PMID- 23679713 OWN - NLM STAT- PubMed-not-MEDLINE DCOM- 20130724 LR - 20130517 IS - 1079-7114 (Electronic) IS - 0031-9007 (Linking) VI - 110 IP - 17 DP - 2013 Apr 26 TI - Spins and magnetic moments of 49K and 51K: establishing the 1/2+ and 3/2+ level ordering beyond N = 28. PG - 172503 AB - The ground-state spins and magnetic moments of (49,51)K have been measured using bunched-beam high-resolution collinear laser spectroscopy at ISOLDE CERN. For 49K a ground-state spin I = 1/2 was firmly established. The observed hyperfine structure of 51K requires a spin I > 1/2 and strongly suggests I = 3/2. From its magnetic moment mu(51K) = +0.5129(22)mu(N) a spin-parity I(pi) = 3/2+ with a dominant pi1d(3/2)(-1) hole configuration was deduced. This establishes for the first time the reinversion of the single-particle levels and illustrates the prominent role of the residual monopole interaction for single-particle levels and shell evolution. FAU - Papuga, J AU - Papuga J AD - Instituut voor Kern-en Stralingsfysica, KU Leuven, B-3001 Leuven, Belgium. jasna.papuga@fys.kuleuven.be FAU - Bissell, M L AU - Bissell ML FAU - Kreim, K AU - Kreim K FAU - Blaum, K AU - Blaum K FAU - Brown, B A AU - Brown BA FAU - De Rydt, M AU - De Rydt M FAU - Garcia Ruiz, R F AU - Garcia Ruiz RF FAU - Heylen, H AU - Heylen H FAU - Kowalska, M AU - Kowalska M FAU - Neugart, R AU - Neugart R FAU - Neyens, G AU - Neyens G FAU - Nortershauser, W AU - Nortershauser W FAU - Otsuka, T AU - Otsuka T FAU - Rajabali, M M AU - Rajabali MM FAU - Sanchez, R AU - Sanchez R FAU - Utsuno, Y AU - Utsuno Y FAU - Yordanov, D T AU - Yordanov DT LA - eng PT - Journal Article DEP - 20130423 PL - United States TA - Phys Rev Lett JT - Physical review letters JID - 0401141 EDAT- 2013/05/18 06:00 MHDA- 2013/05/18 06:01 CRDT- 2013/05/18 06:00 PHST- 2013/02/14 00:00 [received] PHST- 2013/05/18 06:00 [entrez] PHST- 2013/05/18 06:00 [pubmed] PHST- 2013/05/18 06:01 [medline] AID - 10.1103/PhysRevLett.110.172503 [doi] PST - ppublish SO - Phys Rev Lett. 2013 Apr 26;110(17):172503. doi: 10.1103/PhysRevLett.110.172503. Epub 2013 Apr 23.