Verifying the accuracy of the TITAN Penning-trap mass spectrometer

Brodeur, M.; Ryjkov, V. L.; Brunner, T.; Ettenauer, S.; Gallant, A. T.; Simon, Vanessa V.; Smith, M.; Lapierre, A.; Ringle, R.; Delheij, P. P. J.; Good, M.; Lunney, D.; Dilling, J.

doi:10.1016/j.ijms.2011.11.002

Cited by 62 publications

(71 citation statements)

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“…an RFQ linear Paul trap [27,28] for buffer-gas cooling and bunching the low-energy ion beam, (ii) a 3.7 T, highprecision mass-measurement Penning-trap (MPET) [29], and (iii) an electron-beam ion trap (EBIT) which provides highly charged ions (HCIs) [30].…”

Section: Titanmentioning

confidence: 99%

In-Trap Spectroscopy of Charge-Bred Radioactive Ions

et al. 2014

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A novel in-trap decay spectroscopy facility has been developed and constructed for use with TRIUMF's Ion Trap for Atomic and Nuclear science (TITAN). This apparatus consists of an open-access spectroscopy ion-trap, which is surrounded radially with up to seven low-energy planar Si(Li) detectors. The ion-trap environment allows for the detection of low-energy photons by providing backing-free storage of the radioactive ions, while guiding decay particles from the trap center via the strong (up to 6 T) magnetic field. Excellent ion confinement is also facilitated by the use of an intense electron beam which provides storage times of minutes or more without ion loss. These advantages, along with careful monitoring and control, provide a significant increase in sensitivity for the detection of X-rays from the electron-capture process. The design, development, and commissioning of this apparatus are presented and the future of the device and experimental technique are discussed.Keywords: in-trap decay spectroscopy, electron capture, beta-decay of highly-charged ions, X-ray detection, electron-beam ion trap, nuclear matrix elements, double beta decay

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Section: Titanmentioning

confidence: 99%

In-Trap Spectroscopy of Charge-Bred Radioactive Ions

et al. 2014

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“…The TITAN facility consists of four primary components: (i) A Radio-Frequency Quadrupole (RFQ) linear Paul trap [27,28], (ii) a Multi-Reflection Time-of-Flight (MR-ToF) isobar separator [29], iii) an Electron-Beam Ion Trap (EBIT) for generating Highly Charged Ions (HCIs) [30,31] and performing decay spectroscopy [32,33], and (iv) a 3.7 T, high-precision mass Measurement PEnning Trap (MPET) [34]. Following the delivery of the continuous A = 22 ISAC beam to TITAN, ions were injected into the RFQ where they were cooled using a He buffer gas.…”

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confidence: 99%

“…The measured frequency ratios, as well as the error budgets for each systematic in the TITAN system, are given in Table I, based largely on the studies of Refs. [34].…”

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High-precision QEC -value measurement of the superallowed β+ emitter Mg22 and an ab

Reiter
¹
,

Leach
²
,

Drozdowski
³

et al. 2017

Phys. Rev. C
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“…The TITAN system has been established with mass measurements of halo nuclei [23][24][25]30] as well as with measurements of short-lived, highly-charged ions [31]. The precision and accuracy of the TITAN Penning trap has been studied in detail [32,33].…”

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Elucidation of the AnomalousA=9Isospin Quartet Behavior
Brodeur
¹
,
Brunner
²
,
Ettenauer
³

et al. 2012
Phys. Rev. Lett.
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Recent high-precision mass measurements of 9 Li and 9 Be, performed with the TITAN Penning trap at the TRIUMF ISAC facility, are analyzed in light of state-of-the-art shell model calculations. We find an explanation for the anomalous Isobaric Mass Multiplet Equation (IMME) behaviour for the two A = 9 quartets. The presence of a cubic d = 6.3(17) keV term for the J π = 3/2 − quartet and the vanishing cubic term for the excited J π = 1/2 − multiplet depend upon the presence of a nearby T = 1/2 state in 9 B and 9 Be that induces isospin mixing. This is contrary to previous hypotheses involving purely Coulomb and charge-dependent effects. T = 1/2 states have been observed near the calculated energy, above the T = 3/2 state. However an experimental confirmation of their J π is needed.PACS numbers: 21.10. Dr,21.10.Hw,27.20.+n Atomic nuclei are described by their binding energy and three quantum numbers: the total angular momentum J, parity π, and isospin T . This framework allows one to identify, each of the ∼ 3000 observed nuclei [1] unambiguously. The isospin quantity is analogous to spin and was first introduced by Heisenberg [2] to describe the charge-independence of the nuclear force. Within the isospin formalism, neutrons (n) and protons (p) are nucleons of isospin T = 1/2 but distinguished by different z-projections T z (n) = 1/2 and T z (p) = -1/2 [2,3]. Nuclei with the same mass number A, total angular momentum and parity form multiplets where the individual members have a projection T z = (N − Z)/2. Assuming isospin is a good quantum number, members of an isobaric multiplet have identical properties. However, Weinberg and Treiman [4] noted that the mass excess ∆ (which is a measure of the nuclear binding energy and defined as the difference between the atomic mass and the atomic mass number) of such nuclides were not identical, but were rather laying along a parabola:where a, b, c are coefficients that depend on all quantum numbers except T z . This so-called isobaric multiplet mass equation (IMME) has proven to be a powerful tool to predict unknown masses. For instance, it is used to obtain masses of nuclei along the rapid proton capture path, where most of the masses are not well known [5] or to provide detailed mass values, which are experimentally inaccessible due to half-life and productions constraints [6]. Recently, the precise mass measurement of 12 Be [7] using the TITAN (TRIUMF Ion Traps for Atomic and Nuclear science) Penning trap mass spectrometer [8,9] has been used as a solid anchor point together with the IMME to address the ambiguous spin assignment of T = 2 states in 12 C and 12 Be.Several tests of the IMME were performed and for most cases, it has followed the original quadratic behaviour [10]. However, in some cases, large deviations were discovered and the incorporation of cubic d(A, T )T [17,18] quintets. The unveiling of the non-quadratic behaviour of the A = 32 and 33 multiplets was only possible due to the precise and accurate mass measurement of some of its members, at the δm/m ∼...

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Verifying the accuracy of the TITAN Penning-trap mass spectrometer

Cited by 62 publications

References 54 publications

In-Trap Spectroscopy of Charge-Bred Radioactive Ions

In-Trap Spectroscopy of Charge-Bred Radioactive Ions

High-precision QEC -value measurement of the superallowed β+ emitter Mg22 and an ab

Elucidation of the AnomalousA=9Isospin Quartet Behavior

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