FRAGMENTATION PROCESSES IN HIGH ENERGY PARTICLE REACTIONS WITH NUCLEI

Journal Article · Sun Jan 01 04:00:00 EST 1961 · Postepy Fizyki

OSTI ID:4839549

Perfilov, N A ^[1]; Lozhkin, O V ^[2]; Shamov, V P ^[3]

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1. N. Perfilow
2. O. Lozkin
3. W. Szamow

Because the deBroglie wavelength associated with particles of 10/sup 2/ to 10/sup 4/ Mev and higher energies is significantly smaller than the size of the nucleus, it appears that the vestigation of the motion of such particles within the nucleus and their collisions with individual nucleons of the nucleus should be straightforward. However, the presence of excited states of the bound nucleons shows that there exist quantum rules for the preferred collision energies and consequently the mean free path of the fast particles in the nucleus is subject to these constraints. The result of the bombarding particles interacting with the bound nucleons gives rise to a cascade of fast protons and neutrons within the nucleus, and at higher bombarding energies, pi mesons together with residual nuclei in excited states. The magnitude of the excitation energy is limited by the properties of cascade decay within the nucleus and can range from a small part to all of the energy of the bombarding particles. The reaction products can therefore follow two general descents: particles being knocked out from the nuclei during the development of a cascade, or heavily charged particles being emitted during the decay of the excited states of the residual nuclei (fragmentation). Conditions necessary for fragmentation, fragment structure, energy and angular distribution, properties of the residual nucleus after fragment emission, and possible fragmentation mechanisms are presented in turn. (123 references). (TTT)

• Research Organization: Inst. of Radium, Academy of Sciences, USSR
• NSA Number: NSA-15-031674
• OSTI ID: 4839549
• Journal Information: Postepy Fizyki, Journal Name: Postepy Fizyki Vol. Vol: 12
• Country of Publication: Country unknown/Code not available
• Language: Polish

Related Subjects

ANGULAR DISTRIBUTION
BIBLIOGRAPHY
BOUND STATE
DECAY
ENERGY
ENERGY LEVELS
ENERGY RANGE
EXCITATION
FISSION
FISSION PRODUCTS
GEV RANGE
MEV RANGE
MOTION
NEUTRONS
NUCLEAR CASCADE
NUCLEAR MODELS
NUCLEAR REACTIONS
NUCLEI
NUCLEONS
PHYSICS
PIONS
PROTONS
QUANTUM MECHANICS
SPECTRA
TRANSIENTS