nuclear matter 中文意思是什麼
nuclear matter
解釋
核材料-
There has been many papers to discuss the in - medium quark and gluon condensates in nuclear matter which use the models with su ( 2 ) l su ( 2 ) r sym - metry. now, we make use of the chiral model su ( 3 ) l su ( 3 ) n including the baryon octet to discuss the quark condensate < qq > in strange matter, where q is an up or down quark field. on the one hand, from the experimetal data, it is found that < qq > vac = - ( 225 25mev ) 3, on the other hand, with the hellmann - feynman theorem, quark condensate can be evaluated on the hadronic level. in this paper, we will investigate the quark condensate in strange matter with the chiral symmetry su ( 3 ) l x su ( 3 ) rspontaneous breaking lagrangian to obtain the variation of the quark condensate in the strange matter when the baryon number change. it can be applied to understand the neutron stars when the neutron star are considered to be constructed by the strange matter. because nertron stars are homogeneous and at very low temperature, we will use the mean - field approximation and zero temperature throughout this paper
鑒于已有大量文獻討論了核物質中的夸克凝聚，本文將討論在奇異物質中的夸克凝聚。而在介質中的夸克凝聚的基本公式可由hellmann - feynman理論導出，所以運用手征對稱自發破缺拉氏量以及平均場近似，我們就可以討論在奇異物質中的夸克凝聚，由所計算的結果表明： （ 1 ）奇異物質中的夸克凝聚隨奇異物質密度的增大而單調減小。 （ 2 ） -凝聚的出現對衰減率有影響。 -
They should wear eyeshade, drag a rope with a rubber band on it and then pick up the nuclear matter with it, but can ' t touch the n - pollution area and must make sure the water not overflow
每個小組指派4個成員作為特種部隊成員，他們需戴上眼罩，然後特種部隊成員每人牽著一根繩子（中間套上一個橡皮筋） ，去把核物質取出，但是不能接觸禁區，杯子中的水也不能溢出。 -
As for the k production in high energy hics, we firstly study k + production. the results show that the kaon flow is sensitive to both the kaon - nucleon sigma term ( s and the equation of state of nuclear matter. the collective flows of both nucleons and k + mesons need a " soft " eos with compressibility k ? 00 - 300 mev, and 2 = 200 - 400 mev seems suitable to explain the measured k + flow
研究表明k ~ +集體流在相對論重離子碰撞中對核態方程和k - n標量吸引項（ _ （ kn ） ）都是敏感的，計算結果表明核子和k ~ +介子的橫向集體流都需要壓縮系數在k 200 - 300mev范圍內較軟的核態方程，而大約為200 - 400mev的_ （ kn ）值對解釋k ~ +流產生是合適的。 -
The quark energy loss of fast quarks in nuclear matter
高能夸克在核環境中的能量損失 -
Remaining at the center of the vela supernova remnant is a pulsar, a star as dense as nuclear matter that completely rotates more than ten times in a single second
船帆座超新星爆炸遺骸的中心還存在著一顆脈沖星，它是一顆如原子般緻密的天體，一秒鐘可以自轉十次以上。 -
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確地再現出dbhf計算的核狀態方程以及密度依賴的不對稱能，我們採用第二種萬法提取有效介子核子耦合常數，即要求在對稱核物質中，每個密度處ilif計算出的標量自能及總結合能與dbhf給出的標量自能及總結合能一致，提取出。 -
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的核物質中，相對論平均場（ rmf ）計算出的核子標量與矢量自能與dbhf計算出的標量與矢量自能一致，從而得到在rmf下的密度依賴的有效介子核子耦合常數，包括同位旋標量介子。 -
The criminal heavy case 2003, 2005 and so on the criminals know the crime the disease symptom fascist terror use nuclear matter to carry on the long - term murder completely
罪犯重案件2003 、 2005等罪犯全部知曉罪行的病狀法西斯恐怖使用核物質進行長期殺人。 -
The methods measuring excitation energies and temperature of highly excited nuclear matter and their reliability have been summarized
摘要評述了高激發核的激發能及核溫度的測量方法，以及這些測量方法的可靠性。 -
Meanwhile we find that decay constant fn and the tt mass mv monotonously decrease as nuclear matter density increases
我們同時發現介子的衰變常數f _和質量m _隨著核物質密度_ n的增加而單調遞減。 -
Using the effective action we got in a nuclear matter, we calculate the decay constant / ? and tt mass m - jf as functions of the chemical potential
利用我們得到的核物質中的有效作用量，我們計算了介子的衰變常數和質量，他們都是化學勢的函數。 -
The conditional moment correlations and distributions in hot nuclear multi - fragmentation are reviewed and investigated. the signals of liquid - gas phase transition in nuclear matter are discussed
摘要評述和研究了熱核多重碎裂中的條件矩關聯與分佈，並討論了核內液氣相變的信號。 -
A significant difference on the scalar self - energy and effective mass of neutrons in asymmetric nuclear matter, especially in neutron matter, is observed. the difference would result in an unreasonable sigh of the extracted effective couplings for isovector mesons
利用這樣的耦合常數在rmf近似下計算的核物質的結合能與dbhf結果會有偏離，因而得到的核狀態方程也會有偏離，如在飽和點處結合能有小於2的偏差。 -
So the thermodynamic properties of nuclear matter could be studied
在此基礎上就可以討論核物質的相關熱力學性質。 -
However, it is still a difficult problem how a nuclear matter background could be taken into account
但是，如何將核物質背景考慮近來，這仍然是理論物理研究中的一個難題。 -
Shortcomings observed in other methods are removed and a satisfactory description of symmetric nuclear matter is reached
這種辦法消除了其它方法的弊端，並對對稱核物質性質給出了較好的描述。 -
And based on these findings, we further study the dependence of nuclear stopping on system size, initial n / z, sp and the medium correction of two - body cross sections. it ' s found that the effect of initial n / z ratio and isospin sp on stopping is weak, and the excitation function of stopping depends on the form of medium correction of two - body cross sections and the equation of state of nuclear matter strongly
在此基礎上我們研究了核阻止本領對系統大小、初始核n / z 、平均場中對稱勢以及兩體散射截面介質修正等的依賴情況，研究結果表明它受初始核n / z比以及對稱勢的影響很弱，而受碰撞截面介質修正的同位旋依賴效應及核態方程影響明顯。 -
This study adopts the monte - carlo general software - mcnp to compute and analyze the effect of movement of the nuclear matter on the minimum detectable limit of the nuclear radiation detector array
文章通過建立蒙特卡羅模型並應用通用軟體mcnp程序分析計算核材料的移動對核輻射探測器陣列探測下限的影響。 -
In the frame of gcm, by introducing the chemical potential of baryons in this paper, we have found an effective method to study some properties of tt meson in a nuclear matter with finite density
在gcm理論框架下通過將化學勢引入雙定域場和有效作用量，本文找到一種有效的方法研究介子在有限密度核物質中的一些性質。 -
It is widely known that the relativistic mean field ( rmf ) method is rather successful in the researches of nuclear matter, finite nuclei and other fields. in our paper, we use the basical spirit of rmf in practical calculation
鑒于相對論平均場（ rmf ）理論在對核物質，有限核，以及其他領域研究中的運用取得了較大的成功，在本文的實際計算中，我們亦採用相對論平均場的思想。
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