Lifetime measurement of the 6792 keV state in 15O, important for the astrophysical S factor extrapolation in 14N(p,g)15O

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dc.creatorSchuermann, D.
dc.creatorKunz, R.
dc.creatorLingner, I.
dc.creatorRolfs, C.
dc.creatorSchuemann, F.
dc.creatorStrieder, F.
dc.creatorTrautvetter, H. -P.
dc.date2008-04-11
dc.date.accessioned2026-07-07T11:33:35Z
dc.date.available2026-07-07T11:33:35Z
dc.descriptionWe report on a new lifetime measurement of the E_x=6792 keV state in 15O via the Doppler-shift attenuation method at the E=259 keV resonance in the reaction 14N(p,g)15O. This subthreshold state is of particular importance for the determination of the ground state astrophysical S factor of 14N(p,g)15O at stellar energies. The measurement technique has been significantly improved compared with previous work. The conclusion of a finite lifetime drawn there cannot be confirmed with the present data. In addition, the lifetime of the two states at E_x=5181 and 6172 keV have been measured with the same technique in order to verify the experimental method. We observe an attenuation factor F(tau)>0.98 for the E_x =6172 and 6792 keV states, respectively, corresponding to tau<0.77 fs. The attenuation factor for the E_x=5181 keV state results in F(tau)=0.78+/-0.02 corresponding to tau=8.4+/-1.0 fs in excellent agreement with literature.
dc.description7 pages, 9 figures, accepted for publication in PRC
dc.identifierhttps://arxiv.org/abs/0804.1934
dc.identifierhttp://arxiv.org/abs/0804.1934
dc.identifierPhys.Rev.C77:055803,2008
dc.identifierdoi:10.1103/PhysRevC.77.055803
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/197946
dc.subjectNuclear Experiment
dc.titleLifetime measurement of the 6792 keV state in 15O, important for the astrophysical S factor extrapolation in 14N(p,g)15O
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