Τίτλος:
ROLE OF QUASIPROJECTILE ISOSPIN ASYMMETRY IN NUCLEAR FRAGMENTATION
Γλώσσες Τεκμηρίου:
Αγγλικά
Περίληψη:
Fragment yield data, selected with different values of the isospin
asymmetry of the quasiprojectile from Kr-78,Kr-86 + Ni-58,Ni-64
reactions at E-lab = 35 MeV/nucleon, have been analyzed within the
framework of Landau free energy approach. Fits to the free energy data
indicated the system to be in the regime of a first-order phase
transition. The plot of free energy versus isospin asymmetry of the
fragments showed a systematic change with increasing isospin asymmetry
of the fragmenting source. This observation demonstrated the role of
quasiprojectile isospin asymmetry as an external field which governed
the minima positions in the free energy plot. The position of the
central minimum was found to be in close agreement with the average
isospin asymmetry of the fragments calculated excluding neutrons and
protons. Significant deviations from the free energy plot were observed
for N = Z fragments, particularly for the lighter ones, which could be
corrected after inclusion of odd-even effects in the analysis. Analysis
of yield data of N = Z nuclei gave a reasonable estimate of temperature.
Analysis of free energy data gated with excitation energy of the
fragmenting source showed a dependence of fit parameters of Landau free
energy equation on the excitation energy as well as isospin asymmetry of
the source.
Συγγραφείς:
Tripathi, R.
Bonasera, A.
Wuenschel, S.
May, L. W. and
Kohley, Z.
Marini, P.
Mcintosh, A.
Souliotis, G. A. and
Galanopoulos, S.
Hagel, K.
Shetty, D. V.
Huseman, K. and
Soisson, S. N.
Stein, B. C.
Yennello, S. J.
Περιοδικό:
International Journal of Modern Physics E
Εκδότης:
WORLD SCIENTIFIC PUBL CO PTE LTD
Λέξεις-κλειδιά:
Nuclear fragmentation; fragment yield; quasiprojectile reconstruction
DOI:
10.1142/S021830131250019X
