Lifetime of the 6793-keV state in 15O.

Journal Article (Journal Article)

The energy derived from the CN cycle at low stellar temperatures is regulated by the 14N(p,gamma)15O reaction. A previous direct measurement of this reaction has been interpreted as showing evidence for a subthreshold resonance which makes a major contribution to the reaction rate at low temperatures. This resonance, at E(c.m.) = -504 keV would correspond to the known Ex = 6793-keV state in 15O. We have measured a mean lifetime of 1.60(+0.75)(-0.72) fs (90% C.L.) for this state using the Doppler-shift attenuation method. This lifetime is a factor of 15 longer than that inferred from the (p,gamma) data and implies that the contribution of the subthreshold resonance is negligible.

Full Text

Duke Authors

Cited Authors

  • Bertone, PF; Champagne, AE; Powell, DC; Iliadis, C; Hale, SE; Hansper, VY

Published Date

  • October 1, 2001

Published In

Volume / Issue

  • 87 / 15

Start / End Page

  • 152501 -

PubMed ID

  • 11580694

Electronic International Standard Serial Number (EISSN)

  • 1079-7114

International Standard Serial Number (ISSN)

  • 0031-9007

Digital Object Identifier (DOI)

  • 10.1103/physrevlett.87.152501


  • eng