[ron123456 (OP)]

I'm assuming that the electromagnetic spectrum is extended beyond gamma rays to include cosmic rays when asking this question. If cosmic rays are beyond energetic and a particle is identical to an electromagnetic wave, then why does beyond high frequency (E=hf) turn a photon into a matter particle? 

[Bored chemist]

They don't (usually)
It's careless reporting.
The cosmic rays include very high energy particles (mainly protons) and em radiation.
It's not that one turns into the other. It's just that the two forma of radiation have comparable energies, and the same source.

[ron123456 (OP)]

Thx u....I didn't even consider two forms of radiation....I thought they were all the same : particles or waves...same....Thx again....I will try to expand......

[ron123456 (OP)]

Yes, What I was trying to say is that the EM photon PARTICLE dual nature (wave/particle) was due to it's SHAPE going from a large amplitude wave train (front end) to a shorter amplitude dampened wave train (rear end) for it's associated coherence length. But what I am now trying to indicate with this discussion, is that an extremely very high frequency for a photon could result in a MATERIAL  PARTICLE proton cosmic wave as opposed to a photon SHAPE PARTICLE EM dual nature photon. i.e. a shape pulse is causing the particles dual nature of light as opposed to high frequencies causing the material (proton) dual nature of cosmic rays.