176 reputation
3
bio website faculty.washington.edu/…
location Seattle, WA, USA
age 34
visits member for 1 year, 10 months
seen Oct 29 at 5:31

Quantum nuclear supercomputer physicist


Jun
16
comment Why do all elements above $\require{mhchem}\ce{Fe}$ not decay to $\ce{Fe}$?
@ChrisWhite: The relevant quantity is mass per baryon, because baryon number is conserved. The additional mass due to having too many neutrons is associated with weak isospin, which is not conserved. Thus, that mass can be shed (via weak interactions) in the arbitrarily long time limit.
May
22
comment Is there experimental evidence that massless particles such as photons attract massive objects?
Chiral symmetry is broken by the gluonic field configuration of the vacuum, which produces chiral quark condensates as a secondary effect. In the absence of gluons, chiral symmetry would not be broken, whereas in the absence of sea quarks, it still is. One could use glueballs as a more direct example, except that accumulating enough glueballs to measure their gravitational effect would be impractical.
May
21
answered Is there experimental evidence that massless particles such as photons attract massive objects?
Mar
19
awarded  Student
Mar
19
asked What fraction of nuclear excited states are known?
Feb
21
awarded  Teacher
Feb
21
answered Spin and Parity of $^{17}_8 O$ excited states
Feb
3
awarded  Autobiographer