High precision measurements of Na-26 beta(-) decay

Grinyer, GF; Svensson, CE; Andreoiu, C; Andreyev, AN; Austin, RAE; Ball, GC; Chakrawarthy, RS; Finlay, P; Garrett, PE; Hackman, G; Hardy, JC; Hyland, B; Iacob, VE; Koopmans, KA; Kulp, WD; Leslie, JR; Macdonald, JA; Morton, AC; Ormand, WE; Osborne, CJ; Pearson, CJ; Phillips, AA; Sarazin, F; Schumaker, MA; Scraggs, HC; Schwarzenberg, J; Smith, MB; Valiente-Dobon, JJ; Waddington, JC; Wood, JL; Zganjar, EF

doi:10.1103/PhysRevC.71.044309

High precision measurements of Na-26 beta(-) decay

Author:

Grinyer, GF

Svensson, CE ; Andreoiu, C ; Andreyev, AN ; Austin, RAE ; Ball, GC ; Chakrawarthy, RS ; Finlay, P ; Garrett, PE ; Hackman, G ; Hardy, JC ; Hyland, B ; Iacob, VE ; Koopmans, KA ; Kulp, WD ; Leslie, JR ; Macdonald, JA ; Morton, AC ; Ormand, WE ; Osborne, CJ ; Pearson, CJ ; Phillips, AA ; Sarazin, F ; Schumaker, MA ; Scraggs, HC ; Schwarzenberg, J ; Smith, MB ; Valiente-Dobon, JJ ; Waddington, JC ; Wood, JL ; Zganjar, EF

Keywords:

ENERGY-LEVELS, HALF-LIVES, ISOTOPES, MAGNESIUM, NUCLEI, NA26, Science & Technology, Physical Sciences, Physics, Nuclear, Physics, ISOTOPE, 0202 Atomic, Molecular, Nuclear, Particle and Plasma Physics, Nuclear & Particles Physics, 5106 Nuclear and plasma physics

Abstract:

High-precision measurements of the half-life and beta-branching ratios for the beta(-) decay of Na-26 to Mg-26 have been measured in beta-counting and gamma-decay experiments, respectively. A 4 pi proportional counter and fast tape transport system were employed for the half-life measurement, whereas the gamma rays emitted by the daughter nucleus Mg-26 were detected with the 8 pi gamma-ray spectrometer, both located at TRIUMF's isotope separator and accelerator radioactive beam facility. The half-life of Na-26 was determined to be T-1/2=1.07128 +/- 0.00013 +/- 0.00021 s, where the first error is statistical and the second systematic. The logft values derived from these experiments are compared with theoretical values from a full sd-shell model calculation.