Production cross section measurements of radioactive isotopes by BigRIPS separator at RIKEN RI Beam Factory

• Published in: Nuclear instruments & methods in physics research. Section B, Beam interactions with materials and atoms Vol. 317; pp. 756 - 768
• Main Authors: Suzuki, H., Kubo, T., Fukuda, N., Inabe, N., Kameda, D., Takeda, H., Yoshida, K., Kusaka, K., Yanagisawa, Y., Ohtake, M., Sato, H., Shimizu, Y., Baba, H., Kurokawa, M., Ohnishi, T., Tanaka, K., Tarasov, O.B., Bazin, D., Morrissey, D.J., Sherrill, B.M., Ieki, K., Murai, D., Iwasa, N., Chiba, A., Ohkoda, Y., Ideguchi, E., Go, S., Yokoyama, R., Fujii, T., Nishimura, D., Nishibata, H., Momota, S., Lewitowicz, M., DeFrance, G., Celikovic, I., Steiger, K.
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 15.12.2013
• Subjects: Cross section; Cross sections (physics); Energy measurement; Factories; In-flight fission; Industrial plants; Isotopes; New isotope; Nucleons; Production rate; Projectile fragmentation; Radioactive isotopes; RI beam separator; Separators; In-flight fission; Projectile fragmentation; Production rate; RI beam separator; Cross section; New isotope
• ISSN: 0168-583X; 1872-9584
• DOI: 10.1016/j.nimb.2013.08.049

•We measured the production cross sections for a variety of radioactive isotopes.•They were produced from 124Xe, 48Ca, and 238U beams at 345MeV/nucleon using BigRIPS.•The measured production cross sections were compared with the EPAX formulae.•We discovered four new isotopes 85,86Ru and 81,82Mo produced by 124Xe+Be.•103Sb is particle unbound with an upper limit of 49ns for the half-life. We have measured the production rates and production cross sections for a variety of radioactive isotopes which were produced from 124Xe, 48Ca, and 238U beams at an energy of 345MeV/nucleon using the BigRIPS separator at the RIKEN Nishina Center RI Beam Factory (RIBF). Proton-rich isotopes with atomic numbers Z=40–52 and neutron-rich isotopes with Z=5–16 were produced by projectile fragmentation of the 124Xe and 48Ca beam on Be targets, respectively. Neutron-rich isotopes with Z=20–59 were produced by in-flight fission of the 238U beam, in which both Be and Pb were used as production targets. The measured production rates and production cross sections were compared with those of the LISE++ calculations, and overall fairly good agreement has been obtained. Furthermore, in the measurements with the 124Xe beam, we have discovered four new isotopes on the proton-drip line, 85,86Ru and 81,82Mo, and obtained the clear evidence that 103Sb is particle unbound with an upper limit of 49ns for the half-life. The measurements of projectile-fragment momentum distributions have been also performed with the 124Xe beam, in which the low-momentum tails of the distributions have been measured for the first time at the energy of 345MeV/nucleon.