Nuclear physics applications of "pushing photons" to target by laser, and its hypothetical CPT analogue: "pulling photons" from target?

Especially free electron lasers, wigglers/undulators ( https://en.wikipedia.org/wiki/Free-electron_laser ) can produce very high intensity beams of gammas in a chosen energy spectrum.

It could be used "to shake" nucleus to stimulate some transitions - maybe speeding up some decay processes, reaching some nucleus excited states (e.g. https://en.wikipedia.org/wiki/Hafnium_controversy ) ...

Could it be useful for some nuclear fusion/fission applications?

E.g. shooting hydrogen with 782keV gammas - could it help with proton + electron + 782keV -> neutron + nu?

Let me start a general thread for existing and new ideas for potential applications of such possibilities.

Also, while in the above laser "pushes photons" to the target, CPT theorem suggests there might be also accessible its CPT analogue: "pulling photons" from the target: Ring laser might allow for revolutionary new effect suggested by CPT symmetry (I search for access/collaboration)

In diagram below, looking at it from perspective after CPT transform would make the absorption equation apply to the target on the left, what means applying emission equation to it in standard perspective (no CPT).

If possible, e.g. when there is a low probability nuclear transition with characteristic gammas, we might be able to "pull them" with free electron laser - hopefully increasing probability of this transition.

Any ideas for nuclear physics applications of such hypothetical possibility?

"Negative radiation pressure" as this "photon pulling": https://scholar.google.pl/scho…gative+radiation+pressure

For example maybe stimulated proton decay - ultimate energy source: complete matter -> energy transition, ~100x energy density than fusion from any matter. Violation of baryon number is required e.g. by baryogenesis, Hawking radiation. They cannot observe it in room temperature water, but maybe it is a matter of proper conditions, like "pulling photons" of some characteristic energy (e.g. 511keV?) by some powerful free electron laser?

It probably is doable, but might require multiple lasers for some precise sequence of photon pushing and pulling - optimization of which would require nearly perfect model of proton (as topological defect?) to swing it out of a very deep local(?) energy minimum ... probably a matter of a few decades.

ps. List of free electron lasers (2017, up to ~40keV photons): http://accelconf.web.cern.ch/f…JACoW-FEL2017-MOP066.html

Pulling with photons is done e.g. by https://en.wikipedia.org/wiki/Optical_tweezers

EM radiation pressure is <E x H>/c ( https://en.wikipedia.org/wiki/…f_an_electromagnetic_wave ) - doesn't have to be positive.

There are not many free electron lasers now, but maybe the successor of NIF could be based on them - searching for stimulated proton decay ...

E.g. by just scanning through MeV-GeV energies with multiple photon pulling + pushing for various energies - hopefully to swing proton out of very deep local energy minimum, searching for settings with some increased activity ...

If CPT symmetry remains valid in macroscopic physics, change from "photon pushing" to "photon pulling" is just a matter of placing the target behind such asymmetric light source: in perspective after CPT symmetry it would be target in front for photon pushing, what in standard perspective (no CPT) means photon pulling (stimulated emission from target):

As a few persons here work on models of particles e.g. Wyttenbach , do you think baryon number is always conserved?

It is violated e.g. in baryogenesis, Hawking radiation ... electric charge is ultimately conserved due to Gauss law, but there is no Gauss law for baryon number.

If your model allows for baryon number violation, maybe you could think of stimulated proton decay (>100x energy density than fusion) - how to swing proton out of local minimum in your model?

In the model I am considering (introduction: https://community.wolfram.com/groups/-/m/t/2856493 ), the simplest knots resemble baryons - enforcing hedgehog inside corresponding to electric charge, proton can just enclose it while neutron has to compensate it - what is costly, explaining why neutron is heavier.

Stimulated proton decay here would be unknotting this knot - shaking it to make 2 vortexes goes through each other - tough calculations, but optimization of such shaking, photon pushing/pulling seems doable here.

Could you point some specific article? Briefly looking at Leif Holmlid articles, I see mostly atomic physics level: https://scholar.google.com/citations?user=7eoqJf8AAAAJ&hl=en

Above reactions seem testable - were they verified?

If possible, stimulated proton decay could give ~100x energy density than fusion from any matter ...

ps. "negative radiation pressure" - like this "photon pulling": https://scholar.google.pl/scho…gative+radiation+pressure

While we agree stimulated proton decay would be ultimate energy source, I highly doubt it could be achieved with low energy reactions.

It might be already happening e.g. in colliders like LHC - I have talked with some specialists, but they told the current experiments cannot confirm nor deny.

Another place for proton decay I would suspect are cores of neutron stars - close conditions to of Hawking radiation violating baryon number ... e.g. "Bizarre object 10 million times brighter than the sun defies physics, NASA says", 100x or more higher intensities they can explain - "proton burning" could explain, but again it seems it is not even considered by the mainstream.

Naively it seems simpler than fusion - we don't need to make two objects meet against Coulomb, only "swing out" proton of local energy minimum ... but it would be extremely deep local minimum (if finite).

For hypothetical practical "stimulated proton decay power station" in a few decades, I imaging a few free electron lasers pulling/pushing photons in some extremely precise sequence optimized based on models of protons.

Probably there are various ways to get "negative photon pressure", "photon pulling" - free electron laser, synchrotron, ring laser above ... in the negative radiation pressure articles they want to get it for mechanical waves on graphene.

ps. Thinking about fusion application, maybe it is worth to shoot hydrogen with 782keV gammas - could it help with proton + electron +782keV -> neutron + nu?

I see this article is about annihilation, which is great but requires antimatter - how to get it in large amounts?

Proton decay, if possible and could be stimulated, would lead to the same energy density as annihilation (>100x of fusion) from matter alone.

Returning to free electron lasers, it seems the maximal energy of produced photons is ~20keV, proposed are for ~40 keV: https://accelconf.web.cern.ch/fel2017/papers/mop066.pdf

For nuclear transition with free electron lasers there are some papers about 14.4 keV Mössbauer Fe57: https://journals.aps.org/prres…PhysRevResearch.4.L032007

If reaching e.g. 782keV, it should allow to produce large amounts of free neutrons (p + e + 782keV -> n + nu), then maybe fusion with positive energy balance (?)