As an adjective atomic

is atomic.

As a noun quasifission is

(physics) partial fusion followed by fission of very large atomic nuclei]] as a possible means of generating neutron[[rich|-rich isotopes.

As nouns the difference between neutron and quasifission

is that neutron is neutron while quasifission is (physics) partial fusion followed by fission of very large atomic nuclei]] as a possible means of generating neutron[[rich|-rich isotopes.

As nouns the difference between isotope and quasifission

is that isotope is while quasifission is (physics) partial fusion followed by fission of very large atomic nuclei]] as a possible means of generating neutron[[rich|-rich isotopes.

As adjectives the difference between collimated and recollimated

is that collimated is composed of rays that are parallel, thus having a wavefront that is planar while recollimated is collimated again, following broadening.

As a verb collimated

is past tense of collimate.

As a verb broadening

is .

As a noun broadening

is the act of becoming broader.

As an adjective recollimated is

(physics|of a beam) collimated again, following broadening.

As nouns the difference between region and pseudosurface

is that region is region; area while pseudosurface is (physics) an extended region, often parallel to a surface, that in some way acts as if it were a surface.

As nouns the difference between parallel and pseudosurface

is that parallel is one of a set of parallel lines while pseudosurface is (physics) an extended region, often parallel to a surface, that in some way acts as if it were a surface.

As an adjective parallel

is equally distant from one another at all points.

As an adverb parallel

is with a parallel relationship.

As a verb parallel

is to construct or place something parallel to something else.

As a verb surface

is .

As a noun pseudosurface is

(physics) an extended region, often parallel to a surface, that in some way acts as if it were a surface.

As nouns the difference between fusion and quasifission

is that fusion is fusion while quasifission is (physics) partial fusion followed by fission of very large atomic nuclei]] as a possible means of generating neutron[[rich|-rich isotopes.

In physics|lang=en terms the difference between fission and quasifission

is that fission is (physics) the process of splitting the nucleus of an atom into smaller particles; nuclear fission while quasifission is (physics) partial fusion followed by fission of very large atomic nuclei]] as a possible means of generating neutron[[rich|-rich isotopes.

As nouns the difference between fission and quasifission

is that fission is the process whereby one item splits to become two while quasifission is (physics) partial fusion followed by fission of very large atomic nuclei]] as a possible means of generating neutron[[rich|-rich isotopes.

As a verb fission

is to cause to undergo fission.