TY - JOUR

T1 - Spectroscopic study of Ca-47 from the beta(-) decay of K-47

AU - Garnsworthy, A. B.

AU - Pore, J. L.

AU - Andreoiu, C.

AU - MacLean, A. D.

AU - Chester, A.

AU - Beadle, Z.

AU - Ball, G. C.

AU - Bender, P. C.

AU - Bildstein, V.

AU - Braid, R.

AU - Varela, A. Diaz

AU - Dunlop, R.

AU - Evitts, L. J.

AU - Garrett, P. E.

AU - Hackman, G.

AU - Ilyushkin, S. V.

AU - Jigmeddorj, B.

AU - Kuhn, K.

AU - Laffoley, A. T.

AU - Leach, K. G.

AU - Miller, D.

AU - Mills, W. J.

AU - Moore, W.

AU - Moukaddam, M.

AU - Olaizola, B.

AU - Peters, E. E.

AU - Radich, A. J.

AU - Rand, E. T.

AU - Sarazin, F.

AU - Svensson, C. E.

AU - Yates, S. W.

AU - Smith, J.K.

AU - Williams, S.J.

PY - 2020/11/11

Y1 - 2020/11/11

N2 - The β− decay of 47K to 47Ca is an appropriate mechanism for benchmarking interactions spanningthe sd and pf shells, but current knowledge of the β−-decay scheme is limited. We have performeda high-resolution, high-efficiency study of the β−-decay of 47K with the GRIFFIN spectrometer atTRIUMF-ISAC. The study revealed 48 new transitions, a more precise value for the 47K half-life(17.38(3) s), and new spin and parity assignments for eight excited states. Levels placed for thefirst time here raise the highest state observed in β− decay to within 568(3) keV of the Q-value andconfirm the previously measured large β−-decay branching ratios to the low-lying states. Previouslyunobserved β−-feeding to 3/2+ states between 4.5 and 6.1 MeV excitation energy was identified witha total β−-feeding intensity of 1.29(2)%. The sum of the B(GT) values for these states indicates thatthe 1s1/2 proton hole strength near this excitation energy is comparable to the previously known1s1/2 proton and neutron hole strengths near 2.6 MeV

AB - The β− decay of 47K to 47Ca is an appropriate mechanism for benchmarking interactions spanningthe sd and pf shells, but current knowledge of the β−-decay scheme is limited. We have performeda high-resolution, high-efficiency study of the β−-decay of 47K with the GRIFFIN spectrometer atTRIUMF-ISAC. The study revealed 48 new transitions, a more precise value for the 47K half-life(17.38(3) s), and new spin and parity assignments for eight excited states. Levels placed for thefirst time here raise the highest state observed in β− decay to within 568(3) keV of the Q-value andconfirm the previously measured large β−-decay branching ratios to the low-lying states. Previouslyunobserved β−-feeding to 3/2+ states between 4.5 and 6.1 MeV excitation energy was identified witha total β−-feeding intensity of 1.29(2)%. The sum of the B(GT) values for these states indicates thatthe 1s1/2 proton hole strength near this excitation energy is comparable to the previously known1s1/2 proton and neutron hole strengths near 2.6 MeV

U2 - 10.1103/PhysRevC.102.054314

DO - 10.1103/PhysRevC.102.054314

M3 - Article

VL - 102

SP - 054314

JO - Physical Review C

JF - Physical Review C

SN - 2469-9985

IS - 5

ER -