Isoscaling in central Sn+Sn collisions at 270 MeV/u

(SπRIT Collaboration) Lee, J. W.; Tsang, M. B.; Tsang, C. Y.; Wang, R.; Barney, J.; Estee, J.; Isobe, T.; Kaneko, M.; Kurata-Nishimura, M.; Lynch, W. G.; Murakami, T.; Ono, A.; Souza, S. R.; Ahn, D. S.; Atar, L.; Aumann, T.; Baba, H.; Boretzky, K.; Brzychczyk, J.; Cerizza, G.; Chiga, N.; Fukuda, N.; Gasparic, I; Hong, B.; Horvat, A.; Ieki, K.; Ikeno, N.; Inabe, N.; Jhang, G.; Kim, Y. J.; Kobayashi, T.; Kondo, Y.; Lasko, P.; Lee, H. S.; Leifels, Y.; Lukasik, J.; Manfredi, J.; McIntosh, A. B.; Morfouace, P.; Nakamura, T.; Nakatsuka, N.; Nishimura, S.; Otsu, H.; Pawlowski, P.; Pelczar, K.; Rossi, D.; Sakurai, H.; Santamaria, C.; Sato, H.; Scheit, H.; Shane, R.; Shimizu, Y.; Simon, H.; Snoch, A.; Sochocka, A.; Sumikama, T.; Suzuki, H.; Suzuki, D.; Takeda, H.; Tangwancharoen, S.; Togano, Y.; Xiao, Z. G.; Yennello, S. J.; Zhang, Y. (2022) Isoscaling in central Sn+Sn collisions at 270 MeV/u. European Physical Journal A, 58 (10). ISSN 1434-601X

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Abstract

Experimental information on fragment emissions is important in understanding the dynamics of nuclear collisions and in the development of transportmodel simulating heavy-ion collisions. The composition of complex fragments emitted in the heavy-ion collisions can be explained by statistical models, which assume that thermal equilibrium is achieved at collision energies below 100 MeV/u. Our new experimental data together with theoretical analyses for light particles from Sn+Sn collisions at 270 MeV/u, suggest that the hypothesis of thermal equilibrium breaks down for particles emitted with high transfer momentum. To inspect the system's properties in such limit, the scaling features of the yield ratios of particles from two systems, a neutron-rich system of Sn-132 + Sn-124 and a nearly symmetric system of Sn-108 + Sn-112, are examined in the framework of the statistical multifragmentation model and the antisymmetrized molecular dynamics model. The isoscaling from low energy particles agree with both models. However the observed breakdown of isoscaling for particles with high transverse momentum cannot be explained by the antisymmetrized molecular dynamics model.

Item Type:	Article
Uncontrolled Keywords:	Heavy radioactive isotope collisions ; Cluster productions ; Nuclear symmetry energy ; Antisymmetrized molecular dynamics
Subjects:	NATURAL SCIENCES > Physics
Divisions:	Division of Experimental Physics
Projects:	Project title Project leader Project code Project type Nuklearna struktura i reakcije: eksperimentima prema neutronskoj liniji kapanja-SR-ETNo Suzana Szilner IP-2013-11-7194 HRZZ Zemljovid atomskih jezgara - neutronski bogata strana-NeRiS-Land Suzana Szilner IP-2018-01-1257 HRZZ
Depositing User:	Lorena Palameta
Date Deposited:	14 Jul 2026 12:05
URI:	https://fulir.irb.hr:/id/eprint/12062
DOI:	10.1140/epja/s10050-022-00851-2

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