Fragment emission from the mass-symmetric reactions [Formula Presented] at [Formula Presented]

E. Ramakrishnan, H. Johnston, F. Gimeno-Nogues, D. J. Rowland, R. Laforest, Y. W. Lui, S. Ferro, S. Vasal, S. J. Yennello

Research output: Contribution to journalArticlepeer-review

33 Scopus citations

Abstract

The mass-symmetric reactions [Formula Presented] were studied at a beam energy of [Formula Presented] in order to investigate the isospin dependence of fragment emission. Ratios of inclusive yields of isotopic fragments from hydrogen through nitrogen were extracted as a function of laboratory angle. A moving source analysis of the data indicates that at laboratory angles around [Formula Presented] the yield of intermediate mass fragments (IMF’s) beyond [Formula Presented] is predominantly from a midrapidity source. The angular dependence of the relative yields of isotopes beyond [Formula Presented] indicates that the IMF’s at more central angles originate from a source which is more neutron deficient than the source responsible for fragments emitted at forward angles. The charge distributions and kinetic energy spectra of the IMF’s at various laboratory angles were well reproduced by calculations employing a quantum molecular-dynamics code followed by a statistical multifragmentation model for generating fragments. The calculations indicate that the measured IMF’s originate mainly from a single source. The isotopic composition of the emitted fragments is, however, not reproduced by the same calculation. The measured isotopic and isobaric ratios indicate an emitting source that is more neutron rich in comparison to the source predicted by model calculations.

Original languageEnglish
Pages (from-to)1803-1811
Number of pages9
JournalPhysical Review C - Nuclear Physics
Volume57
Issue number4
DOIs
StatePublished - 1998

Fingerprint

Dive into the research topics of 'Fragment emission from the mass-symmetric reactions [Formula Presented] at [Formula Presented]'. Together they form a unique fingerprint.

Cite this