Proposals

A prime justification for the accelerated beams facility (ISAC) at TRIUMF is the study of radiative capture reactions using radioactive beams. Some key reactions for heavy-element synthesis during explosive burning in stars involve radioactive reactants of short half-lives. Table 1 lists some of these astrophysically-interesting reactions of the initial ISAC program. The limited intensity of radioactive beams and the small cross sections for capture reactions require a detection system which has both high efficiency for detection of reaction products and highly effective suppression of beam background. The DRAGON system has been designed for radioactive beam capture studies at ISAC; with support from NSERC, TRIUMF and agencies outside Canada, construction is under way on a windowless gas target, electromagnetic mass separator (EMS) and recoil ion detector for DRAGON. This request is for an economical addition to DRAGON, a compact array of gamma-ray detectors, which will enhance its ability to suppress background and should provide additional information of significance both in performing the experiment and in interpreting the results.

dra_99.pdf

Author: n/a

Journal: Submitted to NSERC

The proposed DRAGON (Detector of Recoils And Gammas Of Nuclear reactions) facility at TRIUMF is uniquely designed to perform important nuclear astrophysics experiments with radioactive nuclear beams and the goal is to be operational when the new ISAC accelerated radioactive beams facility is operational in 2000. The projects required to meet this goal include the following:

a. Projects related to the development and commissioning of the facility, which are not covered by the TRIUMF infrastructure;
b. Projects related to developing and finalizing the concepts for the Phase II of the DRAGON facility, the Gamma Array;
c. Projects related to some specific experiments planned for the DRAGON.

A secondary goal is to develop a team of scientists dedicated to this new facility and knowledgeable of its operational idiosyncrasies.
This grant will fund the continuing work of the recoil group in commissioning the DRAGON and in the development of the required detectors, electronics, targets and beams.

proposals-10-1997-dra_prop.pdf

Author: See Paper Document

Journal: Submitted to NSERC, Oct. 1997

A prime justification for the accelerated beams facility (ISAC) at TRIUMF is the study of radiative capture reactions using radioactive  beams. Some key reactions for heavy-element synthesis during explosive burning in stars involve radioactive reactants of short half-lives. Table 1 lists some of these astrophysically-interesting reactions of the initial ISAC program. The limited intensity of radioactive beams  and the small cross sections for capture reactions require a detection system which has both high efficiency for detection of reaction products and highly effective suppression of beam background. The DRAGON system has been designed for radioactive beam capture studies at ISAC; with support from NSERC, TRIUMF and agencies outside Canada, construction is under way on a windowless gas target, electromagnetic mass separator (EMS) and recoil ion detector for DRAGON. This request is for an economical addition to DRAGON, a compact array of gamma-ray detectors, which will enhance its ability to suppress background and should provide additional information of significance both in performing the experiment and in interpreting the results.

proposals-09-1999dra_99.pdf

Author: See Paper Document

Journal: Submitted to NSERC, Sept. 1999

In his Nobel Prize acceptance speech in 1984, Prof. Willie Fowler of the California Institute of Technology, and the father of nuclear astrophysics said, "Direct measurements on short-lived radioactive nuclei and the excited states of all nuclei are impossible at the present
time. In this connection the production of radioactive ion beams holds great promise for the future"[Fow84]. It has taken a number of years to reach this point but this future promise is now here. The new ISAC facility combined with the DRAGON and TUDA experimental facilities will help realize this future.

proposals-10-2000-dra_all.pdf

Author: See Paper Document

Journal: