Recent content by amyy

I get your point. Thanks very much.

If we call a nucleus a sd shell nucleus, should its last proton and last neutron both lie in the sd shell or just one lies in the sd shell? For example, 15F, whose proton number is 9 and neutron number is 6. Then the last proton lies in the 1d5/2 orbit and the last neutron lies in the 1p3/2...

Physiscs-Tutor, hello I see your point, thank you very much for explaining it to me:smile:

TSny, hello! You are so funny. I guess you must enjoy studying physics very much. I see your view, and I totally agree with your ideas. Thank you very much for your help:smile:

Hi, Ray Vickson, thank you very much for your reply! This is from the Wikipedia https://en.wikipedia.org/wiki/Relativistic_particle You said it depends on accuracy, could you give me an example please? If the 36Ar18+ is accelerated up to some certain speed, we will consider relativistic...

Homework Statement Massive particles are relativistic when their kinetic energy is comparable to or greater than the energy corresponding to their rest mass. (This condition implies that their speed is close to the speed of light.) But what does the comparable mean? Is it that the particle...

Hi, TSny! Thank you very much for your reply! You mentioned that the magnitude of mass excess is the energy required to break the nucleus into individual separated nucleons, and it's often negative. But I also find there are some nuclei whose mass excess is positive, such as M.E. of 3He is...

Homework Statement 3H has more tightly bound than 3He. Why is it, then, that 3H beta-decays to 3He? Homework Equations I also wonder what is the physical meaning of the value mass excess Δ(Z,A)≡[M(Z,A)-A]c2, or it is just for the convenience of calculations. The Attempt at a Solution B/A of...