The Institute of Physics ( IOP ) по журналам "Institute of Physics"
Отображаемые элементы 1-20 из 2524
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(2000-07-01)Properties of heavy hypernuclei are studied in the context of a chiral Lagrangian which successfully describes ordinary nuclei. -0 mixing arises from non-diagonal vertices in flavour space induced by the vector mesons and ...
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(1995-01-01)11Li-12C scattering is described as a four-body problem. The succession of approximations required to obtain the simplified approach of Yabana et al(1992) is examined in detail. We found that whereas their simple model is ...
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(1991-09-01)Cross sections of the nuclear reactions 120Sn(n, alpha )117Cd, 54Cr(n, alpha )51Ti, 58Ni(n,p)58m+gCo and 29Si(n,p)29Al induced by 14 MeV neutrons are measured in the laboratory and are found to be in good agreement with ...
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(1993-05-01)12C+12C resonances were successfully classified in the past using both dipole and quadrupole vibration-rotation based phenomenological models. The last such analysis was performed in 1983. Since then, more than 20 new ...
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(1994-02-01)The activation cross section and isomeric ratios for neutron capture are measured at an energy of 14.5 MeV for 181Ta, relative to sigma (181Ta(n,p)181Hf)=2.5 mb. Gamma-ray spectra of the product nuclei were measured with ...
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(1993-04-01)The author investigates the question of whether or not the q-deformation of the U(3) contains/implies O(3) contains/implies O(2) dynamical symmetry improves the description of some 16O+ alpha cluster bands in 20Ne. The ...
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(1990-05-01)Angular distributions of neutrons from the 208Pb( pi +or-, pi +or-'n) reaction near the giant-resonance region have been measured at Tpi =180 MeV. The neutrons arising from pi - inelastic scattering show evidence of peaking ...
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(1994-01-01)An analysis of 47 hours of data, collected by the Gulmarg gamma-ray telescope during the period 27 September-30 October 1989, indicates the absence of a statistically significant DC signal from the X-ray binary pulsar, ...
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(1991-09-01)The authors present a variational calculation for the hypernuclei 9Be and 6He in the alpha alpha Lambda and alpha Lambda Lambda models, respectively, using a basis of harmonic oscillator wave-functions. Some of their ...
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(1999-05-01)We investigate the RPA normal-mode coordinates in the pairing-plus-quadrupole model, with an eye on simplifying the application of large amplitude collective motion techniques. At the Hartree-Bogoliubov minimum, the RPA ...
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(1998-03-01)From the secondary interactions of projectile fragments (PFs) of charges Z > 30 from a beam at 10.6 A GeV from Brookhaven National Laboratory, in emulsion, we observed an increase of more than 51% in secondary interactions ...
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(1998-03-01)We introduce a method based on the finite-size scaling assumption which allows us to determine numerically the critical point and critical exponents related to observables in an infinite system starting from the knowledge ...
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(1991-01-01)On the basis of a three-dimensional Monte Carlo simulation procedure, it is shown that the selection efficiency for EAS initiated by different types of primary nuclei do not essentially depend on the adopted superposition ...
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(1991-12-01)The extension of AMS techniques (accelerator mass spectrometry) to the heavy elements is considered, particularly with reference to the use of small tandem accelerators (VT<3 MV), and a comparison with thermal ionization ...
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(1991-12-01)Three experiments with accelerator mass spectrometry (AMS) are described. (1) The cross section of the reaction 60N(n,2n)59Ni with 14.8 MeV neutrons was measured with AMS to be 410+or-100 mb in agreement with the predictions ...
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(1991-12-01)The use of AMS (accelerator mass spectrometry) to measure nuclear quantities is reviewed. Particular emphasis is put on the discussion of half-life measurements and searches for hypothetical particles.
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(1990-08-01)The potentiality of the gamma-x detector in the accurate determination of PK from multiple gamma and K X-ray summing is investigated. Utilising this method, PK for the 437.0 keV state of 133Cs in the decay of 133Ba (10.5 ...
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(1990-04-01)In a very simple approach the authors study the nucleation process for an infinite system consisting of classical relativistic fermions interacting with a classical scalar field. They examine the temperature and density ...
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(2000-06-01)We perform a three-dimensional (3D) reduction of the two-fermion Bethe-Salpeter equation based on Sazdjian's explicitly covariant propagator, combined with a covariant substitute of the projector on the positive-energy free ...
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(1993-12-01)The energy dependence of the fission cross section for 239Pu(n,f) and 241Am(n,f) is analysed in terms of the double-humped fission barrier model to deduce the barrier heights. Good fits were obtained by assuming the first ...
Отображаемые элементы 1-20 из 2524