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The SNAP 27 Gamma Radiation Spectrum Obtained with a Ge(Li) Detector

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1 Author(s)
Taherzadeh, M. ; Nuclear Power Sources Group Spacecraft Power Section

The pulse height distribution, obtained experimentally using a Ge(Li) detector, was employed to determine the photon emission rate characteristic of a PuO2 fuel source known as the SNAP 27 heat source. The selfshielding parameters of the photon emitter, the efficiency of the detector and the geometry of the experiment were utilized to determine the unscattered photon emission rate of the source and the unscattered flux spectrum at a certain specified distance from the source. For the scattered part of the flux spectrum a Monte Carlo technique was employed so that the total flux spectrum could be determined at any point in the radiation field. As a result of this work, a technique was developed to obtain the unfolded radiation spectrum of the SNAP 27 heat source.

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Nuclear Science, IEEE Transactions on  (Volume:23 ,  Issue: 3 )