A
斯捷夫·布朗金斯把笔记本放在飞船主机的控制台上,以便进行最后的计算。豆大的汗珠在他额头上闪闪发亮,就像仪表板上的信号灯一样。
斯捷夫算得手忙脚乱,他在所得数字下面画上一条粗线,打算再直接口算出它的平方,但是数字过大...A
斯捷夫·布朗金斯把笔记本放在飞船主机的控制台上,以便进行最后的计算。豆大的汗珠在他额头上闪闪发亮,就像仪表板上的信号灯一样。
斯捷夫算得手忙脚乱,他在所得数字下面画上一条粗线,打算再直接口算出它的平方,但是数字过大,已经超出他力所能及的范围了。斯捷夫想了想,只好重新拿起铅笔。展开更多
Calculation of moderator analogues for 14 MeV neutrons as source were made at a IBM/PC AT computer using TAMAKER-ANISN program and 46 groups (25 neutron groups, 21 photon groups) UW cross section data. The intensifyin...Calculation of moderator analogues for 14 MeV neutrons as source were made at a IBM/PC AT computer using TAMAKER-ANISN program and 46 groups (25 neutron groups, 21 photon groups) UW cross section data. The intensifying effect of lead and natural uranium for moderating 14 MeV neutrons is confirmed. Adopting proper structure of the moderator, the intensifying factor M (times) may be larger than 3. Using lead and natural uranium in sub-critical assemblies (or call boosters),with 14 MeV neutrons as source, with the same dimension as that of above, the intensifying effect is also condrmed. With a proper structure of sub-critical assembly,the intensifying factor M may be close to or eved larger than (1 - k)-1 where k isthe effective multiplication factor.展开更多
文摘Calculation of moderator analogues for 14 MeV neutrons as source were made at a IBM/PC AT computer using TAMAKER-ANISN program and 46 groups (25 neutron groups, 21 photon groups) UW cross section data. The intensifying effect of lead and natural uranium for moderating 14 MeV neutrons is confirmed. Adopting proper structure of the moderator, the intensifying factor M (times) may be larger than 3. Using lead and natural uranium in sub-critical assemblies (or call boosters),with 14 MeV neutrons as source, with the same dimension as that of above, the intensifying effect is also condrmed. With a proper structure of sub-critical assembly,the intensifying factor M may be close to or eved larger than (1 - k)-1 where k isthe effective multiplication factor.
