Pulsed beam lifetime measurements in ⁶⁴Cu, ⁵⁹Ni, ⁶⁵Zn, ^45,47,49Ti and ^47,49,50,51V

Abstract

The lifetimes of several excited states in ⁶⁴Cu, ⁵⁹Ni, ⁶⁵Zn, ^45,47,49Ti and ^47,49,50,51V have been determined using a direct timing technique. Data for ⁶⁴Cu were obtained in order to provide reference γ-rays for use in the measurements on the Ti and V isotopes. Several states in ⁶⁴Cu were found to provide conveniently fast low-energy γ-ray decays :E(ρ_m) are; 159 (29.8 ± 5.4), 278 (< 13),344(< 5), 362 (< 6), 574 (< 24), 609 (< 13), 633 (< 12), 739 (< 16), 746 (< 18), 878 (< 22), 895 (<29), 927 (< 15), where energies are in keV and lifetimes are in ps. For the Ti, V, Ni and Zn isotopes the results were:⁴⁵Ti 330 (1585 ± 20); ⁴⁷Ti 160 (301 ± 8), 1795 (< 23), 1825 (< 10); ⁴⁹Ti 1381 (< 5), 1585 (< 11), 1762 (< 14); ⁴⁷V 88 (951±52), 146 (786 ± 95), 260 (78 ± 11); ⁴⁹V 90 (329 ± 19), 153 (28.71 ± 0.35 ns); ⁵⁰V 226(< 16), 320 (< 450), ⁵¹V 320 (266 ± 9), 928 (< 14); ⁵⁹Ni 340 (93 +- 10), 465(35 ± 18); ⁶⁵Zn 115 (641 ± 13), 207 (216 ± 10), 769 (< 26),867(< 37),909(< 31), 1047 (< 21), 1066 (829 ± 37), 1252 (< 19), 1263 (< 23), 1343 (< 18), 1369 (< 20). Negative parity states of the odd-mass Ti and V isotopes investigated, have been compared with calculations based on the strong coupling symmetric rotator model including Coriolis coupling between rotational bands.