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Title: Experimental liquid-gas phase transition signals and reaction dynamics

Abstract

The experimental liquid-gas phase transition signals are examined for the quasiprojectile (QP) reconstructed from the reactions of 40Ar + 27Al, 48Ti, 58Ni at 47 MeV/nucleon, using measures of caloric curve, multiplicity derivative, moment parameters, and fluctuation of maximum fragment charge number (NVZ). The QP source is reconstructed, using moving source parametrizations on an event-by-event basis. For the determination of the temperature, a quadrupole fluctuation thermometer is used. Deuterons are chosen for the thermometer to minimize the Coulomb and secondary sequential decay effects. Here, a new event-by-event method is proposed for the thermometer to determine the temperature. All measures show a characteristic signature around the temperature T = 9.0 ± 0.4 MeV, which may suggest that the QP system goes into the liquid-gas phase transition at Tc = 8.3 ± 0.4 MeV after the Coulomb correction.

Authors:
 [1];  [2];  [2];  [3];  [4];  [5];  [6];  [1]
  1. Texas A & M Univ., College Station, TX (United States)
  2. Sichuan Univ., Chengdu (China)
  3. Shaanxi Normal Univ., Xi'an (China)
  4. Chinese Academy of Sciences, Lanzhou (China)
  5. Inner Mongolia Univ. for Nationalities, Tongliao (China)
  6. Xingyi Normal Univ. for Nationalities (China)
Publication Date:
Research Org.:
Texas A & M Univ., College Station, TX (United States)
Sponsoring Org.:
USDOE Office of Science (SC); National Natural Science Foundation of China (NSFC)
OSTI Identifier:
1610244
Alternate Identifier(s):
OSTI ID: 1495066
Grant/Contract Number:  
FG02-93ER40773; 11805138; 11705242; FG02–93ER40773
Resource Type:
Accepted Manuscript
Journal Name:
Physical Review C
Additional Journal Information:
Journal Volume: 99; Journal Issue: 2; 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; low & intermediate energy heavy-ion reactions; nuclear fragmentation; nuclear reactions

Citation Formats

Wada, R., Lin, W., Ren, P., Zheng, H., Liu, X., Huang, M., Yang, K., and Hagel, K. Experimental liquid-gas phase transition signals and reaction dynamics. United States: N. p., 2019. Web. doi:10.1103/physrevc.99.024616.
Wada, R., Lin, W., Ren, P., Zheng, H., Liu, X., Huang, M., Yang, K., & Hagel, K. Experimental liquid-gas phase transition signals and reaction dynamics. United States. https://doi.org/10.1103/physrevc.99.024616
Wada, R., Lin, W., Ren, P., Zheng, H., Liu, X., Huang, M., Yang, K., and Hagel, K. Tue . "Experimental liquid-gas phase transition signals and reaction dynamics". United States. https://doi.org/10.1103/physrevc.99.024616. https://www.osti.gov/servlets/purl/1610244.
@article{osti_1610244,
title = {Experimental liquid-gas phase transition signals and reaction dynamics},
author = {Wada, R. and Lin, W. and Ren, P. and Zheng, H. and Liu, X. and Huang, M. and Yang, K. and Hagel, K.},
abstractNote = {The experimental liquid-gas phase transition signals are examined for the quasiprojectile (QP) reconstructed from the reactions of 40Ar + 27Al, 48Ti, 58Ni at 47 MeV/nucleon, using measures of caloric curve, multiplicity derivative, moment parameters, and fluctuation of maximum fragment charge number (NVZ). The QP source is reconstructed, using moving source parametrizations on an event-by-event basis. For the determination of the temperature, a quadrupole fluctuation thermometer is used. Deuterons are chosen for the thermometer to minimize the Coulomb and secondary sequential decay effects. Here, a new event-by-event method is proposed for the thermometer to determine the temperature. All measures show a characteristic signature around the temperature T = 9.0 ± 0.4 MeV, which may suggest that the QP system goes into the liquid-gas phase transition at Tc = 8.3 ± 0.4 MeV after the Coulomb correction.},
doi = {10.1103/physrevc.99.024616},
journal = {Physical Review C},
number = 2,
volume = 99,
place = {United States},
year = {Tue Feb 19 00:00:00 EST 2019},
month = {Tue Feb 19 00:00:00 EST 2019}
}

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Cited by: 8 works
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Figures / Tables:

FIG. 1 FIG. 1: Moving source fit for deuterons at selected angles for Bin1 (most central) of 40Ar+48Ti at 47 MeV/nucleon. Circles are experimental data and red solid, blue long-dashed, green dashed and black-dotted curves represent the summed, QP, NN and QT source, respectively. On the left to right column, $V^{ NN}_{s}$more » value is set as $V^{ NN}_{s}$ = 4.0, 5.0, 6.0 cm/ns. χ 2 values are changed as 2.37, 1.79, 1.64 for $V^{ NN}_{s}$ = 4.0, 5.0, 6.0 cm/ns, respectively. The best χ 2 value is 1.63 at $V^{ NN}_{s}$ = 5.4 cm/ns.« less

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