Properties of low-lying intruder states in {sup 34}Al and {sup 34}Si populated in the beta-decay of {sup 34}Mg

Journal Article · Tue Feb 24 00:00:00 EST 2015 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.4909602· OSTI ID:22390997

Lică, R. ^[1]; Rotaru, F.; Negoită, F.; Mărginean, N.; Borcea, C.; Borcea, R.; Călinescu, S.; Filipescu, D.; Gheorghe, I.; Ghită, D. G.; Mărginean, R.; Mihai, C.; Negret, A.; Pietreanu, D.; Sava, T.; Stănoiu, M.; Şuvăilă, R.; Toma, S. ^[2]; Grévy, S. ^[3]; Desagne, Ph. ^[4] ; others, and

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1. Horia Hulubei National Institute for Physics and Nuclear Engineering, IFIN-HH, P.O.B. MG-6, 077125 Magurele, Romania and ISOLDE/CERN, Geneva (Switzerland)
2. Horia Hulubei National Institute for Physics and Nuclear Engineering, IFIN-HH, P.O.B. MG-6, 077125 Magurele (Romania)
3. CENBG, Université de Bordeaux, CNRS/IN2P3, Chemin du Solarium, 33175 Gradignan Cedex (France)
4. IPHC, Université de Strasbourg, IN2P3/CNRS, BP28, F-67037 Strasbourg Cedex (France)

The results of the IS530 experiment at ISOLDE revealed new information concerning several nuclei close to the N ≈ 20 'Island of Inversion' - {sup 34}Mg, {sup 34}Al, {sup 34}Si. The half-life of {sup 34}Mg was found to be three times larger than the adopted value (63(1) ms instead of 20(10) ms). The beta-gamma spectroscopy of {sup 34}Mg performed for the first time in this experiment, led to the first experimental level scheme for {sup 34}Al, also showing that the full beta strength goes through the predicted 1{sup +} isomer in {sup 34}Al [1] and/or excited states that deexcite to it. The subsequent beta-decay of the 1{sup +} isomer in {sup 34}Al allowed the observation of new gamma lines in {sup 34}Si, (tentatively) associated with low-spin high-energy excited states previously unobserved.

• OSTI ID: 22390997
• Journal Information: AIP Conference Proceedings, Vol. 1645, Issue 1; Conference: Carpathian Summer School of Physics 2014, Sinaia (Romania), 13-26 Jul 2014; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ALUMINIUM 34
BETA DECAY
EXCITED STATES
GAMMA SPECTROSCOPY
HALF-LIFE
ISOMERIC NUCLEI
MAGNESIUM 34
NUCLEAR STRUCTURE
SILICON 34
SPIN