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collisions at 
= 200 GeVAdare, A.*; Afanasiev, S.*; Aidala, C.*; Ajitanand, N. N.*; Akiba, Y.*; Al-Bataineh, H.*; Alexander, J.*; Aoki, K.*; Aphecetche, L.*; Armendariz, R.*; et al.
Physical Review D, 84(1), p.012006_1 - 012006_18, 2011/07
Times Cited Count：29 Percentile：72.31(Astronomy & Astrophysics)We report on the event structure and double helicity asymmetry (
) of jet production in longitudinally polarized collisions at = 200 GeV. Photons and charged particles were measured by the PHENIX experiment. Event structure was compared with the results from PYTHIA event generator. The production rate of reconstructed jets is satisfactorily reproduced with the next-to-leading-order perturbative QCD calculation. We measured = -0.0014 
0.0037 at the lowest 
bin and -0.0181 0.0282 at the highest bin. The measured is compared with the predictions that assume various 
distributions.
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：184 Percentile：99.44(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：8 Percentile：49.7(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.
+ collisions at = 200 GeV and scaling properties of hadron productionAdare, A.*; Afanasiev, S.*; Aidala, C.*; Ajitanand, N. N.*; Akiba, Y.*; Al-Bataineh, H.*; Alexander, J.*; Aoki, K.*; Aphecetche, L.*; Armendariz, R.*; et al.
Physical Review D, 83(5), p.052004_1 - 052004_26, 2011/03
Times Cited Count：175 Percentile：98.48(Astronomy & Astrophysics)The PHENIX experiment at RHIC has measured the invariant differential cross section for production of 
, 
, 
and 
mesons in collisions at = 200 GeV. The spectral shapes of all hadron transverse momentum distributions are well described by a Tsallis distribution functional form with only two parameters, 
and 
, determining the high 
and characterizing the low regions for the spectra, respectively. The integrated invariant cross sections calculated from the fitted distributions are found to be consistent with existing measurements and with statistical model predictions.
Gustafsson, K.*; Sihver, L.*; Mancusi, D.*; Sato, Tatsuhiko; Reitz, G.*; Berger, T.*
Advances in Space Research, 46(10), p.1266 - 1272, 2010/11
Times Cited Count：11 Percentile：58.31(Engineering, Aerospace)A method for benchmarking and developing the code is to simulate experiments performed in space or on Earth. We have carried out the PHITS simulations of the Matroshka experiment which focus on determining the radiation load on astronauts inside and outside the International Space Station by using a torso of a tissue equivalent human phantom, filled with active and passive detectors located in the positions of critical tissues and organs. We will present status and results of our simulations.
Sihver, L.*; Sato, Tatsuhiko; Gustafsson, K.*; Mancusi, D.*; Iwase, Hiroshi*; Niita, Koji*; Nakashima, Hiroshi; Sakamoto, Yukio; Iwamoto, Yosuke; Matsuda, Norihiro
Advances in Space Research, 45(7), p.892 - 899, 2010/04
Times Cited Count：26 Percentile：80.94(Engineering, Aerospace)We will first present the current status of the General-Purpose Particle and Heavy-Ion Transport code System (PHITS). In particular, we will describe benchmarking of calculated cross sections against measurements; we will introduce a relativistically covariant version of JQMD, called R-JQMD, that features an improved ground-state initialization algorithm, and we will show heavy-ion charge-changing cross sections simulated with R-JQMD and compare them to experimental data and to results predicted by the JQMD model.
Sato, Tatsuhiko; Sihver, L.*; Gustafsson, K.*; Mancusi, D.*; Niita, Koji*
Transactions of the American Nuclear Society, 99(1), P. 592, 2008/11
Accurate particle and heavy ion transport codes are required for estimating the radiation risk for personnel and electronic equipment on spacecrafts, as well as estimating the effects of different shielding materials. We are therefore developing and benchmarking a general purpose Monte Carlo code PHITS, which can deal with the transports of all kinds of hadrons and heavy ions with energies up to 200 GeV/n.
Mancusi, D.*; Sihver, L.*; Gustafsson, K.*; La Tessa, C.*; Guetersloh, S.*; Zeitlin, C.*; Miller, J.*; Heilbronn, L.*; Niita, Koji*; Sato, Tatsuhiko; et al.
Nuclear Instruments and Methods in Physics Research B, 254(1), p.30 - 38, 2007/01
Times Cited Count：17 Percentile：73.75(Instruments & Instrumentation)The PHITS code is a three-dimensional Monte Carlo code that is able to simulate the transport of nuclei and other particles in complicated geometries. As a part of a comprehensive benchmarking program, we have investigated the possibility of using PHITS to calculate partial charge-changing cross sections and we have compared the results with measurements. The results suggest that the current reaction-cross-section models might be inadequate for use in space radiation protection: We therefore claim the need for a thorough benchmarking of the models and for new reaction-cross-section measurements and experimental techniques.
Cs(
= 1.63 m) by ABMRPinard, J.*; Duong, H. T.*; Marescaux, D.*; Stroke, H. H.*; Redi, O.*; Gustafsson, M.*; Nilsson, T.*; Matsuki, S.*; Kishimoto, Yasuaki*; Kominato, K.*; et al.
Nuclear Physics A, 753(1-2), p.3 - 12, 2005/05
Times Cited Count：4 Percentile：36.02(Physics, Nuclear)The hfs separation 
of Cs(
m) in the 6s 
S ground state was obtained in a precision measurement near zero magnetic field by means of atomic beam magnetic resonance with laser optical pumping on-line with the CERN-PSB-ISOLDE mass separator. The result, 
MHz, corrects significantly a previous published value from a high-field experiment. With our result, the precision of the nuclear magnetic moment, 
Cs)
, is now limited by the influence of extended nuclear structure on the hfs (the Bohr-Weisskopf effect).
Sihver, L.*; Gustafsson, K.*; Mancusi, D.*; Sato, Tatsuhiko; Niita, Koji*
no journal, ,
Accurate particle and heavy ion transport codes are required for estimating the radiation risk for personnel and electronic equipment on spacecrafts, as well as estimating the effects of different shielding materials. We are therefore developing and benchmarking a general purpose Monte Carlo code PHITS, which can deal with the transports of all kinds of hadrons and heavy ions with energies up to 200 GeV/n. For the purpose of examining the applicability of PHITS to the shielding design, the absorbed doses in a water phantom inside an imaginary space vessel has been estimated for different shielding materials of different thicknesses. The results confirm previous results which indicate that PHITS is a suitable tool when performing shielding design studies of spacecrafts.
Matsuda, Norihiro; Iwamoto, Yosuke; Sakamoto, Yukio; Niita, Koji*; Iwase, Hiroshi*; Sato, Tatsuhiko; Sihver, L.*; Mancusi, D.*; Gustafsson, K.*; Nakashima, Hiroshi
no journal, ,
no abstracts in English
