Pound and Rebka experiment debunked by Compton effect (UPDATED with scattering probability calculation)


The Pound-Rebka experiment, produced in 1959 at Harvard University, is considered to be the last of the three classic tests of General relativity. The experiment allegedly proved the existence of gravitational redshift predicted by Einstein in his theory.

In this gravitational redshift experiment a gamma ray is send through a helium bag to an iron target and a gammaray detector, which are placed below it in air. Because the iron only absorbs the gammaray at a certain wavalength, if the wavelength changes, it will not absorb it, and it will go through it and in the detector. So if the gammaray passes through the iron target and gets detected it means that it was shifted by gravity, just as Einstein predicted. (actually it doesn't mean that)

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The reason why they used a helium bag was 'to minimise scattering'.
By scattering they reffer to Compton scattering which affects both Xrays and gammarays, which get redshifted in the process (but of course they forgot to mention this small detail !) This scattering is more likely to happen in air than in helium, which has a lower electron density and smaller chance of scattering.

Then, why did they leave the detector and metal target in open air ? The reason is to maximise scattering, right before the gammaray reached the metal target. So that it could be scattered all over it and maximise the chance that it passed through it and reached the detector, so that they could claim it was shifted by gravity. But of course it was not shifted by gravity, but by scattering (and by refraction, but let's assume there was none). Basically, it was a classic scam, just like the other two classical tests of GR.

It is known that Gammarays and Xrays are prone to scattering from the Compton effect, which redshifts them. This experiment used a bag of helium to minimise scattering, but left the detector in open air. The gammaray was therefore scattered by air and redshifted from Compton effect. Even if only helium was used, it would still have been scattered and redshifted. Because minimising scattering does not elliminate scattering.

And the explanation that the experiment was done both ways does not hold. Because the detector only detected if the X-ray went though the metal target, it didnt determine whether it was redshifted or blueshifted. And in both ways the X-ray will loose energy and go through the metal and be detected. So the experiment is instantly disproved by the Compton effect. Just as it was by the Vasile effect (which btw is directional and explains why GPS signals are blueshifted from refraction in the earth’s atmopshere; it also explains why the frequency of the signal doesnt change, as GPS inventor Ron Hatch has shown the frequency of the signal remains the same, instantly disproving Einstein’s g-shift).

And if they really wanted to minimise scattering (which causes redshifting), then why did they leave the target and detector in air, which maximised scattering (and redshifting) ? Or why didnt they do the experiment in a Vacuum to eliminate scattering completelly ? NASA has huge vacuum chambers where they test all kinds of gizmos and can fit an entire spaceship in it.

The answer is, because it can only prove Einstein wrong. And they would get no Nobel for this, since all Nobels go to people who prove him right. 

Note: in this experiment the so called 'gammaray' had an energy of 14.4 keV which coresponds to an Xray ! So in fact it was a Xray, not a gammaray (another confusion made by the two relative scientists).


UPDATE:

UPDATE: ​​​​​​  *The chance that a 14.4 keV gamma ray will scatter in 22 meters of helium is approximately 8.4% — quite low, but not negligible.*

*The probability that a 14.4 keV gamma ray will scatter in 1 meter of air is approximately 8.4% — almost identical to the 22-meter helium case, because air is much denser and more interactive.*

https://copilot.microsoft.com/shares/rrQ4sXVTx8CMLzfnZRJK7

This was calculated by AI. So the combined probability of compton scattering in both helium and air is 16.8 %. That means ¬2 out of 10 gamma 'photons' will likely be scattered and redshifted. Since the 'photons' were not fired one by one, this is more than enough to debunk this experiment.
















Xrays can scatter and refract at the same time, as ChatGPT says:
can an xray scatter and refract at the same time ?

Copilot

'Yes, X-rays can indeed scatter and refract simultaneously. When X-rays pass through a material, they can interact with the atoms in multiple ways. Scattering occurs when X-rays are deflected in different directions by the atoms, while refraction happens when X-rays change their path due to the change in speed as they enter a different medium. These interactions are fundamental to techniques like X-ray crystallography, which helps in determining the atomic structure of crystals.'

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