TY - JOUR
T1 - Dynamical. and statistical fragment emission properties in 200 A MeV Ne-20+Ar-40 collisions
AU - Carlén, Lars
AU - Golubev, Pavel
AU - Jakobsson, Bo
AU - Avdeichikov, Vladimir
AU - Ekstrom, C
AU - Friden, CJ
AU - Kolozhvari, A
AU - Westerberg, L
AU - Siwek, A
AU - Aleklett, K
AU - Persson, H
AU - Rouki, C
AU - Botvina, AS
AU - Bondorf, JP
AU - Pshenichnov, IA
AU - Mishustin, IN
PY - 2006
Y1 - 2006
N2 - Dynamical and statistical fragment emission processes in 200 A MeV Ne-20 + Ar-40 collisions are well probed by measurements of charge (Z), mass (A) and momentum vector ((p) over right arrow) of all fragments in large parts of the available momentum space. We present such data obtained at the cluster-jet target of the CELSIUS storage ring, for the first time with an internal, ultra-high vacuum (UHV) compatible detector system (CHICSi). Energy and angular dependence in Z and A distributions are not reproduced by a single-step model, e.g., those based on molecular dynamics (MD), but require a complete three-step model. We use here the intranuclear cascade+ statistical multifragmentation + secondary evaporation model (CFEM). The angular dependence of isobaric ratios, like He-6/Li-6 at low emission velocities and temperatures extracted from isotopic (double) ratios, do exhibit differences, even from this model. These differences, which call for adjustment of model parameters, are discussed. (c) 2005 Elsevier B.V. All rights reserved.
AB - Dynamical and statistical fragment emission processes in 200 A MeV Ne-20 + Ar-40 collisions are well probed by measurements of charge (Z), mass (A) and momentum vector ((p) over right arrow) of all fragments in large parts of the available momentum space. We present such data obtained at the cluster-jet target of the CELSIUS storage ring, for the first time with an internal, ultra-high vacuum (UHV) compatible detector system (CHICSi). Energy and angular dependence in Z and A distributions are not reproduced by a single-step model, e.g., those based on molecular dynamics (MD), but require a complete three-step model. We use here the intranuclear cascade+ statistical multifragmentation + secondary evaporation model (CFEM). The angular dependence of isobaric ratios, like He-6/Li-6 at low emission velocities and temperatures extracted from isotopic (double) ratios, do exhibit differences, even from this model. These differences, which call for adjustment of model parameters, are discussed. (c) 2005 Elsevier B.V. All rights reserved.
KW - NUCLEAR REACTIONS Ar-40(Ne-20
KW - measured
KW - multifragmentation model
KW - Cascade plus statistical
KW - deduced reaction mechanism features
KW - isotopic yields and ratios
KW - fragments charge and angular distributions
KW - E=200 MeV/nucleon
KW - X)
UR - https://www.scopus.com/pages/publications/29744442269
U2 - 10.1016/j.nuclphysa.2005.09.009
DO - 10.1016/j.nuclphysa.2005.09.009
M3 - Article
SN - 0375-9474
VL - 764
SP - 15
EP - 23
JO - Nuclear Physics, Section A
JF - Nuclear Physics, Section A
ER -