Neutron Capture Cross Section Measurement on $^{238}$Pu at DANCE

Chyzh, A ; Wu, C Y

Lawrence Livermore National Laboratory

关键词: Lawrence Livermore National Laboratory;    Lanl;    Plating;    Capture;    Containment;   

DOI  :  10.2172/1026477
RP-ID  :  LLNL-TR-471080
RP-ID  :  W-7405-ENG-48
RP-ID  :  1026477

美国|英语

来源: UNT Digital Library

【 摘 要 】

The proposed neutron capture measurement for {sup 238}Pu was carried out in Nov-Dec, 2010, using the DANCE array at LANSCE, LANL. The total beam-on-target time is about 14 days plus additional 5 days for the background measurement. The target was prepared at LLNL with the new electrplating cell capable of plating the {sup 238}Pu isotope simultaneously on both sides of the 3-{micro}m thick Ti backing foil. A total mass of 395 {micro}g with an activity of 6.8 mCi was deposited onto the area of 7 mm in diameter. The {sup 238}Pu sample was enriched to 99.35%. The target was covered by 1.4 {micro}m double-side aluminized mylar and then inserted into a specially designed vacuum-tight container, shown in Fig. 1, for the {sup 238}Pu containment. The container was tested for leaks in the vacuum chamber at LLNL. An identical container without {sup 238}Pu was made as well and used as a blank for the background measurement.