Experimental measurements of neutron fluxes produced by proton beams (23–80 MeV) on Be and Pb targets
✍ Scribed by I. Tilquin; P. Froment; M. Cogneau; Th. Delbar; J. Vervier; G. Ryckewaert
- Publisher
- Elsevier Science
- Year
- 2005
- Tongue
- English
- Weight
- 185 KB
- Volume
- 545
- Category
- Article
- ISSN
- 0168-9002
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✦ Synopsis
The ''manganese bath'' technique has been perfected to measure the total number of neutrons emitted when 23-80 MeV proton beams bombard a beryllium target. It consists in surrounding the neutron source with a large metallic cylinder filled with a manganese sulphate (MnSO 4 ) solution. The neutrons are slowed down by water and partly captured by manganese (production of 56 Mn; T 1=2 ¼ 2:6 h). The absolute calibration has been performed with a Ra-Be neutron source. Corrections have been applied for escaping neutrons in both cases. Our experimental results show that the total number of neutrons produced (S 0 ) by the p+Be reaction, per second and per microampere of beam, can be approximated (for proton energy E p between 23 and 80 MeV) by: S 0 ¼ 5:58 Â 10 8 (E p [MeV]) 1.69 . Some measurements have also been done with a lead target.