Study of transfer and breakup reactions with the plastic box

Technical Report · Wed Aug 01 00:00:00 EDT 1984

DOI:https://doi.org/10.2172/6332661· OSTI ID:6332661

Stokstad, R G; Albiston, C R; Bantel, M; Chan, Y; Countryman, P J; Gazes, S; Harvey, B G; Homeyer, H; Murphy, M J; Tserruya, I

The study of transfer reactions with heavy-ion projectiles is complicated by the frequent presence of three or more nuclei in the final state. One prolific source of three-body reactions is the production of a primary ejectile in an excited state above a particle threshold. A subset of transfer reactions, viz., those producing ejectiles in bound states, can be identified experimentally. This has been accomplished with a 4..pi.. detector constructed of one-millimeter-thick scintillator paddles of dimension 20 cm x 20 cm. The paddles are arranged in the form of a cube centered around the target with small entrance and exit apertures for the beam and the projectile-like fragments, (PLF). The detection of a light particle (e.g., a proton or an alpha particle) in coincidence with a PLF indicates a breakup reaction. The absence of any such coincidence indicates a reaction in which all the charge lost by the projectile was transferred to the target. With this technique we have studied the transfer and breakup reactions induced by 220 and 341 MeV /sup 20/Ne ions on a gold target. Ejectiles from Li to Ne have been measured at several scattering angles. The absolute cross sections, angular distributions and energy spectra for the transfer and breakup reactions are presented. Relatively large cross sections are observed for the complete transfer of up to seven units of charge (i.e., a nitrogen nucleus). The gross features and trends in the energy spectra for transfer and breakup reactions are similar. However, small differences, in particular for the widths of the energy spectra, are significant. 20 references.

• Research Organization: Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); Stanford Univ., CA (USA). Dept. of Physics; Hahn-Meitner-Institut fuer Kernforschung Berlin G.m.b.H. (Germany, F.R.). Abt. Strahlenphysik
• DOE Contract Number: AM03-76SF00326; AC03-76SF00098
• OSTI ID: 6332661
• Report Number(s): LBL-18240; CONF-840882-2; ON: DE85000626
• Resource Relation: Conference: International symposium on heavy ion physics, Mt. Fuji, Japan, 27 Aug 1984; Other Information: Portions are illegible in microfiche products
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
GOLD 197 TARGET
NEON 20 REACTIONS
HEAVY ION REACTIONS
BREAKUP REACTIONS
TRANSFER REACTIONS
PLASTIC SCINTILLATION DETECTORS
ACCELERATOR FACILITIES
ANGULAR DISTRIBUTION
DIFFERENTIAL CROSS SECTIONS
ENERGY SPECTRA
EXPERIMENTAL DATA
FOUR-PI COUNTING
MEV RANGE 100-1000
NUCLEAR FRAGMENTS
CHARGED-PARTICLE REACTIONS
COUNTING TECHNIQUES
CROSS SECTIONS
DATA
DIRECT REACTIONS
DISTRIBUTION
ENERGY RANGE
INFORMATION
MEASURING INSTRUMENTS
MEV RANGE
NUCLEAR REACTIONS
NUMERICAL DATA
RADIATION DETECTORS
SCINTILLATION COUNTERS
SOLID SCINTILLATION DETECTORS
SPECTRA
TARGETS
651925* - Nuclear Properties & Reactions
A=190-219
Experimental- Nuclear Reactions & Scattering- (-1987)
651100 - Nuclear Physics- Experimental Techniques- (1980-)
440101 - Radiation Instrumentation- General Detectors or Monitors & Radiometric Instruments