ey et pa oem . we ayy SY PO yRR he ” an & os 7 | “ EEE(c:cxurc0) Project 22.1 - Measurement of Alpha - L. F. Wouters RAFRRDGBITAL The gamma reys procuced by the nuclear reaction were detected by flucorPhotooell detectors located in a lead lines "doghouse” 1&4 fest from the sero point. A 27 foot lead pips served to coilimate the gamma rays onto en arrey of four fluors, The four fluores were positioned in tandem along the gamma path and were observed by a total of thrce photodiodes anc four photomultiplier units. Combinations cof gamma attenuators between fluorea and optical attenuators between different detector units on the same fluor ematled tie attainment of complete coverage from the 30tt generation level) to well above the peak expected gamma signal. The detector outputs vere transmitted by cable to reeording oscillo- graphs located in the blocktcouse where cameras proviced « permunent fila record of the signals. The resection history experipent was successful in measuring the high explosive transit tine and the resection rate of theSEBaxapoe) devios, ELK. Transit Tine - The high explosive trensit tise vas measured to be from the z-unit pulses to the tise of $Ott generation level of the fiseion reaction. Alpbe - Preliminary reaction history results are indicated in Mg. 22.l-] and 22;1-2, Fig. 22.1-1 is a plot of the equivalent pase Mey per second point scurce strength versus tine as obtaine) from a slope-amplitude fit of the individual pieces of deta, Pig. 22.1-2 is an alphe versus tine curve derived from Fig. 22.1-1. e ® e QES7 AVALLAELE COP got me & 8 74 SO Y, ~ a te re ONDA 29