Neutron Definition and 746 Threads

quasars are highly active but extremely distant galaxies, right?what kind of galaxies are they and do they represent an earlier stage of the lives of the conventional galaxies?i've a vague idea that quasars a galaxies in which the supermassive black holes at the centres are actively gobbling up...

Are Neutron Stars the major factors of Proton Stars? :http://arxiv.org/abs/astro-ph/0506092 Why do Neutron Stars evolve from Proton Star collapse, and what is the next evolving stage?..if any? :http://arxiv.org/abs/astro-ph/0506100 Can a further collapse occur that does 'not' produce...

What does a neutron star "look" like Hi, I have some questions for a scifi story I'm working on. First, what would a neutron star look like? What color are they, and how bright do they tend to be? By look like, I mean both seen from a theortical planet surface orbiting one (or mabye it would...

Under some circumstances, a star can collapse into an extremely dense object made mostly of neutrons and called a neutron star. The density of a neutron star is roughly 10^14 times as great as that of ordinary solid matter. Suppose we represent the star as a uniform, solid, rigid sphere...

[FONT=Arial Black]undefined what mass does a neutron star hove and what is its life span? and any other information on the subject would not go un-apiretiated

At the centre of an atomic bomb, there is a neutron sprayer, something that can produce neutron streams. What is this component? how do they work? How do we produce free neutrons on particle accelerators? Thanks

http://www.physics.ubc.ca/~heyl/ns2005/prospectus.html Neutron Stars at the Crossroads of Fundamental Physics I. Organizers Jeremy Heyl – University of British Columbia Vicky Kaspi – McGill University Feryal Özel – University of Arizona Krishna Rajagopal – Massachusetts Institute...

Where can I find PDF "Black holes White Dwars and Neutron Stars" Gents, Could u pls advise me if you know where can i find book "Black holes White Dwars and Neutron Stars" Authors Shapiro, Tuekolsky (free PDF or DJVu or other format) Thks

What are the forces that give asteroids their shapes? And what shape do neutron stars that do not rotate around its axis have?

Hey guys, I know this is basic nuclear physics but I've forgotten how to do it. Given the atomic mass of Oxygen 16 (8p 8n), Oxygen 15(7n 8p) and Nitrogen 15(8n 7p), having found the average energy binding energy per nucleon (i think i have it right) find how much energy is required to remove...

one reason it's good is that it is written for the Wiley "Encyclopedia of Physics" http://arxiv.org/abs/physics/0503245 Neutron Stars Gordon Baym, Frederick K. Lamb Comments: Encyclopedia of Physics 3rd ed., R.G. Lerner and G.L. Trigg, eds., Wiley-VCH, Berlin Abstract: "This short...

Came across this forum while searching the net for help. It's great to have a forum dedicated to physics. So hi to everyone :) Now to business. I'm stuck with this question. If you weigh 660N on the earth, what would you weigh on the surface of a neutron star that has the same...

Is there a website where I can find out what isotope I have if I know it's half life and energies of the beta particles emitted?

with the use of the conservation of momentum.. Is it possible? what does it exactttly mean anyways? :bugeye:

When an atom experience beta decay, will the atom become ion? This is my deduction: 1.An atom will release an electron in beta decay. 2.The electron is replaced by the electon produced from the decay of neutron. 3.However, the proton number increase by one. It still need one more electron...

In ‘Introduction to Elementary Particles’, David Griffiths makes the following two statements: a neutron decays into a proton, an electron, and an antineutrino (1.8) And later: but the following decay is not observed an antineutrino plus a neutron decay into a proton and an electron...

A neutron at rest in the laboratory spontaneously decays into a proton, an electron, and a small essentially massless particle called a neutrino. Calculate the kinetic energy of the proton and the electron in each of the following cases: a) the neutrino has no kinetic energy b) the neutrino...

There are no neutron stars within 1000s of light years that we know of but there could be chunks of one much closer. The speculation of a planet X in our solar system has been written about many times and some think the new found planetoid Sedna may be that object.However, a much smaller object...

Question: The radius of a neutron star is 750 times smaller than the Earth's radius, and its mass is 1.8 times larger than the Earth's mass. What is the escape velocity from the surface of a neutron star? (Ignore the fact that, at high speeds, one should not really use mv^2/2 for the kinetic...

I've heard this explained numerous times, most recently in my General Relativity course today, where he talked about how smaller stars will collapse into white dwarfs, while more massive ones will overcome the electron fermi gas pressure, effectively forcing the electrons into the protons, so...

What do members think of this: http://arxiv.org/abs/astro-ph/0411163 ? Garth

Hello. I'm a little unsure of how to proceed on this problem... Here it is: A 3-Gev proton flux is monitored by measuring 24Na activity induced in 25 microm (6.85 microg/cm2) aluminum foil via 27Al(p, 3pn)24Na reaction (for 3 Gev protons, cross section = 9.1 mb). Exactly 15 hr after the end...

[/color] Einstein field equation gravitational potential: \nabla^2 \phi = 4 \pi G \left( \rho + \frac{3P}{c^2} \right) General Relativity gravitational pressure: P_e = \frac{c^2}{3} \left( \frac{\nabla^2 \phi}{4 \pi G} - \rho \right) Classical Yukawa Pressure: P_y = f^2 \frac{e^{-...

isn't a neutron more massive thatn a proton?

Question: What would it take to coax a deuterium atom to give up its neutron? In terms of input energy? Would you need to hit it with an energetic electron to have a reasonable chance of disassociation? Thanks!

If neutrons stay intact and get closer together than 10^-15 metres in a neutron star, would the exchange of mesons between neutrons stop and be replaced by the exchange of gluons, and would the gluons cause an attractive or repulsive force between neutrons? A repulsive force could stop the...

How can gravity overcome the degeneracy pressure of neutrons in a neutron star? Isn't such a thing the same as violating the uncertainty principle?

Ok I've done quite some reading on neutron bombs. What exactly is the difference between them in the way they work? The way i see it now its a nuke, but not focused on heat/blast damage but radiation. How does it work? Other material used? And what isn't really clear to me is if they have...

What is the observational difference between a neutron star and a black hole? Is the evidence conclusive, or is it based on a strong reasonability argument?

An article by W Tucker and K Tucker at NASA says that neutron stars have magnetic fields. If a magnetic field is created by moving charges, and neutron stars have not net charges to move, how are the fields created?

Question--can a neutron star shed mass? Once the steller core of a massive star collapses into a neutron star, is there any known mechanism by which the neutron star can shed mass?

how is a black hole formed exactly from a neutron star or a white dwarf?? what is it? is it a star? is it defined as a matter?? and what happens when light gets sucked into it? there ought to be an increase in energy in it right? what happens to this energy?

neutron stars seem an oddity to me, they seem to have to much mass to size to be held together purly by gravity do neutrons have mutual attraction? or is space very very distorted by them?

Do strange stars exist? Apparently they are denser than neutron stars and consist of up down and strange quarks. But are they theory or reality?

Hey all, I'm a Theoretical Physics undergrad and so far I've only done one course in QM. Mainly playing with the TISE pushing wavefunctions around. Anyway after some trolling on here I've gotten to wondering, in a hydrogen atom why doesn't the electron just collapse into the nucleus? The...

I believe to remember some recent comments about the measurement of neutron magnetic moment or some other quantity of this particle, which was not very well in agreement with standard model calculations. I can not remember which measurement it was, or when. Can anyone help my poor neurons?

Okay, I am told to find the average density of a neutron star with the same mass of the sun but with a radius of only 20km. I figured this would be pretty simple so I just would divide the Sun's mass (found using Google) by the volume of the neutron star which would be (4/3)*pi*r^3 with r being...

Perhaps the proton is a spheare and the electron is a dot! Is the electron in the middle of the neutron?

A neutron star is formed when a star has burned all its nuclear fuel and begins to collapse in upon itself. It then packs roughly the mass of our Sun into a region with the same radius as that of a small city while continuing to spin at very rapid rate. Let's say you have a neutron star with a...

I heard, somewhere, that an thimble full of a neutron star would weigh on Earth many thousands of elephants. Hmmm... I suppose that this is true. But I wonder this: With all of our advanced technologies, is it possible to form such high density matter, even a thimble full, in an Earth lab?

4 dec 2003. http://www.physlink.com/News/120403PulsarGravity.cfm A discovery made with CSIRO's Parkes radio telescope in eastern Australia may have brought forward the day when astronomers will directly detect cosmic gravity waves for the first time...

Wow. Clean slate! I like the format! And I've got a question. In elementary physics, it is said that the neutron can "sorta" be thought of as a proton plus an electron together. The mass of the neutron is slightly higher than a proton, by approximately the mass of an electron; in beta...

I think it is simply the coalescence between a neutron and a K+ meson. What are your thoughts?

Some time back a friend (PhD Nuclear Engineer), told me that the energies a neutron needed to form C14 from nitrogen were (and this is where my memory gets real fuzzy) around 15 MEV. Furthermore that neither nuclear explosions or the Sun produced neutrons of this energy. The implications were...

It is a known fact that neutron stars and pulsars, remnants of super nova explosions, have very strong magnetic fields. It is said that the collapse of the core amplifies the magnetic field of the progenitor. This is due to the fact that the magnetic fields lines are drawn closer together during...

If in a beta decay when a neutron decays into a proton,electron,and a anti nutrino,that the answer to where all the particles came from is not answer by this alone?the universe started with just neutrons,then half of them decayed into protons and electrons,and started the universes...