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Title: Solidarity of signal of measures for the liquid-gas phase transition in the statistical multifragmentation model

Abstract

A systematic study of system size, N / Z asymmetry, and fragmenting volume effects as well as the Coulomb effect on experimental measures for the nuclear liquid-gas phase transition and the mechanism of phase transition are carried out in the framework of the statistical multifragmentation model (SMM). The measures examined here are the caloric curve, the specific heat capacity ( C v ), the multiplicity derivative (dM / dT), the moment parameters (M2 and γ2), the fluctuation of maximum fragment charge number (NVZ), the Fisher exponent (τ), and the Zipf's law parameter (ξ). A signal for the first-order phase transition for all the measures is observed. A stronger signal is observed in the system with smaller sizes or with more neutron rich or in smaller fragmenting volumes for the caloric curve, Cv, and dM/dT. The phase-transition temperatures are independent of the system size, N / Z asymmetry, fragmenting volume, and Coulomb force, which indicates these measures give a solid signal for the liquid-gas phase transition in SMM. On the other hand, the phase transition temperature and its behavior of the others slightly depend on the size, the N / Z asymmetry and the volume of the system. A negative heatmore » capacity is observed for systems with As ≥ 100 without the Coulomb force but disappears with the Coulomb. An instructive picture is given in the charge distributions for the observed first-order phase transition.« less

Authors:
 [1];  [1];  [2];  [3];  [4];  [5];  [1];  [6]
  1. Sichuan Univ., Chengdu (China)
  2. Shaanxi Normal Univ., Xi'an (China)
  3. Sichuan Univ., Chengdu (China); Chinese Academy of Sciences, Lanzhou (China)
  4. Inner Mongolia Univ. for Nationalities, Tongliao (China)
  5. Xingyi Normal Univ. for Nationalities (China)
  6. Texas A & M Univ., College Station, TX (United States)
Publication Date:
Research Org.:
Texas A & M Univ., College Station, TX (United States)
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
1610245
Alternate Identifier(s):
OSTI ID: 1512816
Grant/Contract Number:  
FG02-93ER40773
Resource Type:
Accepted Manuscript
Journal Name:
Physical Review C
Additional Journal Information:
Journal Volume: 99; Journal Issue: 5; Journal ID: ISSN 2469-9985
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS; physics; nuclear fragmentation; nuclear matter; thermal & statistical models

Citation Formats

Lin, W., Ren, P., Zheng, H., Liu, X., Huang, M., Yang, K., Qu, G., and Wada, R. Solidarity of signal of measures for the liquid-gas phase transition in the statistical multifragmentation model. United States: N. p., 2019. Web. doi:10.1103/physrevc.99.054616.
Lin, W., Ren, P., Zheng, H., Liu, X., Huang, M., Yang, K., Qu, G., & Wada, R. Solidarity of signal of measures for the liquid-gas phase transition in the statistical multifragmentation model. United States. https://doi.org/10.1103/physrevc.99.054616
Lin, W., Ren, P., Zheng, H., Liu, X., Huang, M., Yang, K., Qu, G., and Wada, R. Wed . "Solidarity of signal of measures for the liquid-gas phase transition in the statistical multifragmentation model". United States. https://doi.org/10.1103/physrevc.99.054616. https://www.osti.gov/servlets/purl/1610245.
@article{osti_1610245,
title = {Solidarity of signal of measures for the liquid-gas phase transition in the statistical multifragmentation model},
author = {Lin, W. and Ren, P. and Zheng, H. and Liu, X. and Huang, M. and Yang, K. and Qu, G. and Wada, R.},
abstractNote = {A systematic study of system size, N / Z asymmetry, and fragmenting volume effects as well as the Coulomb effect on experimental measures for the nuclear liquid-gas phase transition and the mechanism of phase transition are carried out in the framework of the statistical multifragmentation model (SMM). The measures examined here are the caloric curve, the specific heat capacity ( C v ), the multiplicity derivative (dM / dT), the moment parameters (M2 and γ2), the fluctuation of maximum fragment charge number (NVZ), the Fisher exponent (τ), and the Zipf's law parameter (ξ). A signal for the first-order phase transition for all the measures is observed. A stronger signal is observed in the system with smaller sizes or with more neutron rich or in smaller fragmenting volumes for the caloric curve, Cv, and dM/dT. The phase-transition temperatures are independent of the system size, N / Z asymmetry, fragmenting volume, and Coulomb force, which indicates these measures give a solid signal for the liquid-gas phase transition in SMM. On the other hand, the phase transition temperature and its behavior of the others slightly depend on the size, the N / Z asymmetry and the volume of the system. A negative heat capacity is observed for systems with As ≥ 100 without the Coulomb force but disappears with the Coulomb. An instructive picture is given in the charge distributions for the observed first-order phase transition.},
doi = {10.1103/physrevc.99.054616},
journal = {Physical Review C},
number = 5,
volume = 99,
place = {United States},
year = {Wed May 15 00:00:00 EDT 2019},
month = {Wed May 15 00:00:00 EDT 2019}
}

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Figures / Tables:

FIG. 1 FIG. 1: (a) Caloric curve of fragmenting source of As = 40 (open squares), As = 100 (solid circles) and As = 200 (open triangles) of SMM calculations. (b) The specific heat capacity Cv extracted from the caloric curve as a function of source temperature. The same charge to massmore » ratio Zs/As = 0.45 and the same fragmenting volume V = 6V0 are used.« less

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Figures/Tables have been extracted from DOE-funded journal article accepted manuscripts.