Direct Evidence for Multiple Sequential Fission in the Interaction ofPb208and

P.A. Gottschalk

¹

,

P. Vater

²

,

H. Becker

³

et al.

Abstract

lor series expansion does not appear to converge rapidly. For nonbackbending CHFB spectra, the expansion seems well behaved at all spins.In conclusion, a simple expression is derived which uses the angular momentum fluctuations in CHFB wave functions to obtain high-spin spectra which are approximately angular momentum projected. Although the fluctuations in J x are most important, those in J y and J z should not be omitted. The projected spectra are less compressed than the CHFB spectra and are closer to the experimental excitation energies.New differential cross section and analyzing--power data for 800-MeV j> p oi+ 12 C, 116,124 Sn inelastic scattering to the first 2 + states are presented. A distorted-wave Born-approximation analysis which utilizes collective form factors and includes deformation of the spin-orbit potential is shown to provide a reasonable description of the analyzing-power data.

Fragment correlations in the reaction 9.03 MeV/u238U+natU

“…Thus, the key problem lies in the definition of a selective criterion by which sequential and direct processes may be differentiated. It is well known that sequential reactions manifest themselves in significant resonances concerning the separation velocities of correlated fragments [4,13,14]. In the case of sequential fission the distinct reaction steps are independent from each other i.e.…”

Further Applications of Track Detectors and Some Directions for the Future

“…Brandt and co-workers [2][3][4][5][6] have used mica detectors to examine ternary and quaternary fission in heavy elements, especially uranium, induced by very heavy ions such as 84 Kr,136 Xe, or 2 3 8 U. Such heavy projectile ions register tracks of their own, even in mica; but since they are normally-incident on the mica, they are revealed as small dots, and the fragments resulting from fission can be readily picked out (see Fig.…”

Tin-accompanied and true ternary fission of 242Pu

“…This type of ternary fission has been studied extensively in refs. [15][16][17][18][19][20][21][22][23][24][25], but all its theoretical characteristics are not still well understood.…”