Measurement of 25Mg(p,gamma)26Alg resonance strengths via AMS

A. ARAZI; T. FAESTERMANN; J.O. FERNÁNDEZ NIELLO; K. KNIE; G. KORSCHINEK; M. POUTIVTSEV; E. RICHTER; G. RUGEL; A. WALLNER

Physical Review C

American Physical Society

Año: 2006 vol. 74 p. 258021 - 258026

0556-2813

The strengths of resonances located at center-of-mass energies of Ec.m. = 189, 304, 374, and 418 keV for the 25Mg(p,gamma) reaction have been measured for the first time with an offline method: Mg targets were firstly activated with protons at the resonance energies and the produced 26Alg nuclei were counted by means of highly sensitive accelerator mass spectrometry (AMS). Thus, the production of 26Al in its ground state is determined independently from the gamma-decay branching ratio. While the 304, 374, and 418 keV resonances show fair agreement with previous measurements, the 189 keV resonance  yield a significantly less strength. In addition, an experimental upper limit for the Ec.m. = 92 keV resonance was determined.