Experimental and shell-model study of the beta decay of 43Ti

Honkanen, J.; Koponen, V.; Hyvönen, Hanna; Taskinen, P.; Äystö, J.; Ogawa, K.

doi:10.1016/0375-9474(87)90095-9

Cited by 18 publications

(9 citation statements)

References 17 publications

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“…However, the range analysis was efficient at separating out a single isotope from the same I was observed as shown in the same figure. From the analysis of the spectrum, the beta-decay half life of 43Ti was determined [3] to be (503 + 8) msec, which is in good agreement with the known value for the nucleus [9]. The analysis also showed a small contribution from 42Sc because of the close (Zl.S/A 2.5) ratios for the isotones.…”

Section: Separation Of 4stisupporting

confidence: 56%

A fragment separator at LBL for the beta-NMR experiment

Matsuta

Ozawa

Nojiri

et al. 1992

Nuclear Instruments and Methods in Physics Research Section B:

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Section: Separation Of 4stisupporting

confidence: 56%

A fragment separator at LBL for the beta-NMR experiment

Matsuta

Ozawa

Nojiri

et al. 1992

Nuclear Instruments and Methods in Physics Research Section B:

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“…The ions of interest were produced via 40 Ca(α, n) 43 Ti reactions with an 18-MeV alpha beam from the MC-20 cyclotron. The measured half-life was 509(5) ms [6].…”

Section: Introductionmentioning

confidence: 94%

“…Even before the era of the ion-guide method, several studies had been performed with the helium-jet technique at the MC-20 cyclotron in Jyväskylä. Those studies included the T Z = −1 beta-delayed proton/alpha emitters 20 Na [1], 24 Al [2], 24 Al m [2], 28 P [3], 32 Cl [3], 36 K [4], 40 Sc [5] as well as the mirror nuclei 49 Mn [6], 53 Co [6], and 59 Zn [7]. After the invention of the new ion-guide method [8], these decay studies were continued at IGISOL and focused on the T Z = −1/2 mirror nuclei 43 Ti [6], 51 Fe [9], and 55 Ni [9].…”

Section: Introductionmentioning

confidence: 99%

“…A beta feeding of 5.0(13) % to a 7/2 − state at 237 keV was determined from the intensity ratio to the annihilation peak [9]. Ion-guide method was also used for a half-life determination of 43 Ti with a beta telescope [6]. The ions of interest were produced via 40 Ca(α, n) 43 Ti reactions with an 18-MeV alpha beam from the MC-20 cyclotron.…”

Section: Introductionmentioning

confidence: 99%

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Isomer and decay studies for the rp process at IGISOL

et al. 2012

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This article reviews the decay studies of neutron-deficient nuclei within the mass region A = 56 − 100 performed at the Ion Guide Isotope Separator On-Line (IGISOL) facility in the University of Jyväskylä over last 25 years. Development from He-jet measurements to on-line mass spectrometry, and eventually to atomic mass measurements and post-trap spectroscopy at IGISOL, has yielded studies of around 100 neutron-deficient nuclei over the years. The studies form a solid foundation to astrophysical rp-process path modelling. The focus is on isomers studied either via spectroscopy or via Penning-trap mass measurements. The review is complemented with recent results on the ground and isomeric states of 90 Tc. The excitation energy of the low-spin isomer in 90 Tc has been measured as Ex = 144.1(17) keV with JYFLTRAP double Penning trap and the ground state of 90 Tc has been confirmed to be the (8 + ) state with a half-life of T 1/2 = 49.2(4) s. Finally, the mass-excess results for the spin-gap isomers 53 Co m and 95 Pd m and implications from the JYFLTRAP mass measurements for the (21 + ) isomer in 94 Ag are discussed. PACS. 23.40.-s Beta decay -21.10.-k Properties of nuclei; nuclear energy levels

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“…These studies are also becoming increasingly important in the context of recent progress in large-scale shellmodel calculations, which at present are extended up to the A=65 mass region [4]. The GT-matrix elements of mirror decays have been measured with high-accuracy in the fp shell from 41 Sc up to 55 Ni [5,6,7,8,9,10,11,12]. Information on the GT strength was obtained for heavier nuclei in the fp shell [13,14,15,16].…”

Section: Introductionmentioning

confidence: 99%

β+decay of61Ga

et al. 2002

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The mirror β + -decay of 61 Ga was investigated by means of β-and γ-ray spectrometry at the ISOLDE-PSB facility using laser ionisation and mass-separation. The results for the 61 Ga half-life and the Q EC value are 168(3) ms and 9255(50) keV, respectively. The β-decay strength to the ground and low-lying excited states of the daughter 61 Zn was deduced. The experimental results are in a good agreement with large-scale shell model calculations. (Submitted to: Phys. Rev. C, November, 2001) IntroductionAccording to the experimentally proven Conserved Vector Current ( CVC ) hypothesis the Fermi (F) β decay is expected to have a constant strength for analog transitions for a given isospin multiplet, independent on the nuclear structure. The situation is quite different for the Gamow-Teller strength, B(GT), which depends on a product of the GTmatrix element < στ > and the axial-vector constant g a . The presence of the nuclear environment results in renormalisation of the free-nucleon g a axial-vector constant, determined by the neutron β decay. The GT-matrix element also varies from nucleus to nucleus. It is thus a challenge to calculate the strengths for the GT transitions with the same high accuracy as of for the F decay [1], as well as to disentangle the matrix element from the axial-vector constant from the experimentally measured B(GT). The measurement of β decays of T=1/2 mirror nuclei, characterised by a mixture of fast F and allowed GT transitions gives an unique opportunity to study the Gamow-Teller β-decay between isobaric analog states.Since the strength of the F transitions is constant for mirror transitions, the B(GT) strength can be evaluated very accurately and compared with theoretical calculations. The similarity of the wave functions for members of mirror doublets simplify theoretical calculations. Studies of mirror nuclei can therefore be used to test various theoretical models related to e.g. spin-isospin excitation modes. Moreover, the accurate measurements of the β-decay strength and the magnetic moments of the mirror states would allow to evaluate the effective axial-vector constant in a given nucleus [2].In this context the expansion of our knowledge on mirror decays for the heaviest available mirror nuclei in the fp shell is of significant importance. These studies are also becoming increasingly important in the context of recent progress in large-scale shellmodel calculations, which at present are extended up to the A=65 mass region [4]. The GT-matrix elements of mirror decays have been measured with high-accuracy in the fp shell from 41 Sc up to 55 Ni [5,6,7,8,9,10,11,12]. Information on the GT strength was obtained for heavier nuclei in the fp shell [13,14,15,16]. This paper reports on a new measurement of the mirror β + -decay of the 61 Ga nucleus (Z=31, N=30). Excited levels of the daughter nucleus 61 Zn are well known from reaction studies [17,18] and in-beam spectroscopy experiments [19,20,21,22]. The half-life of 61 Ga, produced in fragmentation reactions, was measured wi...

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Experimental and shell-model study of the beta decay of 43Ti

Cited by 18 publications

References 17 publications

A fragment separator at LBL for the beta-NMR experiment

A fragment separator at LBL for the beta-NMR experiment

Isomer and decay studies for the rp process at IGISOL

β+decay of61Ga

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