The phrase "a collection of particles" is correct and usable in written English.
It can be used in scientific contexts, particularly in physics or chemistry, to describe a group of small, discrete units or components.
Example: "In the experiment, we observed a collection of particles that exhibited unique behaviors under different conditions."
Alternatives: "a group of particles" or "an assembly of particles".
Maybe the quantum fuzz snaps into focus when a collection of particles passes some threshold of complexity.
However, there was also undeniable evidence that light consists of a collection of particles with well-defined energies and momenta.
When a particle of one type passes through a collection of particles of the same or different type, there is a measurable chance that the particles will interact.
By the end of the 19th century, the battle over the nature of light as a wave or a collection of particles seemed over.
Figure 4 shows a collection of particles that have been generated in PFC.
Smoke is taken as a collection of particles with size described by a certain distribution function.
Yet, if light is considered a collection of particle-like photons, each can pass only through one slit or the other.
According to quantum theory, electromagnetic radiation does not always consist of continuous waves; instead it must be viewed under some circumstances as a collection of particle-like photons, the energy and momentum of each being directly proportional to its frequency (or inversely proportional to its wavelength, the photons still possessing some wavelike characteristics).
A model of hydride formation and dissolution has been proposed for a single spherical particle and for a collection of such particles with a given size distribution.
The N samples (particles) are drawn from a proposed distribution p X k i X k i - 1, Y k, i = 1,2,…,N and assigned with weights w X k i. Suppose that at a previous time instance k – 1, we have a particle based representation of the density, that is, we have a collection of N particles and their corresponding weights X k - 1 i, w X k - 1 i i = 1 N.
The lone exception -- theoretically, at least -- should occur when a collection of ordinary particles becomes so hot and dense that their innards can spill out and form a kind of quark soup, the quark-gluon plasma.
