Preparation of isotopic antimony targets

Exotic Nuclear Excitations: The Transverse Wobbling Mode in 135 Pr

“…As mentioned in section 3.1 the choice of beam and target affects both the most probable channel, the excitation energy, and the maximum angular momentum of the compound (and residual) nucleus. In previous in-beam gamma-ray spectroscopy literature the following heavy ion fusion-evaporation reactions have been used to yield the 135 Pr residual nucleus: [46]. Due to the low thermal conductivity (0.243W/cm/K at 300K [57])…”

“…and high vapor pressure [46,92] of Sb, a thin layer (14µg/cm 2 ) of Al was deposited on the front surface of the targets created. This served the dual purpose of helping to dissipate the heat deposited in the target by the beam and of inhibiting sputtering of the target.…”

“…The two self supporting targets used in the Gammasphere experiment were given thick gold backings of 20.3mg/cm 2 for the 630µg/cm 2 target and 22.8mg/cm 2 for the 634µg/cm 2 [46]. This served two purposes: The backing would allow a doppler shift attenuation measurement to determine lifetimes (this unfortunately proved impossible) and the thick gold backing allowed heat deposited in the target by the beam to be easily dissipated, negating the need for a beam wobbling system.…”