Skip navigation
Skip navigation

One- and two-neutron removal reactions from the most neutron-rich carbon isotopes

Kobayashi, N.; Nakamura, T.; Tostevin, Jeffrey Allan; Kondo, Y.; Aoi, N.; Baba, H.; Deguchi, S.; Gibelin, J.; Ishihara, M.; Kawada, Y.; Simpson, Edward

Description

The structure of 19 ,20 ,22C has been investigated using high-energy (around 240 MeV/nucleon) one- and two-neutron removal reactions on a carbon target. Measurements were made of the inclusive cross sections and momentum distributions for the charged residues. Narrow momentum distributions were observed for one-neutron removal from 19C and 20C and two-neutron removal from 22C. Two-neutron removal from 20C resulted in a relatively broad momentum distribution. The results are compared with...[Show more]

dc.contributor.authorKobayashi, N.
dc.contributor.authorNakamura, T.
dc.contributor.authorTostevin, Jeffrey Allan
dc.contributor.authorKondo, Y.
dc.contributor.authorAoi, N.
dc.contributor.authorBaba, H.
dc.contributor.authorDeguchi, S.
dc.contributor.authorGibelin, J.
dc.contributor.authorIshihara, M.
dc.contributor.authorKawada, Y.
dc.contributor.authorSimpson, Edward
dc.date.accessioned2015-12-10T22:56:22Z
dc.identifier.issn0556-2813
dc.identifier.urihttp://hdl.handle.net/1885/60210
dc.description.abstractThe structure of 19 ,20 ,22C has been investigated using high-energy (around 240 MeV/nucleon) one- and two-neutron removal reactions on a carbon target. Measurements were made of the inclusive cross sections and momentum distributions for the charged residues. Narrow momentum distributions were observed for one-neutron removal from 19C and 20C and two-neutron removal from 22C. Two-neutron removal from 20C resulted in a relatively broad momentum distribution. The results are compared with eikonal-model calculations combined with shell-model structure information. The neutron removal cross sections and associated momentum distributions are calculated for transitions to both the particle-bound and particle-unbound final states. The calculations take into account the population of the mass A-1 reaction residues A -1C and, following one-neutron emission after one-neutron removal, the mass A-2 two-neutron removal residues A -2C. The smaller contributions of direct two-neutron removal, that populate the A -2C residues in a single step, are also computed. The data and calculations are shown to be in good overall agreement and consistent with the predicted shell-model ground-state configurations and one-neutron overlaps with low-lying states in 18 -21C. These suggest significant νs1/22 valence neutron configurations in both 20C and 22C. The results for 22C strongly support the picture of 22C as a two-neutron halo nucleus with a dominant νs1/22 ground-state configuration.
dc.publisherAmerican Physical Society
dc.rightsAuthor/s retain copyright
dc.sourcePhysical Review C: Nuclear Physics
dc.titleOne- and two-neutron removal reactions from the most neutron-rich carbon isotopes
dc.typeJournal article
local.description.notesImported from ARIES
local.identifier.citationvolume86
dc.date.issued2012
local.identifier.absfor020202 - Nuclear Physics
local.identifier.ariespublicationu4155331xPUB528
local.type.statusPublished Version
local.contributor.affiliationKobayashi, N., Tokyo Institute of Technology
local.contributor.affiliationNakamura, T., Tokyo Institute of Technology
local.contributor.affiliationTostevin, Jeffrey Allan, University of Surrey
local.contributor.affiliationKondo, Y., Tokyo Institute of Technology
local.contributor.affiliationAoi, N., RIKEN Nishina Center
local.contributor.affiliationBaba, H., RIKEN Nishina Center
local.contributor.affiliationDeguchi, S., Tokyo Institute of Technology
local.contributor.affiliationGibelin, J., ENSICAEN, IN2P3-CNRS
local.contributor.affiliationIshihara, M., RIKEN
local.contributor.affiliationKawada, Y., Tokyo Institute of Technology
local.contributor.affiliationSimpson, Edward, College of Physical and Mathematical Sciences, ANU
local.bibliographicCitation.issue054604
local.bibliographicCitation.startpage1
local.bibliographicCitation.lastpage11
local.identifier.doi10.1103/PhysRevC.86.054604
dc.date.updated2015-12-10T07:53:27Z
local.identifier.scopusID2-s2.0-84870158246
dcterms.accessRightsOpen Access
CollectionsANU Research Publications

Download

File Description SizeFormat Image
01_Kobayashi_One-_and_two-neutron_removal_2012.pdf657.73 kBAdobe PDF


Items in Open Research are protected by copyright, with all rights reserved, unless otherwise indicated.

Updated:  19 May 2020/ Responsible Officer:  University Librarian/ Page Contact:  Library Systems & Web Coordinator