[en] Hadronic spectra from collisions of heavy ions at ultrarelativistic energies are discussed, concentrating on recent measurements at the SPS of central Pb+Pb collisions at 158 GeV/nucleon, which are compared to collisions of lighter ions and at lower beam energies. Baryon stopping is seen to be larger for heavier systems and lower energies. Total yields of pions and kaons scale with the number of participants in central collisions at the SPS; in particular, the K/π ratio is constant between central S+S and Pb+Pb at the SPS. Transverse mass spectra indicate significantly larger radial flow for the heavier systems. At midrapidity, an enhancement of <π^->/<π⁺> and < K^->/< K⁺> at low P_T are best explained by final state Coulomb interaction with the residual charge of the fireball

[en] NA49 is a major new experimental facility at the CERN SPS designed for the study of Lead-Lead collisions at ultrarelativistic energies. The main components of NA49 are four large Time Projection Chambers (TPCs) situated inside and downstream of two dipole magnets for the momentum analysis and identification of all (meta)stable hadrons in the forward half of phase space. Two of the four TPCs were brought into operation during the first Lead Beam run at the CERN SPS in November 1994. The author presents the first physics results from the TPCs for central and minimum bias Lead-Lead collisions at 160 GeV/nucleon

[en] We have studied one and two-dimensional intermittency in S+S collisions at 200 GeV/nucleon in a high statistics electronic measurement at the CERN SPS using pad-readout streamer tubes. We observe no intermittency signal beyond that produced by folding the Fritiof event generator with a detailed model of our detector. Even though the observed signal contains significant distortions due to experimental effects, we show that we are sensitive to intermittency in the collision

[en] Nonstatistical or ''intermittent'' fluctuations of charged particle multiplicities have been investigated at the CERN SPS with the WA80 multiplicity array for ³²S+S and ³²S+Au collisions of varying centrality. Within the phase space domain studied there is no evidence for intermittency in these collisions beyond that accounted for by FRITIOF filtered through a full detector simulation

[en] This report contains a list of the major heavy ion experiments conducted at CERN and Brookhaven

No abstract available

[en] Using the NA49 main TPC, the central production of (Ξ + bar Ξ) hyperons has been measured in CERN SPS Pb on Pb collisions at 158 GeV/c. The preliminary (Ξ + bar Ξ)/ (Λ + bar Λ) ratio, studied at 2.0 < y < 2.6 and 1 < p_T < 3 GeV/c, equals ∼ (13 ± 4)% (systematic error only). It is compatible, within errors, with the previously obtained ratios for central S+S, S+W, and S+Au collisions. The fit to the transferse momentum distribution resulted in an inverse slope parameter T of 297 MeV. At this level of statistics we do not see any noticeable enhancement of hyperon production with the increased volume (and, possibly, degree of equilibration) of the system from S+S to Pb+Pb. This result is unexpected and counterintuitive, and should be further investigated. If confirmed, it will have a significant impact on our understanding of mechanisms leading to the enhanced strangeness production in heavy ion collisions

[en] A series of 100 patients with Hodgkins disease were submitted to staging laparotomy, without mortality and with negligible morbidity. Thirty-one patients were restaged: 23 had occult intra-abdominal disease and 8 false-positive lymphangiograms. Standardized treatment programmes were tested against our clinical and pathological data to determine whether staging laparotomy would alter therapeutic decisions. Programmes based on clinical staging and employing radical radiotherapy would have encompassed all disease without recourse to laparotomy. In contrast, a more conservative programme which employed mantle field irradiation for clinically localized cervical disease, without laparotomy, would have missed disease in 12% of cases. Patiens with supradiaphragmatic nodal Hodgkins disease should either have prophylactic abdominal irradiation (without laparotomy) or more limited radiotherapy determined by laparotomy (without prophylactic irradiation)

No abstract available

[en] The conventional shell model, in which the short-range forces between the ions in a crystal are assumed to act between shells only, can give a good account of the elastic, dielectric and phonon properties of strontium titanate at room temperature. In this paper the modifications that are necessary in order to explain the strong temperature dependence of the elastic constants, static permittivity and frequency of the soft mode in the cubic phase of strontium titanate are considered