Electromagnetic and angular momentum properties of states in²⁵Mg below 6.05 MeV in excitation

The structure of27Mg from the26Mg(d, p?) reaction

“…It can now be extended to the J==5/2 and 11/2-levels, respectively. These levels have recently been observed [28,29] in 2SMg. Their obvious counterparts in 27Mg (Tables 1, 2) are the J'~=5/2-level at E x =5372keV and the J~=5/2--11/2-level at E x = 5829 keV.…”

The structure of25Mg

“…Outband E 1 decays are weak and the transition rates range between t0 -4 and 10-3W.u. The rate of the alleged 15/2-~ 11/2-inband E2 transition as calculated from the lifetime (Table 1) [13]. Hence we expect v-decay of observable intensity between the higher-excited and the established members of the band, even if the decays are unfavoured by a low transition energy.…”

“…In the realm below 6.1 MeV excitation energy we can resolve the still existing U=7/2 +, 11/2 + ambiguity [12,13] in the spin-parity assignment to the 6041 keV state. Feeding of this level from the U= 13/2 + states at 8811 and 9410 keV excitation energies eliminates the U= 7/2 + assignment.…”

“…The low-lying states with I < 9/2 reflect the spectrum of a prolate deformed system [14]. At higher spin the experimental situation is still rather confusing [9,12,13]. At higher spin the experimental situation is still rather confusing [9,12,13].…”

“…The combina-tion of these reactions made possible the observation of levels with spins 1/2 < I_< 15/2. Previous studies with the same reaction [12,13] were confined to the accumulation of y-ray singles spectra using Compton-suppressed and pair spectrometers. The investigations with the 24Mg(d, py) reaction are the continuation of previous work [- [10][11][12] with higher statistical accuracy.…”