Recombination Definition and 64 Threads

what do we mean by ... 1. non molecular recombination 2. bi-molecular recombination and 3. auger recombination of laser... please reply if u have the ans. thank u

Homework Statement We are to assume the recombination happens at redshift z_{rec} when the number density of photons n_{\gamma}(z_{rec}) capable of ionizing hydrogen is exactly equal to the number density of baryons n_{b}(z_{rec}) . Use the measured number density of baryons, the...

Could someone explain to me what is the "reduced mass" effect on the recombination lines? My teacher told me that would explain why the wavelength I calculated seems a little bit off with the experimental result. I don't seems to find the information anywhere...Thank you in advance.

Homework Statement When radiatio was first emmited 300,000 years after the big bang during the so-called era of recombination, it was in the visible region of the spectrum. What does this data tell scientist about the temperature variant of the early universe Homework Equations The...

Hi I am just looking for the formula to calculate the baryon density of the universe at the recombination epoch. Is it a case of adding the average density of matter + radiation? but this does not take into account the recombination epoch (z=1200). I do not have a background in physics...

1.what is the link between recombination and drift current for the current flow process in a diode(1.for unbiased condition 2. for biased condition) at equilibrium. i have the feeling that both are same as i read that diffusion compensates drift at some places and at other places, diffusion...

Ok, let's say you have n-type impurities in a semiconductor. So there is an equilibrium number of electrons in the conduction and impurity bands given by the temperature and the typical semiconductor statistics. Now, you excite electrons from the valence to the conduction band. Here are my...

I know that in a semiconductor in thermal equilibrium generation and recombination are equivalent. This is obvious from continuity equation since in thermal equilibrium there is no time derivatives nor spatial gradients. However, I have read that in "stationary state" generation and...

If plasma is a collection of positive ions and electrons, why don't they recombine together and become neutral?

Sometimes we need to know the ratio of the capture section and recocmbination cross section of the electron or hole. for example, to identify the mechanism of phosphors, it's very important to know the ratio to analyze the process of luminescence. The question is how we identify the ratio, from...

I thought that the base recombination current (say in a pnp bjt) was the current caused by the electrons that come up the base wire to compensate the loss of free electrons from the recombination process in the base. But recently I read that this are actually two different currents that sum up...

We discovered that in the fungus Sordaria fimicola, a gene caused the fungus to produce normal black or mutant tan colored ascospores. Observations of crosses between normal and mutant fungi showed that 56% of the asci produced by these hybrid fungi are recombinant. This translated to a 28%...

There are many recombination processes:http://en.wikipedia.org/wiki/Recombination but specifically in cosmology the process deals with the Electron attaching itself around Nuclei to form atomic structure's? Previous to this moment, electrons were spread out at vast distances through space...

Again such a nicely orchistrated technique. Used, for instance, when you’d like to look at a mutation which is lethal to an embryo: you’ll have to induce the mutation later in life in order to actually observe the effects. What to do? Insert a gene that induces mitotic crossing-over and place...