26 Al beam production by a solid state laser ion source at TRIUMF

Abstract

Many experiments carried out at radioactive beam facilities require the production of intense, isotopically clean and isobar free beams of a particular isotope. At TRIUMF the addition of a resonant ionization laser ion source (TRILIS) enables a multitude of new beams and therefore new experiments to be carried out. 26 Al was one of the first radioactive ion beams delivered to an experiment using TRILIS. This paper outlines the development of the 26 Al ion beam for nuclear astrophysics.Keywords Resonant laser ionization · Radioactive ion beam · Laser ion source · 26 Al PACS 07.05.Fb · 27.30.+t · 28.60.+s · 29.25.Ni · 29.25.Rm · 32.80.Fb · 32.80.Rm · 42.62.Fi · 42.65.Ky

Segmented linear radiofrequency quadrupole/laser ion source project at TRIUMF

“…A total ionization efficiency of 0.6% was calculated for the surface ionization only as opposed to 13% when lasers were used. Elements such as Ga, Be and Ag have been ionized using TRILIS [19,20]. The TRILIS group is now working on the development of new excitation schemes for requested ISAC beams.…”

Ultra Trace Determination Scheme for26Al by High-Resolution Resonance Ionization Mass Spectrometry using a Pulsed Ti:Sapphire Laser

“…For example, the long-lived radioisotope 26 Al (half-life of 7 Â 10 5 years) has been used in geophysics, 1) biochemistry, 2) nuclear astrophysics 3) and nuclear engineering. 4) In nature, 26 Al is produced by cosmic ray induced spallation reactions on 40 Ar in the earth's atmosphere and from 28 Si in minerals.…”

“…These Ti:Sa lasers are widely used as a laser source for RIMS at Mainz University and elsewhere. 3,16,17) Figure 1 shows possible optical two-and three-step excitation and ionization schemes for Al optimized for Ti:Sa laser use. Concerning the chosen first excitation step at 308 nm, T. G. Cooper 18) between the centers of gravity.…”

Laser systems for on-line laser ion sources

“…This experiment [21,22] marked the first application of an on-line Ti:Sa LIS. Until today, the Ti:Sa based TRILIS at TRIUMF has successfully delivered online beams of aluminium, gallium, beryllium and silver [20,23]. In the latter case it was possible to demonstrate not only elemental or isotopic selectivity, but also the separation of nuclear spin isomers.…”