The BRAHMS experiment at RHIC Adamczyk, M; Antvorskov, L; Ashktorab, K ...
Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment,
03/2003, Letnik:
499, Številka:
2
Journal Article
Recenzirano
The BRAHMS experiment at RHIC was conceived to pursue the understanding of nuclear matter under extreme conditions by detailed measurements of charged hadrons over the widest possible range of ...rapidity and transverse momentum. The experiment consists of two spectrometers with complementary charged hadron detection capabilities as well as a series of global detectors for event characterization. A series of tracking detectors, time-of-flight arms and Cherenkov detectors enables momentum determination and particle identification over a wide range of rapidity and transverse momentum. Technical details and performance results are presented for the various detector subsystems. The performance of the entire system working together is shown to meet the goals of the experiment.
Results from the BRAHMS experiment at RHIC Röhrich, D; Collaboration, the BRAHMS; Bearden, I G ...
Journal of Physics G: Nuclear and Particle Physics,
07/2002, Letnik:
28, Številka:
7
Journal Article, Conference Proceeding
The BRAHMS probes the hot and dense nuclear matter at the RHIC which has reached its design
energy of psNN = 200 GeV for Au + Au collisions. The BRAHMS uses magnetic spectrometers
for hadrons ...covering a large phase space 0 < y < 4 with good particle identification and momentum
resolution. A comprehensive investigation of multiplicity distributions of emitted charged particles
is carried out. Ratios of yields of antiparticles to particles are also measured as a function of rapidity.
Rapidity dependent net-proton yield indicates that substantial transparency has been achieved in
these collisions. Transverse momentum spectra of charged hadrons are measured up to 5 GeV/c
which indicates a significant medium eect when compared to nucleon + nucleon reference spectra. KCI Citation Count: 3
Gas chambers for identification of charged particles in 4π systems Barczyk, T.; Brzychczyk, J.; Burzyński, P. ...
Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment,
10/1995, Letnik:
364, Številka:
2
Journal Article
Recenzirano
Gas ionization chambers of a special shape adapted for 4π detector systems are presented. Different anode wire configurations are discussed for three working gases: Ar + methane(10%), isobutane, and ...tetrafluoromethane.
The properties of the multifragmentation of ``hot sources'' produced in the 40Ca +40Ca reaction have been studied at a beam energy 35 MeV/nucleon. Two signatures of prompt multifragmentation, which ...make use of special features of particle emission from the ``freeze out volume'', together with an analysis of the reduced relative velocity between pairs of intermediate mass fragments, indicate the presence of a transition from sequential decay to prompt multifragmentation at an excitation energy of about 3 MeV/nucleon.
Emission of alpha particles accompanying fusion-fission processes in the sup 40Ar +sup 232Th reaction at ital E(sup 40Ar) = 365 MeV was studied in a wide range of in-fission-plane and out-of-plane ...angles. The exact determination of the emission angles of both fission fragments combined with the time-of-flight measurements allowed us to reconstruct the complete kinematics of each ternary event. The coincident energy spectra of alpha particles were analyzed by using predictions of the energy spectra of the statistical code CASCADE . The analysis clearly demonstrates emission from the composite system prior to fission, emission from fully accelerated fragments after fission, and also emission during scission. The analysis is presented for both symmetric and asymmetric fission. The results have been analyzed using a time-dependent statistical decay code and confronted with dynamical calculations based on a classical one-body dissipation model. The observed near-scission emission is consistent with evaporation from a dinuclear system just before scission and evaporation from separated fragments just after scission. The analysis suggests that the time scale of fission of the hot composite systems is long (about 7times10sup minus20 s) and the motion during the descent to scission almost completely damped.
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