Anomalously hindered E2 strength B(E2;2+(1)-->0+) in 16C

N Imai; H J Ong; N Aoi; H Sakurai; K Demichi; H Kawasaki; H Baba; Zs Dombrádi; Z Elekes; N Fukuda; Zs Fülöp; A Gelberg; T Gomi; H Hasegawa; K Ishikawa; H Iwasaki; E Kaneko; S Kanno; T Kishida; Y Kondo; T Kubo; K Kurita; S Michimasa; T Minemura; M Miura; T Motobayashi; T Nakamura; M Notani; T K Onishi; A Saito; S Shimoura; T Sugimoto; M K Suzuki; E Takeshita; S Takeuchi; M Tamaki; K Yamada; K Yoneda; H Watanabe; M Ishihara

doi:10.1103/PhysRevLett.92.062501

Anomalously hindered E2 strength B(E2;2+(1)-->0+) in 16C

Phys Rev Lett. 2004 Feb 13;92(6):062501. doi: 10.1103/PhysRevLett.92.062501. Epub 2004 Feb 12.

Authors

Affiliation

¹ RIKEN, Hirosawa 2-1, Wako, Saitama 351-0198, Japan. imai@rarfaxp.riken.go.jp

PMID: 14995232
DOI: 10.1103/PhysRevLett.92.062501

Abstract

The electric quadrupole transition from the first 2(+) state to the ground 0(+) state in 16C is studied through measurement of the lifetime by a recoil shadow method applied to inelastically scattered radioactive 16C nuclei. The measured mean lifetime is 77+/-14(stat)+/-19(syst) ps. The central value of mean lifetime corresponds to a B(E2;2+(1)-->0(+)) value of 0.63e(2) fm(4), or 0.26 Weisskopf units. The transition strength is found to be anomalously small compared to the empirically predicted value.