نتایج جستجو برای: 7be concentrations
تعداد نتایج: 307122 فیلتر نتایج به سال:
Abstract. The short-living cosmogenic isotope 7Be, which is produced by cosmic rays in the atmosphere, often used as a tracer for atmospheric dynamics, with precise and high-resolution measurements covering recent decades. long-living 10Be, measured polar ice cores an annual resolution, proxy long-term cosmic-ray variability, whose signal can, however, be distorted transport deposition that nee...
The HERON project is an R&D effort to create a detector suitable for real-time, high rate measurement of neutrinos from both the p-p and 7Be reactions in the Sun using superfluid helium as the target medium. Progress on studies of particle detection processes in superfluid, on development of sensors, on backgrounds, and on event energy and position measurement which are related to this goal are...
Angular distributions of the 12 C (d, 7Li) VBe reaction to the ground and to the unresolved first excited states of VLi or 7Be nuclei were measured in the entire angular region in the centre of mass system at El,b----78.0 MeV. Both the one-step five-nucleon cluster transfer as well as two-step sequential transfers were considered in the theoretical analysis. The former mechanism was found to do...
1. Violence Prevention Research Unit, Centre for Psychiatry, Wolfson Institute of Preventive Medicine, Barts and The London School of Medicine and Dentistry, Queen Mary, University of London, London, UK, EC1A 7BE. 2. Risk and Information Management Research Group, School of Electronic Engineering and Computer Science, Queen Mary, University of London, London, UK, E1 4NS. 3. Forensic Personality...
Abstract. Events of very high concentrations 7Be cosmogenic radionuclide have been recorded at low-elevation surface stations in the subpolar regions Europe during cold season. With an aim to investigate mechanisms responsible for those peak events, and particular verify if they are associated with fast descent stratospheric air masses occurring sudden warming (SSW) we analyze observations six ...
A. Gando,1 Y. Gando,1 H. Hanakago,1 H. Ikeda,1 K. Inoue,1,2 K. Ishidoshiro,1 H. Ishikawa,1 Y. Kishimoto,1,2,* M. Koga,1,2 R. Matsuda,1 S. Matsuda,1 T. Mitsui,1 D. Motoki,1 K. Nakajima,1,† K. Nakamura,1,2 A. Obata,1 A. Oki,1 Y. Oki,1 M. Otani,1,‡ I. Shimizu,1 J. Shirai,1 A. Suzuki,1 K. Tamae,1 K. Ueshima,1 H. Watanabe,1 B. D. Xu,1 S. Yamada,1,‡ Y. Yamauchi,1 H. Yoshida,1,§ A. Kozlov,2 Y. Takemot...
Correspondence to: Dr D J Powrie, Academic Unit of Respiratory Medicine, Dominion House, St Bartholomew’s Hospital, London EC1A 7BE, UK; duncanpowrie@ hotmail.com . . . . . . . . . . . . . . . . . . . . . . . T he Winter Meeting of the BTS affords us the opportunity to catch up with friends and colleagues and to keep abreast of recent advances. Perhaps most importantly, it is also an ideal foru...
ABSTRACT The recurrent nova RS Oph underwent a new outburst on 2021 August 8, reaching visible brightness of V = 4.8 mag. Observations the made with high-resolution UVES spectrograph at Kueyen-UT2 telescope ESO-VLT in Paranal enabled detection possible presence 7Be newly thermonuclear runaway reactions. yields can be estimated N(7Be)/N(H) 5.7 × 10?6, which are close to lowest measured classical...
Spallation cross sections for 250 MeV to 2 GeV protons bombarding thin targets of natural copper were determined via the foil activation technique. This energy range is important cosmogenic radionuclide production in interplanetary space bombardment by galactic cosmic-ray protons. Cross are reported 60Co, 58Co, 57Co, 56Co, 56Ni, 59Fe, 54Mn, 52Mng, 51Cr, 48V, 47Sc, 46Sc, 44Scm, and 7Be. The 44Sc...
in the present study, the effect of e-64 at different concentrations (0.5, 1, 5 and 10 µm) added to (1) the ivm medium on oocyte nuclear maturation and developmental competence of ovine oocytes, and (2) to the ivc medium on embryonic development of ovine embryos were investigated.
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