[en] This is the fourth annual edition of the National Nuclear Data Center charged-particle bibliography. This edition is cumulative and supersedes the previous editions. The bibliography's primary aims are to satisfy the need for a concise and comprehensive index of integral charged-particle cross section data and to provide an index of charged-particle data compiled in the international exchange format. References in this Part are by target for the various incident charged particles (in order of increasing A). The present publication is an archival volume; future publications will be cumulative supplements to this edition

[en] Absolute fission cross-section measurements at fixed neutron energies of 2.6, 8.5 and 14.7 MeV are being performed at the Radiuminstitute Leningrad (RIL) and the Technical University of Dresden (TUD) employing the time correlated associated particle method (TCAPM). The number of neutrons reaching the fission target is determined by counting the charged particles (Nsub(AP)) associated with these neutrons due to the kinematics of the neutron producing reactions [D(d,n)³He or T(d,n)⁴He]. The fission events (Nsub(f)) are counted in coincidence with the associated particles only, since more neutrons than the associated particles reach the fissile layer. The fission cross section is given by the formula: σsub(f)=Nsub(f)/Nsub(AP).n where n is the number of fissile nuclei per cm². The sources of uncertainties in Nsub(f) and n are common with these of other methods of fission cross-section measurements, where fast fission chambers are used. The uncertainty of Nsub(AP), however, is connected with the special conditions of the TCAPM

[en] We present a simple equation to estimate nuclear fragmentation cross sections at high energy. The equation can be given a geometrical interpretation, suggesting that the fragmentation cross sections might be used to probe the nucleon distributions in nuclei. (orig.)

[en] Modern libraries of multigroup cross-sections often include covariances of the multigroup data. Data covariances are especially useful in calculating the variance of an important applied quantity z that can be calculated as a function of the data. Frequently, it is also of interest to know the magnitude of the contributions to this variance arising from various subsets of the data. This knowledge can be used, for example, in judging the benefits of performing specific new measurements, calculations, or evaluations on a given data subset. Here we describe a method for determining the contribution of an identified set of parameters to the variance of z that can be applied without difficulty even when the data have general correlations.

[en] This is the fourth annual edition of the National Nuclear Data Center charged-particle bibliography. This edition is cumulative and supersedes the previous editions. The bibliography's primary aims are to satisfy the need for a concise and comprehensive index of integral charged-particle cross section data and to provide an index of charged-particle data compiled in the international exchange format, EXFOR. This part of the publication deals with isotope production; references are ordered by mass of the nuclide produced. The present publication is an archival volume; future publications will be cumulative supplements to this edition

[en] The Glauber model approach for the description of the heavy-ion reaction cross section is extended to lower energies. A simple analytic expression for the transparency function is obtained by evaluating the overlap integral of the nuclear densities over the hyperbolic trajectory. Using this transparency function the reaction cross section of a large number of heavy-ion systems is predicted reasonably well at low energies

[en] Effects of the co-annihilation mechanism of neutralinos with stop quarks here are emphasized. In particular, it is shown that the upper limit on the neutralino mass is increased up to a few TeV (compare to a few hundred of GeV when there is annihilation only), indicating that neutralinos could be out of the reach of future accelerators. This mechanism is also shown to be available for a quite large difference of mass between stops and neutralinos. As a result, the allowed region in the plane (m₀, m_1/2) is significantly larger than the one obtained in a mSUGRA model where co-annihilation of neutralinos must occur with s-tau particles. (author)

[en] We report experimentally measured photo-ionization cross sections for the 3d ²D excited states of lithium and sodium at first ionization threshold. The experiments were performed using two dye lasers simultaneously pumped by the second harmonic of a Nd:YAG laser. The vapor contentment and the detection system was a thermionic diode ion detector operating in a space charge limited mode. Photoionization cross sections of the excited states were deduced from the dependence of ion signal intensity on the ionizing laser energies as (19±3) Mb and (21.5±3.5) Mb for lithium and sodium respectively, which are in good agreement with the previously computed theoretical results. (authors)

No abstract available

[en] An eight-dimensional quantum dynamical model is proposed and applied to the title reaction. The reaction probabilities and integral cross sections have been determined for both the ground and excited vibrational states of the two reactants. The results indicate that the H_2 stretching and CH_3 umbrella modes, along with the translational energy, strongly promote the reactivity, while the CH_3 symmetric stretching mode has a negligible effect. The observed mode specificity is confirmed by full-dimensional quasi-classical trajectory calculations. The mode specificity can be interpreted by the recently proposed sudden vector projection model, which attributes the enhancement effects of the reactant modes to their strong couplings with the reaction coordinate at the transition state