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Re: [Phys-l] Fwd: decay constant variation and solar flares?!



yep, I didn't think of the expansion issue...it has been experimentally observed as well.

joe

Joseph J. Bellina, Jr. Ph.D.
Professor of Physics
Saint Mary's College
Notre Dame, IN 46556

On Sep 4, 2010, at 12:02 PM, brian whatcott wrote:

I liked the comment better, first time round.

Check out "These calculations show that the /work function/ of a metal
is a linear function of its /temperature/."
or
"The influence of thermal expansion of metals on the temperature
dependence of the work function is considered. Both the temperature
coefficient of the jellium work function and lattice corrections to the
work function are calculated for (110), (100) and (111) planes of Al,
and Pb. The calculation gives a negative temperature coefficient of the
jellium work function for all metals and different signs of the total
work function coefficient depending on the value of the core radius of
the Ashcroft model potential and also on the kind of plane"

I omitted the cites to JPhys, Phys Rev etc as commercial enterprises
inappropriate to an informal list of this kind. Google
'temperature constant of work function'
or 'temperature constant of work function' etc. for more detail

Brian W

Brian W

On 9/4/2010 8:20 AM, Joseph Bellina wrote:
Early in the morning. I meant I don't think the work function is
temperature dependent.

Joseph J. Bellina, Jr. Ph.D.

On Sep 4, 2010, at 9:01 AM, Joseph Bellina wrote:

I don't think the work function isn't temperature dependent, but the
rate of electron emission would be.

joe

Joseph J. Bellina, Jr. Ph.D.
Professor of Physics
Saint Mary's College
Notre Dame, IN 46556

On Sep 3, 2010, at 6:58 PM, brian whatcott wrote:

is the cathode's work function not
temperature dependent?


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