کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1879742 | 1042591 | 2007 | 4 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: The 4.438 MeV gamma to neutron ratio for the Am–Be neutron source The 4.438 MeV gamma to neutron ratio for the Am–Be neutron source](/preview/png/1879742.png)
An accurate measurement of the 4.438 MeV γγ-ray to total neutron ratio, namely R=Sγ/SnR=Sγ/Sn, for a Chinese-made Am–Be neutron source is described. The neutron strength of the source relative to a previously standardized source was determined by the manganese bath technique. The γγ-rays spectra of the source were measured using a ∅75×75∅75×75 mm NaI(Tl) detector. The background induced by neutrons and the absolute full energy peak efficiency of the detector were calculated using the MCNP code. The experimental ratio so obtained agrees well with the calculated value. A synthetic evaluated and recommended value of R=0.575±4.8%R=0.575±4.8% was given. We conclude that the experimental R-value appears an important characteristic for an Am–Be source.
Journal: Applied Radiation and Isotopes - Volume 65, Issue 12, December 2007, Pages 1318–1321