Rapidity distributions of Z=1 isotopes and the nuclear symmetry energy from Sn plus Sn collisions with radioactive beams at 270 MeV/nucleon

Kaneko, M.; Murakami, T.; Isobe, T.; Kurata-Nishimura, M.; Ono, A.; Ikeno, N.; Barney, J.; Cerizza, G.; Estee, J.; Jhang, G.; Lee, J. W.; Lynch, W. G.; Santamaria, C.; Tsang, C. Y.; Tsang, M. B.; Wang, R.; Ahn, D. S.; Atar, L.; Aumann, T.; Baba, H.; Boretzky, K.; Brzychczyk, J.; Chiga, N.; Fukuda, N.; Gasparic, I; Hong, B.; Horvat, A.; Ichihara, T.; Ieki, K.; Inabe, N.; 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.; Olsen, R.; Otsu, H.; Pawlowski, P.; Pelczar, K.; Rossi, D.; Sakurai, H.; Sato, H.; Scheit, H.; Shane, R.; Shimizu, Y.; Simon, H.; Sumikama, T.; Suzuki, D.; Suzuki, H.; Takeda, H.; Tangwancharoen, S.; Togano, Y.; Toernqvist, H.; Xiao, Z.; Yennello, S. J.; Yurkon, J.; Zhang, Y.

doi:10.1016/j.physletb.2021.136681

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Rapidity distributions of Z=1 isotopes and the nuclear symmetry energy from Sn plus Sn collisions with radioactive beams at 270 MeV/nucleon

Kaneko, M.;
Murakami, T.;
Isobe, T.;
Kurata-Nishimura, M.;
Ono, A.;
... Hong, B.;
외 59명

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초록

The rapidity distributions of hydrogen isotopes emitted from central collisions of neutron-rich Sn-132+Sn-124 and neutron-deficient Sn-108+Sn-112 systems at 270 MeV/nucleon were investigated at RIKEN-RIBF. The data are compared with antisymmetrized molecular dynamics (AMD) calculations and the rapidity distributions can be reproduced after adjusting the in-medium nucleon-nucleon cross sections. The double ratios between the two reaction systems taken for the relative yields of deuteron to proton (d/p) and triton to proton (t/p) are further examined in the midrapidity domain, where the adjustments in the AMD calculations do not affect much on them. The d/p and t/p double ratios at midrapidity agree well with the ratio of the system neutron numbers and its squared value, respectively, and the rapidity dependence of these double ratios is consistent with a picture of partial mixing of colliding nuclei. By comparing with the AMD model which shows a strong symmetry energy dependence of the t/p double ratio, the experimental result in the midrapidity domain favors the calculation with a symmetry-energy slope parameter around L = 46 MeV rather than L = 108 MeV. (C) 2021 The Author(s). Published by Elsevier B.V.

키워드

Heavy radioactive isotope collisions; Cluster productions; Nuclear symmetry energy; Antisymmetrized molecular dynamics; TIME PROJECTION CHAMBER; EQUATION-OF-STATE; CLUSTER PRODUCTION; HEAVY; FLOW; FRAGMENTS; DYNAMICS; SYSTEM; PROBE

제목: Rapidity distributions of Z=1 isotopes and the nuclear symmetry energy from Sn plus Sn collisions with radioactive beams at 270 MeV/nucleon

저자: Kaneko, M.; Murakami, T.; Isobe, T.; Kurata-Nishimura, M.; Ono, A.; Ikeno, N.; Barney, J.; Cerizza, G.; Estee, J.; Jhang, G.; Lee, J. W.; Lynch, W. G.; Santamaria, C.; Tsang, C. Y.; Tsang, M. B.; Wang, R.; Ahn, D. S.; Atar, L.; Aumann, T.; Baba, H.; Boretzky, K.; Brzychczyk, J.; Chiga, N.; Fukuda, N.; Gasparic, I; Hong, B.; Horvat, A.; Ichihara, T.; Ieki, K.; Inabe, N.; 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.; Olsen, R.; Otsu, H.; Pawlowski, P.; Pelczar, K.; Rossi, D.; Sakurai, H.; Sato, H.; Scheit, H.; Shane, R.; Shimizu, Y.; Simon, H.; Sumikama, T.; Suzuki, D.; Suzuki, H.; Takeda, H.; Tangwancharoen, S.; Togano, Y.; Toernqvist, H.; Xiao, Z.; Yennello, S. J.; Yurkon, J.; Zhang, Y.

DOI: 10.1016/j.physletb.2021.136681

발행일: 2021-11-10

유형: Article

저널명: Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

권: 822