1 / 6

Some comments on paper by Tishchenko et al, PRL95

Some comments on paper by Tishchenko et al, PRL95. Information on the fission process from fission excitation function from following systems: p + U p + Bi @ 2.1 A GeV p + Au. Experimental info Tishchenko et al, PRL95. Set-up. Particle identification.

macon-fletcher
Download Presentation

Some comments on paper by Tishchenko et al, PRL95

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Some comments on paper byTishchenko et al, PRL95 Information on the fission process from fission excitation function from following systems: p + U p + Bi @ 2.1 A GeV p + Au

  2. Experimental info Tishchenko et al, PRL95 Set-up Particle identification

  3. Results Tishchenko et al, PRL95 Calculation: INCL2 + GEMINI "Prerequisite for this good agreement is that no additional transient delay time is allowed for the fission dynamics at the saddle. Fission thus seems to be decided upon very fast and early in the long deexcitation chain from the highest initial excitations ..."

  4. Pf ~ exp[2(af(E*-Bf))1/2]/exp[2(anE*)1/2]  - Bf and af/an have an important influence on Pf - af/an > 1 (e.g. Ignatyuk et al., Sov.J.Nucl.Phys. 21(1975) 612; Karpov et al., J.Phys.G 29 (2003) 2365) • Spallation reactions- Distribution of initial nuclei and excitation energies  Different nuclei (deformation, fission barrier, angular momentum...) fission at different excitation energies Tishchenko et al: System: af/an: p+U 1 p+Bi 1.017 p+Au 1.022

  5. ABRABLA calculations Tishchenko et al: Correct description of af/an indispensable for extracting information of fission process!

  6. Open questions - Do we have wrong understanding of fission dynamics? - Extraction of E*: 1. From model: E* vs. particle multiplicity 2. From experiment: particle multiplicity - High-E* part:

More Related