Spins and lifetimes of levels in 55Mn

Energy Levels in55Mn. II. Mean Lifetimes and Spins of Bound States

“…The angular distribution of the ground state transition (the only transition from this state observed in the ( p , y) reaction) givesJ = 3/2 and J = 7 / 2 . The former value is not consistent with the results of earlier measurements [ 21, and the y-decay differs from that obtained b y Hichwa et al [4] and van der Merwe et al [ 51. These two works indicate transitions to the 984 keV and 1292 keV states.…”

“…However, the mean lifetimes from the (CY. p y ) reaction [4] and the (p? y ) reaction (1800 k 2OOfs and > 1000 fs, respectively) are consistent.…”

“…A comprehensive collection of earlier measurements can be found in Nuclear Data Sheets [2]. The most extensive measurements have been performed by Hichwa et al [3,4] using the 52Cr(a,py)55Mn reaction, by van der Merwe et al [5] and Haupt et al [6] using the 55Mn(p,p'y)55Mn reaction and by Correia et al [7] using the "Mn(n, n'y)''Mn reaction.…”

Energy Levels in55Mn I. Excitation Curves, Gamma-Decay of Resonances and of Bound States

“…2281 keV [ X I , 2311 keV, J" = 13/2(-), 2399 keV, J" = (5/2, 712, 912) [ 6 ] , 2582 keV 1161, 2823 keV, J " = 9 / 2 , 2825 keV, J" = (5/2,9/2) [6] and 2829 keV [ 7 ] , and some more levels above 3 MeV (see Table 111). Many of these are high-spin states and such states are rarely populated in (p, y) reactions.…”

Low-lying state investigations of odd-A Mn isotopes around N = 28

“…With a proton number Z = 25, Manganese (Mn) has fruitful structural information and raised lots of concern as the nuclear research goes on. In the past few decades, studies on Mn mainly focused on neutron-rich isotopes, including their lifetime [10], collective characteristics [11], electric and magnetic properties [12][13][14], spectroscopy properties [15,16] as well as the influence from the ν1g 9/2 orbital [13,17,18].…”