Author/Authors :
Grinyer، نويسنده , , G.F. and Svensson، نويسنده , , C.E. and Andreoiu، نويسنده , , C. and Andreyev، نويسنده , , A.N. and Austin، نويسنده , , R.A.E. and Ball، نويسنده , , G.C. and Bandyopadhyay، نويسنده , , D. and Chakrawarthy، نويسنده , , R.S. and Finlay، نويسنده , , P. and Garrett، نويسنده , , P.E. and Hackman، نويسنده , , G. J. Hyland، نويسنده , , B. and Kulp، نويسنده , , W.D. and Leach، نويسنده , , K.G. and Leslie، نويسنده , , J.R. and Morton، نويسنده , , A.C. and Pearson، نويسنده , , C.J. and Phillips، نويسنده , , A.A. and Sarazin، نويسنده , , F. and Schumaker، نويسنده , , M.A. and Smith، نويسنده , , M.B. and Valiente-Dobَn، نويسنده , , J.J. and Waddington، نويسنده , , J.C. and Williams، نويسنده , , S.J. and Wong، نويسنده , , J. and Wood، نويسنده , , J.L. and Zganjar، نويسنده , , E.F.، نويسنده ,
Abstract :
A general technique that corrects γ -ray gated β decay-curve data for detector pulse pile-up is presented. The method includes corrections for non-zero time-resolution and energy-threshold effects in addition to a special treatment of saturating events due to cosmic rays. This technique is verified through a Monte Carlo simulation and experimental data using radioactive beams of Na 26 implanted at the center of the 8 π γ -ray spectrometer at the ISAC facility at TRIUMF in Vancouver, Canada. The β -decay half-life of Na 26 obtained from counting 1809-keV γ -ray photopeaks emitted by the daughter Mg 26 was determined to be T 1 / 2 = 1.07167 ± 0.00055 s following a 27 σ correction for detector pulse pile-up. This result is in excellent agreement with the result of a previous measurement that employed direct β counting and demonstrates the feasibility of high-precision β -decay half-life measurements through the use of high-purity germanium γ -ray detectors. The technique presented here, while motivated by superallowed-Fermi β decay studies, is general and can be used for all half-life determinations (e.g. α -, β -, X-ray, fission) in which a γ -ray photopeak is used to select the decays of a particular isotope.
