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ljtlovexs金虫 (小有名气)
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[求助]
MCNP中模拟的问题 已有1人参与
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| 求助大神，MCNP中进行模拟，设置热中子点源，点源15cm处放置半径5cm小球，球体元素设置为H，利用F8卡记录伽马绘制成H的单元素谱，发现并没有2.22MeV的特征峰出现，但是利用F4卡就可以得到，求解。 |
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【答案】应助回帖
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感谢参与，应助指数 +1
ljtlovexs: 金币+5, ★★★很有帮助 2017-02-28 21:41:40
感谢参与，应助指数 +1
ljtlovexs: 金币+5, ★★★很有帮助 2017-02-28 21:41:40
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Tally type 8 has many options. The standard F8 tally is a pulse-height tally and the energy bins are no longer the energies of scoring events, but rather the energy balance of all events in a history. In conjunction with the FT8 card (Section 5.6.17), the F8 tally can be an anticoincidence light tally, a neutron coincidence capture tally, or a residual nuclei production tally. When flagged with an asterisk, *F8 becomes an energy deposition tally. In addition, F8 can be flagged with a plus (+) to convert it from an energy deposition tally (flagged with an asterisk) to a charge deposition tally. The +F8 tally is the negative particle weight for electrons and the positive weight for positrons. The +F8:E tally can be checked against an F1:E type surface tally with the FT1:E ELC option to tally charge. |
2楼2017-02-28 09:02:48