Questions tagged [neutrons]
The neutrons tag has no usage guidance.
6
questions
8
votes
1
answer
1k
views
Rotation direction of Pulsars
Pulsars are rotating neutron stars observed to have pulses of radiation at very regular intervals that typically range from milliseconds to seconds. It has a very strong magnetic fields which funnel ...
- 191
1
vote
0
answers
52
views
How sensitive are early universe abundance calculations to the neutron half-life?
Phys.org's Physicists announce the world's most precise measurement of neutron lifetime discusses the accepted for publication Phys. Rev. Letter Improved neutron lifetime measurement with UCNτ (links ...
- 32.4k
7
votes
2
answers
192
views
Why is the number density of neutrons much larger in neutron stars?
There is a particular argument given in Concepts In Thermal Physics by Blundell that I'm not able to understand:
A free neutron can decay with a mean life of about $15$ minutes but in stars, we have ...
- 463
9
votes
2
answers
234
views
Do the neutrons in neutron stars emit the radio waves?
Neutrons can, especially in extreme circumstances (and large concentrations) emit electromagnetic radiation. I specifically asked about this in Physics S.E. Has a free neutron ever been shown to ...
- 3,729
0
votes
1
answer
138
views
Do free protons and neutrons absorb much radiation? To affect astronomers' observations? If so, at what wavelength(s)?
In a plasma, or wherever, do the completely ionized nuclei commonly absorb much EM radiation? Or any free neutrons or protons? Can astronomers detect this? Enough so that astronomers take it into ...
- 3,729
5
votes
2
answers
150
views
Free neutrons and stellar nucleosynthesis
Both the R-process and the S-process of stellar nucleosynthesis rely on absorbing 1 (S) or more (R) neutrons. Where do they come from? I thought there are no free neutrons in stars. (Also the half-...
- 783