How to calculate thermionic work function

AI Thread Summary
The thermionic work function can be approximated as half the ionization energy of an element, but calculating it precisely involves considering the effective surface dipole and its relation to Fermi energy. Hydrogen does have a work function, although it is typically low due to its simple atomic structure. For exact calculations, specific formulas or references, such as DOI: 10.1103/PhysRevB.68.195408, are recommended. The discussion emphasizes the complexity of determining the work function accurately. Understanding these factors is crucial for applications in thermionic emission.
nuby
Messages
336
Reaction score
0
How do you calculate the thermionic work function of an element (hydrogen for example)?

I understand it is usually about 1/2 the ionization energy , but is there a formula to get the exact energy?

Can hydrogen even have a work function?

Thanks in advance.
 
Physics news on Phys.org
its related to the fermi energy more than the ionization energy, but the difficult part is the effective surface dipole

try this:

DOI: 10.1103/PhysRevB.68.195408
 
Thanks. Do you have a link for it?
 

Thread 'Is calling fictitious forces "not real" just about terminology?'

Hi there, im studying nanoscience at the university in Basel. Today I looked at the topic of intertial and non-inertial reference frames and the existence of fictitious forces. I understand that you call forces real in physics if they appear in interplay. Meaning that a force is real when there is the "actio" partner to the "reactio" partner. If this condition is not satisfied the force is not real. I also understand that if you specifically look at non-inertial reference frames you can...
View full post »

Thread 'Derivation of Hamilton's Principle: Questions'

I have recently been really interested in the derivation of Hamiltons Principle. On my research I found that with the term ##m \cdot \frac{d}{dt} (\frac{dr}{dt} \cdot \delta r) = 0## (1) one may derivate ##\delta \int (T - V) dt = 0## (2). The derivation itself I understood quiet good, but what I don't understand is where the equation (1) came from, because in my research it was just given and not derived from anywhere. Does anybody know where (1) comes from or why from it the...
View full post »

Similar threads

How does thermionic emission work?
Replies
2
Views
2K
I Work-Energy Theorem for Moving Block and Spring System?
Replies
4
Views
2K
I Why does the main muscle use the most energy in body movements?
Replies
24
Views
2K
B The work done by two objects on each other
2
Replies
55
Views
3K
Probability density function in classical mechanics
Replies
1
Views
1K
Definite and indefinite integration in the definition of work
Replies
4
Views
8K
Rotational Work versus Linear Work
Replies
14
Views
2K
I Kinetic Energy derivation assumption?
Replies
11
Views
2K
B About verification on Kinetic energy and work
Replies
16
Views
2K
I How come you have to use work energy to find v0 of spring?
Replies
9
Views
1K

Hot Threads

Recent Insights

Back
Top