Published June 2007 | Version v1
Journal article Metadata-only

Level structure of 26Si and its implications for the astrophysical reaction rate of 25Al(p,γ)26Si

Creators

  • 1. Argonne National Laboratory, Argonne, Illinois 60439 (United States)
  • 2. University of Edinburgh, Edinburgh, EH9 3JZ (United Kingdom)
  • 3. University of York, Heslington, YO10 5DD (United Kingdom)
  • 4. University of Maryland, College Park, Maryland 20742 (United States)
  • 5. University of Notre Dame, Notre Dame, YO10 5DD Indiana 46556 (United States)

Description

A study of the level structure of 26Si using in-beam γ-ray spectroscopy is presented. A full level scheme is derived incorporating all states lying below the proton threshold energy. The results are in good agreement with shell model predictions and one-to-one correspondence is found with states in the mirror nucleus 26Mg. Additionally, a γ-decay branch is observed from a state at 5677.0(17) keV, which is assigned to a 1+ resonance important in the astrophysical reaction 25Al(p,γ)26Si. The newly derived resonance energy, Er=159.2(35) keV, has the effect of decreasing the reaction rate at the novae ignition temperature of ≅0.1 GK by a factor of ≅2 when compared with the previous most precise measurement of this state

Additional details

Identifiers

DOI
10.1103/PhysRevC.75.062801;

Publishing Information

Journal Title
Physical Review. C, Nuclear Physics
Journal Volume
75
Journal Issue
6
Journal Page Range
p. 062801-062801.5
ISSN
0556-2813
CODEN
PRVCAN

INIS

Country of Publication
United States
Country of Input or Organization
International Atomic Energy Agency (IAEA)
INIS RN
39027566
Subject category
S73: NUCLEAR PHYSICS AND RADIATION PHYSICS;
Descriptors DEI
ALUMINIUM 25; GAMMA DECAY; GAMMA SPECTROSCOPY; KEV RANGE; MAGNESIUM 26; MIRROR NUCLEI; NOVAE; PROTONS; REACTION KINETICS; RESONANCE; SHELL MODELS; SILICON 26; THRESHOLD ENERGY
Descriptors DEC
ALKALINE EARTH ISOTOPES; ALUMINIUM ISOTOPES; BARYONS; BETA DECAY RADIOISOTOPES; BETA-PLUS DECAY RADIOISOTOPES; BINARY STARS; DECAY; ELEMENTARY PARTICLES; ENERGY; ENERGY RANGE; ERUPTIVE VARIABLE STARS; EVEN-EVEN NUCLEI; FERMIONS; HADRONS; ISOTOPES; KINETICS; LIGHT NUCLEI; MAGNESIUM ISOTOPES; MATHEMATICAL MODELS; NUCLEAR DECAY; NUCLEAR MODELS; NUCLEI; NUCLEONS; ODD-EVEN NUCLEI; RADIOISOTOPES; SECONDS LIVING RADIOISOTOPES; SILICON ISOTOPES; SPECTROSCOPY; STABLE ISOTOPES; STARS; VARIABLE STARS

Optional Information

Notes
(c) 2007 The American Physical Society