justification of the required time: tas
DESCRIPTION
Justification of the required time: TAS. No of shifts : time required to have a minimum wish of 10 6 useful counts, taking into account the impurity of the beam, the EC/(EC+alpha) ratio, the planar efficiency (0.1), the K α flourescence yield of 0.49, and a rate of 5E3 counts/sec in the TAS. - PowerPoint PPT PresentationTRANSCRIPT
Justification of the required time: TAS
A 188 190 192
Tl(RILIS) 5.0E07 7.0E07 9.0E07
Tl(W) 2.5E06 3.5E06 4.5E06
Pb(RILIS) 1.5E06 1.5E07 4.0E07
Ratio Pb/Tl 0.60 4.29 8.89
% of Pb 37.5 81.1 89.9
No of shifts 0.47 0.17 0.15
No of shifts: time required to have a minimum wish of 106 useful counts, taking into account the impurity of the beam, the EC/(EC+alpha) ratio, the planar efficiency (0.1), the Kα flourescence yield of 0.49, and a rate of 5E3 counts/sec in the TAS
Justification of the required time: coincidence of TAS&β-delayed particles
No of required shifts: 3.0 for 188Pb
9.2 h is the time required to have a minimum wish of 2x103 useful counts, assuming a branching ratio of 10-5, and efficiency of 0.3 for a particle detector and a counting rate of 10 000 counts/s in the TAS
Justification of the required time: high resolution measurement for 188Pb
No of required shifts: 2
Assuming using 3 Ge detectors with efficiencies of ~ 0.01, a transmission of 0.5 up to the high resolution setup and the typical ISOLDE current of 2μA