Nuclear Structure and Decay Data for A=25 Isobar

Evaluated spectroscopic data and level schemes are presented for ²⁵N (unobserved), ²⁵O, ²⁵F, ²⁵Ne, ²⁵Na, ²⁵Mg, ²⁵Al, ²⁵Si, and ²⁵P based on the measured decay and nuclear reaction studies. This evaluation for A=25 supersedes the earlier one by R.B. Firestone (2009Fi05). Overall the decay datasets associated with ²⁵Ne, ²⁵Na, and ²⁵Mg remain the same compared with those in the previous evaluation, 2009Fi05, however, new β-n decay datasets are added in ²⁵Ne along with new reaction datasets almost for all of the above mentioned nuclides from older and new references.

Other highlights of this evaluation are the following:

Ground state of ²⁵O is neutron unbound. Several new articles reported resonance energies of this nuclide, studied using radioactive beams, like ²⁴O,²⁷Ne, ²⁶F, etc. These results have been included in this evaluation.

Due to the lack of direct experimental evidence, a tentative (5/2⁺) assignment for the ground state and no spin-parity assignments for the known excited states of ²⁵Si has been adopted in the present evaluation.

In the absence of experimental evidence, tentative (1/2⁺) assignment has been adopted for the ground state of ²⁵P. As suggested in 2015Fe02, light-ion scattering experiment in the inverse kinematics seems to be a probable probe for investigating the low-lying states of ²⁵P, which are the mirror analogs of the states of ²⁵Ne.