Abstract
The
28Si(
58Ni, 2n)
84Mo reaction has been studied at 195 MeV bombarding energy. The prompt gamma rays were detected in an array of twenty, escape-suppressed Ge detectors in coincidence with the recoiling nuclei, which were identified by
A and
Z with a recoil separator. A 443.8±0.3 keV gamma ray was observed from
84Mo which is interpreted as the 2
+−0
+ transition in this nucleus. This would indicate a quadrupole deformation
ε
2∼0.30. This result confirms that
76Sr lie at the centre of the region of deformed nuclei with
A∼80.