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Dynamical. and statistical fragment emission properties in 200 A MeV Ne-20+Ar-40 collisions

Carlén, Lars LU ; Golubev, Pavel LU ; Jakobsson, Bo LU ; Avdeichikov, Vladimir LU ; Ekstrom, C ; Friden, CJ ; Kolozhvari, A ; Westerberg, L ; Siwek, A and Aleklett, K , et al. (2006) In Nuclear Physics, Section A 764. p.15-23
Abstract
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... (More)
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. (Less)
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Contribution to journal
publication status
published
subject
keywords
NUCLEAR REACTIONS Ar-40(Ne-20, measured, multifragmentation model, Cascade plus statistical, deduced reaction mechanism features, isotopic yields and ratios, fragments charge and angular distributions, E=200 MeV/nucleon, X)
in
Nuclear Physics, Section A
volume
764
pages
15 - 23
publisher
Elsevier
external identifiers
  • wos:000234580100002
  • scopus:29744442269
ISSN
0375-9474
DOI
10.1016/j.nuclphysa.2005.09.009
language
English
LU publication?
yes
id
399c5c26-402d-4151-b1b9-9c4d2e259c45 (old id 421251)
date added to LUP
2016-04-01 15:53:19
date last changed
2021-06-23 04:38:56
@article{399c5c26-402d-4151-b1b9-9c4d2e259c45,
  abstract     = {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.},
  author       = {Carlén, Lars and Golubev, Pavel and Jakobsson, Bo and Avdeichikov, Vladimir and Ekstrom, C and Friden, CJ and Kolozhvari, A and Westerberg, L and Siwek, A and Aleklett, K and Persson, H and Rouki, C and Botvina, AS and Bondorf, JP and Pshenichnov, IA and Mishustin, IN},
  issn         = {0375-9474},
  language     = {eng},
  pages        = {15--23},
  publisher    = {Elsevier},
  series       = {Nuclear Physics, Section A},
  title        = {Dynamical. and statistical fragment emission properties in 200 A MeV Ne-20+Ar-40 collisions},
  url          = {http://dx.doi.org/10.1016/j.nuclphysa.2005.09.009},
  doi          = {10.1016/j.nuclphysa.2005.09.009},
  volume       = {764},
  year         = {2006},
}