Nuclear properties of 246Am and 247Am

Kπ=8−isomers andKπ=2Robinson1, Khoo2, Ahmad3 et al. 2008Phys. Rev. CSelf Cite509371View full textAdd to dashboardCite

“…The americium was chemically isolated, using the procedures described in Ref. [11], and sources were prepared after mass separation in an electromagnetic isotope separator [12]. Conversion electron spectra and γ -γ coincidences were measured.…”

Decay spectroscopy of two-quasiparticle K isomers in Cm246,248 via inelastic and transfer reactions

“…The different beam-off time intervals were inspected in order to converge on the half-life of the known 246 Cm during the 8 s beam-off periods; (bottom) partial level scheme depicting the decay pattern of the isomer (from Refs. [10,13]). isomer in 246 Cm [13].…”

“…[10,13]). isomer in 246 Cm [13]. The existence of this isomer was confirmed by the observation of out-of-beam coincidence events, specifically in the beam ON/OFF ranges of 1 s/3 s and 2 s/8 s, between the 679-keV γ ray, which directly deexcites the isomeric state, and two ground-state-band (GSB) transitions in 246 Cm, viz.…”

“…Three decay branches had been previously established for this long-lived state [10,13]. One is a direct decay to the 8 + state in the GSB via a 679-keV transition.…”

“…Experiments at Argonne, GSI, and Jyväskÿla have identified K π = 8 − isomers in the N = 150 isotones 250 Fm [5] and 252 No [6,10]. In 246 Cm (Z = 96, N = 150), a K π = 8 − isomer had previously been identified in the β − decay of 246 Am [10,13]. While the decay scheme for the isomer had been deduced, the half-life had not been established.…”