Questions tagged [mass-spectrometry]

The tag has no usage guidance.

Filter by
Sorted by
Tagged with
1
vote
0answers
13 views

What is the physical meaning of a molecular fragment having two appearance energies?

Appearance energies are particularly import when it comes down to mass spectrometers that use electron impact bombardment. They typically denote the quantum energy value for fragmenting the molecule ...
0
votes
0answers
18 views

Mass spectrometry

I have a question concering mass spectrometry, more specifically the quadrupole mass analyser. As I understand it only some ions will be able to pass through the rods and the rest will collide with ...
0
votes
0answers
33 views

Ion separation is effected by static or dynamic electric or magnetic fields?

My textbook says the following: The basic principle of mass spectrometry (MS) is to generate ions from either inorganic or organic compounds by any suitable method, to separate these ions by their ...
0
votes
0answers
27 views

Is there a mass spectrometer software that can measure the mass of a hydrogen atom [duplicate]

For a school project I need to measure the mass of a hydrogen atom either as a lab experiment or with a computer simulation. Since I don't have the appropriate equipment for the experiment, does ...
0
votes
0answers
51 views

Is there a mass spectrometer software that can measure the mass of a proton

I spent a lot of hours looking for mass spectrometer software (or Cathode-ray simulator) that can measure the mass of a proton or any sub atomic particle. Until now I only found software that work on ...
2
votes
1answer
115 views

Atomic Structure History

I was reading a book about atomic structure history (Chemistry in Context by Graham Jill and John Holman), and got interested in few points which is not explained in the book. "Calculations based on ...
2
votes
2answers
241 views

Why didn't accelerator mass spectrometry greatly improve the accuracy of carbon dating?

My understanding of the limitation of radiometric dating is that background radiation swamps the radiation from C14 once the remaining atoms get few enough in number. Accelerator mass spectrometry ...
4
votes
1answer
761 views

Velocity distribution in ion source (electron bombardment) for Bainbridge mass spectrometer

Consider the following schematics of a Bainbridge mass spectrometer (Source: http://www.schoolphysics.co.uk/age16-19/Atomic%20physics/Atomic%20structure%20and%20ions/text/Mass_spectrometer/images/1....
0
votes
0answers
356 views

Looking for raw interferogram data / raw FID data from FT-IR / FT-NIR / FT-NMR

I'm trying to get my hands on some raw interferogram data / raw FID data from an FT-IR / FT-NIR / FT-NMR so I can run some tests using FFT with it (it needs to be real data). Here's a picture below of ...
13
votes
1answer
197 views

Can a discrete dynode mass spec detector get “tired?”

In an electron multiplier (discrete dynode detector), one electron triggers the release of more electrons in a cascade. Is it possible that a "large" number of electrons hitting the detector can ...
11
votes
2answers
5k views

Is ultradense deuterium real?

I've found several articles discussing experimental evidence of a deuterium state of densities over $140 \textrm{ kg}/\textrm{cm}^3$: F. Winterberg. Ultradense Deuterium. arXiv. Shahriar Badiei, ...
4
votes
1answer
91 views

Experimental limits on anisotropies in the $e/m_{e}$ ratio

Currently the charge-to-mass ratio of the electron is known to 10 orders of magnitude. However, i'm curious if: Are there any experiments trying to bound the anisotropy of this ratio for different ...
3
votes
1answer
303 views

How small of a depletion signal can the best modern mass spectrometers detect?

So I know the answer to this question varies widely across mass spec techniques, masses, and, of course, budgets, but my question is about the best case scenario for all of these variables (although I'...