Christmas development of the BME event generator

Christmas developmentof the BME event generator

F. Cerutti

in collaboration with

A. Mairani (INFN-HIT),A. Ferrari, F. Sommerer

FLUKA user meeting CERN January 31st 2007

FLUKA user meetingFrancesco Cerutti CERN, January 31st 2008

BME – The interfaced code


BME –Peripheral collisions


“Closed” issue on the peripheral collision side !

quite significant underestimation of production cross sectionfor isotopes close to projectile or target

12C+12C @ 86 MeV/n(11C) ~ 1 mb


Implemented developments

relaxation of the geometrical radius

PL, TL chosen according to

[d/dcm ~ exp(-kcm)

pPL, pTL chosen according to

a uniform energy loss distribution over a given interval


Results [I]12C+12C @ 86 MeV/nBME(11C) = 81 mb

RQMD(11C) = 215 mb


Benchmarking [I]12C+12C @ 86 MeV/n

exp data from H. Ryde, Physica Scripta Vol. T5, 114-117, 1983

2o < LAB < 22o TLAB > 10 MeV/n




RQMD angular distribution


Benchmarking [II]12C+9Be @ 86 MeV/n




Results [II]


BME – The database for the pre-equilibrium emissions

16O + 6Li, 8Li, 8B, 10B, 12C, 14N, 16O, 19F, 20Ne, 24Mg, 27Al

12C + 8Li, 8B, 12C, 27Al

@ 12, 30, 50, 70, 100 MeV/n


Undertaken issues on the CF side

(extension of the database)

evidence of too hard (pre-equilibrium) neutron spectraat high incident energies

extrapolation of parametersfor systems not included in the database


Treatment of transfer reactions

deep overlap and full inclusion cases addressed

This way events ofCOMPLETE FUSION because ofan impact parameter too lowhave been avoided

for 16O+197Au @ 94 MeV/nCF was pushed from 4%R (estimated) to

45%R

excitation energy sharing


Complete fusion for wild systems

total multiplicity @ 12, 30, 50, 70, 100 MeV/n

angular distributions

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Christmas development of the BME event generator