排序方式: 共有15条查询结果,搜索用时 15 毫秒
1.
2.
3.
4.
Canton L Pisent G Svenne JP van der Knijff D Amos K Karataglidis S 《Physical review letters》2005,94(12):122503
A multichannel algebraic scattering theory, to find solutions of coupled-channel scattering problems with interactions determined by collective models, has been structured to ensure that the Pauli principle is not violated. By tracking the results in the zero coupling limit, a correct interpretation of the subthreshold and resonant spectra of the compound system can be made. As an example, the neutron-12C system is studied defining properties of 13C to 10 MeV excitation. Accounting for the Pauli principle in collective coupled-channels models is crucial to the outcome. 相似文献
5.
6.
We formulate the three-body problem in one dimension in terms of the (Faddeev-type) integral equation approach. As an application,
we develop a spinless, one-dimensional (1-D) model that mimics three-nucleon dynamics in one dimension. Using simple two-body
potentials that reproduce the deuteron binding, we obtain that the three-body system binds at about 7.5 MeV. We then consider
two types of residual pionic corrections in the dynamical equation; one related to the 2π-exchange three-body diagram, the
other to the 1π-exchange three-body diagram. We find that the first contribution can produce an additional binding effect
of about 0.9 MeV. The second term produces smaller binding effects, which are, however, dependent on the uncertainty in the
off-shell extrapolation of the two-body t-matrix. This presents interesting analogies with what occurs in three dimensions. The paper also discusses the general three-particle
quantum scattering problem, for motion restricted to the full line.
Received March 5, 2002; accepted July 19, 2002 相似文献
7.
8.
The structural and electronic transport properties of La1−x
Ce
x
MnO3 (x=0.0–1.0) have been studied. All the samples exhibit orthorhombic crystal symmetry and the unit cell volume decreases with
Ce doping. They also make a metal-insulator transition (MIT) and transition temperature increases with increase in Ce concentration
up to 50% doping. The system La0.5Ce0.5MnO3 also exhibits MIT instead of charge-ordered state as observed in the hole doped systems of the same composition. 相似文献
9.
10.
Abegg R Bandyopadhyay D Birchall J Cairns EW Coombes H Davis CA Davison NE Delheij PP Green PW Greeniaus LG Gubler HP Healy DC Lapointe C Lee WP McDonald WJ Miller CA Moss GA Plattner GR Poffenberger PR Ramsay WD Roy G Soukup J Svenne JP Tkachuk R van Oers WT Wait GD Zhang YP 《Physical review letters》1986,56(24):2571-2574