裂變中子 的英文怎麼說
中文拼音 [lièbiànzhōngzi]
裂變中子
英文
fission neutrion-
At the first start up of a new reactor, primary source rods consisted of californium - 252 are inserted into the reactor to produce sufficient neutrons to initiate the first fission
反應堆在首次啟動時,會放入含有- 252 cf - 252的一次中子源棒,以提供足夠數量的中子進行初次核裂變。The total shielding effects of the materials with certain thickness for fission neutron and - ray are all much better than iron, and the equivalent masses are lower than iron at same shielding effect
結果表明:在達到一定厚度后,這些材料對裂變中子、的總屏蔽效果均超過鐵,且相同屏蔽效果下的鐵質量當量顯著下降。Uranium fission may be accomplished by either fast or slow neutrons.
鈾的裂變可用快中子或慢中子來完成。Essentially, all the neutrons and part of the gamma rays are emitted in the actual fission process.
從根本上說,所有的中子和一部分射線都是在裂變實際的過程中放射出來的。In analyzing the neutron active detection, the neutron multiplication in the nuclear warheads induced by outer neutron source with different neutron energys is studied with numeral simulation, and the feasibility of through counting neutrons to determine the presence of high enrichment uranium ( heu ) in nuclear warhead has been proved. the method of detecting the warhead which contains heu pit by counting the released neut rons whose energy is higher than that of source neutron is studied. the feasibility of this method has been studied
對幾種主動探測核彈頭方法進行的研究中,首先對不同能量各向同性外源中子照射核彈頭的中子增殖行為進行了數值模擬,檢驗了用外源中子照射核彈頭后,通過測量瞬發中子在核彈頭中的增殖量,來證明核彈頭中高濃鈾存在的可行性;研究了用能量低於1mev的外中子源照射核彈頭,用測量核彈頭中裂變產生的高於源中子能量中子數的方法探測核彈頭,通過數值模擬分析了可行性。Many of the heaviest nuclei can be induced to break up into two fragments of intermediate size, a process called nuclear fission.
許多最重要的原子核能被誘發分裂為兩塊大小適中的碎片,這一過程稱為核裂變。Third, other nuclear quanlities ( such as fission caused by slow neutron, odd - even difference of frequency of bandcrossing etc ) were researched briefly, no other than pairing correlation, their results represented a series of odd - even differences
( 3 )對原子核的其它性質(如慢中子引起的裂變,帶交叉頻率的奇偶差等)的奇偶差也作了簡要的研究,正是由於對關聯的存在,其他性質也表現出一系列的奇偶差。A variety of biology events occur during spermatogenesis, such as self - renewal of spermatogonia, meiotic division of spermatocyte and the spermiogenesis of spermatid
生精過程中發生了許多生物學的變化,如精原細胞的自我更新,精母細胞的減數分裂和精子細胞的變形。The simulation can be divided into three processes sequentially : calculating the induced fission neutron rate of uranium and space distribution by mam - li neutron source, computing the total uranium fission neutron count rate and time distributions of 42 3he tubes, and calculating the neutron coincidence counting rate
第一步,以ain ? li源為中子源,計算鈾的誘發裂變中子產生二率及空間分佈;第二步,以鈾的誘發裂變中子為中子源,計算化根』 ne管的總中子計數率及時間分佈;第三步,計算中子符合計數率。Neutron fluence measurement - part 6 : fast - neutron fluence determination with thorium fission detectors
中子注量測量.第6部分:用釷裂變探測器測定快中子注量The error source in measuring neutron fluence rate is gived. the efficiency of u - fission chamber is studied. the effect factors to detector are analyzed and experimentally studied
開展了鈾裂變室探測器效率的研究,對影響探測器對期望中子或非期望中子探測的各種因素進行了分析和實驗研究。The bisonc burnup library is replaced to facilitate the computation of the burnup process with complicated burnup chains. we have made and evaluated the new library ( hendl ) which contains 139 kinds of nuclides with 175 groups for neutron and 42 groups for gamma, 15 kinds of neutron reactions and p0 - p5 expansion. the revised code which we call bus - id is more adaptable to the computation of hybrid reactor for its fuel breeding and the transmutation of the hlw
並且在一維輸運及燃耗計算程序bisonc的基礎上,提出用新的數據庫( hendl )代替原有的bisonc數據庫, hendl庫考慮了更加全面的燃耗過程和多種燃料循環方式,通過修正讀入的核截面數據庫中的參數,考慮共振自屏效應,製作並且評估了新的含有139種核素、多種反應截面、 175群中子42群光子、 p _ 0 - p _ 5展開的中子反應數據庫,開發出新的程序bus - 1d ,使得更能適應聚變?裂變混合堆的燃料增殖、高放長壽命核廢料( hlw )的嬗變等計算的要求。The results of numeral simulation show that the higher - energy neutrons counting rate is quite low, it requires more counting time or much stronger low energy neutron source to detect the reliable signals
計算結果表明,核彈頭裂變產生的較高能的中子數很少,需要較長的時間或較強的低能中子源才能探測到可靠的信號。The nuclear fissile reaction system, which provides nuclear energy or neutrons, theoretically demands its criticality safety and neutron energy spectrum to be predicated. generally, those are realized by calculating the k - eigenvalue problem
對于提供核能源或中子源的核裂變反應系統,需從理論上給出它的臨界安全性和中子能譜,通常通過k本徵值問題的計算來實現。Cadmium has the ability to absorb neutrons, so it is used as a barrier to control nuclear fission
鎘有吸收中子的能力,所以它被用作防止核裂變的屏障。Fission and fusion, the sources of large-scale nuclear energy, deserve more than passing notice in a modern survey of physics.
裂變和聚變是大規模原子核能之源,在物理學的現代概觀中值得注意而不是予以忽視。In addition, somewhat less than 1 percent of the fission neutrons, called the "delayed" neutrons, are emitted subsequently.
此外,還有一些約少於1的叫做「緩發」中子的裂變中子,隨后被發射出來。The fds ( fusion - driven sub - critical system ) can realize the transmutation of hlw ( high level waste ), fuel production, energy breeding and tritium production by utilizing the external neutron source to make the reactor operated under the sub - critical state
聚變中子源驅動的次臨界核能系統( fds )是根據聚變和裂變反應的各自特點,利用外源中子進入包層的次臨界系統,實現增殖燃料、增益能量、產氚和嬗變核廢料等功能。In addition, considering the essential characteristics of the fusion - fission hybrid reactor, the preliminary analysis and research of the mhd pressure drop of liquid metal that flow through the fuel packed pebble bed - based blanket are given
另外,基於聚變中子源驅動的次臨界清潔核能系統,針對聚變?裂變嬗變混合堆的本質特點,對液態金屬球床包層進行初步地探討和研究,進行了球床液態金屬溢流的磁流體動力學流動的建模分析和計算。The liquid metal pb - 17li flow through a packed pebble bed - based blanket is considered to be one of the blanket candidates. the mhd pressure drop of liquid metal flow through the packed pebble bed has been calculated and analyzed under various conditions including ( a ) the size of the packed pebbles ; ( b ) the ratio of occupied room by the packed pebbles to that of liquid metal ; and ( c ) whether the pebbles surface is insulated or not
在聚變中子源驅動的次臨界清潔核能系統的科學可行性和技術現實性基礎上,對聚變?裂變嬗變混合堆的多種概念性包層進行探討,對影響液態金屬在球床包層中的mhd壓降的相關因素(包括燃料小球的大小、液態金屬與燃料小球的占空比和燃料小球表面是否絕緣)進行分析研究。分享友人