English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

We present shell model calculations for the beta-decay of the 14C groundstate to the 14N ground state, treating the states of the A=14 multiplet as two0p holes in an 16O core. We employ low-momentum nucleon-nucleon (NN)interactions derived from the realistic Bonn-B potential and find that theGamow-Teller matrix element is too large to describe the known lifetime. Byusing a modified version of this potential that incorporates the effects ofBrown-Rho scaling medium modifications, we find that the GT matrix elementvanishes for a nuclear density around 85% that of nuclear matter. We find thatthe splitting between the (J,T)=(1+,0) and (J,T)=(0+,1) states in 14N isimproved using the medium-modified Bonn-B potential and that the transitionstrengths from excited states of 14C to the 14N ground state are compatiblewith recent experiments.

Shell model description of the 14C dating beta decay with Brown-Rho-scaled NN interactions