Talk:The NSCL laboratory and the FRIB facility
That's a fine article. Some comments: 1. CCF is used from the beginning but defined only in the middle of the text
We changed the sentence where “CCF” is used for the first time to: "Figure 2 gives an overview of the rare isotope beams produced at the Coupled Cyclotron Facility (CCF) so far (2009)."
2. Figure 2 shows, in addition to what is said in the caption, information on the r and rp processes that are not described ==> describe or remove
We added a sentence to the caption of Figure 2: "In the vicinity of the proton dripline, many nuclei on the rp process path (clue line) have been reached; on the neutron-rich side of the nuclear chart, lighter r-process nuclei (dark brown line) have been accessed at NSCL."
3. There should be a figure showing the facility with the various systems discussed in the text
We added a layout figure (now Figure 3)
4. The production methods are not described (eg in-flight production of secondary nuclei) ==> put a general explanation on the modes of production exotic nuclei
5. Overall it lacks a discussion of the International context (Riken is only quickly mentioned) and international competition
We added a paragraph that briefly explains production mechanisms of rare isotopes (point 4.) and that puts the NSCL in the international context (point 5.):
Rare isotopes at NSCL are predominantly produced via projectile fragmentation. At high projectile energies, a transmission target is used to remove “participant” nucleons from the projectile nuclei while the non-interacting “spectator” part of the projectile proceeds at essentially beam velocity and close to 0° with narrow longitudinal and transversal momentum distributions. The isotopes of interest are then separated in a fragment separator and transported to the experimental end station. A related technique, in-flight projectile fission, is presently being implemented at NSCL as a production mechanism for heavy neutron-rich nuclei. Other facilities employing projectile fragmentation or fission for the production of rare-isotope beams include GSI/FAIR (Germany), RIBF/RIKEN (Japan) and GANIL (France). Another important technique for the production of exotic nuclei is the so-called isotope separation online (ISOL), where radioactive nuclei are produced and thermalized in very thick targets or target-catcher combinations and extracted for subsequent ionization and re-acceleration. This approach is used, for example, at HRIBF/ORNL (US), ISAC/TRIUMF (Canada), ISOLDE/CERN (Switzerland), and SPIRAL/GANIL (France).
6. It also lacks a presentation of major results (such as the number of new isotopes discovered at MSU, ...)
Recent research highlights include the discovery of 17 new isotopes by O.B. Tarasov and T. Baumann et al. – among others 40Mg and 42Al, β-decay half-life measurements of 96Cd, 98Ir and 100Sn, the precision mass measurements of 68,70Se and 71Br and the first spectroscopy of bound and unbound nuclear states in the very neutron-rich nuclei 46S and 24O ,26O, respectively. See the NSCL News archive and NSCL publications for more highlights.