@article{oai:repo.qst.go.jp:00043724,
 author = {佐藤, 幸夫 and 大澤, 大輔 and 岡田, 裕樹 and 佐藤 幸夫 and 大澤 大輔 and 岡田 裕樹},
 issue = {1},
 journal = {放射線},
 month = {Jan},
 note = {We measured the energy and angular distributions(7-1000 eV and 20-160) of secondary electrons produced in the collision of 6.0 MeV/u He2+ ions with vapor, in order to discuss a relation between the track structure and high-LET effects. From these measurement the doubly diffrntial cross sections (DDCS) of electron emissions were deduced with an estimated uncertainty of +-13 percents. The energy distribution with the empiruical(SDCS) was also obtained by integrating the DDCS values with respect to the ejected angles and compared with the empirical model of Rudd.The energy spectrum(SDCS) showed a good agreement with the model of Rudd in the energy range<100eV.However,in the range 100-1000 eV the SDCS showed large discrepancies by -40percents,and was   nearly twice greater in the region>3keV. To assess the new cross sections these values were incorporated in the kurbuc Monte Carlo track structure code system for simulation of secondary electrons.Radial dose distributions were obtained by analyzing the tracks generated by the code kurbuc using the new DDCS values. In the core with the radius(gamma) less than 1nm the dose is very high due mainly to excitation events induced by low-energy electrons,while the penumbra shows a well-known gumma-2 dependence.},
 pages = {33--40},
 title = {重粒子線のトラック構造と高LET効果},
 volume = {31},
 year = {2005}
}