Impact of composition and symmetry energy on the temperature of quasiprojectiles simulated with antisymmetrized molecular dynamics

Sorensen, M. Q.; McIntosh, A. B.; Hagel, K.; Harvey, B. M.; Wada, R.; Abbott, A.; Bills, L.; Gauthier, J.; Hankins, T.; Hannaman, A.; Hood, A.; Jedele, A.; Lui, Y. W.; McIntosh, L. A.; Rider, R.; Schultz, S.; Tobin, Z.; Wakhle, A.; Youngs, M.; Zelga, K.; Yennello, S. J.

doi:10.1103/physrevc.110.064613

Impact of composition and symmetry energy on the temperature of quasiprojectiles simulated with antisymmetrized molecular dynamics

Journal Article · Thu Dec 19 00:00:00 EST 2024 · Physical Review. C

DOI:https://doi.org/10.1103/physrevc.110.064613· OSTI ID:2528651

^[1]; ^[1]; ^[1]; Harvey, B. M. ^[1]; Wada, R. ^[1]; Abbott, A. ^[1]; Bills, L. ^[1]; Gauthier, J. ^[1]; ^[1]; Hannaman, A. ^[1]; Hood, A. ^[1]; Jedele, A. ^[1]; Lui, Y. W. ^[1]; McIntosh, L. A. ^[1]; ^[1]; ^[1]; Tobin, Z. ^[1]; Wakhle, A. ^[1]; Youngs, M. ^[1]; Zelga, K. ^[1] more »

Texas A&M University, College Station, TX (United States)

The equation of state describes the emergent physical properties of matter. Experimental data is needed to help constrain the equation of state for nuclear matter. These constraints can help distinguish between an “asy-stiff” and an “asy-soft” equation of state, which has astrophysical implications. One path to help constrain the models is to analyze the nuclear caloric curve; some experiments have shown dependence on neutron excess, and may thus be sensitive to the asymmetry. A difference in the caloric curve based on the asymmetry of the reconstructed quasiprojectile (QP) had been observed using ⁷⁰Zn on ⁷⁰Zn at 35 MeV/nucleon taken with the NIMROD array. Antisymmetrized molecular dynamics calculations were performed for the same system and deexcited with gemini++. Both Gogny (asy-soft) and Gogny-as (asy-stiff) data sets were generated. The particles were then filtered based on detector geometric acceptance and thresholds. From the accepted particles, the excitation energy and temperature were calculated in the same way as for experimental data. Additionally, filter effects on the observed nuclear caloric curves were investigated. A tendency for the asy-stiff nuclear caloric curves to have higher temperatures than their asy-soft counterparts was observed for a number of probes. In addition, some probes may show sensitivity to the reconstructed composition of the QP, but this is inconclusive due to high statistical fluctuations and a large dependence on the exact method of event selection.

View Accepted Manuscript (DOE)

Research Organization:: Texas A&M University, College Station, TX (United States)

Sponsoring Organization:: USDOE National Nuclear Security Administration (NNSA)

Grant/Contract Number:: FG02-93ER40773; NA0003841

OSTI ID:: 2528651

Journal Information:: Physical Review. C, Journal Name: Physical Review. C Journal Issue: 6 Vol. 110; ISSN 2469-9985

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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