In nuclear fusion, a pair of light nuclei unite (or fuse) together, form a nucleus of a heavier atom . 在核聚變的情況下,一對(duì)輕核合并(或聚合)在一起,形成一個(gè)較重的原子核。
In the first place, the fractional decrease in neutron energy per collision is, on the average, greatest for light nuclei . 第一,平均來說原子核愈輕,每次碰撞后中子的能量損失分額就愈大。
A new model for light nucleus has been developed based on unified hauser - feshbach and exciton model 基于統(tǒng)一的豪澤?費(fèi)許巴赫理論和激子模型,計(jì)算中子誘發(fā)輕核反應(yīng)的新理論已經(jīng)產(chǎn)生。
Utilizing this model , the distributions of valence nucleons are calculated for some light nuclei . some new halo or skin states are predicted 利用該模型,計(jì)算了一些輕核外層核子的分布,預(yù)言了一些尚未發(fā)現(xiàn)的暈、皮核態(tài)。
In the reaction processes of light nucleus the pre - equilibrium emissions dominate the reactions mechanism , while the equilibrium state only gives lightly implement even at low neutron incident energies 在輕核反應(yīng)過程中,預(yù)平衡發(fā)射在反映機(jī)制中占主導(dǎo)地位,平衡態(tài)貢獻(xiàn)小。
Similar to the helium burning , the strong gravitational force of the star ignites and controls the carbon burning in the core ; light nuclei fuse into heavier and heavier elements , until iron 情況很像燃燒氦,強(qiáng)大的引力足以在核心燃點(diǎn)起碳,而同時(shí)維持星體穩(wěn)定。核心物質(zhì)不斷聚變?yōu)楦氐脑?,直至成為鐵。
Halo nuclei have been the hot point in the studies of nuclear physics since the discovery of the neutron halo ( or neutron skin ) in the light nuclei , such as " li , near the neutron drip line in the middle of 1980 ' s 自80年代中期~ ( 11 ) li等中子滴線附近輕核的中子暈(或中子皮)被發(fā)現(xiàn)以來,暈核一直是核物理研究的一個(gè)熱點(diǎn)。
To fit the experimental data the level broadening effect and the energy resolution must be considered . meanwhile , the residual nuclei can decay spontaneously into two clusters or carry out multi - particle break - up process , these are the characteristic for light nucleus reaction 有些反應(yīng)道可能經(jīng)由一系列不同的反應(yīng)過程,或者是兩體衰變,或者是兩體崩裂過程,甚至發(fā)生多體崩裂過程,這些都是輕核反應(yīng)的特點(diǎn)。
The results indicate that the effects of the dirac sea states are pronounced in the collective multipole excitations for nuclei , especially on the isoscalar giant modes , but become weaker for light nuclei , while the contributions on the isovector modes are negligible 在核的同位旋標(biāo)量激發(fā)模式中, dirac海負(fù)能核子態(tài)在不同的共振模式中的貢獻(xiàn)程度不一。對(duì)于同一種激發(fā)模式, dirac海負(fù)能核子態(tài)的貢獻(xiàn)隨著核子數(shù)的減少而變?nèi)酢?
Those investigations have improved one ' s understanding of the structure , formation conditions , reaction mechanisms , and excitation modes of halo nuclei . inl990 ' s it was predicted that besides the ground state of the light nuclei near the drip line , the high isospin excited states may also have halo structure 除滴線附近輕核的基態(tài)外,九十年代有人預(yù)言穩(wěn)定核的高同位旋激發(fā)態(tài)也可能具有暈結(jié)構(gòu), ~ ( 13 ) c第一激發(fā)態(tài)和~ 6li第二激發(fā)態(tài)被列為首選的研究對(duì)象。