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

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

Nuclear Physics A

Volume 471, Issues 3–4, 14 September 1987, Pages 489-500

https://doi.org/10.1016/0375-9474(87)90095-9 Get rights and content

Abstract

The beta decay of ⁴³Ti to its mirror nucleus ⁴³Sc has been studied up to 5 MeV excitation energy, representing the most detailed investigation of such a mirror decay. These experiments, employing the He-jet technique and the on-line ion guide isotope separator, IGISOL, identified seventeen gamma-rays de-exciting ten levels of ⁴³Sc. The half-life of ⁴³Ti, as determined from the high-energy β-rays of mass separated samples, was found to be 509 ± 5ms. The experimental Gamow-Teller matrix elements extracted from the data, as compared with the shell-model calculation, imply a quenching of the order of 50% for both the ground state transition and for the summed strength as well. In the calculation ⁴⁰Ca is assumed to be an inert closed core and the valence nucleons are allowed to occupy the $f_{72}, p_{32}, f_{52} and p_{12}$ orbitals.

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Cited by (19)

Nuclear Data Sheets for A = 43
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The experimental data are evaluated for known nuclides of mass number A = 43 (Al,Si,P,S,Cl,Ar,K,Ca,Sc,Ti,V,Cr). Detailed evaluated level properties and related information are presented, including adopted values of level and γ–ray energies, decay data (energies, intensities and placement of radiations), and other spectroscopic data. This work supersedes earlier full evaluations of A = 43 published by 2001Ca24 and 1990En08 (also 1978En04, and 1998En04 update).
No excited states are known in ⁴³Al, ⁴³Si and ⁴³Cr. Only one excited state is known in ⁴³V which is the probable the Isobaric Analog State (IAS) of ⁴³Cr ground state. Information for ⁴³P, ⁴³S, ⁴³Cl, ⁴³Ar and ⁴³Ti is limited; there is either no decay data available or the decay schemes are incomplete in view of large Q values and known excitations much lower than allowed by Q values. The ⁴³K, ⁴³Ca and ⁴³Sc nuclides remain the most extensively studied from many different reactions and decays.
Development and applications of the IGISOL technique
2001, Nuclear Physics A
The development and present status of the Ion Guide Isotope Separator On-Line technique is presented. Applications to nuclear physics research include decay spectroscopy of proton- and neutron-rich nuclei of refractory elements and studies of their ground-state properties by collinear laser spectroscopy. Future developments, including ion-beam manipulations by linear RFQ and Penning traps, are discussed together with high-energy applications of the IGISOL technique.
Nuclear data sheets for A = 43
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Beta decays of <sup>44</sup>V and <sup>52</sup>Co
1997, Nuclear Physics A
We have studied the prevously unknown β⁺ decay branches from ^44,44mV and ⁵²Co to particle-bound states in ⁴⁴Ti and ⁵²Fe, respectively. These intense branches populate a few states in the daughters from an excitation energy of about 1 MeV up to the isobaric analogue states at about 6 MeV. We have measured the first precise energy values for the latter states as well as the β-branching ratios to all states in this excitation energy region. We have calculated the β⁺ decay of ^44,44mV in the full fp shell model space as well as in a truncated space. Renormalized transition operators are constructed for the truncated space and tested against experimental data in ⁴⁴V and ⁵²Co. In general there is good agreement between theory and experiment for the half-lives, level energies and beta branches, but not all the states found are reproduced by the calculations.
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1994, Nuclear Physics, Section A
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A fragment separator at LBL for the beta-NMR experiment
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The Beam 44 fragment separator was built at the Bevalac of LBL for NMR studies of beta emitting nuclei. ³⁷K, ³⁹Ca, and ⁴³Ti fragments originating from ⁴⁰Ca and ⁴⁶Ti primary beams were separated by the separator for NMR studies on these nuclei. Nuclear spin polarization was created in ³⁹ and ⁴³Ti using the tilted foil technique (TFT), and the magnetic moment of ⁴³Ti was deduced. Fragment polarization was measured for ³⁷K and ³⁹Ca emitted to finite deflection angles. The beam 44 fragment separator in combination with a proper polarization technique, such as TFT or fragment polarization, has been very effective for such NMR studies.

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^☆: Supported in part by the Research Council for Natural Sciences, Academy of Finland.

¹: Present address: Finnish Centre for Radiation and Nuclear Safety, SF-00101 Helsinki, Finland.

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

Abstract

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At. Data Nucl. Data Tables

Nucl. Phys.

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Nucl. Phys.

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