In-beam Measurement of β+ Delay Particle Decay on RIBLL
- Received Date: 2000-04-13
- Accepted Date: 1900-01-01
- Available Online: 2001-05-05
Abstract: The in beam measurement of β+ delay α decay of 20Na on the Radioactive Ion Beam Line in Lanzhou(RIBLL) is reported. The radioactive ion 20Na was identified in beam by means of TOF-ΔE method. The implantation depth of the secondary beam in the detectors was optimized by a group of degraders with different thickness. The procedure of data acquisition was divided into two stages, i.e., in beam and off beam stage, to record the RIB and the β+ delay α particles respectively. Four resonant energy levels, 2.69, 3.09, 4.74, and 5.54MeV of 20Ne, have been observed with their relative amplitudes of 100, 4.15, 1.10 and 15.2, respectively. The half life of 20Na—→β+ 20Ne*→16O+α decay is preliminarily determined to be 459ms by using a time scaler combined with a pulse generator. The results are in good agreement with the ones of other group.