TRIUMF-ISOL

Ra84] H. Ravn in "Zinal 1984, Workshop on the Isolde Programme beyond 1985". Also as an Appendix in Proceedings of TRIUMF-ISOL Workshop, Mont Gabriel, June 1984, TRI-84-1. 

Note The author of this chapter worked with members of the TRIUMF-ISOL Collaboration, 4004 Wesbrook Mall, Vancouver, British Columbia V6T 2A3, Canada. 

In summary, a proposal for a TRIUMF-ISOL facility including a preliminary version of a post-accelerator to boost the radioactive beam energies up... 

Fig. 2. Schematic layout of the vertical TRIUMF-ISOL facility including high intensity and high resolution radioactive ion beam lines.

Fig. 3. Artist s conception of proposed TRIUMF-ISOL Facility including new building, north of TRIUMF hall.

RAV84] Ravn, H., 1984. In Proceedings of the TRIUMF-ISOL Workshop, eds. 

PR085] The TRIUMF-ISOL FACILITY, A Proposal for an Intense Radioactive Beams Facility, June 1985. 

BOY83] Boyd, R. et al., 1981. IEEE Trans. Nucl. Sci. NS30, No. 2, 1387. [BUC84] Buchmann, L., 1984. In Proceedings of the TRIUMF-ISOL Workshop, eds. 

The techniques of u.SR and p-LCR are based on the fact that parity is violated in weak interactions. Consequently, when a positive muon is created from stationary pion decay its spin is directed opposite to its momentum. This makes it possible to form a beam of low energy (4 MeV) positive muons with nearly 100% spin polarization at high intensity particle accelerators such as TRIUMF in Canada, the PSI in Switzerland, LAMPF and BNL in the USA, KEK in Japan, and RAL in England. Furthermore the direction of position emission from muon decay is positively correlated with the muon spin polarization direction at the time of decay. This allows the time evolution of the muon spin polarization vector in a sample to be monitored with a sensitivity unparalleled in conventional magnetic resonance. For example, only about 101 7 muon decay events are necessary to obtain a reasonable signal. Another important point is that //.SR is conventionally done such that only one muon is in the sample at a time, and for p,LCR, even with the highest available incident muon rates, the 2.2 fis mean lifetime of the muon implies that only a few muons are present at a given time. Consequently, muonium centers are inherently isolated from one another. 

ISOLDE at CERN (SC), make it feasible to consider using such secondary ions as projectiles for nuclear reactions. A pressing need for reaction rate data involving radioactive species exists in nuclear astrophysics. This requires having available projectiles (A < 60) in the energy range from about 200 keV/amu to 1.5 MeV/amu. It has been proposed to install an ISOL device at the TRIUMF facility to utilize the available intermediate energy (200-500 MeV), intense (<100 yA) proton beam as the primary production source. The mass analyzed, radioactive beam (RB),... 

Fig. 1. Location of the ISOL target in front of the beam dump on TRIUMF beam line 4A.

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