Deexcitation of fragments produced in deeply inelastic collisions of 100 MeV /sup 16/O with /sup 27/Al

Journal Article · Mon Mar 01 04:00:00 EST 1982 · Phys. Rev. C; (United States)

DOI:https://doi.org/10.1103/PhysRevC.25.1304· OSTI ID:5421760

Young, G; Van Bibber, K A; Lazzarini, A J; Steadman, S G; Videbaek, F

A study has been made of the ..gamma..-ray deexcitation following deeply inelastic collisions between 100 MeV /sup 16/O and /sup 27/Al. An experimental apparatus including a gas proportional particle telescope, a Ge(Li) detector and three NaI(T1) detectors was used. All possible particle-..gamma.. and particle-multiple-..gamma.. coincidences for projectilelike fragments with Z> or =3 were recorded. Yields and anisotropies of several discrete transitions were measufed, as well as the mean and width of the gross multiplicity distributin as a function of detected Z and reaction inelasticity. Estimates of average ..gamma..-ray transition energy, average energy carried by ..gamma..-ray deexcitation and the degree of side feeding in observed ..gamma.. cascades were made. Observed anisotropies are consistent with considerable fragment spin alignment being present. Values of mean ..gamma..-ray multiplicity never exceed simple sticking model predictions; particle emission effects are seen to be important. The summed radiative strength ofobserved discrete line transitions is found to be less than unity, sometimes considerably so, for most deeply inelastic collisions. A short discussion is given of insights obtained on the entry state distribution for ..gamma..-ray emission and of the results of statistical model calculations of the relative yields of observed final states.

• Research Organization: Laboratory for Nuclear Science, Massachusetts Institute of Technology, Cambridge, Massachusetts
• OSTI ID: 5421760
• Journal Information: Phys. Rev. C; (United States), Journal Name: Phys. Rev. C; (United States) Vol. 25:3; ISSN PRVCA
• Country of Publication: United States
• Language: English

Related Subjects

651425* -- Nuclear Properties & Reactions
A=20-38
Experimental-- Nuclear Reactions & Scattering-- (-1987)
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ALUMINIUM 27 TARGET
CHARGED-PARTICLE REACTIONS
COINCIDENCE SPECTROMETRY
CROSS SECTIONS
DEEP INELASTIC SCATTERING
ELECTROMAGNETIC RADIATION
ENERGY RANGE
FRAGMENTATION
GAMMA RADIATION
HEAVY ION REACTIONS
INELASTIC SCATTERING
INTERACTIONS
IONIZING RADIATIONS
LEPTON-BARYON INTERACTIONS
LEPTON-HADRON INTERACTIONS
LEPTON-NUCLEON INTERACTIONS
MATHEMATICAL MODELS
MEV RANGE
MEV RANGE 10-100
MULTIPLICITY
NUCLEAR REACTIONS
OXYGEN 16 REACTIONS
PARTICLE INTERACTIONS
RADIATIONS
SCATTERING
STATISTICAL MODELS
TARGETS