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Title: Neutron-proton equilibration in 35 MeV/ u collisions of 64 , 70 Zn + 64 , 70 Zn and 64 Zn, 64 Ni + 64 Zn, 64 Ni quantified using triplicate probes

Abstract

Previous work has quantified the degree of neutron-proton equilibration in heavy-ion nuclear collisions by observing the convergence of isospin observables (such as the isoscaling parameter α ) to an expected value based on similar symmetric reaction systems. Here, we present a new signature of equilibration: the convergence of the isospin asymmetry (as quantified by three isoscaling metrics) of two mirror asymmetric reaction systems toward each other rather than a predefined point. For the reactions of 35 MeV/u 64,70Zn + 64,70Zn and 64Zn, 64Ni + 64Zn, 64Ni the neutron-proton equilibration was found to be approximately 80%, and this result is compared directly to previous work.

Authors:
 [1];  [1];  [1];  [1];  [1];  [1];  [1];  [1];  [1];  [1];  [1];  [1];  [1];  [2];  [1];  [1];  [1];  [1]
  1. Texas A & M Univ., College Station, TX (United States)
  2. Texas A & M Univ., College Station, TX (United States) ; Univ. of Athens (Greece)
Publication Date:
Research Org.:
Texas A & M Univ., College Station, TX (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Nuclear Physics (NP)
OSTI Identifier:
1610243
Alternate Identifier(s):
OSTI ID: 1475472
Grant/Contract Number:  
FG02-93ER40773
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Physical Review C
Additional Journal Information:
Journal Volume: 98; Journal Issue: 4; 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; equations of state of nuclear matter; low & intermediate energy heavy-ion reactions; nuclear reactions

Citation Formats

May, L. W., Wakhle, A., McIntosh, A. B., Kohley, Z., Behling, S., Bonasera, A., Bonasera, G., Cammarata, P., Hagel, K., Heilborn, L., Jedele, A., Raphelt, A., Manso, A. Rodriguez, Souliotis, G., Tripathi, R., Youngs, M. D., Zarrella, A., and Yennello, S. J. Neutron-proton equilibration in 35 MeV/ u collisions of 64,70Zn + 64,70Zn and 64Zn, 64Ni + 64Zn, 64Ni quantified using triplicate probes. United States: N. p., 2018. Web. doi:10.1103/physrevc.98.044602.
May, L. W., Wakhle, A., McIntosh, A. B., Kohley, Z., Behling, S., Bonasera, A., Bonasera, G., Cammarata, P., Hagel, K., Heilborn, L., Jedele, A., Raphelt, A., Manso, A. Rodriguez, Souliotis, G., Tripathi, R., Youngs, M. D., Zarrella, A., & Yennello, S. J. Neutron-proton equilibration in 35 MeV/ u collisions of 64,70Zn + 64,70Zn and 64Zn, 64Ni + 64Zn, 64Ni quantified using triplicate probes. United States. doi:10.1103/physrevc.98.044602.
May, L. W., Wakhle, A., McIntosh, A. B., Kohley, Z., Behling, S., Bonasera, A., Bonasera, G., Cammarata, P., Hagel, K., Heilborn, L., Jedele, A., Raphelt, A., Manso, A. Rodriguez, Souliotis, G., Tripathi, R., Youngs, M. D., Zarrella, A., and Yennello, S. J. Wed . "Neutron-proton equilibration in 35 MeV/ u collisions of 64,70Zn + 64,70Zn and 64Zn, 64Ni + 64Zn, 64Ni quantified using triplicate probes". United States. doi:10.1103/physrevc.98.044602. https://www.osti.gov/servlets/purl/1610243.
@article{osti_1610243,
title = {Neutron-proton equilibration in 35 MeV/ u collisions of 64,70Zn + 64,70Zn and 64Zn, 64Ni + 64Zn, 64Ni quantified using triplicate probes},
author = {May, L. W. and Wakhle, A. and McIntosh, A. B. and Kohley, Z. and Behling, S. and Bonasera, A. and Bonasera, G. and Cammarata, P. and Hagel, K. and Heilborn, L. and Jedele, A. and Raphelt, A. and Manso, A. Rodriguez and Souliotis, G. and Tripathi, R. and Youngs, M. D. and Zarrella, A. and Yennello, S. J.},
abstractNote = {Previous work has quantified the degree of neutron-proton equilibration in heavy-ion nuclear collisions by observing the convergence of isospin observables (such as the isoscaling parameter α ) to an expected value based on similar symmetric reaction systems. Here, we present a new signature of equilibration: the convergence of the isospin asymmetry (as quantified by three isoscaling metrics) of two mirror asymmetric reaction systems toward each other rather than a predefined point. For the reactions of 35 MeV/u 64,70Zn + 64,70Zn and 64Zn, 64Ni + 64Zn, 64Ni the neutron-proton equilibration was found to be approximately 80%, and this result is compared directly to previous work.},
doi = {10.1103/physrevc.98.044602},
journal = {Physical Review C},
issn = {2469-9985},
number = 4,
volume = 98,
place = {United States},
year = {2018},
month = {10}
}

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