TY - JOUR
T1 - Atomic charge-exchange between semi-relativistic (v/c = 0.49) helium ions and targets from carbon to lead
AU - Meharchand, R.
AU - Akimune, H.
AU - van den Berg, A. M.
AU - Fujita, Y.
AU - Fujiwara, M.
AU - Galès, S.
AU - Harakeh, M. N.
AU - Hashimoto, H.
AU - Hayami, R.
AU - Hitt, G. W.
AU - Itoh, M.
AU - Kawabata, T.
AU - Kawase, K.
AU - Kinoshita, M.
AU - Nakanishi, K.
AU - Nakayama, S.
AU - Okumura, S.
AU - Shimbara, Y.
AU - Uchida, M.
AU - Yamagata, T.
AU - Yosoi, M.
AU - Zegers, R. G.T.
N1 - Funding Information:
We thank the cyclotron staff at RCNP for their support during the experiment. This work was supported by the US NSF (PHY-0606007), the Ministry of Education, Science, Sports and Culture of Japan, the Stichting voor Fundamenteel Onderzoek der Materie (FOM), the Netherlands. R.M. and R.Z. wish to thank Joachim Jänecke for providing the detailed information on the analysis given in [13] . In addition, they wish to thank Dave Morrissey and Georg Bollen for discussions on the importance of charge-state production in experiments with radioactive beams.
PY - 2007/11
Y1 - 2007/11
N2 - 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.
AB - 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.
KW - Atomic charge-exchange
KW - Capture
KW - Ionization (stripping)
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U2 - 10.1016/j.nimb.2007.08.078
DO - 10.1016/j.nimb.2007.08.078
M3 - Article
AN - SCOPUS:36048979067
SN - 0168-583X
VL - 264
SP - 221
EP - 226
JO - Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms
JF - Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms
IS - 2
ER -