Eur. Phys. J. A (2016) 52: 124
https://doi.org/10.1140/epja/i2016-16124-0

Regular Article - Experimental Physics

High-precision mass measurements of ²⁵Al and ³⁰P at JYFLTRAP

University of Jyvaskyla, P.O. Box 35 (YFL), FI-40014 University of Jyvaskyla, Jyvaskyla, Finland

^* e-mail: lacanete@student.jyu.fi

Received: 12 January 2016
Revised: 7 March 2016
Accepted: 12 March 2016
Published online: 11 May 2016

Abstract

The masses of the astrophysically relevant nuclei ²⁵Al and ³⁰P have been measured with a Penning trap for the first time. The mass-excess values for ²⁵Al ( keV) and ³⁰P ( keV) obtained with the JYFLTRAP double Penning trap mass spectrometer are in good agreement with the Atomic Mass Evaluation 2012 values but 5-10 times more precise. A high precision is required for calculating resonant proton-capture rates of astrophysically important reactions ²⁵Al (p,)²⁶Si and ³⁰P(p,)³¹S . In this work, keV and keV were obtained for ²⁵Al and ³⁰P , respectively. The effect of the more precise values on the resonant proton-capture rates has been studied. In addition to nuclear astrophysics, the measured Q_EC value of ²⁵Al , 4276.805(45) keV, is relevant for studies of T = 1/2 mirror beta decays which have a potential to be used to test the Conserved Vector Current hypothesis.