全文获取类型
收费全文 | 45篇 |
免费 | 0篇 |
专业分类
化学 | 30篇 |
晶体学 | 4篇 |
物理学 | 11篇 |
出版年
2018年 | 1篇 |
2017年 | 1篇 |
2013年 | 1篇 |
2011年 | 3篇 |
2009年 | 1篇 |
2008年 | 1篇 |
2007年 | 6篇 |
2006年 | 1篇 |
2003年 | 4篇 |
2002年 | 2篇 |
2001年 | 1篇 |
2000年 | 2篇 |
1999年 | 1篇 |
1998年 | 1篇 |
1997年 | 1篇 |
1996年 | 1篇 |
1995年 | 3篇 |
1994年 | 1篇 |
1988年 | 1篇 |
1987年 | 1篇 |
1983年 | 2篇 |
1982年 | 1篇 |
1981年 | 2篇 |
1979年 | 1篇 |
1978年 | 2篇 |
1976年 | 1篇 |
1975年 | 1篇 |
1974年 | 1篇 |
排序方式: 共有45条查询结果,搜索用时 31 毫秒
1.
L. Biasetto M. Manzolaro A. Andrighetto G. Meneghetti S. Carturan P. Zanonato P. Colombo G. Prete 《The European Physical Journal A - Hadrons and Nuclei》2009,42(3):517-521
The target is one of the key issues of isotope separation on line (ISOL) facilities. SPES, now under development at LNL-INFN,
is an innovative ISOL facility possessing a target chatacterized by seven separate uranium dicarbide thin disks. The research
on the materials development and target prototyping is discussed in the following. 相似文献
2.
D. Scarpa L. Biasetto S. Corradetti M. Manzolaro A. Andrighetto S. Carturan G. Prete P. Zanonato D. W. Stracener 《The European Physical Journal A - Hadrons and Nuclei》2011,47(3):32
In the framework of the R&D program for the SPES (Selective Production of Exotic Species) project of the Istituto Nazionale
di Fisica Nucleare (INFN), production yields of neutron-rich isotopes have been measured at the Holifield Radioactive Ion
Beam Facility (HRIBF, Oak Ridge National Laboratory, USA). This experiment makes use of the multi-foil SPES target prototype
composed of 7 uranium carbide discs, with excess of graphite (ratio C/U = 4 . 77 isotopes of medium mass (between 72 and 141amu), produced via proton-induced fission of uranium using a 40MeV proton
beam, have been collected and analyzed for the target heated at 2000 ° C target temperature. 相似文献
3.
A. Quaranta S. Carturan T. Marchi M. Buffa M. Degerlier M. Cinausero G. Guastalla F. Gramegna G. Valotto G. Maggioni V.L. Kravchuk 《Journal of Non》2011,357(8-9):1921-1925
Boron doped polysiloxane scintillators have been produced with different concentrations of boron and their scintillation yields have been studied as a function of the boron content under α, γ and fast and thermal neutrons irradiation. Their response has been compared with standard commercial plastic scintillators, namely EJ-212 as plastic scintillator and EJ-254 as boron doped scintillator. The produced samples exhibited a scintillation yield similar to EJ-212. The effect of boron on the energy transfer mechanism and on the polymer radiation hardness has been investigated by means of fluorescence and ion beam induced luminescence (IBIL) measurements. Detection efficiencies for thermal neutrons higher than commercial plastic scintillators have been attained with boron doped samples. 相似文献
4.
5.
6.
A basic aqueous solution of maleimide or phthalimide reacts with [Pt(diene)Cl2] complexes to give complexes of the type [Pt(diene)(imidate)2] (diene = 1,5-cyclooctadiene, dicyclopentadiene and norbornadiene). The spectra and the reactions of these complexes give information about the nature of the PtN σ-bond. 相似文献
7.
The behaviour of allylpalladium(II) complexes in THF towards molecular hydrogen under mild experimental conditions has been studied. The decomposition to palladium metal and propane is discussed in terms of the fluxionality of the allyl moiety and the stability of a proposed PdH intermediate. Reaction of allylpalladium(II) complexes with H2 and allene results in catalytic selective hydrogenation to give propene. 相似文献
8.
G. Carturan R. Ceccato R. Campostrini G. Principi U. Russo 《Journal of Sol-Gel Science and Technology》1995,4(1):49-55
The lasing photostability of the red perylimide dye (RPD) in various solid matrices was measured under frequency-doubled Nd:YAG laser excitation. The RPD: composite glass laser intensity decayed to 50% of its initial value after approximately 20,000 pump pulses of 13 mJ/pulse. The output of RPD:ormosil glass and RPD:PMMA glass lasers decayed to 50% of their initial value after 1,200 and 1,000 pump pulses of the same energy, respectively. For rhodamine-6G:silica-gel and rhodamine-6G:ormosil glass lasers, the 50% decay occurred already after 1,000 and 300 pulses, respectively. The decay was non-exponential, suggesting that the dye bleaching was not a single-photon process. The average laser output decay rates increased linearly with the pump energy. Singlet-singlet excited state absorption of the RPD dye in the solid matrices was also measured between 550 and 730 nm. At ~600 nm the cross section was ~2×10?16 cm2/molecule. The excited-state absorption competes with the lasing, and is a main factor that limits the laser efficiency. 相似文献
9.
M. Barbui A. Andrighetto C. Antonucci S. Carturan F. Cervellera S. Cevolani M. Cinausero P. Colombo A. Dainelli P. Di Bernardo F. Gramegna G. Maggioni G. Meneghetti C. Petrovich L. Piga G. Prete V. Rizzi M. Santana-Leitner M. Tonezzer P. Zanonato D. Zafiropoulos 《The European physical journal. Special topics》2007,150(1):275-276
A Direct Target for a mid-term RIB ISOL-type facility is being developed at LNL, in the framework of the R&D for the SPES
project [1]. Using a 40 MeV proton beam impinging on a UCx thick target of 2.5 g/cm3 density, a production rate of 1013 in target fissions per second is expected [2]. The crucial point, when short-lived isotopes are produced in the target, is
to build systems (target + ion source) with good release properties and high efficiency.
Monte Carlo simulations were performed using the GEANT4 toolkit [3] and the RIBO code [4] in order to optimize our target
geometry and to estimate the average release time. 相似文献
10.