Atomic charge-exchange between semi-relativistic (v/c = 0.49) helium ions and targets from carbon to lead

R. Meharchand, H. Akimune, A. M. van den Berg, Y. Fujita, M. Fujiwara, S. Galès, M. N. Harakeh, H. Hashimoto, R. Hayami, G. W. Hitt, M. Itoh, T. Kawabata, K. Kawase, M. Kinoshita, K. Nakanishi, S. Nakayama, S. Okumura, Y. Shimbara, M. Uchida, T. YamagataM. Yosoi, R. G.T. Zegers

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)

Abstract

Ratios of equilibrium charge-state yields for singly to doubly ionized 3He ions at an energy of 420 MeV were measured using the Grand Raiden magnetic spectrometer at RCNP. Targets with atomic numbers of 6, 12, 28, 40, 50 and 82 were used. It is found that theoretical calculations for atomic electron-capture and stripping cross sections, which have been successful in describing the data up to beam energies of 200 MeV, are also applicable at this higher energy. However, where at the lower energies the stripping cross sections were calculated with a combination of models by Bohr and Gillespie, the best description of the data at E(3He) = 420 MeV is obtained when using only the model by Gillespie. The experimental results are also compared with calculations using the code CHARGE, originally developed for fast, heavy (Z > 29) projectiles, to test the extrapolation to low-Z projectiles. It is found that the code underestimates the production of singly-charged 3He ions, in particular for heavier target nuclei.

Original languageEnglish
Pages (from-to)221-226
Number of pages6
JournalNuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms
Volume264
Issue number2
DOIs
Publication statusPublished - 2007 Nov

Keywords

  • Atomic charge-exchange
  • Capture
  • Ionization (stripping)

ASJC Scopus subject areas

  • Nuclear and High Energy Physics
  • Instrumentation

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