New structure information on Mg-30, Mg-31 and Mg-32

Summary, in English

The fast timing beta gamma gamma(t) method was applied to investigate the level lifetimes in Mg-30,Mg-31,Mg-32. Levels in Mg have been populated in beta and beta-delayed neutron emission of Na, at the ISOLDE facility. From the gamma gamma coincidences a number of new states have been identified and new level schemes were constructed for 30 31,32 Mg. The following preliminary half lives have been determined: T-1/2 = 3.9(4) ns for the 1789 keV state in Mg-30, T-1/2 = 133(8) ps and 10.5(8) us for the 221 keV and 461 keV states in Mg-31, respectively, and T1/2 = 16(4) ps for the 885 keV level in 32Mg. The 1789 keV level was established as a candidate for the intruder 0(+) configuration in Mg-30 with a possible strong E0 branch to the ground state.

• Author: H Mach; LM Fraile; O Tengblad; R Boutami; C Jollet; WA Plociennik; DT Yordanov; M Stanoiu; MJG Borge; PA Butler; Joakim Cederkäll; P Dessagne; B Fogelberg; H Fynbo; P Hoff; A Jokinen; A Korgul; U Koster; W Kurcewicz; F Marechal; T Motobayashi; J Mrazek; G Neyens; T Nilsson; S Pedersen; A Poves; B Rubio; E Ruchowska
• Department/s: Nuclear physics
• Publishing year: 2005
• Language: English
• Pages: 105-109
• Publication/Series: European Physical Journal A. Hadrons and Nuclei
• Volume: 25
• Issue: Suppl 1
• Links: http://dx.doi.org/10.1140/epjad/i2005-06-159-0
• Document type: Journal article
• Publisher: Springer
• Topic: Subatomic Physics
• Status: Published
• ISBN/ISSN/Other: ISSN: 1434-6001