Register to reply 
Need help with stableunstable cores(cells) 
Share this thread: 
#1
Dec2413, 12:19 PM

P: 35

Hi....!
I was trying to understand the meaning of the binary Energy (E_{b}) .. For example : Imagine we have two cores ... 1 from an X atom and 1 from an Y atom which have the same A and X has bigger E_{b} than Y ... while Y is the stable core for that exact A ... That means Because energy is never lost E_{b} + E_{Y} = E_{p} + E_{n} ⇔ .... ⇔ E_{b} = ( ZM_{p} + NM_{n}  M_{Y} )c^{2} But what i cant understand is the following Why isnt X more stable as it has bigger binary energy therefore the same number of protons and netrons are hold by bigger power ? HOWEVER if we look at the opposite way Why isnt any core with smaller binary energy and same A than X stablier because its stableness would require less energy ... But our researches have shown that both above are not true ... but why ? 


#2
Dec2413, 06:48 PM

Mentor
P: 12,081

What is "binary energy"? Do you mean "binding energy"?
An atom K can decay into another atom L of the same nucleon number if L has a larger binding energy, the opposite is not possible neglecting electron capture. 


#3
Dec2513, 08:20 AM

P: 35

I am wondering about which cell is stablier K or L (fro your example ) .. and why ... 


#4
Dec2513, 10:38 AM

Mentor
P: 12,081

Need help with stableunstable cores(cells)
If both are unstable, there is no general rule for their lifetimes, it depends on too many other factors (like nuclear spin, odd/even proton/neutron numbers and so on). The setup you described in post 1 (instable atom with larger binding energy decaying to stable atom with smaller binding energy) is not possible. Again, neglecting electron capture.



Register to reply 
Related Discussions  
Is this system stable or unstable?  Engineering, Comp Sci, & Technology Homework  0  
Stable or Unstable  High Energy, Nuclear, Particle Physics  14  
Stable/unstable algorithm  General Math  1  
Stable or Unstable EQ pt.  Advanced Physics Homework  8  
Proton: stable or unstable?  General Physics  17 