High-precision half-life determination of $$^{14}$$O via direct $$\beta $$ counting

High-precision measurement of the half-life of 62Ga

B. Blank, G. Savard, J. Döring, A. Blazhev, G. Canchel, M. Chartier, D. Henderson, Z. Janas, R. Kirchner, I. Mukha, E. Roeckl, K. Schmidt, and J. Żylicz Physics Division, Argonne National Laboratory, Argonne, IL 60439, USA; Centre d’Etudes Nucléaires de Bordeaux-Gradignan, Le Haut-Vigneau, B.P. 120, F-33175 Gradignan, France; GSI Darmstadt, Planckstrasse 1, D-64291 Darmstadt, Germany; Universit...

High - precision half - life determination for the superallowed β + emitter 62 Ga

G. F. Grinyer,1,* P. Finlay,1 C. E. Svensson,1 G. C. Ball,2 J. R. Leslie,3 R. A. E. Austin,4 D. Bandyopadhyay,1,† A. Chaffey,4 R. S. Chakrawarthy,2 P. E. Garrett,1,2 G. Hackman,2 B. Hyland,1 R. Kanungo,2,‡ K. G. Leach,1 C. M. Mattoon,5 A. C. Morton,2 C. J. Pearson,2 A. A. Phillips,1 J. J. Ressler,6 F. Sarazin,5 H. Savajols,2 M. A. Schumaker,1 and J. Wong1 1Department of Physics, University of G...

High precision half - life measurement of the superallowed β - emitter 38 Ca

We have now analyzed the results obtained from our half-life measurement of Ca. In that measurement, we produced Ca via the H(K, 2n) reaction at a primary beam energy of 30A MeV. A 99%-pure Ca beam was obtained at the focal plane of the MARS spectrometer, from which it exited the vacuum system through a 50-μm thick Kapton window, passed through a 0.3-mm-thick BC404 scintillator and a stack of a...

Measurement of the beta decay half-life of 17B.

The properties of nuclei far from stability provide a stringent test of the validity of shell model Hamiltonians derived from data for nuclei near the valley of stability. Failure of shell model calculations to extrapolate to nuclei far from stability may indicate a breakdown of symmetries assumed in the model. Such a breakdown may provide evidence for new regions of deformation as were found f...

High Precision Neutron Beta-Decay Measurements