[en] This paper explains the ΛN effective interactions for ls/sub Λ/ and 1p/sub Λ/ configurations in the nuclear p-shell are discussed from a phenomenological point of view

[en] This report describes a systematic study which involves /sup 238/U-projectiles on light target masses ranging from /sup 16/O to /sup 89/Y: it considers a recent experiment analysed in great detail and already described in previous two communications. The aspects discussed deal with the general features of quasi-fission as they emerge from the measured angle-mass correlation plot of the primary products for different reactions. On the basis of the observed distinct dependence between fragment mass and scattering angle and of simplified trajectory calculations, a relaxation time of 5.2 +- 0.5 . 10/sup -21/s is deduced for the mass equilibration

[en] The author discusses pion interferometry data (2-pion correlation) are examined for information on size and lifetime of the pion-emitting matter. The temperatures inferred from pion, proton and kaon spectra are considered. An explanation consistent with the above size and temperature data is proposed. New theoretical Monte Carlo results on spectator effects on heavy-ion pion spectra are presented

[en] Recent experimental investigations of A(p-bar,π/sup -/)A+1 reactions leading to discrete nuclear final states have revealed expected and unexpected simple signatures of a near-threshold pion production mechanism dominated by nucleon-nucleon encounters (NN → NNπ) in the nuclear medium. Qualitative explanations are given for a number of observed features, including the systematic selective population of high-spin, two-particle one-hole states in (p,π/sup -/) reactions on many target nuclei. Ongoing extensions to the experimental program are discussed, involving both spectroscopic applications (the location of ''stretched'' 2p-1h states across the periodic table) and the use of nuclear structure constraints to address more detailed questions concerning the pion production mechanism in nuclei

[en] The authors discuss the bandhead energies of two-quasiparticle states expected to appear in the excitation spectra of doubly odd Lu isotopes calculated on a quantitative evaluation of the zero range residual n-p interaction and compared with the available experimental information to deduce the deformed orbital configurations. Predictions are made about the expected locations of several as yet unobserved states

[en] The authors have made measurements of the photon decay of the giant multipole resonances in /sup 208/Pb. The giant resonances were excited by inelastic scattering of 380 MeV /sup 17/O projectile and the photons were detected in the ORNL Spin Spectrometer. The results show a quadrupole resonance ground state gamma branch of 20% while only ≤2% of the GQR decay proceeds through the 2.6 MeV, 3/sup -/ state. Nearly one half of the GQR decay through a 3/sup -/ state at 4.974 MeV. Photon decay from the dipole and monopole resonance and high spin resonances (4/sup +/,6/sup +/) are also observed

[en] Kr-85 sources and their contributions to its content in the atmosphere are described. A measuring technique for Kr-85 concentration in the atmosphere is suggested based on beta activity detection. The measuring results obtained in Hungary within 1966-1982 are presented. Probable causes of Kr-85 concentration variations, speed of its global spreading and impact on people health are discussed

[en] Evaluating left ventricular (LV) function, planar radionuclide ventirculography is limited by background and counts from different depths, but GSPECT is not. Its ability to describe wall motion accurately is presented, with reference to angiographic data. 61 patients with chest pain had GSPECT 1h before left catherisation. GSPECT examined an 12 mm thick sagittal slice along the LV major axis, and contrast ventriculography (CV) analysed a 30⁰ RAO view. Wall motion was evaluated in 10 sectors centered on a fixed point (following the Stanford group) giving 10 ejection fractions from GSPECT and 10 mean radius shortening %s for CV. The sectorial data (GSPECT vs. CV) were analyzed by linear regression. Inter and intraobserver reproducibilities were better for GSPECT than for CV. Also a comparison was made of the diagnostic value of this method of quantification applied to the two imaging techniques using ROC analysis. The authors conclude that GSPECT correlates with CV and allows accurate non invasive quantitative study of all ventricular segments

[en] HEADTOME III, a high quantitation and high resolution positron emission tomograph (PET) has been developed. HEADTOME III was basically designed as a brain PET of 3 rings 5 planes. Each ring (75 cm diam) consists of 160 BGOs (13.4 x 25 x 40 mm). Shadow masks and septa can be used independently, corresponding to low (LR) and high resolution mode (HR), and low (LQ) and high quantitation mode (HQ) respectively. Planar resolutions at the center of the field of view (FOV) were 8.2 and 6.5 mm FWHM in LR an HR, respectively. Deterioration of resolution at 8 cm radius were 0.6 and 0.8 in FWHM. Slice thicknesses were 12.8 and 9.1 mm FWHM at the center of FOV with LQ and HQ, respectively, its deviation being 1.1 and 0.8 mm over FOV with each, and 0.1 mm difference between direct and cross planes in LQ mode. Sensitivities, true events for Ga-68 20 cm diam cylinder, were 32(68), 17(33), 18 and 9 kcps/ (μCi/ml) with the direct (cross) planes of LRLQ, direct (cross) planes of HRLQ, direct planes of LRHQ and HRHQ, respectively. Count rates were declined 10% at 30 kcps true events per plane but recovered up to 100 kcps within 5% error by software correction using random coincidence events. Scattered fraction after corrected by subtracting a mean of outside the FOV in sinogram was 10 and 3% in the reconstructed images in LQ and HQ, respectively. Long term stability evaluated cross calibration factor checked weekly in the last half year was 1.9% COV as an average of 5 planes and 2.2% at maximum plane. These data imply that HEADTOME III permits an accurate analysis of tracer kinetics

[en] Single-vessel coronary artery (CA) disease (SVD) is not uniformly benign: long-term prognosis is likely to be related to the extent (E) and severity (S) of myocardial ischemia (isch). To assess the ability of stress thalium-201 (Tl) single photon emission computerized tomography (SPECT) to quantify E and S of isch, the authors studied 15 patients (pts) without myocardial infarction who had SVD (8 LAD, 4 RCA, and 3 LCX). SPECT cuts were analyzed using maximum count circumferential profiles (CPs) which were compared with previously established normal (nl) limits derived from 20 nl pts. E of isch was defined as the % of the CP points falling below nl, S and depth (D) of ischemia respectively expressed the total and the mean % by which the abnormal points fell below normal limits. Although all pts had SVD, the range of E, S and D of isch was wide (0 to 48% and 0 to 38% and 0 to 20% respectively). CA scores (CS) were derived using a 15-point system accounting for the distribution of the diseased CA, location, and degree of stenosis, and collateral supply. CS varied from 1.2 to 8. E and S significantly correlated with CS (r=.74,p=.001, and r=.78, p=.000, respectively). The 6 pts with a D ≤ .1 had 75% CA stenosis whereas 5 of the 9 pts with D <.1 had only 50-75% stenosis. Thus, the authors conclude that: 1) pts with SVD have highly differing degrees of isch; 2) E, S and D scores from Tl SPECT correlate favorably with the angiographic extent and severity of disease; and 3) SPECT offers potential for quantification of the magnitude of isch and may become a useful, noninvasive prognostic indicator