Revel, A, Marques, FM, Sorlin, O, Aumann, T, Caesar, C, Holl, M, Panin, V, Vandebrouck, M, Wamers, F, Alvarez-Pol, H et al (show 90 more authors)
(2018)
Strong Neutron Pairing in core+4<i>n</i> Nuclei.
PHYSICAL REVIEW LETTERS, 120 (15).
152504-.
Text
strong neutron pairing.pdf - Author Accepted Manuscript Download (489kB) | Preview |
Abstract
The emission of neutron pairs from the neutron-rich N=12 isotones ^{18}C and ^{20}O has been studied by high-energy nucleon knockout from ^{19}N and ^{21}O secondary beams, populating unbound states of the two isotones up to 15 MeV above their two-neutron emission thresholds. The analysis of triple fragment-n-n correlations shows that the decay ^{19}N(-1p)^{18}C^{*}→^{16}C+n+n is clearly dominated by direct pair emission. The two-neutron correlation strength, the largest ever observed, suggests the predominance of a ^{14}C core surrounded by four valence neutrons arranged in strongly correlated pairs. On the other hand, a significant competition of a sequential branch is found in the decay ^{21}O(-1n)^{20}O^{*}→^{18}O+n+n, attributed to its formation through the knockout of a deeply bound neutron that breaks the ^{16}O core and reduces the number of pairs.
Item Type: | Article |
---|---|
Additional Information: | 6 pages, 4 figures, accepted for publication in Phys. Rev. Lett |
Uncontrolled Keywords: | nucl-ex, nucl-ex |
Depositing User: | Symplectic Admin |
Date Deposited: | 23 Jan 2020 11:39 |
Last Modified: | 18 Oct 2023 17:01 |
DOI: | 10.1103/PhysRevLett.120.152504 |
Related URLs: | |
URI: | https://livrepository.liverpool.ac.uk/id/eprint/3071714 |