The greatest amount of nuclear binding energy per nucleon occurs for nuclei in the vicinity of iron . 按每個核子計,最大的核結(jié)合能量出現(xiàn)在鐵附近的核中。
Binding energy per nucleon 每個核子的結(jié)合能
Binding energy per nucleon as a function of mass number total number of protons and neutrons 原子核的比結(jié)合能與質(zhì)量數(shù)質(zhì)子和中子總數(shù)的關(guān)系圖
The effective coupling constants including isoscalar and mesons and isovector and mesons in the rmf are extracted from the dbhf results in symmetric and asymmetric nuclear matter . two sets of effective interactions in the rmf approach are deduced by imposing a condition , where the dbhf scalar and . vector self - energy or scalar self - energy and binding energy per nucleon at each density and asymmetry parameter are reproduced , respectively 為了使我們提取的有效相互作用能夠準(zhǔn)確地再現(xiàn)出dbhf計算的核狀態(tài)方程以及密度依賴的不對稱能,我們采用第二種萬法提取有效介子核子耦合常數(shù),即要求在對稱核物質(zhì)中,每個密度處ilif計算出的標(biāo)量自能及總結(jié)合能與dbhf給出的標(biāo)量自能及總結(jié)合能一致,提取出。
In other words , the same amount of energy will be given off when stand - alone nucleons come together to form the nucleus . when the binding energy per nucleon is plotted against the mass number , i . e . total number of protons and neutrons in a nucleus the bottom right figure , it is found that the curve peaks around the mass number 56 , i . e . the iron nucleus 如果把原子核內(nèi)每顆核粒子的平均結(jié)合能又稱比結(jié)合能與質(zhì)量數(shù)原子核中的質(zhì)子和中子的總數(shù)繪制成圖右下圖,便可發(fā)現(xiàn)圖中曲線在質(zhì)量數(shù)大約等于56即鐵原子核時到達(dá)最高點,即是鐵原子核的總體能量最低。
The results show that binding energies per nucleon at each density and various asymmetry parameters fulfill the empirical parabolic law and the asymmetry energy is density dependent . it is found that both scalar and vector potentials of neutron in the neutron rich nuclear matter become stronger although the isospin dependence is not stronger . we compare our results with those in a simple method , where the dbhf nucleon self - energies are extracted from the momentum dependence of the single - particle energy 首先我們要求在每一個密度及各種不對稱系數(shù)的核物質(zhì)中,相對論平均場( rmf )計算出的核子標(biāo)量與矢量自能與dbhf計算出的標(biāo)量與矢量自能一致,從而得到在rmf下的密度依賴的有效介子核子耦合常數(shù),包括同位旋標(biāo)量介子。
In other words , the same amount of energy will be given off when stand - alone nucleons come together to form the nucleus . when the binding energy per nucleon is plotted against the mass number , i . e . total number of protons and neutrons in a nucleus ( the bottom right figure ) , it is found that the curve peaks around the mass number 56 , i . e . the iron nucleus 如果把原子核內(nèi)每顆核粒子的平均結(jié)合能(又稱比結(jié)合能)與質(zhì)量數(shù)(原子核中的質(zhì)子和中子的總數(shù))繪制成圖(右下圖) ,便可發(fā)現(xiàn)圖中曲線在質(zhì)量數(shù)大約等于56 (即鐵原子核)時到達(dá)最高點,即是鐵原子核的總體能量最低。