# Need help with stable-unstable cores(cells)

by radioactive8
Tags: corescells, stableunstable
 Share this thread:
 P: 35 Hi....! I was trying to understand the meaning of the binary Energy (Eb) .. 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 Eb than Y ... while Y is the stable core for that exact A ... That means Because energy is never lost Eb + EY = Ep + En ⇔ .... ⇔ Eb = ( ZMp + NMn - MY )c2 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 ?
 Mentor P: 11,602 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.
P: 35
 What is "binary energy"? Do you mean "binding energy"?
Yes

 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.
This doent answer my question .....
I am wondering about which cell is stablier K or L (fro your example ) .. and why ...

 Mentor P: 11,602 Need help with stable-unstable 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.

 Related Discussions Engineering, Comp Sci, & Technology Homework 0 High Energy, Nuclear, Particle Physics 14 General Math 1 Advanced Physics Homework 8 General Physics 17