,
> > believed to be stable to alpha decay, are even more apt
> > (energetically) to expell C-12 or C-14, with respect to
> > alpha-decay.
> > What do you think about?
> BTW, could you help me to define the lacking half-life?
It can be either measured, either predicted by nuclear QM calculations.
It cannot be defined.
It cannot be either calculated from energetical change.
All kernels behind 60Ni has lower and lower binding energy per nucleon.
What matter is energetic barrier
and probability of breaching the barrier.
> > > I used these sites:http://nucleardata.nuclear.lu.se/database/masses/ > > > andhttp://atom.kaeri.re.kr/ton/ > > > From the first I found that the various isotopes of Pb,
> > > believed to be stable to alpha decay, are even more apt
> > > (energetically) to expell C-12 or C-14, with respect to
> > > alpha-decay.
> > > What do you think about?
> > BTW, could you help me to define the lacking half-life?
> It can be either measured,
> either predicted by nuclear QM calculations.
> It cannot be defined.
OK, I trust you
> It cannot be either calculated from energetical change.
About this I something knew, thanks.
> All kernels behind 60Ni has lower and lower binding energy per nucleon.
Also for this.
> What matter is energetic barrier
> and probability of breaching the barrier.
OK, but some physicists insist to say that
I cannot speak of a barrier and the consequent
concept of going through that barrier.
> From the first I found that the various isotopes of Pb,
> believed to be stable to alpha decay, are even more apt
> (energetically) to expell C-12 or C-14, with respect to
> alpha-decay.
> What do you think about?
> Ciao, Angelo
--------------------
see the schemes of Pb and Bi
in detail
including the ''map''
of the location of any of possible isotopes
indicated by numbering of neutrons by the figures that gives the isotop its name
pleasenote that that map shwes among the othres
the maximum possible attached neutrons thatis the highest possible isotope iow
all the possible locations for neutrons are filled up .
