Ionization Definition and 289 Threads

Basically, I don't understand how they got x=L/2 and x=r paths of T_in and T_out. Below is elaboration. I don't understand the choice of paths for incoming and outgoing photons in the solution for c). The solution put incoming path to x=L―/2, while outgoing x=r. As I interpret it, Tin is the...

Does anyone know where I can find all the ionization energies of Germanium? hbcp.chemnetbase.com shows only the first 5 and winter.group.shef.ac.uk only the first 21. I need them because I would like to reproduce a plot of the ionization of Germanium in a plasma. Since this plot exists I assume...

How does spin-orbit splitting also affect this or anomalous zeeman effect or decrease in spin when you move from Nitrogen to Oxygen? Bad Teacher: The addition of the second electron into an already occupied orbital introduces repulsion between the electrons, thus it is easier to remove. that is...

I need help to develop an mcnp geometry for input and output of Percent depth dose.

I mean by accelerating electrons and ions for energy levels in atom

Hello! I am building a velocity map imagining (basically measuring the energy and angular distributions of electrons upon ionization). To test the setup I decided the use Yb (as we have an oven in our lab) and given the lasers we have, I am using a transition around 266 nm and then ionize it...

Pocket dosimeter consists of a small ionization chamber, if a person having pocket dosimeter moving in a radiation environment, how the dose received by the man is equivalent to the dose showing on pocket dosimeter although the exposed area of a man is quite larger than the dosimeter ?

Hi, is it possible to ionise a solid, so that it has no electrons left? Josiah

Lets say that i have i mole of tungsten atoms. They are all ionized, only one electron is removed from each atom. If i accelerate this mole of tungsten atoms through one electron volt, i would get 96.48 kj. If the mole of tungsten was doubly ionized, two electrons removed from each atom, and...

Let's think now about the energy to create a KF molecule from neutral atoms. First we need to ionize both K and F: K loses an electron and F gains an electron. Then we have to bring the ions together. The first ionization energy of K is 418 kJ/mol and for F is 1681 kJ/mol. The electron...

Hello! I am trying to make some predictions for an experiment in which we have a first ##E_2## transition in an atom driven by a laser, and then we have a second laser that is ionizing the molecule only if the first laser was resonant (i.e. if the atom was excited). For the purpose of the...

Can someone please tell me what is the chemistry textbook that available about degree of ionization? I use Chemistry the Central Science textbook by Brown. Unfortunately I couldn't find about degree of ionization in this textbook. Degree of ionization is studied in undergraduate of Mechanical...

Hello, Firstly I am not sure of understanding the problem, I believe that this reduction is related to a high density plasma where the free electrons are very close to the ions and so the ions cannot be considered as separate bodies... I also believe it affects the ground energy state of...

hi guys i saw this experiment in an old book that uses the gas vacuum tube "thyratron" for determining the hydrogen ionization energy , the idea i guess is straight forward : we set the filament current to a specific value then the electrons starts to emit from the cathode traveling its way to...

There is a large increase in ionization energy when an electron is removed from a p orbital versus when it is removed from a s orbital (and likewise when it is removed from the valence shell and from the inner shells). Why is there a smaller increase when successive electrons are removed from...

I got the right answers but have 2 questions. My first attempt was to use Equation 2 and solve for r then use Equation 3 and solve for n. My reasoning was that the photon needed to overcome the potential energy of the atom to release the electron. This gave me n =3.44. Why was I wrong? Then...

It will try to produce a neutral atom but it depends on the amount of energy that electron is shot at the atom, if it is great enough energy for ionization it will produce cation, If it is not enough for ionization it will make a neutral atom or anion, I think.

The first ionization energy decreases between group 5 and group 6 due to the repulsion between the electrons in the p orbital. Although I understand that the effective nuclear charge increases between group 1 and group 2 elements, why isn't this the case between group 1 and group 2 elements...

Hi, The ionization energy is defined as the minimum amount of energy required to remove the most loosely bound electron, the valence electron, of an isolated neutral gaseous atom. Our physics teacher also told us while explaining this concept in the context of energy levels, that it is equal...

Plugging-in the above data, I am getting n2/n1 to be of the order of 10^25 ! I know that the percentage is out of 100.

Hi there, I'm sure this is glaringly obvious for chem-buffs but just been coming across some Henderson-Hasselbach type questions in Basic scenarios where we're looking at basic solutions where calculating involves a [BH]/ as opposed to the regular [AH]/[A-]. I've come across wording in what...

I am confused with the Kvp and Kep. I know that In the x-ray tube, after heating the filament and the electron cloud if formed, then the step-up transformer is going to increase the voltage and reduce the current to produce a high potential difference to that electrons will accelerate from the...

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Is there a radiation method for efficienctly ionizing every electron off of atoms to produce strictly protons and neutrons Without generating tremendous heat?

i am trying to calculate the first ionization energy for lithium with this equation but it seems to work only with hydrogen ? i put nf = infinity and ni =2 ,and z = 3 for lithium and it gives about 30 ev not 5.39172 ev which is the value for lithium : i will appreciate any help in this

1) I know that the binding energy is the energy that holds a nucleus together ( which equals to the mass defect E = mc2 ). But what does it mean when we are talking about binding energy of an electron ( eg. binding energy = -Z2R/n2 ? ). Some website saying that " binding energy = - ionization...

Hi, I am interested in plasma physics. I understand that once a gas (say Argon) is ionized, light (electromagnetic radiation) is emitted. This is clearly observable from the coloured glow of the gas when it is in a plasma state. Where does the energy for these electromagnetic rays come from? Is...

Hi, I'm wondering if there any exists a Monte Carlo free code that can simulate dissociative ionization, per example a beam of protons on water, and then track the fragments (from water) and their energy. Thanks in advance!

Saha-Boltzmann equation describes the ratio of number densities between any two consecutive ionization states and its product with the number electron density i.e. $$n_e\frac{n_{i+1}}{n_{i}}$$ Here, ##n_e## is the electron number density, ##n_{i+1}## is the number density in ##i+1## ionization...

John Baez says here http://math.ucr.edu/home/baez/end.html What is the technical term for this process? Is there some online stuff that explains this in more detail?

Homework Statement In He-like Carbon, C V, the excitation energy of 1s3s ##^1S## is 2851180 ##cm^-1## and for 1s4s ##^1S## it is 2988246 ##cm^-1##. Estimate the ionization energy. Compare with the value in the NIST database! Homework Equations ##E_{io}= T + E_{excitation}, ## ##T =...

hi guys i recently had built a HV power supply out of an old Flyback transformer i had laying around , i think it produces about 10KV ~ 15KV not very sure but it could arc at about ( 6mm in air ) , and as you can see i tried to connect it to a 15W smal light bulb ( the positive terminal...

I recently read about a beta decay isotope (Rhenium-187),whose half life was changed from 42 X 109 years to 33 years, just by stripping the nucleus of all it's electrons. Why does this allow for a faster decay, and does this apply to all beta decay nuclei, or just Rhenium 187?

Hi...Here is a GIF of some electrical explosions that I recorded with my full spectrum camera. These power lines supply power to a neighboring county so it didn't affect my area. In the upper atmosphere we see something similar in Transient Luminous Events (TLEs). In the case of the blue in Blue...

Although I have seen values such as 3 kV/mm for the dielectric breakdown of air, I was curious if there was an analytical or semi-analytical model of the ionization of say N2 under a uniform electric field. I am aware of Peek's law. Am I correct in assuming it is empirical? How might one connect...

Homework Statement [/B] Calculate the rate of ionization of a hydrogen atom in the 2p state in a monochromatic external electric field, averaged over the component of angular momentum in the direction of the field. Ignore the spin of the particles. In this case we can write...

Just wondering if there's any accurate method for direct measurement of the ionization energy of atomic Hydrogen and/or Deuterium ? There's lots of measurements on transitions between various hydrogen/deuterium energy levels but not (it seems) to the limit where n = infinity. Alternatively...

Homework Statement In hydrogen atom ionization H→p+e show that ##μ_H=μ_p+μ_r## Homework Equations G=μN (N is the number of particles) The Attempt at a Solution (1) I think the question should say "Find chemical potential relation AT EQUILIBRIUM", don't you think? (2) My professor said that...

Is there a way to look at mass spectra and determine the method of ionization? I.e., whether it's electrospray, FAB, MALDI, etc.

So i have been looking at a 1microsecond pulsed 250milliwatt 980nm laser. I watched a video where a guy outputed 50millijoules at 5 nanoseconds and achieved air breakdown. I am wondering since maybe mine is higher energy it will do the same or i need faster pulses?

A double covalent bond of nitrogen (N2) is 15.58eV Now let's go into a example. if i have a laser that is 477nm and i do 1240/477nm then i get 2.6eV per photon. Now if i do (15.58eV / 2.6eV) it equals ~6 photons. Now to figure out how many Joules are required for 1 photon I do (6.626*10^-34S *...

Hi! Does it exist cables using ionized gas / plasma as the conductor available to buy? Thanks in advance!

Homework Statement What is the third ionization energy of Li in its ground state? A. 4.91 E-18 J B. 6.54 E-18 J C. 7.79 E-18 J D. 9.20 E-18 J E. 1.96 E-17 J Homework Equations Maybe: EN=-(2.18E-18)(Z2/N2) The Attempt at a Solution Plugging in values doesn't give me any of the answers. At...

Homework Statement Here's the pic of the problem and my work The Attempt at a Solution I'm not sure how I'm suppose to calculate the energy change? Did i do it correctly in the picture? For number 9, I just added IE1 and IE2 and subtracted EA1 to get a total of 3200.3. This means that the...

Hi! I wonder since some time why ionization energies are not equal to binding energies. For instance, take the case of aluminum in the following configuration [Ne]3s²3p Ionization energy ~ 6 eV Binding energy ~ 5 eV Where does this difference come from ? Thanks in advance

So I was playing with periodic table and discovered Cu's 29th ionization energy(cu with no electron) is 1116105 KJ/mole . Then i searched on google to convert to MeV which is 6.9661798e+21 , then I thought that one uranium 235 produce 200mev so to make that you would need around 3.5e+19...

Homework Statement A molecule of nitrogen has a diameter of 3.2 x 10-8 cm and can be ionized upon absorbing 14.5 eV. what potential must be applied to a parallel-plate ion chamber operating at a pressure of 50mm of mercury, and with an electrode separation of 3.0 cm, in order to produce...

Here is the Wikipedia page on electrode potentials. Here's how I'm reading it, which makes no sense: If a singly ionized atom of strontium donates an electron to the hydrogen in the standard hydrogen electrode, this will emit 4.101 eV of heat (395.68 kJ/mol). If cesium is used, there will be...

1. Homework Statement A simple model atom is composed of a point-like nucleus with charge ##+Q## and an electron charge distribution $$ \rho(\vec{r})=-\dfrac{\left|Q\right|}{\pi a^2 r}exp(-2r/a) $$ where ##a## is a constant. Show that the ionization energy (the energy to remove the electron to...