Light fragments from sup 14 N+Ag collisions at 35 MeV/nucleon

Journal Article · Sat Sep 01 04:00:00 EDT 1990 · Physical Review, C (Nuclear Physics); (USA)

DOI:https://doi.org/10.1103/PhysRevC.42.1029· OSTI ID:6363150

Deak, F; Kiss, A ^[1]; Seres, Z ^[2]; Galonsky, A; Heilbronn, L; Schelin, H R ^[3]

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1. Department of Atomic Physics, Eoetvoes University, Puskin utca 5-7, H-1088 Budapest (Hungary)
2. Central Research Institute for Physics, Budapest (Hungary)
3. National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, MI (USA) Department of Physics Astronomy, Michigan State University, East Lansing, MI (USA)

Velocity spectra of thirteen different fragment species from {sup 6}Li to {sup 15}N at seven angles from 15{degree} to 83{degree} and of neutrons in coincidence with them have been determined from {sup 14}N+Ag collisions at 35 MeV/nucleon. The velocity spectra of the fragments show contributions from quasielastic and deep-inelastic processes. The quasielastic part of each spectrum was fitted with an empirical model. For each fragment species, the deep-inelastic part at each of the seven angles was simultaneously fitted with a single moving source. The parameters {ital T} for source temperature and {ital E}/{ital A}, corresponding to source velocity, were approximately independent of fragment species and had average values of 12.8 and 3.9 MeV, respectively. Many coincidence neutron spectra were created off line by selecting gates having various fragment species, angles, and velocity intervals. The neutron spectra at seven or eight angles with a given gate were simultaneously fitted with two moving sources. The source parameters had little dependence on the gate. The average values of {ital T} and {ital E}/{ital A} for one source, an intermediate rapidity source, were 10.4 MeV and 10.7 MeV/nucleon, respectively. The other source, a slowly moving targetlike source, had {ital T} and {ital E}/{ital A} in the ranges 2.0--3.6 MeV and 0.1--0.3 MeV/nucleon, respectively. Since neither of these neutron sources has the velocity of the fragment source, the actual origin of the deep-inelastic fragment may be a nonequilibrium process such as the stripping-pickup process.

• OSTI ID: 6363150
• Journal Information: Physical Review, C (Nuclear Physics); (USA), Journal Name: Physical Review, C (Nuclear Physics); (USA) Vol. 42:3; ISSN 0556-2813; ISSN PRVCA
• Country of Publication: United States
• Language: English

Related Subjects

651720* -- Nuclear Properties & Reactions
A=90-149
Experimental
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
BARYONS
CHARGED-PARTICLE REACTIONS
COINCIDENCE SPECTROMETRY
DEEP INELASTIC HEAVY ION REACTIONS
DIRECT REACTIONS
ELEMENTARY PARTICLES
ELEMENTS
ENERGY RANGE
FERMIONS
HADRONS
HEAVY ION REACTIONS
METALS
MEV RANGE
MEV RANGE 100-1000
NEUTRON SPECTRA
NEUTRONS
NITROGEN 14 REACTIONS
NUCLEAR FRAGMENTATION
NUCLEAR FRAGMENTS
NUCLEAR REACTIONS
NUCLEONS
QUASI-ELASTIC SCATTERING
QUASI-FREE REACTIONS
SCATTERING
SILVER
SPECTRA
TRANSITION ELEMENTS
VELOCITY