Electroweak Decay Studies of Highly Charged Radioactive Ions with TITAN at TRIUMF

In-trap decay spectroscopy with the TITAN facility at TRIUMF

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 st...

Radioactive decays of highly-charged ions

Acceleration of Charge Bred Radioactive Ions at Triumf

Most ion sources at ISOL (isotope separation on-line) facilities can produce only singly charged ions but efficient post acceleration requires high charge states. For light ions this can be achieved by stripping after a first moderate acceleration but with heavy ions this is no longer possible and charge state breeding is necessary. The breeder should be able to work at a high efficiency for th...

Muon Decay Parameters (TWIST experiment at TRIUMF)

The TRIUMF Weak Interaction Symmetry Test (TWIST) experiment has measured the spectrum of positrons from muon decay and determined the decay parameters: ρ = 0.75014 ± 0.00017(stat.) ± 0.00044(syst.) ± 0.00011(η), δ = 0.75067 ± 0.00030(stat.) ± 0.00067(syst.), P π µ ξ = 1.0003 ± 0.0006(stat.) ± 0.0038(syst.). The results are in good agreement with the Standard Model. Future prospects for this me...

The Standard Model in Strong Fields: Electroweak Radiative Corrections for Highly Charged Ions

Electroweak radiative corrections to the matrix elements 〈ns1/2|ĤPNC|n′p1/2〉 are calculated for highly charged hydrogenlike ions. These matrix elements constitute the basis for the description of the most parity nonconserving (PNC) processes in atomic physics. The operator ĤPNC represents the parity nonconserving relativistic effective atomic Hamiltonian at the tree level. The deviation of thes...