Energy Levels in ^{240, 242, 244}Am Studied by Deuteron-induced Neutron Transfer

Abstract

Targets of 241Am and 243Am were bombarded with 12 MeV deuterons in order to study energy levels in 240,242,244Am. The scattered particles were analysed in a broad range magnetic spectrograph. The measured ground state Q-values are -(0.388±0.015) MeV for the 241Am(d,t)240Am-reaction, -(0.111±0.015) MeV for the 243Am(d,t)242Am reaction and (3.308±0.015) MeV for the 241Am(d,p)242Am reaction. The neutron orbitals 631↓ and 501↑ are observed in 240,242Am. The 620↑ orbital is observed in 242,244Am, and the 622↑ orbital is observed in 240,242,244Am. The neutron orbitals are assumed to be coupled to the 523↓ proton orbital.

Coulomb excitation of the 242m Am isomer

“…The proton-neutron configurations built on the proton 5/2 − [523] Nilsson orbital [22,24] leading to the rotational bands in 242 Am are displayed in Figure 7, including the states identified in the present work. The…”

“…242 Am reaction [24]. These are now believed to be the 6 − and 7 − states of the K = 6 band (Figure 3).…”