Absolute neutron yield determination of an accelerator neutron source by using the associated particle method
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Date
1988-05
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Türkiye Atom Enerjisi Kurumu, Çekmece Nükleer Araştırma ve Eğitim Merkezi
Abstract
Bir nötron üretecinin(Sames TB 8) mutlak 14 MeV-nötron çıkışı ortak tanecik sayma yöntemiyle saptanmıştır. 3H(d,n)4He reaksiyonunda nötronlarla birlikte ortaya çıkan alfa tanecikleri küçük ve dayanıklı bir yüzey engelli dedektörle sayılmıştır. Bu dedektörün etkin yüzeyi üzerindeki ince alüminyum kaplama sayesinde, sadece alfaları diğer reaksiyon ürünlerinden ayırmak kolaylaşmamış, 100 keV den düşük dötoron enerjilerinde düşük enerjili tanecikleri (triton, 3He-tanecikleri gibi.,) de background ve gürültüden ayırarak saymak mümkün olmuştur. Böylece, 14 MeV-nötron çıkışının duyarlı bir şekilde mutlak saptanması yanısıra, döteryum birikmesi nedeniyle oluşan trityum hedef kirlenmesi de izlenmiştir.
Karşılaştırmak amaciyle, nötron üretecinin 14 MeV-nötron çıkışı, standart madde olarak teflon ve nikel kullanılarak foil aktivasyonu yöntemi uygulanarak ta bulunmuştur. Her iki yöntemle bulunan sonuçlar deneysel belirsizlik sınırları içinde uyuşmaktadırlar.
The absolute 14 MeV neutron output of a neutron generator (Sames TB8) was determined by using the associated particle method. The alpha particles associated with neutrons from the 3H(d, n)4He reaction were counted by a small ruggedized surface barrier detector(RSBD). A thin Al-coating on the active surface of this detector provided excellent discrimination not only against the associated alphas from the other competing reaction products, but, also the low energy particles (tritons, 3He- particles) from the background or noise at low deutoron energies (<100 keV). Hence, in addition to the precise determination of the absolute 14 MeV neutron output, the total neutron output from the 2H(d, n)3He reaction which accounts for the contamination of the tritium target due to deutoron built-up was also monitored. For comparison, the 14 MeV-neutron yield of the neutron generator was also determined by the foil activation method using teflon and nickel as standart materials. The results of the both methods agreed well within the experimental uncertainties.
The absolute 14 MeV neutron output of a neutron generator (Sames TB8) was determined by using the associated particle method. The alpha particles associated with neutrons from the 3H(d, n)4He reaction were counted by a small ruggedized surface barrier detector(RSBD). A thin Al-coating on the active surface of this detector provided excellent discrimination not only against the associated alphas from the other competing reaction products, but, also the low energy particles (tritons, 3He- particles) from the background or noise at low deutoron energies (<100 keV). Hence, in addition to the precise determination of the absolute 14 MeV neutron output, the total neutron output from the 2H(d, n)3He reaction which accounts for the contamination of the tritium target due to deutoron built-up was also monitored. For comparison, the 14 MeV-neutron yield of the neutron generator was also determined by the foil activation method using teflon and nickel as standart materials. The results of the both methods agreed well within the experimental uncertainties.
Description
TENMAK D.N.. 7954
Keywords
Neutrons, Nötronlar, Neutrons -- Research, Nötronlar -- Araştırma, Neutron sources, Nötron kaynakları
Citation
Subaşı, M. (1988). Absolute neutron yield determination of an accelerator neutron source by using the associated particle method. İstanbul : Türkiye Atom Enerjisi Kurumu, Çekmece Nükleer Araştırma ve Eğitim Merkezi.