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collisions at 
= 200 and 62.4 GeVAdare, A.*; Afanasiev, S.*; Aidala, C.*; Ajitanand, N. N.*; Akiba, Yasuyuki*; Al-Bataineh, H.*; Alexander, J.*; Aoki, Kazuya*; Aphecetche, L.*; Armendariz, R.*; et al.
Physical Review C, 83(6), p.064903_1 - 064903_29, 2011/06
Times Cited Count：200 Percentile：99.33(Physics, Nuclear)Transverse momentum distributions and yields for 
, and 
in collisions at = 200 and 62.4 GeV at midrapidity are measured by the PHENIX experiment at the RHIC. We present the inverse slope parameter, mean transverse momentum, and yield per unit rapidity at each energy, and compare them to other measurements at different collisions. We also present the scaling properties such as 
and 
scaling and discuss the mechanism of the particle production in collisions. The measured spectra are compared to next-to-leading order perturbative QCD calculations.
and Au+Au collisions at 
= 200 GeVAdare, A.*; Afanasiev, S.*; Aidala, C.*; Ajitanand, N. N.*; Akiba, Yasuyuki*; Al-Bataineh, H.*; Alexander, J.*; Aoki, Kazuya*; Aphecetche, L.*; Aramaki, Y.*; et al.
Physical Review C, 83(4), p.044912_1 - 044912_16, 2011/04
Times Cited Count：10 Percentile：53.47(Physics, Nuclear)Measurements of electrons from the decay of open-heavy-flavor mesons have shown that the yields are suppressed in Au+Au collisions compared to expectations from binary-scaled collisions. Here we extend these studies to two particle correlations where one particle is an electron from the decay of a heavy flavor meson and the other is a charged hadron from either the decay of the heavy meson or from jet fragmentation. These measurements provide more detailed information about the interaction between heavy quarks and the quark-gluon matter. We find the away-side-jet shape and yield to be modified in Au+Au collisions compared to collisions.
Sakasai, Akira; Ishida, Shinichi; Matsukawa, Makoto; Akino, Noboru; Ando, Toshinari*; Arai, Takashi; Ezato, Koichiro; Hamada, Kazuya; Ichige, Hisashi; Isono, Takaaki; et al.
Nuclear Fusion, 44(2), p.329 - 334, 2004/02
no abstracts in English
Sakasai, Akira; Ishida, Shinichi; Matsukawa, Makoto; Akino, Noboru; Ando, Toshinari*; Arai, Takashi; Ezato, Koichiro; Hamada, Kazuya; Ichige, Hisashi; Isono, Takaaki; et al.
Nuclear Fusion, 44(2), p.329 - 334, 2004/02
Times Cited Count：7 Percentile：21.86(Physics, Fluids & Plasmas)no abstracts in English
Mamiya, Taisei*; Kusumoto, Tamon*; Matsuya, Yusuke; Ahmad, T. A. T.*; Autsavapromporn, N.*; Chen, C.-B.*; Hirayama, Ryoichi*; Kodaira, Satoshi*; Kurita, Kazuyoshi*; Konishi, Teruaki*
no journal, ,
Heavy ions near the Bragg peak efficiently induce lethal DNA damage. In this study, we hypothesized that cell inactivation is more strongly associated with the local density of secondary electrons than with their total number, and investigated the relationship between cell inactivation and track structure for heavy ions near the Bragg peak. Human pancreatic cancer MIA PaCa-2 cells were irradiated with He, C, and Ne ions near the Bragg peak. The cell inactivation cross section was determined by colony formation assays, and the average number of lethal lesions per ion traversal was calculated. The characteristics of secondary electrons were evaluated using PHITS, a radiation transport simulation code. The results showed that the average number of lethal lesions was proportional to the density of secondary electrons along ion tracks, whereas no correlation was observed with the total number of secondary electrons generated within the cell nucleus. These findings indicate that cell inactivation induced by heavy ions is closely related to the local density of secondary electrons, providing new insights into the mechanisms underlying lethal DNA damage induction.
