- Tytuł:
- Rapidity distributions of Z = 1 isotopes and the nuclear symmetry energy from Sn+Sn collisions with radioactive beams at 270 MeV/nucleon
- Autorzy:
-
Inabe, N.
Leifels, Y.
Shimizu, Y.
Chiga, N.
Törnqvist, H.
Lasko, P.
Horvat, A.
Kobayashi, T.
Gašparić, I.
Suzuki, H.
Pawłowski, P.
Sakurai, H.
Sato, H.
Xiao, Z.
Kurata-Nishimura, M.
Kaneko, M.
Santamaria, C.
Ono, A.
Scheit, H.
Isobe, T.
Manfredi, J.
Cerizza, G.
Estee, J.
Barney, J.
Yurkon, J.
Ichihara, T.
Lee, H. S.
Boretzky, K.
Ahn, D. S.
Morfouace, P.
Olsen, R.
Kondo, Y.
Atar, L.
Lee, J. W.
Lynch, W. G.
Nishimura, S.
Tangwancharoen, S.
Simon, H.
Nakamura, T.
Suzuki, D.
Sumikama, T.
Togano, Y.
Wang, R.
Rossi, D.
Yennello, S. J.
Otsu, H.
Kim, Y. J.
Ieki, K.
Zhang, Y.
Ikeno, N.
Takeda, H.
Pelczar, K.
McIntosh, A. B.
Tsang, C. Y.
Aumann, T.
Baba, H.
Brzychczyk, Janusz
Hong, B.
Murakami, T.
Łukasik, J.
Shane, R.
Tsang, M. B.
Nakatsuka, N.
Fukuda, N.
Jhang, G. - Opis:
- The rapidity distributions of hydrogen isotopes emitted from central collisions of neutron-rich 132Sn+124Sn and neutron-deficient 108Sn+112Sn 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.
- Dostawca treści:
- Repozytorium Uniwersytetu Jagiellońskiego
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