Gamma de-excitation energy spectrum of ⁶⁷Mn, ⁸²Zn, ¹¹⁰Zr and ⁶⁷Fe

This report presents experimental energy spectrum of prompt gamma de-excited from ⁶⁷Mn, ⁸²Zn, ¹¹⁰Zr and of delayed gamma from ⁶⁷Fe. For ⁶⁷Mn, this is the first time its level scheme is estalished. From the calculation, it is shown that level structure of ⁶⁷Mn is consistent with stronglycoupled rotational bands with K = 5/2. For ⁸²Zn, the 692(12) keV 4⁺₁→2+ 1 transition is observed for the first time. While, the 618(15) and 369(17) keV are assigned to 2⁺₁→0⁺₁ and 0+ 2→2⁺₁, respectively. For ¹¹⁰Zr, the first measurement of the low-lying states of the neutron-rich ¹¹⁰Zr is carried out. The 2⁺₁ excitation energy was found at 185(11) keV and two other 4⁺₁ and 0⁺₂ at 565(21) and 485(11) keV, respectively. For ⁶⁷Fe, 3⁶⁷ and 387 keV gammas were detected from its isomers in agreement with previous study. The half-life time of the isomer which decays to the 3⁶⁷ keV level was measured to be equal to 150(10) μs, significantly longer than previously measurements. (author)