[en] Results are given for a search for dibaryon resonances in two-proton systems formed in the interaction of α particles (momentum 2 GeV/c per nucleon) with gold nuclei. 7 refs., 1 fig., 1 tab

[en] The ¹⁹⁷Au capture cross section was measured in order to test the detector. The results are in agreement with the published ones. The importance of the weight correction has been shown but the results do not seem to be very sensitive to the shape of the weight function

[en] Static properties (potential energy) of the proximity fission process are studied. The reaction is characterized by forward detection of fission fragments from a target-like nucleus, and backward detection of a projectile-like nucleus

[en] The resonance activation integral of gold has been determined, by means of cadmium ratio measurements of thin foils in a neutron beam. Comparison was made with a 1/v detector, and the neutron spectra were measured with a chopper. The resonance integral, RI, is defined as ∫_0.5^∞σ_r(E)dE/E, where σ_r(E) is the differenc between the total absorption cross section and the 1/v part. An experimental value of 1490 ± 40 barns has been obtained. RI has also been computed from resonance parameter data with the result 1529 ± 70 barns

[en] We present preliminary results for the emission of target rapidity protons in minimum bias and central 11.7 A.GeV/c Au+Au collisions. The data span the pseudo-rapidity range |η| ≤ 0.76 and proton kinetic energy range of 50 ≤ E ≤ 200 MeV. The slopes of the kinetic energy spectra and dN/dη values for central and minimum bias collisions are strikingly similar. Comparison of the results to results for Si+Au and p+A shows that the shape of the dN/dη distribution is independent of the reaction system or centrality suggesting that the spectator matter does not play a decisive role in determining the shape of the proton distributions at back angles for these systems at AGS energies

No abstract available

[en] We study Au +Au reactions at several energies ranging from 250 MeV/A up to 2 GeV/A with BUU theory and with a coalescence model to approximate the final state of protons and light composites. Energy spectra are analyzed in terms of a radially expanding thermal source and global fits determine flow velocities and temperatures. Sensitivity to equations of state, in-medium cross sections, Coulomb and compression effects are all investigated. The results are quite consistent with data from the EOS-TPC collaboration but seem to suggest that the flow is less sensitive to details than would be required of a signal able to put constraints on the equation of state or other quantities

[en] Measurements are presented of single particle spectra using the recently commissioned Au beam at 11.6 A.GeV/c (E-866) and the Si beam at 14.6 A.GeV/c (E-802) from the BNL Tandem-Booster-AGS accelerators facilities. The E-802 magnetic spectrometer was used to make the measurements. Data for both minimum bias and central collisions were collected. An forward calorimeter (ZCAL) and a target multiplicity array (TMA) provided a centrality triggers. For protons, the multiplicity density dN/dy suggests that a fairly large amount of open-quotes stoppingclose quotes has been achieved in central collisions for the heavy systems. The inverse slope parameters T show a broader distribution versus rapidity in Au+Au than in lighter systems. From the deuteron and proton data and by using a thermal coalescence model, it has been found that the size of the interaction region is larger than the size of the projectile. Some comparisons of the new Au+Au data with the final E-802 data (Si+A) and the relativistic cascade code ARC will be made

[en] Helium has been homogeneously introduced into gold foils at room temperature by alpha implantation in a CV-28 cyclotron. After implantation the helium release was observed in isothermal and linear heating experiments. The diffusion coefficient follows an Arrhenius behaviour with D sub(o) = 0.1 cm²/s and ΔH = 1.7 eV. Possible diffusion mechanisms are discussed. (Author)

[en] Multifragment disintegrations have be measured in the reaction ³⁶Ar+¹⁹⁷Au at E/A=50, 80 and 110 MeV with the MSU Miniball. Using the two fragment coincident data we construct two fragment correlations for the open-quotes reducedclose quotes velocity v_red = v_rel / √Z₁ + Z₂ is the function of impact parameter and bombarding energy. By gating on angle between the total and relative momentum of the pair we construct longitudinal (q parallel P) and transverse (q parallel P) correlations. The results compared to Coulomb trajectory calculations