BeEST collaboration meeting 2025

Session

Simulations/Systematics/New Avenues

May 14, 2025, 2:10 p.m.

Auditorium (TRIUMF)

102. A laser-abaltion ion source for off-line radioisotope loading

Thomas Brunner (McGill/TRIUMF)

2025-05-14, 2:10 p.m.

Oral invited talk

A challenge in preparing radioactive samples is the dependence on beam time at radioactive isotope facilities. One can imagine implanting large amounts of long-lived isotopes into a target at an isotope facility. The target is then brought to an offline laboratory where specific quantifies of the isotope are extracted from the target via laser ablation. The ablated ions can then be...

139. Studying systematics in BeEST with phonon-mediated detectors

Brian Lenardo (SLAC)

2025-05-14, 2:30 p.m.

Oral contributed talk

The broadening for nuclear recoils observed in BeEST’s STJ experiments is as-yet unexplained. We are working to investigate the origins of this broadening with two proposed control experiments: 1) repeating the 7Be measurements with a phonon-mediated detector, rather than direct pair-breaking, and 2) measuring nuclear recoils from gamma ray emission rather than electron captures. I will...

109. Gamma-Tagging and Future Prospects

Connor Bray (Colorado School of MInes)

2025-05-14, 2:50 p.m.

Oral invited talk

Gamma-coincidence tagging has proven to be a valuable tool for performing high-selectivity measurements of specific excited state nuclear recoils for the BeEST experiment. In this talk I present experimental concepts for further utilizing coincidence tagging in the BeEST and SALER experimental programs.

123. 7Be Decay in Al STJs

Spencer Fretwell (Colorado School of Mines)

2025-05-14, 3:10 p.m.

Oral invited talk

The nuclear broadening of the BeEST spectrum as a result of materials effects is poorly constrained. While a precise model of the recoil of dopant radioisotopes in a superconductor such as tantalum and the resulting quasiparticle dynamics in an STJ are challenging, measuring this effect in analogous aluminum-based STJs provides an experimental comparison of this effect. This talk will discuss...

103. Adaptable implantation holder design for future work

Brian Mong (SLAC)

2025-05-14, 3:30 p.m.

Oral invited talk

We will discuss the design of a more adaptable device holder for future implantations in the TRIUMF-ISAC facility. This holder will be able to accommodate much larger devices, such as the SLAC Transition Edge Sensors, as well as more objects at the same time so that fewer vacuum breaks are necessary. We are currently building a swap in replacement of the chamber that should be available by June.

119. Systematics (placeholder Brian L)