Unexpected {open_quotes}expanding source{close_quotes} velocity scaling of light and intermediate-mass charged products from binary {sup 209}Bi+{sup 135}Xe collisions at E{sub lab}/A=28MeV

Journal Article · Sat Apr 01 04:00:00 EST 1995 · Bulletin of the American Physical Society

OSTI ID:374857

Toke, J; Baldwin, S P; Quendau, B M ^[1]

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1. and others

Light and Intermediate-Mass charged products from the reaction {sup 209}Bi+{sup 136}Xe at E{sub lab}/A = 28 MeV were measured in coincidence with massive remnants of projectile-like fragments. Emission patterns of these products are seen to exhibit signatures of two distinct mechanisms - decay of equilibrated primary partners of essentially binary collisions, and dynamical emission from an inter-fragment {open_quotes}participant{close_quotes} zone. For small degrees of kinetic-energy damping, the pattern associated with the former mechanism shows isotropic emission from the two massive reaction partners, while at higher degrees of damping, a very moderate in-versus out-of plane anisotropy becomes discernible. For a given emitter temperature, scaling of the most probable emission velocities of LCP`s and IMF`s with Coulomb barrier and product mass is seen to exhibit a peculiar off-set of approximately 1.4 cm/ns, the same for projectile-and target-like sources.

• DOE Contract Number: FG02-88ER40414; FG02-88ER40406
• OSTI ID: 374857
• Report Number(s): CONF-9304297--
• Journal Information: Bulletin of the American Physical Society, Journal Name: Bulletin of the American Physical Society Journal Issue: 2 Vol. 40; ISSN BAPSA6; ISSN 0003-0503
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
BISMUTH 209 TARGET
FRAGMENTATION
GEV RANGE 01-10
MASS SPECTRA
SCALING LAWS
VELOCITY
XENON 136 REACTIONS