Liquid hydrogen and helium targets for radioisotope beams at RIKEN

One- and two-neutron removal reactions from19,20C with a proton target

“…The reaction target was made of liquid hydrogen (t=204 mg/cm 2 ), a part of the cryogenic proton and alpha target system (CRYPTA) [23], and was placed at the achromatic focus (F3). Before the reaction target, three PPACs were used to track incident nuclei and to obtain the beam position and the incident angle on the target.…”

γ-ray spectroscopy ofC19via the single-neutron knock-out reaction

“…The radioactive ion beam was transported to a secondary target of liquid hydrogen of 190 mg/cm 2 cooled down to 22 K [23]. The mean energy of the 20 C particles in the middle of the target was around 50 MeV/nucleon.…”

Two-neutron sequential decay ofO24

“…The secondary beam then proceeded to the experimental area where it impinged upon the Ursinus College Liquid Hydrogen Target, filled with liquid deuterium (LD 2 ), at a rate of approximately 30 particles per second. The LD 2 target is cylindrical with a diameter of 38 mm and a length of 30 mm, is sealed with Kapton foils 125 µm thick on each end, and is based on the design of Ryuto et al [25]. For the duration of the experiment, the target was held slightly above the triple point of deuterium at 19.9 ± 0.25 K and 850 ± 10 Torr, and wrapped with 5µm of aluminized My-lar to ensure temperature stability.…”