[en] In this work, we present negative-ion fractions as a function of exit velocity and angle after keV-energy negative oxygen and carbon ions scattering on a highly oriented pyrolytic graphite (HOPG) surface, at a scattering angle of 38°. The negative-ion fractions increase monotonously with the increase of exit velocity for specular scattering, while negative-ion fractions present a bell-shaped dependence on exit angle. In order to gain further insight into the nature of charge transfer on HOPG, a modified charge transfer model involving the contribution of positive ions has been proposed and roughly reproduced the velocity and angle dependences of negative-ion fractions.

[en] Objectives: Although mitochondria are known to play an important role in radiation-induced cellular damage response, the mechanisms of how radiation elicits mitochondrial responses are largely unknown.

[en] Purpose: The aim of this study was to evaluate the effect of histological subtypes of head and neck adenoid cystic carcinoma (ACC) on the results of carbon-ion radiotherapy (CIRT).

[en] The project of a superconducting medical synchrotron for carbon therapy in the ion energy range from 140 to 400 MeV/n is discussed in this paper. This project is aimed at developing and building a medical synchrotron on the basis of superconducting technologies at JINR under the construction of the Nuclotron accelerator complex. A linear accelerator with alternating phase focusing is proposed for injecting carbon ion into the synchrotron, while it is planned to use a superconducting gantry weighing about 150 t for delivering radiation treatment to patients from all directions.

[en] A Michelson Spectrophotometer system was used to obtain two spectra of Zeta Orionis covering the entire wavelength range from 4000 A to beyond 10,000 A. These spectra are of photometric precision and have been corrected for all significant atmospheric absorptions. The C III multiplet was identified and measured at 9701-17 A, which has not previously been measureable because of atmospheric water-vapor absorptions in this region. The 60-Angstrom-wide band around the C III feature at 5696 A is not confirmed

[en] Purpose: To summarize the results of treatment for sacral chordoma in Phase I-II and Phase II carbon ion radiotherapy trials for bone and soft-tissue sarcomas. Patients and Methods: We performed a retrospective analysis of 38 patients with medically unresectable sacral chordomas treated with the Heavy Ion Medical Accelerator in Chiba, Japan between 1996 and 2003. Of the 38 patients, 30 had not received previous treatment and 8 had locally recurrent tumor after previous resection. The applied carbon ion dose was 52.8-73.6 Gray equivalents (median, 70.4) in a total of 16 fixed fractions within 4 weeks. Results: The median patient age was 66 years. The cranial tumor extension was S2 or greater in 31 patients. The median clinical target volume was 523 cm³. The median follow-up period was 80 months. The 5-year overall survival rate was 86%, and the 5-year local control rate was 89%. After treatment, 27 of 30 patients with primary tumor remained ambulatory with or without supportive devices. Two patients experienced severe skin or soft-tissue complications requiring skin grafts. Conclusion: Carbon ion radiotherapy appears effective and safe in the treatment of patients with sacral chordoma and offers a promising alternative to surgery.

[en] At the Congress of the Societe Francaise de Radiotherapie Oncologique (S.F.R.O.) from 2007, will be presented as a poster the legal structure and the organisational structure of the governance of the project, regulatory steps and technical achievements of the project, the state of progress in November 2007, the organisation's recruitment and timing of realisation of the centre which is expected to open in late 2012. (N.C.)

[en] Highlights: • The different distribution patterns of multiply charged ions on polarization state is presented. • A theoretical calculation could explain the related experimental results. • The cluster disintegration should be considered for the production of multiply charged ions. This paper investigated the dependence of multiply charged ions on the laser polarization state when benzene cluster was irradiated with 532 and 1064 nm nanosecond laser. A circle, square and flower distribution for C²⁺, C³⁺ and C⁴⁺ were observed with 532 nm laser respectively, while flower petals for C²⁺, C³⁺ and C⁴⁺ were observed at 1064 nm as the laser polarization varied. A theoretical calculation was performed to interpret the polarization state and wavelength dependence of the multiply charged ions. The simulated results agreed well with the experimental observation with considering the contribution from the cluster disintegration.

[en] Using 121.4 fb⁻¹ of data collected with the Belle detector at the ϒ(5S) resonance at the KEKB asymmetric-energy e⁺e⁻ collider, we report evidence for the B^¯_s⁰→Λ_c⁺Λ^¯π⁻ decay mode with a measured branching fraction (3.6±1.1[stat.]_−0.5^+0.3[syst.]±0.9[Λ_c⁺]±0.7[N_B^¯s⁰])×10⁻⁴ and a significance of 4.4 standard deviations. This is the first evidence for a baryonic B_s⁰ decay

[en] Negative carbon ions formation rate during bombarding of cometary ice surface by charged solar particles (hydrogen protons) is calculated in this work. Experimentally obtained Na⁺, K⁺, Rb⁺, Cs⁺ and Ar⁺ negative ions emission coefficients are used to accomplish this task. (author)