Phys. Rev. Lett. 86, 1982–1985 (2001)Measurement of the B(E2) of Λ7Li and Shrinkage of the Hypernuclear Size
See accompanying Physics Focus We report on the first measurement of a hypernuclear γ-transition probability. γ rays emitted in the E2(5/2+→1/2+) transition of Λ7Li were detected by a large-acceptance germanium detector array (Hyperball), and the lifetime of the parent state ( 5/2+) was determined by the Doppler shift attenuation method. The obtained result, 5.8-0.7+0.9±0.7ps, was then converted into the reduced transition probability [ B(E2)] to be B(E2;5/2+→1/2+) = 3.6±0.5-0.4+0.5e2fm4. Compared with the B(E2) of the corresponding E2(3+→1+) transition in the 6Li nucleus, our result gives evidence that the size of the 6Li core in Λ7Li is smaller than the 6Li nucleus in the free space. © 2001 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.86.1982
DOI:
10.1103/PhysRevLett.86.1982
PACS:
21.80.+a, 21.10.Tg, 23.20.-g, 27.20.+n
|
|
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.