6533b82afe1ef96bd128cbb3
RESEARCH PRODUCT
R-matrix analysis of theβdecays ofN12andB12
B. R. FultonThomas NilssonTommi EronenM. AlcortaMiguel MadurgaHenrik B. JeppesenK. RiisagerOliver S. KirsebomAntti SaastamoinenE. TraykovSijtze BrandenburgPeter DendoovenY. WangA. RogachevskiyOlof TengbladKari PerajarviJuha ÄYstöBjörn JonsonL. M. FraileH. O. U. FynboR. BoutamiRiccardo RaabeJussi HuikariAri JokinenB. BastinIain MooreJ. BüscherGerco OnderwaterHeikki PenttiläAnu KankainenA. NieminenS. HyldegaardM. J. G. BorgeC. Aa. DigetP. Van DuppenSami Rinta-antilaMarc HuyseGöran Hugo NymanKlaus-peter JungmannH. W. WilschutS. P. FoxM. SohaniK. Wilhelmsensubject
Nuclear physicsPhysicsNuclear and High Energy PhysicsExcited stateDouble beta decayCarbon-12Isotopes of boronAlpha particleAtomic physicsRadioactive decaySpectral lineR-matrixdescription
The β decays of 12N and 12B have been studied at KVI and JYFL to resolve the composition of the broad and interfering 0+ and 2+ strengths in the triple-α continuum. For the first time a complete treatment of 3α decay is presented including all major breakup channels. A multilevel, many-channel R-matrix formalism has been developed for the complete description of the breakup in combination with the recently published separate analysis of angular correlations. We find that, in addition to the Hoyle state at 7.65 MeV, more than one 0+ and 2+ state is needed to reproduce the spectra. Broad 03+ and 22+ states are found between 10.5 and 12 MeV in this work. The presence of β strength up to the 12N Q-value window suggests the presence of additional 0+ and 2+ components in the 12C structure at energies above 12.7 MeV.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2010-02-04 | Physical Review C |