Static quadrupole moment of the first excited state of 24Mg

Abstract

The static quadrupole moment Q 2+ and the B(E2; 0 + → 2 +) value for the first excited state of 24Mg have been determined using the reorientation effect in Coulomb excitation. Surface barrier detectors at 90° and 172° were used to detect 24Mg ions scattered from 208Pb. It is found that Q 2+ = −17.8 ± 1.3 e · fm 2, suggesting that, contrary to most previous experimental evidence, the quadrupole moment is in agreement with theoretical predictions. For B(E2; 0 + → 2 +) we obtain the value 445 ± 24 e 2 · fm 4.