نتایج جستجو برای: nucleus reaction
تعداد نتایج: 518289 فیلتر نتایج به سال:
Data for the scattering of 6 He, 8 He, 9 Li, and 11 Li from hydrogen are analyzed within a fully microscopic folding model of proton-nucleus scattering. Current data suggest that of these only 11 Li has a noticeable halo. For 6 He, we have also analysed the complementary reaction 6 Li(γ, π +) 6 He gs. The available data for that reaction support the hypothesis that 6 He may not be a halo nucleu...
Spectroscopic factors have been extracted for proton-rich 34Ar and neutron-rich 46Ar using the (p, d) neutron transfer reaction. The experimental results show little reduction of the ground state neutron spectroscopic factor of the proton-rich nucleus 34Ar compared to that of 46Ar. The results suggest that correlations, which generally reduce such spectroscopic factors, do not depend strongly o...
An enhancement of antiprotons produced in p + d reaction in comparison with ones in p + p elementary reaction is investigated. In the neighborhood of subthresh-old energy the enhancement is caused by the difference of available energies for antiproton production. The cross section in p + d reaction, on the other hand, becomes just twice of the one in elementary p + p reaction at the incident en...
An enhancement of antiprotons produced in p+ d reaction in comparison with ones in p+p elementary reaction is investigated. In the neighborhood of subthreshold energy the enhancement is caused by the difference of available energies for antiproton production. The cross section in p+ d reaction, on the other hand, becomes just twice of the one in elementary p+ p reaction at the incident energy f...
We investigate the degree of $\alpha$ ($^4$He nucleus) clustering in ground-state density profiles $^{44}$Ti and $^{52}$Ti. Two types distributions, shell- cluster-model configurations, are generated fully microscopically with antisymmetrized quasi-cluster model, which can describe both j-j coupling shell $\alpha$-cluster configurations a single scheme. Despite models reproducing measured charg...
- th / 9 80 30 10 v 1 4 M ar 1 99 8 Antiproton Production in p + d Reaction at Subthreshold Energies
An enhancement of antiprotons produced in p + d reaction in comparison with ones in p + p elementary reaction is investigated. In the neighborhood of subthresh-old energy the enhancement is caused by the difference of available energies for antiproton production. The cross section in p + d reaction, on the other hand, becomes just twice of the one in elementary p + p reaction at the incident en...
1n"a relativistic heavy-ion reaction, there are many processes which contribute to fragmentation phenomenon. Here we examine two: the direct fragmentation process in which the detected proton is emitted from a parent nucleus without additional scattering, and the hard scattering process in which a nucleon from one nucleus makes a collision with a nucleon from the other nucleus. In terms of a co...
The DOPA-reaction was used to identify tyrosinase in the nucleus and cytoplasm of the neural crest melanoblast of Taricha torosa, the California newt. In this urodele there is a nuclear DOPA-positive response during the normal embryonic development from the late blastula stage to the nucleus of the early melanocyte. During the gastrula stages, all nuclei of this newt are DOPA-positive. This pos...
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