Lifetime Measurement of the $2_1^{+}$ State in ${}^{20}\mathbf{C}$

Journal Article · Mon Aug 01 04:00:00 EDT 2011 · Physical Review Letters

DOI:https://doi.org/10.1103/PhysRevLett.107.102501· OSTI ID:1050835

Petri, M.; Fallon, P.; Macchiavelli, A. O.; Paschalis, S.; Starosta, K.; Baugher, T.; Bazin, D.; Cartegni, L.; Clark, R. M.; Crawford, H. L.; Cromaz, M.; Dewald, A.; Gade, A.; Grinyer, G. F.; Gros, S.; Hackstein, M.; Jeppesen, H. B.; Lee, I. Y.; McDaniel, S.; Miller, D. ; Rajabali, M. M.; Ratkiewicz, A.; Rother, W.; Voss, P.; Walsh, K. A.; Weisshaar, D.; Wiedeking, M.; Brown, B. A.

Establishing how and when large N/Z values require modified or new theoretical tools is a major quest in nuclear physics. Here we report the first measurement of the lifetime of the 2{sup +}{sub 1} state in the near-dripline nucleus {sup 20}C. The deduced value of {tau}{sub 2{sup +}{sub 1}} = 9.8 ± 2.8(stat){sup +0.5}{sub -1.1}(syst) ps gives a reduced transition probability of B(E2;2{sup +}{sub 1}{yields}0{sup +}{sub g.s.}) = 7.5{sup +3.0}{sub -1.7}(stat){sup +1.0}{sub -0.4}(syst) e{sup 2}fm{sup 4} in good agreement with a shell model calculation using isospin-dependent effective charges.

• Research Organization: Ernest Orlando Lawrence Berkeley National Laboratory, Berkeley, CA (US)
• Sponsoring Organization: Nuclear Science Division
• DOE Contract Number: AC02-05CH11231
• OSTI ID: 1050835
• Report Number(s): LBNL-5032E
• Journal Information: Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 10 Vol. 107; ISSN 0031-9007; ISSN PRLTAO
• Publisher: American Physical Society (APS)
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
structure of carbon isotopes
isotopes
carbon
nuclear structure
nuclear properties
neutrons
protons
lifetime measurement