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ljtlovexs

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[求助] MCNP中模拟的问题已有1人参与

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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tys4312

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ljtlovexs: 金币+5, ★★★很有帮助 2017-02-28 21:41:40
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
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