Phys. Rev. Lett. 104, 062701 (2010) [4 pages]Observation of a Large Reaction Cross Section in the Drip-Line Nucleus 22C
See accompanying Physics Viewpoint Reaction cross sections (σR) for 19C, 20C and the drip-line nucleus 22C on a liquid hydrogen target have been measured at around 40A MeV by a transmission method. A large enhancement of σR for 22C compared to those for neighboring C isotopes was observed. Using a finite-range Glauber calculation under an optical-limit approximation the rms matter radius of 22C was deduced to be 5.4±0.9 fm. It does not follow the systematic behavior of radii in carbon isotopes with N≤14, suggesting a neutron halo. It was found by an analysis based on a few-body Glauber calculation that the two-valence neutrons in 22C preferentially occupy the 1s1/2 orbital. © 2010 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.104.062701
DOI:
10.1103/PhysRevLett.104.062701
PACS:
25.60.Dz, 21.10.Gv, 25.70.Mn, 27.30.+t
|
|
About | Terms and Conditions | Subscriptions | Search | Help
Use of the American Physical Society websites and journals implies that the user has read and agrees to our Terms and Conditions and any applicable Subscription Agreement. Physical Review®, Physical Review Letters®, Reviews of Modern Physics®, and Physical Review Special Topics® are trademarks of the American Physical Society.