NDLI: New experimental studies on the quaternary fission of 233, 235U(nth, f ) and 252Cf (sf )

Content Provider	Springer Nature Link
Author	Jesinger, P. Kopatch, Yu. N. Mutterer, M. Gönnenwein, F. Gagarski, A. M. v. Kalben, J. Nesvizhevsky, V. Petrov, G. A. Trzaska, W. H. Wollersheim, H. J.
Copyright Year	2005
Abstract	Experiments have been performed for studying quaternary fission (QF) in spontaneous fission of 252Cf, on the one hand, and for the neutron-induced fission reactions 233, 235U(nth, f ), on the other hand. In this higher-multiplicity fission mode, by definition, four charged products appear in the final state. In other words, as a generalization of the ternary-fission process, not only one but two light charged particles (LCPs) are accompanying the splitting of an actinide nucleus into the customary pair of fission fragments. In the two sets of measurements, which have used quite different approaches, the yields of several QF reactions with α-particles and tritons as the LCPs have been determined and the corresponding kinetic-energy distributions of the α-particles measured. The QF process can appear in two basically different ways: i) the simultaneous creation of two LCPs in the act of fission (“true” QF) and ii) via a fast sequential decay of a single but particle-unstable LCP in common ternary fission (“pseudo” QF). Experimentally the two varieties of QF have been distinguished by exploiting the different patterns of angular correlations between the two outgoing LCPs. The experiments described in the present paper are the first to demonstrate that both types of reactions, true and pseudo QF, occur with quite comparable probabilities. As a new result also, the kinetic-energy distributions related to the two processes have been shown to be significantly different. For all QF reactions which could be explored, the yields for 252Cf(sf) were found to be roughly by an order of magnitude larger than the yields found in the 233U(nth, f ) and 235U(nth, f ) reactions. An interesting by-product has been the measurement of yields of excited LCPs which allows to deduce nuclear temperatures at scission by comparison to the respective yields in the ground state.
Starting Page	379
Ending Page	388
Page Count	10
File Format	PDF
ISSN	14346001
Journal	The European Physical Journal A - Hadrons and Nuclei
Volume Number	24
Issue Number	3
e-ISSN	1434601X
Language	English
Publisher	Società Italiana di Fisica
Publisher Date	2005-06-07
Publisher Place	Bologna
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Elementary Particles and Nuclei Nuclear Physics, Heavy Ions, Hadrons Nuclear Fusion
Content Type	Text
Resource Type	Article
Subject	Nuclear and High Energy Physics

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Collinear cluster tri-partition of 252Cf (sf) and in the 235U (nth, f ) reaction

Investigations of short half-life states from SF of 252Cf

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Studies On Particle Accompanied Fission Of 252Cf(sf) And 235U(nth,f)

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